YARN-825. Fixed javadoc and annotations for yarn-common module. Contributed by Vinod Kumar Vavilapalli.

svn merge --ignore-ancestry -c 1493634 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1493635 13f79535-47bb-0310-9956-ffa450edef68

hadoop-yarn-project/CHANGES.txt

@@ -367,6 +367,8 @@ Release 2.1.0-beta - UNRELEASED
     YARN-752. In AMRMClient, automatically add corresponding rack requests for 
     requested nodes. (sandyr via tucu)
 
+    YARN-825. Fixed javadoc and annotations for yarn-common module. (vinodkv)
+
   OPTIMIZATIONS
 
     YARN-512. Log aggregation root directory check is more expensive than it

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/Clock.java

@@ -18,7 +18,15 @@
 
 package org.apache.hadoop.yarn;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
+
+/**
+ * A simple clock interface that gives you time.
+ */
+@Public
+@Stable
 public interface Clock {
 
   long getTime();
-}
+}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ClusterInfo.java

@@ -18,9 +18,11 @@
 
 package org.apache.hadoop.yarn;
 
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.yarn.api.records.Resource;
 import org.apache.hadoop.yarn.util.Records;
 
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public class ClusterInfo {
   private Resource maxContainerCapability;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ContainerLogAppender.java

@@ -22,16 +22,17 @@ import java.io.File;
 import java.util.LinkedList;
 import java.util.Queue;
 
-import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.log4j.FileAppender;
 import org.apache.log4j.spi.LoggingEvent;
 
 /**
- * A simple log4j-appender for the task child's 
- * map-reduce system logs.
+ * A simple log4j-appender for container's logs.
  * 
  */
-@InterfaceStability.Unstable
+@Public
+@Unstable
 public class ContainerLogAppender extends FileAppender {
   private String containerLogDir;
   //so that log4j can configure it from the configuration(log4j.properties). 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/SystemClock.java

@@ -17,6 +17,15 @@
 */
 package org.apache.hadoop.yarn;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
+
+/**
+ * Implementation of {@link Clock} that gives the current time from the system
+ * clock in milliseconds.
+ */
+@Public
+@Stable
 public class SystemClock implements Clock {
 
   public long getTime() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/YarnUncaughtExceptionHandler.java

@@ -22,6 +22,8 @@ import java.lang.Thread.UncaughtExceptionHandler;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.util.ExitUtil;
 import org.apache.hadoop.util.ShutdownHookManager;
 
@@ -34,6 +36,8 @@ import org.apache.hadoop.util.ShutdownHookManager;
  * Note: Right now it only will shut down the program if a Error is caught, but
  * not any other exception.  Anything else is just logged.
  */
+@Public
+@Evolving
 public class YarnUncaughtExceptionHandler implements UncaughtExceptionHandler {
   private static final Log LOG = LogFactory.getLog(YarnUncaughtExceptionHandler.class);
   

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/client/ApplicationClientProtocolPBClientImpl.java

@@ -22,6 +22,7 @@ import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
@@ -92,6 +93,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.SubmitApplicationRequestPr
 
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ApplicationClientProtocolPBClientImpl implements ApplicationClientProtocol,
     Closeable {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/client/ApplicationMasterProtocolPBClientImpl.java

@@ -22,6 +22,7 @@ import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
@@ -47,6 +48,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterR
 
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ApplicationMasterProtocolPBClientImpl implements ApplicationMasterProtocol, Closeable {
 
   private ApplicationMasterProtocolPB proxy;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/client/ContainerManagementProtocolPBClientImpl.java

@@ -22,6 +22,7 @@ import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.RPC;
@@ -50,6 +51,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.StopContainerRequestProto;
 
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ContainerManagementProtocolPBClientImpl implements ContainerManagementProtocol,
     Closeable {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/client/ResourceManagerAdministrationProtocolPBClientImpl.java

@@ -22,6 +22,7 @@ import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.ProtobufHelper;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
@@ -65,7 +66,7 @@ import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.Refre
 
 import com.google.protobuf.ServiceException;
 
-
+@Private
 public class ResourceManagerAdministrationProtocolPBClientImpl implements ResourceManagerAdministrationProtocol, Closeable {
 
   private ResourceManagerAdministrationProtocolPB proxy;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/service/ApplicationClientProtocolPBServiceImpl.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.api.impl.pb.service;
 
 import java.io.IOException;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.security.proto.SecurityProtos.CancelDelegationTokenRequestProto;
 import org.apache.hadoop.security.proto.SecurityProtos.CancelDelegationTokenResponseProto;
 import org.apache.hadoop.security.proto.SecurityProtos.GetDelegationTokenRequestProto;
@@ -87,6 +88,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.SubmitApplicationResponseP
 import com.google.protobuf.RpcController;
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ApplicationClientProtocolPBServiceImpl implements ApplicationClientProtocolPB {
 
   private ApplicationClientProtocol real;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/service/ApplicationMasterProtocolPBServiceImpl.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.api.impl.pb.service;
 
 import java.io.IOException;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.yarn.api.ApplicationMasterProtocol;
 import org.apache.hadoop.yarn.api.ApplicationMasterProtocolPB;
 import org.apache.hadoop.yarn.api.protocolrecords.AllocateResponse;
@@ -42,6 +43,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.RegisterApplicationMasterR
 import com.google.protobuf.RpcController;
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ApplicationMasterProtocolPBServiceImpl implements ApplicationMasterProtocolPB {
 
   private ApplicationMasterProtocol real;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/service/ContainerManagementProtocolPBServiceImpl.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.api.impl.pb.service;
 
 import java.io.IOException;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.yarn.api.ContainerManagementProtocol;
 import org.apache.hadoop.yarn.api.ContainerManagementProtocolPB;
 import org.apache.hadoop.yarn.api.protocolrecords.GetContainerStatusResponse;
@@ -42,6 +43,7 @@ import org.apache.hadoop.yarn.proto.YarnServiceProtos.StopContainerResponseProto
 import com.google.protobuf.RpcController;
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ContainerManagementProtocolPBServiceImpl implements ContainerManagementProtocolPB  {
 
   private ContainerManagementProtocol real;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/api/impl/pb/service/ResourceManagerAdministrationProtocolPBServiceImpl.java

@@ -20,6 +20,7 @@ package org.apache.hadoop.yarn.api.impl.pb.service;
 
 import java.io.IOException;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.yarn.api.ResourceManagerAdministrationProtocol;
 import org.apache.hadoop.yarn.api.ResourceManagerAdministrationProtocolPB;
 import org.apache.hadoop.yarn.api.protocolrecords.RefreshAdminAclsResponse;
@@ -41,11 +42,25 @@ import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RefreshSuperUserGroups
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RefreshUserToGroupsMappingsRequestPBImpl;
 import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.RefreshUserToGroupsMappingsResponsePBImpl;
 import org.apache.hadoop.yarn.exceptions.YarnException;
-import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.*;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.GetGroupsForUserRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.GetGroupsForUserResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshAdminAclsRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshAdminAclsResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshNodesRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshNodesResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshQueuesRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshQueuesResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshServiceAclsRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshServiceAclsResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshSuperUserGroupsConfigurationRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshSuperUserGroupsConfigurationResponseProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshUserToGroupsMappingsRequestProto;
+import org.apache.hadoop.yarn.proto.YarnServerResourceManagerServiceProtos.RefreshUserToGroupsMappingsResponseProto;
 
 import com.google.protobuf.RpcController;
 import com.google.protobuf.ServiceException;
 
+@Private
 public class ResourceManagerAdministrationProtocolPBServiceImpl implements ResourceManagerAdministrationProtocolPB {
 
   private ResourceManagerAdministrationProtocol real;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AbstractEvent.java

@@ -18,9 +18,14 @@
 
 package org.apache.hadoop.yarn.event;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
- * parent class of all the events. All events extend this class.
+ * Parent class of all the events. All events extend this class.
  */
+@Public
+@Evolving
 public abstract class AbstractEvent<TYPE extends Enum<TYPE>> 
     implements Event<TYPE> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/AsyncDispatcher.java

@@ -27,17 +27,21 @@ import java.util.concurrent.LinkedBlockingQueue;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.util.ShutdownHookManager;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.service.AbstractService;
 
 /**
- * Dispatches events in a separate thread. Currently only single thread does
- * that. Potentially there could be multiple channels for each event type
+ * Dispatches {@link Event}s in a separate thread. Currently only single thread
+ * does that. Potentially there could be multiple channels for each event type
  * class and a thread pool can be used to dispatch the events.
  */
 @SuppressWarnings("rawtypes")
+@Public
+@Evolving
 public class AsyncDispatcher extends AbstractService implements Dispatcher {
 
   private static final Log LOG = LogFactory.getLog(AsyncDispatcher.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/Dispatcher.java

@@ -18,12 +18,17 @@
 
 package org.apache.hadoop.yarn.event;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * Event Dispatcher interface. It dispatches events to registered 
  * event handlers based on event types.
  * 
  */
 @SuppressWarnings("rawtypes")
+@Public
+@Evolving
 public interface Dispatcher {
 
   // Configuration to make sure dispatcher crashes but doesn't do system-exit in

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/Event.java

@@ -18,10 +18,15 @@
 
 package org.apache.hadoop.yarn.event;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * Interface defining events api.
  *
  */
+@Public
+@Evolving
 public interface Event<TYPE extends Enum<TYPE>> {
 
   TYPE getType();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/EventHandler.java

@@ -18,11 +18,17 @@
 
 package org.apache.hadoop.yarn.event;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * Interface for handling events of type T
  *
- * @param <T> paremeterized event of type T
+ * @param <T> parameterized event of type T
  */
+@SuppressWarnings("rawtypes")
+@Public
+@Evolving
 public interface EventHandler<T extends Event> {
 
   void handle(T event);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/event/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.Public
 package org.apache.hadoop.yarn.event;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/RpcClientFactory.java

@@ -20,8 +20,10 @@ package org.apache.hadoop.yarn.factories;
 
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public interface RpcClientFactory {
   
   public Object getClient(Class<?> protocol, long clientVersion,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/RpcServerFactory.java

@@ -20,11 +20,13 @@ package org.apache.hadoop.yarn.factories;
 
 import java.net.InetSocketAddress;
 
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.Server;
 import org.apache.hadoop.security.token.SecretManager;
 import org.apache.hadoop.security.token.TokenIdentifier;
 
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public interface RpcServerFactory {
   
   public Server getServer(Class<?> protocol, Object instance,

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/impl/pb/RecordFactoryPBImpl.java

@@ -23,10 +23,12 @@ import java.lang.reflect.InvocationTargetException;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.factories.RecordFactory;
 
+@Private
 public class RecordFactoryPBImpl implements RecordFactory {
 
   private static final String PB_IMPL_PACKAGE_SUFFIX = "impl.pb";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/impl/pb/RpcClientFactoryPBImpl.java

@@ -27,10 +27,12 @@ import java.util.concurrent.ConcurrentMap;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.factories.RpcClientFactory;
 
+@Private
 public class RpcClientFactoryPBImpl implements RpcClientFactory {
 
   private static final Log LOG = LogFactory

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/impl/pb/RpcServerFactoryPBImpl.java

@@ -28,6 +28,7 @@ import java.util.concurrent.ConcurrentMap;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.ProtobufRpcEngine;
 import org.apache.hadoop.ipc.Server;
@@ -39,6 +40,7 @@ import org.apache.hadoop.yarn.factories.RpcServerFactory;
 
 import com.google.protobuf.BlockingService;
 
+@Private
 public class RpcServerFactoryPBImpl implements RpcServerFactory {
 
   private static final Log LOG = LogFactory.getLog(RpcServerFactoryPBImpl.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factories/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 package org.apache.hadoop.yarn.factories;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factory/providers/RpcFactoryProvider.java

@@ -21,6 +21,7 @@ package org.apache.hadoop.yarn.factory.providers;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
@@ -30,6 +31,7 @@ import org.apache.hadoop.yarn.factories.RpcServerFactory;
 /**
  * A public static get() method must be present in the Client/Server Factory implementation.
  */
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public class RpcFactoryProvider {
 
   private RpcFactoryProvider() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/factory/providers/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 package org.apache.hadoop.yarn.factory.providers;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/HadoopYarnProtoRPC.java

@@ -22,6 +22,7 @@ import java.net.InetSocketAddress;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.Server;
 import org.apache.hadoop.security.token.SecretManager;
@@ -35,6 +36,7 @@ import org.apache.hadoop.yarn.factory.providers.RpcFactoryProvider;
  * RPC wire format is non-standard, but it does permit use of Protocol Buffers
  *  protocol versioning features for inter-Java RPCs.
  */
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public class HadoopYarnProtoRPC extends YarnRPC {
 
   private static final Log LOG = LogFactory.getLog(HadoopYarnProtoRPC.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/RPCUtil.java

@@ -22,11 +22,13 @@ import java.io.IOException;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.yarn.exceptions.YarnException;
 
 import com.google.protobuf.ServiceException;
 
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public class RPCUtil {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/YarnRPC.java

@@ -22,6 +22,7 @@ import java.net.InetSocketAddress;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.ipc.Server;
 import org.apache.hadoop.security.token.SecretManager;
@@ -32,6 +33,7 @@ import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 /**
  * Abstraction to get the RPC implementation for Yarn.
  */
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 public abstract class YarnRPC {
   private static final Log LOG = LogFactory.getLog(YarnRPC.class);
   

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/ipc/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.LimitedPrivate({ "MapReduce", "YARN" })
 package org.apache.hadoop.yarn.ipc;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogDeletionService.java

@@ -24,6 +24,7 @@ import java.util.TimerTask;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
@@ -32,6 +33,10 @@ import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.service.AbstractService;
 
+/**
+ * A service that periodically deletes aggregated logs.
+ */
+@Private
 public class AggregatedLogDeletionService extends AbstractService {
   private static final Log LOG = LogFactory.getLog(AggregatedLogDeletionService.class);
   

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java

@@ -42,6 +42,9 @@ import java.util.Map.Entry;
 import org.apache.commons.io.input.BoundedInputStream;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CreateFlag;
 import org.apache.hadoop.fs.FSDataInputStream;
@@ -60,9 +63,11 @@ import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
+@Public
+@Evolving
 public class AggregatedLogFormat {
 
-  static final Log LOG = LogFactory.getLog(AggregatedLogFormat.class);
+  private static final Log LOG = LogFactory.getLog(AggregatedLogFormat.class);
   private static final LogKey APPLICATION_ACL_KEY = new LogKey("APPLICATION_ACL");
   private static final LogKey APPLICATION_OWNER_KEY = new LogKey("APPLICATION_OWNER");
   private static final LogKey VERSION_KEY = new LogKey("VERSION");
@@ -84,7 +89,8 @@ public class AggregatedLogFormat {
     RESERVED_KEYS.put(APPLICATION_OWNER_KEY.toString(), APPLICATION_OWNER_KEY);
     RESERVED_KEYS.put(VERSION_KEY.toString(), VERSION_KEY);
   }
-  
+
+  @Public
   public static class LogKey implements Writable {
 
     private String keyString;
@@ -118,11 +124,13 @@ public class AggregatedLogFormat {
       return false;
     }
 
+    @Private
     @Override
     public void write(DataOutput out) throws IOException {
       out.writeUTF(this.keyString);
     }
 
+    @Private
     @Override
     public void readFields(DataInput in) throws IOException {
       this.keyString = in.readUTF();
@@ -134,6 +142,7 @@ public class AggregatedLogFormat {
     }
   }
 
+  @Private
   public static class LogValue {
 
     private final List<String> rootLogDirs;
@@ -207,6 +216,10 @@ public class AggregatedLogFormat {
     }
   }
 
+  /**
+   * The writer that writes out the aggregated logs.
+   */
+  @Private
   public static class LogWriter {
 
     private final FSDataOutputStream fsDataOStream;
@@ -295,6 +308,8 @@ public class AggregatedLogFormat {
     }
   }
 
+  @Public
+  @Evolving
   public static class LogReader {
 
     private final FSDataInputStream fsDataIStream;
@@ -411,6 +426,7 @@ public class AggregatedLogFormat {
      *         logs could not be found
      * @throws IOException
      */
+    @Private
     public ContainerLogsReader getContainerLogsReader(
         ContainerId containerId) throws IOException {
       ContainerLogsReader logReader = null;
@@ -559,6 +575,7 @@ public class AggregatedLogFormat {
     }
   }
 
+  @Private
   public static class ContainerLogsReader {
     private DataInputStream valueStream;
     private String currentLogType = null;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/ContainerLogsRetentionPolicy.java

@@ -18,6 +18,12 @@
 
 package org.apache.hadoop.yarn.logaggregation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+
+@Private
+/**
+ * This API is not exposed to end-users yet.
+ */
 public enum ContainerLogsRetentionPolicy {
   APPLICATION_MASTER_ONLY, AM_AND_FAILED_CONTAINERS_ONLY, ALL_CONTAINERS 
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogAggregationUtils.java

@@ -18,12 +18,14 @@
 
 package org.apache.hadoop.yarn.logaggregation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 
+@Private
 public class LogAggregationUtils {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogDumper.java

@@ -31,6 +31,9 @@ import org.apache.commons.cli.HelpFormatter;
 import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
 import org.apache.commons.lang.StringUtils;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configured;
 import org.apache.hadoop.fs.FileContext;
@@ -47,6 +50,10 @@ import org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat.LogKey;
 import org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat.LogReader;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
+import com.google.common.annotations.VisibleForTesting;
+
+@Public
+@Evolving
 public class LogDumper extends Configured implements Tool {
 
   private static final String CONTAINER_ID_OPTION = "containerId";
@@ -133,6 +140,8 @@ public class LogDumper extends Configured implements Tool {
     return resultCode;
   }
 
+  @Private
+  @VisibleForTesting
   public int dumpAContainersLogs(String appId, String containerId,
       String nodeId, String jobOwner) throws IOException {
     Path remoteRootLogDir =

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@InterfaceAudience.Public
+package org.apache.hadoop.yarn.logaggregation;
+import org.apache.hadoop.classification.InterfaceAudience;
+

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@InterfaceAudience.Public
+package org.apache.hadoop.yarn;
+import org.apache.hadoop.classification.InterfaceAudience;
+

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/AdminACLsManager.java

@@ -23,12 +23,14 @@ import java.io.IOException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.authorize.AccessControlList;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 
+@Private
 public class AdminACLsManager {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ApplicationTokenIdentifier.java

@@ -24,6 +24,8 @@ import java.io.IOException;
 
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
@@ -35,6 +37,8 @@ import org.apache.hadoop.yarn.api.records.ApplicationId;
  * ApplicationTokenIdentifier is the TokenIdentifier to be used by
  * ApplicationMasters to authenticate to the ResourceManager.
  */
+@Public
+@Evolving
 public class ApplicationTokenIdentifier extends TokenIdentifier {
 
   public static final Text KIND_NAME = new Text("YARN_APPLICATION_TOKEN");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ApplicationTokenSelector.java

@@ -22,11 +22,15 @@ import java.util.Collection;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.security.token.TokenSelector;
 
+@Public
+@Evolving
 public class ApplicationTokenSelector implements
     TokenSelector<ApplicationTokenIdentifier> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ContainerManagerSecurityInfo.java

@@ -20,6 +20,8 @@ package org.apache.hadoop.yarn.security;
 
 import java.lang.annotation.Annotation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.KerberosInfo;
 import org.apache.hadoop.security.SecurityInfo;
@@ -28,6 +30,8 @@ import org.apache.hadoop.security.token.TokenInfo;
 import org.apache.hadoop.security.token.TokenSelector;
 import org.apache.hadoop.yarn.api.ContainerManagementProtocolPB;
 
+@Public
+@Stable
 public class ContainerManagerSecurityInfo extends SecurityInfo {
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ContainerTokenIdentifier.java

@@ -25,6 +25,8 @@ import java.io.IOException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
@@ -39,6 +41,8 @@ import org.apache.hadoop.yarn.api.records.Resource;
  * {@link Resource} needed by the container and the target NMs host-address.
  * 
  */
+@Public
+@Evolving
 public class ContainerTokenIdentifier extends TokenIdentifier {
 
   private static Log LOG = LogFactory.getLog(ContainerTokenIdentifier.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/ContainerTokenSelector.java

@@ -22,11 +22,15 @@ import java.util.Collection;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.security.token.TokenSelector;
 
+@Public
+@Stable
 public class ContainerTokenSelector implements
     TokenSelector<ContainerTokenIdentifier> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/NMTokenIdentifier.java

@@ -25,6 +25,8 @@ import java.net.InetSocketAddress;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.net.NetUtils;
 import org.apache.hadoop.security.SecurityUtil;
@@ -35,7 +37,8 @@ import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.Token;
 
-
+@Public
+@Evolving
 public class NMTokenIdentifier extends TokenIdentifier {
 
   private static Log LOG = LogFactory.getLog(NMTokenIdentifier.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/SchedulerSecurityInfo.java

@@ -20,6 +20,8 @@ package org.apache.hadoop.yarn.security;
 
 import java.lang.annotation.Annotation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.KerberosInfo;
 import org.apache.hadoop.security.SecurityInfo;
@@ -28,6 +30,8 @@ import org.apache.hadoop.security.token.TokenInfo;
 import org.apache.hadoop.security.token.TokenSelector;
 import org.apache.hadoop.yarn.api.ApplicationMasterProtocolPB;
 
+@Public
+@Stable
 public class SchedulerSecurityInfo extends SecurityInfo {
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/admin/AdminSecurityInfo.java

@@ -20,6 +20,8 @@ package org.apache.hadoop.yarn.security.admin;
 
 import java.lang.annotation.Annotation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.KerberosInfo;
 import org.apache.hadoop.security.SecurityInfo;
@@ -27,6 +29,8 @@ import org.apache.hadoop.security.token.TokenInfo;
 import org.apache.hadoop.yarn.api.ResourceManagerAdministrationProtocolPB;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 
+@Public
+@Stable
 public class AdminSecurityInfo extends SecurityInfo {
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/admin/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@InterfaceAudience.Public
+package org.apache.hadoop.yarn.security.admin;
+import org.apache.hadoop.classification.InterfaceAudience;
+

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/BaseClientToAMTokenSecretManager.java

@@ -20,15 +20,29 @@ package org.apache.hadoop.yarn.security.client;
 
 import javax.crypto.SecretKey;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.security.token.SecretManager;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 
+/**
+ * A base {@link SecretManager} for AMs to extend and validate Client-RM tokens
+ * issued to clients by the RM using the underlying master-key shared by RM to
+ * the AMs on their launch. All the methods are called by either Hadoop RPC or
+ * YARN, so this class is strictly for the purpose of inherit/extend and
+ * register with Hadoop RPC.
+ */
+@Public
+@Evolving
 public abstract class BaseClientToAMTokenSecretManager extends
     SecretManager<ClientTokenIdentifier> {
 
+  @Private
   public abstract SecretKey getMasterKey(
       ApplicationAttemptId applicationAttemptId);
 
+  @Private
   @Override
   public synchronized byte[] createPassword(
       ClientTokenIdentifier identifier) {
@@ -36,6 +50,7 @@ public abstract class BaseClientToAMTokenSecretManager extends
       getMasterKey(identifier.getApplicationAttemptID()));
   }
 
+  @Private
   @Override
   public byte[] retrievePassword(ClientTokenIdentifier identifier)
       throws SecretManager.InvalidToken {
@@ -46,6 +61,7 @@ public abstract class BaseClientToAMTokenSecretManager extends
     return createPassword(identifier.getBytes(), masterKey);
   }
 
+  @Private
   @Override
   public ClientTokenIdentifier createIdentifier() {
     return new ClientTokenIdentifier();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/ClientRMSecurityInfo.java

@@ -20,6 +20,8 @@ package org.apache.hadoop.yarn.security.client;
 
 import java.lang.annotation.Annotation;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.KerberosInfo;
 import org.apache.hadoop.security.SecurityInfo;
@@ -29,6 +31,8 @@ import org.apache.hadoop.security.token.TokenSelector;
 import org.apache.hadoop.yarn.api.ApplicationClientProtocolPB;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 
+@Public
+@Stable
 public class ClientRMSecurityInfo extends SecurityInfo {
 
   @Override

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/ClientToAMTokenSecretManager.java

@@ -20,9 +20,20 @@ package org.apache.hadoop.yarn.security.client;
 
 import javax.crypto.SecretKey;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.security.token.SecretManager;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 
+/**
+ * A simple {@link SecretManager} for AMs to validate Client-RM tokens issued to
+ * clients by the RM using the underlying master-key shared by RM to the AMs on
+ * their launch. All the methods are called by either Hadoop RPC or YARN, so
+ * this class is strictly for the purpose of inherit/extend and register with
+ * Hadoop RPC.
+ */
+@Public
+@Evolving
 public class ClientToAMTokenSecretManager extends
     BaseClientToAMTokenSecretManager {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/ClientTokenIdentifier.java

@@ -23,6 +23,8 @@ import java.io.DataOutput;
 import java.io.IOException;
 
 import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
@@ -30,6 +32,8 @@ import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 
+@Public
+@Evolving
 public class ClientTokenIdentifier extends TokenIdentifier {
 
   public static final Text KIND_NAME = new Text("YARN_CLIENT_TOKEN");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/ClientTokenSelector.java

@@ -22,11 +22,15 @@ import java.util.Collection;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.security.token.TokenSelector;
 
+@Public
+@Stable
 public class ClientTokenSelector implements
     TokenSelector<ClientTokenIdentifier> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/RMDelegationTokenSelector.java

@@ -22,11 +22,15 @@ import java.util.Collection;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.security.token.TokenSelector;
 
+@Public
+@Stable
 public class RMDelegationTokenSelector implements
     TokenSelector<RMDelegationTokenIdentifier> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.Public
 package org.apache.hadoop.yarn.security.client;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.Public
 package org.apache.hadoop.yarn.security;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/server/security/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@InterfaceAudience.Private
+package org.apache.hadoop.yarn.server.security;
+import org.apache.hadoop.classification.InterfaceAudience;
+

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/AbstractService.java

@@ -25,14 +25,19 @@ import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import com.google.common.annotations.VisibleForTesting;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 
+import com.google.common.annotations.VisibleForTesting;
+
 /**
  * This is the base implementation class for YARN services.
  */
+@Public
+@Evolving
 public abstract class AbstractService implements Service {
 
   private static final Log LOG = LogFactory.getLog(AbstractService.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/CompositeService.java

@@ -24,12 +24,15 @@ import java.util.List;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 
 /**
  * Composition of services.
  */
+@Public
+@Evolving
 public class CompositeService extends AbstractService {
 
   private static final Log LOG = LogFactory.getLog(CompositeService.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/FilterService.java

@@ -1,115 +0,0 @@
-/**
-* Licensed to the Apache Software Foundation (ASF) under one
-* or more contributor license agreements.  See the NOTICE file
-* distributed with this work for additional information
-* regarding copyright ownership.  The ASF licenses this file
-* to you under the Apache License, Version 2.0 (the
-* "License"); you may not use this file except in compliance
-* with the License.  You may obtain a copy of the License at
-*
-*     http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-package org.apache.hadoop.yarn.service;
-
-import org.apache.hadoop.conf.Configuration;
-
-import java.io.IOException;
-import java.util.List;
-import java.util.Map;
-
-public class FilterService implements Service {
-
-  private final Service service;
-  private final long startTime = System.currentTimeMillis();
-
-  public FilterService(Service service) {
-    this.service = service;
-  }
-
-  @Override
-  public void init(Configuration config) {
-    service.init(config);
-  }
-
-  @Override
-  public void start() {
-    service.start();
-  }
-
-  @Override
-  public void stop() {
-    service.stop();
-  }
-
-  @Override
-  public void close() throws IOException {
-    service.close();
-  }
-
-  @Override
-  public void registerServiceListener(ServiceStateChangeListener listener) {
-    service.registerServiceListener(listener);
-  }
-
-  @Override
-  public void unregisterServiceListener(ServiceStateChangeListener listener) {
-    service.unregisterServiceListener(listener);
-  }
-
-  @Override
-  public String getName() {
-    return service.getName();
-  }
-
-  @Override
-  public Configuration getConfig() {
-    return service.getConfig();
-  }
-
-  @Override
-  public STATE getServiceState() {
-    return service.getServiceState();
-  }
-
-  @Override
-  public long getStartTime() {
-    return startTime;
-  }
-
-  @Override
-  public boolean isInState(STATE state) {
-    return service.isInState(state);
-  }
-
-  @Override
-  public Throwable getFailureCause() {
-    return service.getFailureCause();
-  }
-
-  @Override
-  public STATE getFailureState() {
-    return service.getFailureState();
-  }
-
-  @Override
-  public boolean waitForServiceToStop(long timeout) {
-    return service.waitForServiceToStop(timeout);
-  }
-
-  @Override
-  public List<LifecycleEvent> getLifecycleHistory() {
-    return service.getLifecycleHistory();
-  }
-
-  @Override
-  public Map<String, String> getBlockers() {
-    return service.getBlockers();
-  }
-}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/LifecycleEvent.java

@@ -19,11 +19,19 @@ package org.apache.hadoop.yarn.service;
 
 import java.io.Serializable;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * A serializable lifecycle event: the time a state
  * transition occurred, and what state was entered.
  */
+@Public
+@Evolving
 public class LifecycleEvent implements Serializable {
+  
+  private static final long serialVersionUID = 1648576996238247836L;
+
   /**
    * Local time in milliseconds when the event occurred
    */

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/LoggingStateChangeListener.java

@@ -20,10 +20,14 @@ package org.apache.hadoop.yarn.service;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 
 /**
  * This is a state change listener that logs events at INFO level
  */
+@Public
+@Evolving
 public class LoggingStateChangeListener implements ServiceStateChangeListener {
 
   private static final Log LOG = LogFactory.getLog(LoggingStateChangeListener.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/Service.java

@@ -18,6 +18,8 @@
 
 package org.apache.hadoop.yarn.service;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.conf.Configuration;
 
 import java.io.Closeable;
@@ -28,6 +30,8 @@ import java.util.Map;
 /**
  * Service LifeCycle.
  */
+@Public
+@Evolving
 public interface Service extends Closeable {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/ServiceOperations.java

@@ -18,19 +18,20 @@
 
 package org.apache.hadoop.yarn.service;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.util.ShutdownHookManager;
-
-import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * This class contains a set of methods to work with services, especially
  * to walk them through their lifecycle.
  */
+@Public
+@Evolving
 public final class ServiceOperations {
   private static final Log LOG = LogFactory.getLog(AbstractService.class);
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/ServiceStateChangeListener.java

@@ -18,9 +18,14 @@
 
 package org.apache.hadoop.yarn.service;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Stable;
+
 /**
  * Interface to notify state changes of a service.
  */
+@Public
+@Stable
 public interface ServiceStateChangeListener {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/ServiceStateException.java

@@ -18,14 +18,20 @@
 
 package org.apache.hadoop.yarn.service;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.yarn.exceptions.YarnException;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 
 /**
  * Exception that is raised on state change operations.
  */
+@Public
+@Evolving
 public class ServiceStateException extends YarnRuntimeException {
 
+  private static final long serialVersionUID = 1110000352259232646L;
+
   public ServiceStateException(String message) {
     super(message);
   }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/ServiceStateModel.java

@@ -18,9 +18,14 @@
 
 package org.apache.hadoop.yarn.service;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
 /**
  * Implements the service state model for YARN.
  */
+@Public
+@Evolving
 public class ServiceStateModel {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/service/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.Public
 package org.apache.hadoop.yarn.service;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/InvalidStateTransitonException.java

@@ -18,11 +18,17 @@
 
 package org.apache.hadoop.yarn.state;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 
+@Public
+@Evolving
 public class InvalidStateTransitonException extends YarnRuntimeException {
 
- private Enum<?> currentState;
+  private static final long serialVersionUID = 8610511635996283691L;
+
+  private Enum<?> currentState;
   private Enum<?> event;
 
   public InvalidStateTransitonException(Enum<?> currentState, Enum<?> event) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/MultipleArcTransition.java

@@ -18,13 +18,16 @@
 
 package org.apache.hadoop.yarn.state;
 
-
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 
 /**
  * Hook for Transition. 
  * Post state is decided by Transition hook. Post state must be one of the 
  * valid post states registered in StateMachine.
  */
+@Public
+@Evolving
 public interface MultipleArcTransition
         <OPERAND, EVENT, STATE extends Enum<STATE>> {
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/SingleArcTransition.java

@@ -18,11 +18,15 @@
 
 package org.apache.hadoop.yarn.state;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 
 /**
  * Hook for Transition. This lead to state machine to move to 
  * the post state as registered in the state machine.
  */
+@Public
+@Evolving
 public interface SingleArcTransition<OPERAND, EVENT> {
   /**
    * Transition hook.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/StateMachine.java

@@ -18,6 +18,11 @@
 
 package org.apache.hadoop.yarn.state;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
+
+@Public
+@Evolving
 public interface StateMachine
                  <STATE extends Enum<STATE>,
                   EVENTTYPE extends Enum<EVENTTYPE>, EVENT> {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/StateMachineFactory.java

@@ -26,6 +26,8 @@ import java.util.Map.Entry;
 import java.util.Set;
 import java.util.Stack;
 
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.yarn.util.Graph;
 
 /**
@@ -40,6 +42,8 @@ import org.apache.hadoop.yarn.util.Graph;
  * @param <EVENT> The event object.
  *
  */
+@Public
+@Evolving
 final public class StateMachineFactory
              <OPERAND, STATE extends Enum<STATE>,
               EVENTTYPE extends Enum<EVENTTYPE>, EVENT> {
@@ -453,6 +457,7 @@ final public class StateMachineFactory
    * @param name graph name
    * @return Graph object generated
    */
+  @SuppressWarnings("rawtypes")
   public Graph generateStateGraph(String name) {
     maybeMakeStateMachineTable();
     Graph g = new Graph(name);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/package-info.java

@@ -15,7 +15,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceAudience.Private
+@InterfaceAudience.Public
 package org.apache.hadoop.yarn.state;
 import org.apache.hadoop.classification.InterfaceAudience;
 

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/AbstractLivelinessMonitor.java

@@ -24,9 +24,18 @@ import java.util.Map;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Evolving;
 import org.apache.hadoop.yarn.Clock;
 import org.apache.hadoop.yarn.service.AbstractService;
 
+/**
+ * A simple liveliness monitor with which clients can register, trust the
+ * component to monitor liveliness, get a call-back on expiry and then finally
+ * unregister.
+ */
+@Public
+@Evolving
 public abstract class AbstractLivelinessMonitor<O> extends AbstractService {
 
   private static final Log LOG = LogFactory.getLog(AbstractLivelinessMonitor.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ApplicationClassLoader.java

@@ -18,9 +18,6 @@
 
 package org.apache.hadoop.yarn.util;
 
-import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.Splitter;
-
 import java.io.File;
 import java.io.FilenameFilter;
 import java.net.MalformedURLException;
@@ -34,6 +31,9 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience.Public;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Splitter;
+
 /**
  * A {@link URLClassLoader} for YARN application isolation. Classes from
  * the application JARs are loaded in preference to the parent loader.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/Apps.java

@@ -18,18 +18,24 @@
 
 package org.apache.hadoop.yarn.util;
 
+import static org.apache.hadoop.yarn.util.StringHelper._split;
+import static org.apache.hadoop.yarn.util.StringHelper.join;
+import static org.apache.hadoop.yarn.util.StringHelper.sjoin;
+
 import java.util.Iterator;
 import java.util.Map;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+import org.apache.hadoop.classification.InterfaceAudience.Public;
+import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.util.StringInterner;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 
-import static org.apache.hadoop.yarn.util.StringHelper.*;
-
 /**
  * Yarn application related utilities
  */
+@Private
 public class Apps {
   public static final String APP = "application";
   public static final String ID = "ID";
@@ -98,6 +104,8 @@ public class Apps {
   private static final String SYSTEM_PATH_SEPARATOR =
       System.getProperty("path.separator");
 
+  @Public
+  @Unstable
   public static void addToEnvironment(
       Map<String, String> environment,
       String variable, String value) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ConverterUtils.java

@@ -27,6 +27,7 @@ import java.util.Iterator;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
 import org.apache.hadoop.yarn.api.records.ApplicationId;
@@ -42,6 +43,7 @@ import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
  * from/to 'serializableFormat' to/from hadoop/nativejava data structures.
  *
  */
+@Private
 public class ConverterUtils {
 
   public static final String APPLICATION_PREFIX = "application";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/FSDownload.java

@@ -28,6 +28,7 @@ import java.util.regex.Pattern;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.LimitedPrivate;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileContext;
 import org.apache.hadoop.fs.FileStatus;
@@ -46,6 +47,7 @@ import org.apache.hadoop.yarn.api.records.LocalResourceVisibility;
  * Download a single URL to the local disk.
  *
  */
+@LimitedPrivate({"YARN", "MapReduce"})
 public class FSDownload implements Callable<Path> {
 
   private static final Log LOG = LogFactory.getLog(FSDownload.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/Graph.java

@@ -25,7 +25,9 @@ import java.util.List;
 import java.util.Set;
 
 import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 
+@Private
 public class Graph {
   public class Edge {
     Node from;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/RackResolver.java

@@ -18,12 +18,13 @@
 
 package org.apache.hadoop.yarn.util;
 
-import java.lang.reflect.Constructor;
 import java.util.ArrayList;
 import java.util.List;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeysPublic;
 import org.apache.hadoop.net.CachedDNSToSwitchMapping;
@@ -35,6 +36,7 @@ import org.apache.hadoop.util.ReflectionUtils;
 
 import com.google.common.annotations.VisibleForTesting;
 
+@InterfaceAudience.LimitedPrivate({"YARN", "MAPREDUCE"})
 public class RackResolver {
   private static DNSToSwitchMapping dnsToSwitchMapping;
   private static boolean initCalled = false;
@@ -104,6 +106,7 @@ public class RackResolver {
   /**
    * Only used by tests
    */
+  @Private
   @VisibleForTesting
   static DNSToSwitchMapping getDnsToSwitchMapping(){
     return dnsToSwitchMapping;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ResourceCalculatorPlugin.java

@@ -29,7 +29,7 @@ import org.apache.hadoop.util.Shell;
  * Plugin to calculate resource information on the system.
  *
  */
-@InterfaceAudience.Private
+@InterfaceAudience.LimitedPrivate({"YARN", "MAPREDUCE"})
 @InterfaceStability.Unstable
 public abstract class ResourceCalculatorPlugin extends Configured {
   

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/ResourceCalculatorProcessTree.java

@@ -18,17 +18,19 @@
 
 package org.apache.hadoop.yarn.util;
 
+import java.lang.reflect.Constructor;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configured;
-import org.apache.hadoop.util.ReflectionUtils;
-import java.lang.reflect.Constructor;
 
 /**
  * Interface class to obtain process resource usage
  *
  */
+@Private
 public abstract class ResourceCalculatorProcessTree extends Configured {
   static final Log LOG = LogFactory
       .getLog(ResourceCalculatorProcessTree.class);

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/Self.java

@@ -1,55 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.yarn.util;
-
-/**
- * Some utilities for introspection
- */
-public class Self {
-  private static boolean firstTime = true;
-  private static boolean isUnitTest = false;
-  private static boolean isJUnitTest = false;
-
-  public synchronized static boolean isUnitTest() {
-    detect();
-    return isUnitTest;
-  }
-
-  public synchronized static boolean isJUnitTest() {
-    detect();
-    return isJUnitTest;
-  }
-
-  private synchronized static void detect() {
-    if (!firstTime) {
-      return;
-    }
-    firstTime = false;
-    for (StackTraceElement e : new Throwable().getStackTrace()) {
-      String className = e.getClassName();
-      if (className.startsWith("org.junit")) {
-        isUnitTest = isJUnitTest = true;
-        return;
-      }
-      if (className.startsWith("org.apache.maven.surefire")) {
-        isUnitTest = true;
-        return;
-      }
-    }
-  }
-}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/StringHelper.java

@@ -22,9 +22,12 @@ import com.google.common.base.Joiner;
 import com.google.common.base.Splitter;
 import java.util.regex.Pattern;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+
 /**
  * Common string manipulation helpers
  */
+@Private
 public final class StringHelper {
   // Common joiners to avoid per join creation of joiners
   public static final Joiner SSV_JOINER = Joiner.on(' ');

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/Times.java

@@ -21,6 +21,9 @@ package org.apache.hadoop.yarn.util;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+
+@Private
 public class Times {
   static final ThreadLocal<SimpleDateFormat> dateFormat =
       new ThreadLocal<SimpleDateFormat>() {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/VisualizeStateMachine.java

@@ -21,8 +21,10 @@ import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.yarn.state.StateMachineFactory;
 
+@Private
 public class VisualizeStateMachine {
 
   /**

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/WindowsBasedProcessTree.java

@@ -24,11 +24,12 @@ import java.util.Map;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.util.Shell;
 import org.apache.hadoop.util.Shell.ShellCommandExecutor;
 import org.apache.hadoop.util.StringUtils;
 
-
+@Private
 public class WindowsBasedProcessTree extends ResourceCalculatorProcessTree {
 
   static final Log LOG = LogFactory

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/WindowsResourceCalculatorPlugin.java

@@ -22,10 +22,12 @@ import java.io.IOException;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.util.Shell;
 import org.apache.hadoop.util.Shell.ShellCommandExecutor;
 import org.apache.hadoop.util.StringUtils;
 
+@Private
 public class WindowsResourceCalculatorPlugin extends ResourceCalculatorPlugin {
   
   static final Log LOG = LogFactory

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/package-info.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@InterfaceAudience.Public
+package org.apache.hadoop.yarn.util;
+import org.apache.hadoop.classification.InterfaceAudience;
+

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/BadRequestException.java

@@ -21,6 +21,9 @@ package org.apache.hadoop.yarn.webapp;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response.Status;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public class BadRequestException extends WebApplicationException {
 
   private static final long serialVersionUID = 1L;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/Controller.java

@@ -18,26 +18,28 @@
 
 package org.apache.hadoop.yarn.webapp;
 
-import com.google.common.collect.Maps;
-import com.google.inject.Inject;
-import com.google.inject.Injector;
-import com.google.inject.servlet.RequestScoped;
+import static org.apache.hadoop.yarn.util.StringHelper.join;
+import static org.apache.hadoop.yarn.util.StringHelper.ujoin;
 
 import java.io.PrintWriter;
 import java.util.Map;
+
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import static org.apache.hadoop.yarn.util.StringHelper.*;
-
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.yarn.webapp.view.DefaultPage;
-
 import org.codehaus.jackson.map.ObjectMapper;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.collect.Maps;
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.servlet.RequestScoped;
+
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public abstract class Controller implements Params {
   public static final Logger LOG = LoggerFactory.getLogger(Controller.class);
   static final ObjectMapper jsonMapper = new ObjectMapper();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/DefaultWrapperServlet.java

@@ -27,13 +27,18 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletRequestWrapper;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceAudience.Private;
+
 import com.google.inject.Singleton;
 
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 @Singleton
 public class DefaultWrapperServlet extends HttpServlet {
 
 private static final long serialVersionUID = 1L;
 
+@Private
 public void doGet(HttpServletRequest req, HttpServletResponse resp)
 throws ServletException, IOException {
   RequestDispatcher rd = getServletContext().getNamedDispatcher("default");

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/Dispatcher.java

@@ -18,33 +18,36 @@
 
 package org.apache.hadoop.yarn.webapp;
 
-import static com.google.common.base.Preconditions.*;
-import com.google.common.collect.Iterables;
-import com.google.inject.Inject;
-import com.google.inject.Injector;
-import com.google.inject.Singleton;
+import static com.google.common.base.Preconditions.checkState;
 
 import java.io.IOException;
 import java.util.Timer;
 import java.util.TimerTask;
+
 import javax.servlet.ServletException;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.http.HtmlQuoting;
 import org.apache.hadoop.yarn.webapp.Controller.RequestContext;
 import org.apache.hadoop.yarn.webapp.Router.Dest;
 import org.apache.hadoop.yarn.webapp.view.ErrorPage;
-import org.apache.hadoop.http.HtmlQuoting;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.common.collect.Iterables;
+import com.google.inject.Inject;
+import com.google.inject.Injector;
+import com.google.inject.Singleton;
+
 /**
  * The servlet that dispatch request to various controllers
  * according to the user defined routes in the router.
  */
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 @Singleton
 public class Dispatcher extends HttpServlet {
   private static final long serialVersionUID = 1L;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/GenericExceptionHandler.java

@@ -28,6 +28,7 @@ import javax.ws.rs.ext.Provider;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.security.authorize.AuthorizationException;
 
@@ -37,6 +38,7 @@ import com.google.inject.Singleton;
  * Handle webservices jersey exceptions and create json or xml response
  * with the ExceptionData.
  */
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 @Singleton
 @Provider
 public class GenericExceptionHandler implements ExceptionMapper<Exception> {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/MimeType.java

@@ -18,6 +18,9 @@
 
 package org.apache.hadoop.yarn.webapp;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public interface MimeType {
 
   public static final String TEXT = "text/plain; charset=UTF-8";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/NotFoundException.java

@@ -21,11 +21,14 @@ package org.apache.hadoop.yarn.webapp;
 import javax.ws.rs.WebApplicationException;
 import javax.ws.rs.core.Response.Status;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+
 /*
  * Created our own NotFoundException because com.sun.jersey.api.NotFoundException
  * sets the Response and therefore won't be handled by the GenericExceptionhandler
  * to fill in correct response.
  */
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public class NotFoundException extends WebApplicationException {
 
   private static final long serialVersionUID = 1L;

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/Params.java

@@ -18,11 +18,14 @@
 
 package org.apache.hadoop.yarn.webapp;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+
 /**
  * Public static constants for webapp parameters. Do NOT put any
  * private or application specific constants here as they're part of
  * the API for users of the controllers and views.
  */
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 public interface Params {
   static final String TITLE = "title";
   static final String TITLE_LINK = "title.href";

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/webapp/RemoteExceptionData.java

@@ -22,6 +22,8 @@ import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlRootElement;
 
+import org.apache.hadoop.classification.InterfaceAudience;
+
 /**
  * Contains the exception information from an exception thrown
  * by the web service REST API's.
@@ -31,6 +33,7 @@ import javax.xml.bind.annotation.XmlRootElement;
  *   message - a detailed message explaining the exception
  *
  */
+@InterfaceAudience.LimitedPrivate({"YARN", "MapReduce"})
 @XmlRootElement(name = "RemoteException")
 @XmlAccessorType(XmlAccessType.FIELD)
 public class RemoteExceptionData {