Merge r1188282 and r1188286 from trunk for HDFS-2489.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23-PB@1229489 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -19,6 +19,9 @@ Release 0.23-PB - Unreleased
 
     HDFS-2480. Separate datatypes for NamenodeProtocol. (suresh)
 
+    HDFS-2489. Move Finalize and Register to separate file out of
+    DatanodeCommand.java. (suresh)
+
 Release 0.23.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java

@@ -60,6 +60,7 @@ import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
 import org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException;
+import org.apache.hadoop.hdfs.server.protocol.RegisterCommand;
 import org.apache.hadoop.hdfs.util.CyclicIteration;
 import org.apache.hadoop.ipc.Server;
 import org.apache.hadoop.net.CachedDNSToSwitchMapping;
@@ -862,7 +863,7 @@ public class DatanodeManager {
         try {
           nodeinfo = getDatanode(nodeReg);
         } catch(UnregisteredNodeException e) {
-          return new DatanodeCommand[]{DatanodeCommand.REGISTER};
+          return new DatanodeCommand[]{RegisterCommand.REGISTER};
         }
         
         // Check if this datanode should actually be shutdown instead. 
@@ -872,7 +873,7 @@ public class DatanodeManager {
         }
          
         if (nodeinfo == null || !nodeinfo.isAlive) {
-          return new DatanodeCommand[]{DatanodeCommand.REGISTER};
+          return new DatanodeCommand[]{RegisterCommand.REGISTER};
         }
 
         heartbeatManager.updateHeartbeat(nodeinfo, capacity, dfsUsed,

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPOfferService.java

@@ -46,6 +46,7 @@ import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
 import org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException;
+import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
 import org.apache.hadoop.hdfs.server.protocol.KeyUpdateCommand;
 import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
 import org.apache.hadoop.hdfs.server.protocol.UpgradeCommand;
@@ -699,7 +700,7 @@ class BPOfferService implements Runnable {
       }
       break;
     case DatanodeProtocol.DNA_FINALIZE:
-      String bp = ((DatanodeCommand.Finalize) cmd).getBlockPoolId(); 
+      String bp = ((FinalizeCommand) cmd).getBlockPoolId(); 
       assert getBlockPoolId().equals(bp) :
         "BP " + getBlockPoolId() + " received DNA_FINALIZE " +
         "for other block pool " + bp;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java

@@ -70,6 +70,7 @@ import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
+import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
@@ -799,7 +800,7 @@ class NameNodeRpcServer implements NamenodeProtocols {
 
     namesystem.getBlockManager().processReport(nodeReg, poolId, blist);
     if (nn.getFSImage().isUpgradeFinalized())
-      return new DatanodeCommand.Finalize(poolId);
+      return new FinalizeCommand(poolId);
     return null;
   }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/DatanodeCommand.java

@@ -17,17 +17,9 @@
  */
 package org.apache.hadoop.hdfs.server.protocol;
 
-import java.io.DataInput;
+import org.apache.avro.reflect.Union;
-import java.io.DataOutput;
-import java.io.IOException;
-
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
-import org.apache.hadoop.io.Writable;
-import org.apache.hadoop.io.WritableFactory;
-import org.apache.hadoop.io.WritableFactories;
-import org.apache.hadoop.io.WritableUtils;
-import org.apache.avro.reflect.Union;
 
 /**
  * Base class for data-node command.
@@ -36,55 +28,13 @@ import org.apache.avro.reflect.Union;
 
 // Declare subclasses for Avro's denormalized representation
 @Union({Void.class,
-      DatanodeCommand.Register.class, DatanodeCommand.Finalize.class,
+      RegisterCommand.class, FinalizeCommand.class,
       BlockCommand.class, UpgradeCommand.class,
       BlockRecoveryCommand.class, KeyUpdateCommand.class})
 
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public abstract class DatanodeCommand extends ServerCommand {
-  static class Register extends DatanodeCommand {
-    private Register() {super(DatanodeProtocol.DNA_REGISTER);}
-    public void readFields(DataInput in) {}
-    public void write(DataOutput out) {}
-  }
-
-  public static class Finalize extends DatanodeCommand {
-    String blockPoolId;
-    private Finalize() {
-      super(DatanodeProtocol.DNA_FINALIZE);
-    }
-    
-    public Finalize(String bpid) {
-      super(DatanodeProtocol.DNA_FINALIZE);
-      blockPoolId = bpid;
-    }
-    
-    public String getBlockPoolId() {
-      return blockPoolId;
-    }
-    
-    public void readFields(DataInput in) throws IOException {
-      blockPoolId = WritableUtils.readString(in);
-    }
-    public void write(DataOutput out) throws IOException {
-      WritableUtils.writeString(out, blockPoolId);
-    }
-  }
-
-  static {                                      // register a ctor
-    WritableFactories.setFactory(Register.class,
-        new WritableFactory() {
-          public Writable newInstance() {return new Register();}
-        });
-    WritableFactories.setFactory(Finalize.class,
-        new WritableFactory() {
-          public Writable newInstance() {return new Finalize();}
-        });
-  }
-
-  public static final DatanodeCommand REGISTER = new Register();
-  
   public DatanodeCommand() {
     super();
   }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/FinalizeCommand.java

@@ -0,0 +1,68 @@
+/**
+ * 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.hdfs.server.protocol;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.io.Writable;
+import org.apache.hadoop.io.WritableFactories;
+import org.apache.hadoop.io.WritableFactory;
+import org.apache.hadoop.io.WritableUtils;
+
+/**
+ * A BlockCommand is an instruction to a datanode to register with the namenode.
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+public class FinalizeCommand extends DatanodeCommand {
+  // /////////////////////////////////////////
+  // Writable
+  // /////////////////////////////////////////
+  static { // register a ctor
+    WritableFactories.setFactory(FinalizeCommand.class, new WritableFactory() {
+      public Writable newInstance() {
+        return new FinalizeCommand();
+      }
+    });
+  }
+  
+  String blockPoolId;
+  private FinalizeCommand() {
+    super(DatanodeProtocol.DNA_FINALIZE);
+  }
+  
+  public FinalizeCommand(String bpid) {
+    super(DatanodeProtocol.DNA_FINALIZE);
+    blockPoolId = bpid;
+  }
+  
+  public String getBlockPoolId() {
+    return blockPoolId;
+  }
+  
+  public void readFields(DataInput in) throws IOException {
+    blockPoolId = WritableUtils.readString(in);
+  }
+  public void write(DataOutput out) throws IOException {
+    WritableUtils.writeString(out, blockPoolId);
+  }
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/RegisterCommand.java

@@ -0,0 +1,57 @@
+/**
+ * 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.hdfs.server.protocol;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
+import org.apache.hadoop.io.Writable;
+import org.apache.hadoop.io.WritableFactories;
+import org.apache.hadoop.io.WritableFactory;
+
+/**
+ * A BlockCommand is an instruction to a datanode to register with the namenode.
+ */
+@InterfaceAudience.Private
+@InterfaceStability.Evolving
+public class RegisterCommand extends DatanodeCommand {
+  // /////////////////////////////////////////
+  // Writable
+  // /////////////////////////////////////////
+  static { // register a ctor
+    WritableFactories.setFactory(RegisterCommand.class, new WritableFactory() {
+      public Writable newInstance() {
+        return new RegisterCommand();
+      }
+    });
+  }
+  
+  public static final DatanodeCommand REGISTER = new RegisterCommand();
+
+  public RegisterCommand() {
+    super(DatanodeProtocol.DNA_REGISTER);
+  }
+
+  @Override
+  public void readFields(DataInput in) { }
+ 
+  @Override
+  public void write(DataOutput out) { }
+}

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestDeadDatanode.java

@@ -36,6 +36,7 @@ import org.apache.hadoop.hdfs.server.datanode.DataNodeTestUtils;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
 import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
+import org.apache.hadoop.hdfs.server.protocol.RegisterCommand;
 import org.junit.After;
 import org.junit.Test;
 
@@ -128,7 +129,7 @@ public class TestDeadDatanode {
     // that asks datanode to register again
     DatanodeCommand[] cmd = dnp.sendHeartbeat(reg, 0, 0, 0, 0, 0, 0, 0);
     Assert.assertEquals(1, cmd.length);
-    Assert.assertEquals(cmd[0].getAction(), DatanodeCommand.REGISTER
+    Assert.assertEquals(cmd[0].getAction(), RegisterCommand.REGISTER
         .getAction());
   }
 }