YARN-3579. CommonNodeLabelsManager should support NodeLabel instead of string label name when getting node-to-label/label-to-label mappings. (Sunil G via wangda)

(cherry picked from commit d4f53fc9631d682cd79ba440aefa6750dcc898be)

hadoop-yarn-project/CHANGES.txt

@@ -375,6 +375,9 @@ Release 2.7.1 - UNRELEASED
     YARN-3539. Updated timeline server documentation and marked REST APIs evolving.
     (Steve Loughran via zjshen)
 
+    YARN-3579. CommonNodeLabelsManager should support NodeLabel instead of string 
+    label name when getting node-to-label/label-to-label mappings. (Sunil G via wangda)
+
   OPTIMIZATIONS
 
   BUG FIXES

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

@@ -64,6 +64,8 @@ public class CommonNodeLabelsManager extends AbstractService {
   private static final int MAX_LABEL_LENGTH = 255;
   public static final Set<String> EMPTY_STRING_SET = Collections
       .unmodifiableSet(new HashSet<String>(0));
+  public static final Set<NodeLabel> EMPTY_NODELABEL_SET = Collections
+      .unmodifiableSet(new HashSet<NodeLabel>(0));
   public static final String ANY = "*";
   public static final Set<String> ACCESS_ANY_LABEL_SET = ImmutableSet.of(ANY);
   private static final Pattern LABEL_PATTERN = Pattern
@@ -716,23 +718,53 @@ public class CommonNodeLabelsManager extends AbstractService {
    * @return nodes to labels map
    */
   public Map<NodeId, Set<String>> getNodeLabels() {
+    Map<NodeId, Set<String>> nodeToLabels =
+        generateNodeLabelsInfoPerNode(String.class);
+    return nodeToLabels;
+  }
+
+  /**
+   * Get mapping of nodes to label info
+   *
+   * @return nodes to labels map
+   */
+  public Map<NodeId, Set<NodeLabel>> getNodeLabelsInfo() {
+    Map<NodeId, Set<NodeLabel>> nodeToLabels =
+        generateNodeLabelsInfoPerNode(NodeLabel.class);
+    return nodeToLabels;
+  }
+
+  @SuppressWarnings("unchecked")
+  private <T> Map<NodeId, Set<T>> generateNodeLabelsInfoPerNode(Class<T> type) {
     try {
       readLock.lock();
-      Map<NodeId, Set<String>> nodeToLabels =
-          new HashMap<NodeId, Set<String>>();
+      Map<NodeId, Set<T>> nodeToLabels = new HashMap<>();
       for (Entry<String, Host> entry : nodeCollections.entrySet()) {
         String hostName = entry.getKey();
         Host host = entry.getValue();
         for (NodeId nodeId : host.nms.keySet()) {
-          Set<String> nodeLabels = getLabelsByNode(nodeId);
-          if (nodeLabels == null || nodeLabels.isEmpty()) {
-            continue;
+          if (type.isAssignableFrom(String.class)) {
+            Set<String> nodeLabels = getLabelsByNode(nodeId);
+            if (nodeLabels == null || nodeLabels.isEmpty()) {
+              continue;
+            }
+            nodeToLabels.put(nodeId, (Set<T>) nodeLabels);
+          } else {
+            Set<NodeLabel> nodeLabels = getLabelsInfoByNode(nodeId);
+            if (nodeLabels == null || nodeLabels.isEmpty()) {
+              continue;
+            }
+            nodeToLabels.put(nodeId, (Set<T>) nodeLabels);
           }
-          nodeToLabels.put(nodeId, nodeLabels);
         }
         if (!host.labels.isEmpty()) {
-          nodeToLabels
-              .put(NodeId.newInstance(hostName, WILDCARD_PORT), host.labels);
+          if (type.isAssignableFrom(String.class)) {
+            nodeToLabels.put(NodeId.newInstance(hostName, WILDCARD_PORT),
+                (Set<T>) host.labels);
+          } else {
+            nodeToLabels.put(NodeId.newInstance(hostName, WILDCARD_PORT),
+                (Set<T>) createNodeLabelFromLabelNames(host.labels));
+          }
         }
       }
       return Collections.unmodifiableMap(nodeToLabels);
@@ -741,6 +773,7 @@ public class CommonNodeLabelsManager extends AbstractService {
     }
   }
 
+
   /**
    * Get mapping of labels to nodes for all the labels.
    *
@@ -765,28 +798,72 @@ public class CommonNodeLabelsManager extends AbstractService {
   public Map<String, Set<NodeId>> getLabelsToNodes(Set<String> labels) {
     try {
       readLock.lock();
-      Map<String, Set<NodeId>> labelsToNodes =
-          new HashMap<String, Set<NodeId>>();
-      for (String label : labels) {
-        if(label.equals(NO_LABEL)) {
-          continue;
-        }
-        RMNodeLabel nodeLabelInfo = labelCollections.get(label);
-        if(nodeLabelInfo != null) {
-          Set<NodeId> nodeIds = nodeLabelInfo.getAssociatedNodeIds();
-          if (!nodeIds.isEmpty()) {
-            labelsToNodes.put(label, nodeIds);
-          }
-        } else {
-          LOG.warn("getLabelsToNodes : Label [" + label + "] cannot be found");
-        }
-      }      
+      Map<String, Set<NodeId>> labelsToNodes = getLabelsToNodesMapping(labels,
+          String.class);
+      return Collections.unmodifiableMap(labelsToNodes);
+    } finally {
+      readLock.unlock();
+    }
+  }
+
+
+  /**
+   * Get mapping of labels to nodes for all the labels.
+   *
+   * @return labels to nodes map
+   */
+  public Map<NodeLabel, Set<NodeId>> getLabelsInfoToNodes() {
+    try {
+      readLock.lock();
+      return getLabelsInfoToNodes(labelCollections.keySet());
+    } finally {
+      readLock.unlock();
+    }
+  }
+
+  /**
+   * Get mapping of labels info to nodes for specified set of labels.
+   *
+   * @param nodelabels
+   *          set of nodelabels for which labels to nodes mapping will be
+   *          returned.
+   * @return labels to nodes map
+   */
+  public Map<NodeLabel, Set<NodeId>> getLabelsInfoToNodes(Set<String> labels) {
+    try {
+      readLock.lock();
+      Map<NodeLabel, Set<NodeId>> labelsToNodes = getLabelsToNodesMapping(
+          labels, NodeLabel.class);
       return Collections.unmodifiableMap(labelsToNodes);
     } finally {
       readLock.unlock();
     }
   }
 
+  private <T> Map<T, Set<NodeId>> getLabelsToNodesMapping(Set<String> labels,
+      Class<T> type) {
+    Map<T, Set<NodeId>> labelsToNodes = new HashMap<T, Set<NodeId>>();
+    for (String label : labels) {
+      if (label.equals(NO_LABEL)) {
+        continue;
+      }
+      RMNodeLabel nodeLabelInfo = labelCollections.get(label);
+      if (nodeLabelInfo != null) {
+        Set<NodeId> nodeIds = nodeLabelInfo.getAssociatedNodeIds();
+        if (!nodeIds.isEmpty()) {
+          if (type.isAssignableFrom(String.class)) {
+            labelsToNodes.put(type.cast(label), nodeIds);
+          } else {
+            labelsToNodes.put(type.cast(nodeLabelInfo.getNodeLabel()), nodeIds);
+          }
+        }
+      } else {
+        LOG.warn("getLabelsToNodes : Label [" + label + "] cannot be found");
+      }
+    }
+    return labelsToNodes;
+  }
+
   /**
    * Get existing valid labels in repository
    * 
@@ -914,6 +991,30 @@ public class CommonNodeLabelsManager extends AbstractService {
     }
   }
   
+  private Set<NodeLabel> getLabelsInfoByNode(NodeId nodeId) {
+    Set<String> labels = getLabelsByNode(nodeId, nodeCollections);
+    if (labels.isEmpty()) {
+      return EMPTY_NODELABEL_SET;
+    }
+    Set<NodeLabel> nodeLabels = createNodeLabelFromLabelNames(labels);
+    return nodeLabels;
+  }
+
+  private Set<NodeLabel> createNodeLabelFromLabelNames(Set<String> labels) {
+    Set<NodeLabel> nodeLabels = new HashSet<NodeLabel>();
+    for (String label : labels) {
+      if (label.equals(NO_LABEL)) {
+        continue;
+      }
+      RMNodeLabel rmLabel = labelCollections.get(label);
+      if (rmLabel == null) {
+        continue;
+      }
+      nodeLabels.add(rmLabel.getNodeLabel());
+    }
+    return nodeLabels;
+  }
+
   protected void createNodeIfNonExisted(NodeId nodeId) throws IOException {
     Host host = nodeCollections.get(nodeId.getHost());
     if (null == host) {

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

@@ -25,7 +25,6 @@ import org.apache.commons.lang.StringUtils;
 import org.apache.hadoop.yarn.api.records.NodeId;
 import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.apache.hadoop.yarn.api.records.Resource;
-import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.util.resource.Resources;
 
 public class RMNodeLabel implements Comparable<RMNodeLabel> {
@@ -34,6 +33,7 @@ public class RMNodeLabel implements Comparable<RMNodeLabel> {
   private String labelName;
   private Set<NodeId> nodeIds;
   private boolean exclusive;
+  private NodeLabel nodeLabel;
 
   public RMNodeLabel(NodeLabel nodeLabel) {
     this(nodeLabel.getName(), Resource.newInstance(0, 0), 0,
@@ -52,6 +52,7 @@ public class RMNodeLabel implements Comparable<RMNodeLabel> {
     this.numActiveNMs = activeNMs;
     this.nodeIds = new HashSet<NodeId>();
     this.exclusive = exclusive;
+    this.nodeLabel = NodeLabel.newInstance(labelName, exclusive);
   }
 
   public void addNodeId(NodeId node) {
@@ -100,6 +101,10 @@ public class RMNodeLabel implements Comparable<RMNodeLabel> {
     return new RMNodeLabel(labelName, resource, numActiveNMs, exclusive);
   }
   
+  public NodeLabel getNodeLabel() {
+    return this.nodeLabel;
+  }
+
   @Override
   public int compareTo(RMNodeLabel o) {
     // We should always put empty label entry first after sorting

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/NodeLabelTestBase.java

@@ -26,6 +26,7 @@ import java.util.Set;
 import java.util.Map.Entry;
 
 import org.apache.hadoop.yarn.api.records.NodeId;
+import org.apache.hadoop.yarn.api.records.NodeLabel;
 import org.junit.Assert;
 
 import com.google.common.collect.ImmutableMap;
@@ -41,6 +42,15 @@ public class NodeLabelTestBase {
     }
   }
 
+  public static void assertLabelInfoMapEquals(Map<NodeId, Set<NodeLabel>> m1,
+      ImmutableMap<NodeId, Set<NodeLabel>> m2) {
+    Assert.assertEquals(m1.size(), m2.size());
+    for (NodeId k : m1.keySet()) {
+      Assert.assertTrue(m2.containsKey(k));
+      assertNLCollectionEquals(m1.get(k), m2.get(k));
+    }
+  }
+
   public static void assertLabelsToNodesEquals(Map<String, Set<NodeId>> m1,
       ImmutableMap<String, Set<NodeId>> m2) {
     Assert.assertEquals(m1.size(), m2.size());
@@ -88,6 +98,14 @@ public class NodeLabelTestBase {
     Assert.assertTrue(s1.containsAll(s2));
   }
 
+  public static void assertNLCollectionEquals(Collection<NodeLabel> c1,
+      Collection<NodeLabel> c2) {
+    Set<NodeLabel> s1 = new HashSet<NodeLabel>(c1);
+    Set<NodeLabel> s2 = new HashSet<NodeLabel>(c2);
+    Assert.assertEquals(s1, s2);
+    Assert.assertTrue(s1.containsAll(s2));
+  }
+
   @SuppressWarnings("unchecked")
   public static <E> Set<E> toSet(E... elements) {
     Set<E> set = Sets.newHashSet(elements);
@@ -105,4 +123,16 @@ public class NodeLabelTestBase {
       return NodeId.newInstance(str, CommonNodeLabelsManager.WILDCARD_PORT);
     }
   }
+
+  public static void assertLabelsInfoToNodesEquals(
+      Map<NodeLabel, Set<NodeId>> m1, ImmutableMap<NodeLabel, Set<NodeId>> m2) {
+    Assert.assertEquals(m1.size(), m2.size());
+    for (NodeLabel k : m1.keySet()) {
+      Assert.assertTrue(m2.containsKey(k));
+      Set<NodeId> s1 = new HashSet<NodeId>(m1.get(k));
+      Set<NodeId> s2 = new HashSet<NodeId>(m2.get(k));
+      Assert.assertEquals(s1, s2);
+      Assert.assertTrue(s1.containsAll(s2));
+    }
+  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/nodelabels/TestCommonNodeLabelsManager.java

@@ -579,4 +579,26 @@ public class TestCommonNodeLabelsManager extends NodeLabelTestBase {
         labelsByNode);
     Assert.assertTrue(labelsByNode.contains("p1"));
   }
+
+  @Test(timeout = 5000)
+  public void testLabelsInfoToNodes() throws IOException {
+    mgr.addToCluserNodeLabels(Arrays.asList(NodeLabel.newInstance("p1", false),
+        NodeLabel.newInstance("p2", true), NodeLabel.newInstance("p3", true)));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p1")));
+    Map<NodeLabel, Set<NodeId>> labelsToNodes = mgr.getLabelsInfoToNodes();
+    assertLabelsInfoToNodesEquals(labelsToNodes, ImmutableMap.of(
+        NodeLabel.newInstance("p1", false), toSet(toNodeId("n1"))));
+  }
+
+  @Test(timeout = 5000)
+  public void testGetNodeLabelsInfo() throws IOException {
+    mgr.addToCluserNodeLabels(Arrays.asList(NodeLabel.newInstance("p1", false),
+        NodeLabel.newInstance("p2", true), NodeLabel.newInstance("p3", false)));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n1"), toSet("p2")));
+    mgr.addLabelsToNode(ImmutableMap.of(toNodeId("n2"), toSet("p3")));
+
+    assertLabelInfoMapEquals(mgr.getNodeLabelsInfo(), ImmutableMap.of(
+        toNodeId("n1"), toSet(NodeLabel.newInstance("p2", true)),
+        toNodeId("n2"), toSet(NodeLabel.newInstance("p3", false))));
+  }
 }