HDFS-2348. Support getContentSummary and getFileChecksum in webhdfs.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1177905 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -19,6 +19,9 @@ Trunk (unreleased changes)
     HDFS-2340. Support getFileBlockLocations and getDelegationToken in webhdfs.
     (szetszwo)
 
+    HDFS-2348. Support getContentSummary and getFileChecksum in webhdfs.
+    (szetszwo)
+
   IMPROVEMENTS
 
     HADOOP-7524 Change RPC to allow multiple protocols including multuple 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/web/resources/DatanodeWebHdfsMethods.java

@@ -46,10 +46,12 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CreateFlag;
 import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
 import org.apache.hadoop.hdfs.DFSClient;
 import org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream;
 import org.apache.hadoop.hdfs.server.datanode.DataNode;
 import org.apache.hadoop.hdfs.server.namenode.NameNode;
+import org.apache.hadoop.hdfs.web.JsonUtil;
 import org.apache.hadoop.hdfs.web.ParamFilter;
 import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.hdfs.web.resources.BlockSizeParam;
@@ -219,13 +221,13 @@ public class DatanodeWebHdfsMethods {
 
     final String fullpath = path.getAbsolutePath();
     final DataNode datanode = (DataNode)context.getAttribute("datanode");
+    final Configuration conf = new Configuration(datanode.getConf());
+    final InetSocketAddress nnRpcAddr = NameNode.getAddress(conf);
+    final DFSClient dfsclient = new DFSClient(nnRpcAddr, conf);
 
     switch(op.getValue()) {
     case OPEN:
     {
-      final Configuration conf = new Configuration(datanode.getConf());
-      final InetSocketAddress nnRpcAddr = NameNode.getAddress(conf);
-      final DFSClient dfsclient = new DFSClient(nnRpcAddr, conf);
       final int b = bufferSize.getValue(conf);
       final DFSDataInputStream in = new DFSClient.DFSDataInputStream(
           dfsclient.open(fullpath, b, true));
@@ -244,6 +246,12 @@ public class DatanodeWebHdfsMethods {
       };
       return Response.ok(streaming).type(MediaType.APPLICATION_OCTET_STREAM).build();
     }
+    case GETFILECHECKSUM:
+    {
+      final MD5MD5CRC32FileChecksum checksum = dfsclient.getFileChecksum(fullpath);
+      final String js = JsonUtil.toJsonString(checksum);
+      return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
+    }
     default:
       throw new UnsupportedOperationException(op + " is not supported");
     }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java

@@ -46,6 +46,7 @@ import javax.ws.rs.core.StreamingOutput;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.fs.ContentSummary;
 import org.apache.hadoop.fs.Options;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.DirectoryListing;
@@ -112,7 +113,9 @@ public class NamenodeWebHdfsMethods {
   private static DatanodeInfo chooseDatanode(final NameNode namenode,
       final String path, final HttpOpParam.Op op, final long openOffset
       ) throws IOException {
-    if (op == GetOpParam.Op.OPEN || op == PostOpParam.Op.APPEND) {
+    if (op == GetOpParam.Op.OPEN
+        || op == GetOpParam.Op.GETFILECHECKSUM
+        || op == PostOpParam.Op.APPEND) {
       final NamenodeProtocols np = namenode.getRpcServer();
       final HdfsFileStatus status = np.getFileInfo(path);
       final long len = status.getLen();
@@ -431,6 +434,18 @@ public class NamenodeWebHdfsMethods {
       final StreamingOutput streaming = getListingStream(np, fullpath);
       return Response.ok(streaming).type(MediaType.APPLICATION_JSON).build();
     }
+    case GETCONTENTSUMMARY:
+    {
+      final ContentSummary contentsummary = np.getContentSummary(fullpath);
+      final String js = JsonUtil.toJsonString(contentsummary);
+      return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
+    }
+    case GETFILECHECKSUM:
+    {
+      final URI uri = redirectURI(namenode, ugi, delegation, fullpath,
+          op.getValue(), -1L);
+      return Response.temporaryRedirect(uri).build();
+    }
     case GETDELEGATIONTOKEN:
     {
       final Token<? extends TokenIdentifier> token = generateDelegationToken(

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/JsonUtil.java

@@ -17,6 +17,8 @@
  */
 package org.apache.hadoop.hdfs.web;
 
+import java.io.ByteArrayInputStream;
+import java.io.DataInputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -24,6 +26,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
 
+import org.apache.hadoop.fs.ContentSummary;
+import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@@ -34,6 +38,7 @@ import org.apache.hadoop.hdfs.protocol.LocatedBlock;
 import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
 import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
 import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
+import org.apache.hadoop.io.MD5Hash;
 import org.apache.hadoop.ipc.RemoteException;
 import org.apache.hadoop.security.token.Token;
 import org.apache.hadoop.security.token.TokenIdentifier;
@@ -398,4 +403,73 @@ public class JsonUtil {
     return new LocatedBlocks(fileLength, isUnderConstruction, locatedBlocks,
         lastLocatedBlock, isLastBlockComplete);
   }
+
+  /** Convert a ContentSummary to a Json string. */
+  public static String toJsonString(final ContentSummary contentsummary
+      ) throws IOException {
+    if (contentsummary == null) {
+      return null;
+    }
+
+    final Map<String, Object> m = jsonMap.get();
+    m.put("length", contentsummary.getLength());
+    m.put("fileCount", contentsummary.getFileCount());
+    m.put("directoryCount", contentsummary.getDirectoryCount());
+    m.put("quota", contentsummary.getQuota());
+    m.put("spaceConsumed", contentsummary.getSpaceConsumed());
+    m.put("spaceQuota", contentsummary.getSpaceQuota());
+    return JSON.toString(m);
+  }
+
+  /** Convert a Json map to a ContentSummary. */
+  public static ContentSummary toContentSummary(final Map<String, Object> m
+      ) throws IOException {
+    if (m == null) {
+      return null;
+    }
+
+    final long length = (Long)m.get("length");
+    final long fileCount = (Long)m.get("fileCount");
+    final long directoryCount = (Long)m.get("directoryCount");
+    final long quota = (Long)m.get("quota");
+    final long spaceConsumed = (Long)m.get("spaceConsumed");
+    final long spaceQuota = (Long)m.get("spaceQuota");
+
+    return new ContentSummary(length, fileCount, directoryCount,
+        quota, spaceConsumed, spaceQuota);
+  }
+
+  /** Convert a MD5MD5CRC32FileChecksum to a Json string. */
+  public static String toJsonString(final MD5MD5CRC32FileChecksum checksum
+      ) throws IOException {
+    if (checksum == null) {
+      return null;
+    }
+
+    final Map<String, Object> m = jsonMap.get();
+    final byte[] bytes = checksum.getBytes();
+    final DataInputStream in = new DataInputStream(new ByteArrayInputStream(bytes));
+    final int bytesPerCRC = in.readInt();
+    final long crcPerBlock = in.readLong();
+    final MD5Hash md5 = MD5Hash.read(in);
+    m.put("bytesPerCRC", bytesPerCRC);
+    m.put("crcPerBlock", crcPerBlock);
+    m.put("md5", "" + md5);
+    return JSON.toString(m);
+  }
+
+  /** Convert a Json map to a MD5MD5CRC32FileChecksum. */
+  public static MD5MD5CRC32FileChecksum toMD5MD5CRC32FileChecksum(
+      final Map<String, Object> m) throws IOException {
+    if (m == null) {
+      return null;
+    }
+
+    final int bytesPerCRC = (int)(long)(Long)m.get("bytesPerCRC");
+    final long crcPerBlock = (Long)m.get("crcPerBlock");
+    final String md5 = (String)m.get("md5");
+
+    return new MD5MD5CRC32FileChecksum(bytesPerCRC, crcPerBlock,
+        new MD5Hash(md5));
+  }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/WebHdfsFileSystem.java

@@ -33,10 +33,12 @@ import java.util.Map;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.BlockLocation;
+import org.apache.hadoop.fs.ContentSummary;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileAlreadyExistsException;
 import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
 import org.apache.hadoop.fs.Options;
 import org.apache.hadoop.fs.ParentNotDirectoryException;
 import org.apache.hadoop.fs.Path;
@@ -449,4 +451,23 @@ public class WebHdfsFileSystem extends HftpFileSystem {
         new LengthParam(length));
     return DFSUtil.locatedBlocks2Locations(JsonUtil.toLocatedBlocks(m));
   }
+
+  @Override
+  public ContentSummary getContentSummary(final Path p) throws IOException {
+    statistics.incrementReadOps(1);
+
+    final HttpOpParam.Op op = GetOpParam.Op.GETCONTENTSUMMARY;
+    final Map<String, Object> m = run(op, p);
+    return JsonUtil.toContentSummary(m);
+  }
+
+  @Override
+  public MD5MD5CRC32FileChecksum getFileChecksum(final Path p
+      ) throws IOException {
+    statistics.incrementReadOps(1);
+  
+    final HttpOpParam.Op op = GetOpParam.Op.GETFILECHECKSUM;
+    final Map<String, Object> m = run(op, p);
+    return JsonUtil.toMD5MD5CRC32FileChecksum(m);
+  }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/GetOpParam.java

@@ -28,6 +28,8 @@ public class GetOpParam extends HttpOpParam<GetOpParam.Op> {
 
     GETFILESTATUS(HttpURLConnection.HTTP_OK),
     LISTSTATUS(HttpURLConnection.HTTP_OK),
+    GETCONTENTSUMMARY(HttpURLConnection.HTTP_OK),
+    GETFILECHECKSUM(HttpURLConnection.HTTP_OK),
 
     GETDELEGATIONTOKEN(HttpURLConnection.HTTP_OK),
 

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDistributedFileSystem.java

@@ -26,6 +26,7 @@ import static org.junit.Assert.fail;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URI;
+import java.security.PrivilegedExceptionAction;
 import java.util.Random;
 
 import org.apache.commons.logging.impl.Log4JLogger;
@@ -37,6 +38,7 @@ import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
+import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.log4j.Level;
 import org.junit.Test;
@@ -399,15 +401,40 @@ public class TestDistributedFileSystem {
     RAN.setSeed(seed);
 
     final Configuration conf = getTestConfiguration();
+    conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);
     conf.set(DFSConfigKeys.DFS_DATANODE_HOST_NAME_KEY, "localhost");
 
     final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
     final FileSystem hdfs = cluster.getFileSystem();
-    final String hftpuri = "hftp://" + conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY);
+
+    final String nnAddr = conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY);
+    final UserGroupInformation current = UserGroupInformation.getCurrentUser();
+    final UserGroupInformation ugi = UserGroupInformation.createUserForTesting(
+        current.getShortUserName() + "x", new String[]{"user"});
+    
+    //hftp
+    final String hftpuri = "hftp://" + nnAddr;
     System.out.println("hftpuri=" + hftpuri);
-    final FileSystem hftp = new Path(hftpuri).getFileSystem(conf);
+    final FileSystem hftp = ugi.doAs(
+        new PrivilegedExceptionAction<FileSystem>() {
+      @Override
+      public FileSystem run() throws Exception {
+        return new Path(hftpuri).getFileSystem(conf);
+      }
+    });
+
+    //webhdfs
+    final String webhdfsuri = WebHdfsFileSystem.SCHEME  + "://" + nnAddr;
+    System.out.println("webhdfsuri=" + webhdfsuri);
+    final FileSystem webhdfs = ugi.doAs(
+        new PrivilegedExceptionAction<FileSystem>() {
+      @Override
+      public FileSystem run() throws Exception {
+        return new Path(webhdfsuri).getFileSystem(conf);
+      }
+    });
 
-    final String dir = "/filechecksum";
+    final Path dir = new Path("/filechecksum");
     final int block_size = 1024;
     final int buffer_size = conf.getInt("io.file.buffer.size", 4096);
     conf.setInt(DFSConfigKeys.DFS_BYTES_PER_CHECKSUM_KEY, 512);
@@ -431,7 +458,8 @@ public class TestDistributedFileSystem {
       //compute checksum
       final FileChecksum hdfsfoocs = hdfs.getFileChecksum(foo);
       System.out.println("hdfsfoocs=" + hdfsfoocs);
-      
+
+      //hftp
       final FileChecksum hftpfoocs = hftp.getFileChecksum(foo);
       System.out.println("hftpfoocs=" + hftpfoocs);
 
@@ -439,6 +467,14 @@ public class TestDistributedFileSystem {
       final FileChecksum qfoocs = hftp.getFileChecksum(qualified);
       System.out.println("qfoocs=" + qfoocs);
 
+      //webhdfs
+      final FileChecksum webhdfsfoocs = webhdfs.getFileChecksum(foo);
+      System.out.println("webhdfsfoocs=" + webhdfsfoocs);
+
+      final Path webhdfsqualified = new Path(webhdfsuri + dir, "foo" + n);
+      final FileChecksum webhdfs_qfoocs = webhdfs.getFileChecksum(webhdfsqualified);
+      System.out.println("webhdfs_qfoocs=" + webhdfs_qfoocs);
+
       //write another file
       final Path bar = new Path(dir, "bar" + n);
       {
@@ -454,24 +490,40 @@ public class TestDistributedFileSystem {
         assertEquals(hdfsfoocs.hashCode(), barhashcode);
         assertEquals(hdfsfoocs, barcs);
 
+        //hftp
         assertEquals(hftpfoocs.hashCode(), barhashcode);
         assertEquals(hftpfoocs, barcs);
 
         assertEquals(qfoocs.hashCode(), barhashcode);
         assertEquals(qfoocs, barcs);
+
+        //webhdfs
+        assertEquals(webhdfsfoocs.hashCode(), barhashcode);
+        assertEquals(webhdfsfoocs, barcs);
+
+        assertEquals(webhdfs_qfoocs.hashCode(), barhashcode);
+        assertEquals(webhdfs_qfoocs, barcs);
       }
 
+      hdfs.setPermission(dir, new FsPermission((short)0));
       { //test permission error on hftp 
-        hdfs.setPermission(new Path(dir), new FsPermission((short)0));
         try {
-          final String username = UserGroupInformation.getCurrentUser().getShortUserName() + "1";
-          final HftpFileSystem hftp2 = cluster.getHftpFileSystemAs(username, conf, 0, "somegroup");
-          hftp2.getFileChecksum(qualified);
+          hftp.getFileChecksum(qualified);
+          fail();
+        } catch(IOException ioe) {
+          FileSystem.LOG.info("GOOD: getting an exception", ioe);
+        }
+      }
+
+      { //test permission error on webhdfs 
+        try {
+          webhdfs.getFileChecksum(webhdfsqualified);
           fail();
         } catch(IOException ioe) {
           FileSystem.LOG.info("GOOD: getting an exception", ioe);
         }
       }
+      hdfs.setPermission(dir, new FsPermission((short)0777));
     }
     cluster.shutdown();
   }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java

@@ -34,6 +34,7 @@ import org.apache.hadoop.hdfs.protocol.NSQuotaExceededException;
 import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
 import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil;
 import org.apache.hadoop.hdfs.tools.DFSAdmin;
+import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.junit.Test;
@@ -770,6 +771,11 @@ public class TestQuota {
     }
   }
 
+  private static void checkContentSummary(final ContentSummary expected,
+      final ContentSummary computed) {
+    assertEquals(expected.toString(), computed.toString());
+  }
+
   /**
    * Violate a space quota using files of size < 1 block. Test that block
    * allocation conservatively assumes that for quota checking the entire
@@ -781,12 +787,18 @@ public class TestQuota {
     Configuration conf = new HdfsConfiguration();
     final int BLOCK_SIZE = 6 * 1024;
     conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
+    conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);
     MiniDFSCluster cluster = 
       new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
     cluster.waitActive();
     FileSystem fs = cluster.getFileSystem();
     DFSAdmin admin = new DFSAdmin(conf);
-    
+
+    final String nnAddr = conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY);
+    final String webhdfsuri = WebHdfsFileSystem.SCHEME  + "://" + nnAddr;
+    System.out.println("webhdfsuri=" + webhdfsuri);
+    final FileSystem webhdfs = new Path(webhdfsuri).getFileSystem(conf);
+
     try {
       Path dir = new Path("/test");
       Path file1 = new Path("/test/test1");
@@ -806,6 +818,7 @@ public class TestQuota {
       DFSTestUtil.createFile(fs, file1, FILE_SIZE, (short) 3, 1L);
       DFSTestUtil.waitReplication(fs, file1, (short) 3);
       c = fs.getContentSummary(dir);
+      checkContentSummary(c, webhdfs.getContentSummary(dir));
       assertEquals("Quota is half consumed", QUOTA_SIZE / 2,
                    c.getSpaceConsumed());
 
@@ -836,12 +849,18 @@ public class TestQuota {
     Configuration conf = new HdfsConfiguration();
     final int BLOCK_SIZE = 6 * 1024;
     conf.setInt(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, BLOCK_SIZE);
+    conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);
     MiniDFSCluster cluster = 
       new MiniDFSCluster.Builder(conf).numDataNodes(3).build();
     cluster.waitActive();
     FileSystem fs = cluster.getFileSystem();
     DFSAdmin admin = new DFSAdmin(conf);
 
+    final String nnAddr = conf.get(DFSConfigKeys.DFS_NAMENODE_HTTP_ADDRESS_KEY);
+    final String webhdfsuri = WebHdfsFileSystem.SCHEME  + "://" + nnAddr;
+    System.out.println("webhdfsuri=" + webhdfsuri);
+    final FileSystem webhdfs = new Path(webhdfsuri).getFileSystem(conf);
+    
     try {
       
       //Test for deafult NameSpace Quota
@@ -882,6 +901,7 @@ public class TestQuota {
 
       // Should account for all 59 files (almost QUOTA_SIZE)
       c = fs.getContentSummary(dir);
+      checkContentSummary(c, webhdfs.getContentSummary(dir));
       assertEquals("Invalid space consumed", 59 * FILE_SIZE * 3,
           c.getSpaceConsumed());
       assertEquals("Invalid space consumed", QUOTA_SIZE - (59 * FILE_SIZE * 3),