hadoop RouterNamenodeProtocol 源码

haddop RouterNamenodeProtocol 代码

文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterNamenodeProtocol.java

/**
 * 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.federation.router;

import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
import org.apache.hadoop.hdfs.server.namenode.CheckpointSignature;
import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory;
import org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport;
import org.apache.hadoop.hdfs.server.protocol.NamenodeCommand;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;

/**
 * Module that implements all the RPC calls in {@link NamenodeProtocol} in the
 * {@link RouterRpcServer}.
 */
public class RouterNamenodeProtocol implements NamenodeProtocol {

  /** RPC server to receive client calls. */
  private final RouterRpcServer rpcServer;
  /** RPC clients to connect to the Namenodes. */
  private final RouterRpcClient rpcClient;


  public RouterNamenodeProtocol(RouterRpcServer server) {
    this.rpcServer = server;
    this.rpcClient =  this.rpcServer.getRPCClient();
  }

  @Override
  public BlocksWithLocations getBlocks(DatanodeInfo datanode, long size,
      long minBlockSize, long hotBlockTimeInterval) throws IOException {
    rpcServer.checkOperation(OperationCategory.READ);

    // Get the namespace where the datanode is located
    Map<String, DatanodeStorageReport[]> map =
        rpcServer.getDatanodeStorageReportMap(DatanodeReportType.ALL);
    String nsId = null;
    for (Entry<String, DatanodeStorageReport[]> entry : map.entrySet()) {
      DatanodeStorageReport[] dns = entry.getValue();
      for (DatanodeStorageReport dn : dns) {
        DatanodeInfo dnInfo = dn.getDatanodeInfo();
        if (dnInfo.getDatanodeUuid().equals(datanode.getDatanodeUuid())) {
          nsId = entry.getKey();
          break;
        }
      }
      // Break the loop if already found
      if (nsId != null) {
        break;
      }
    }

    // Forward to the proper namenode
    if (nsId != null) {
      RemoteMethod method = new RemoteMethod(
          NamenodeProtocol.class, "getBlocks", new Class<?>[]
          {DatanodeInfo.class, long.class, long.class, long.class},
          datanode, size, minBlockSize, hotBlockTimeInterval);
      return rpcClient.invokeSingle(nsId, method, BlocksWithLocations.class);
    }
    return null;
  }

  @Override
  public ExportedBlockKeys getBlockKeys() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ);

    RemoteMethod method =
        new RemoteMethod(NamenodeProtocol.class, "getBlockKeys");
    return rpcServer.invokeAtAvailableNs(method, ExportedBlockKeys.class);
  }

  @Override
  public long getTransactionID() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ);

    RemoteMethod method =
        new RemoteMethod(NamenodeProtocol.class, "getTransactionID");
    return rpcServer.invokeAtAvailableNs(method, long.class);
  }

  @Override
  public long getMostRecentCheckpointTxId() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ);

    RemoteMethod method =
        new RemoteMethod(NamenodeProtocol.class, "getMostRecentCheckpointTxId");
    return rpcServer.invokeAtAvailableNs(method, long.class);
  }

  @Override
  public CheckpointSignature rollEditLog() throws IOException {
    rpcServer.checkOperation(OperationCategory.WRITE, false);
    return null;
  }

  @Override
  public NamespaceInfo versionRequest() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ);

    RemoteMethod method =
        new RemoteMethod(NamenodeProtocol.class, "versionRequest");
    return rpcServer.invokeAtAvailableNs(method, NamespaceInfo.class);
  }

  @Override
  public void errorReport(NamenodeRegistration registration, int errorCode,
      String msg) throws IOException {
    rpcServer.checkOperation(OperationCategory.UNCHECKED, false);
  }

  @Override
  public NamenodeRegistration registerSubordinateNamenode(
      NamenodeRegistration registration) throws IOException {
    rpcServer.checkOperation(OperationCategory.WRITE, false);
    return null;
  }

  @Override
  public NamenodeCommand startCheckpoint(NamenodeRegistration registration)
      throws IOException {
    rpcServer.checkOperation(OperationCategory.WRITE, false);
    return null;
  }

  @Override
  public void endCheckpoint(NamenodeRegistration registration,
      CheckpointSignature sig) throws IOException {
    rpcServer.checkOperation(OperationCategory.WRITE, false);
  }

  @Override
  public RemoteEditLogManifest getEditLogManifest(long sinceTxId)
      throws IOException {
    rpcServer.checkOperation(OperationCategory.READ, false);
    return null;
  }

  @Override
  public boolean isUpgradeFinalized() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ, false);
    return false;
  }

  @Override
  public boolean isRollingUpgrade() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ, false);
    return false;
  }

  @Override
  public Long getNextSPSPath() throws IOException {
    rpcServer.checkOperation(OperationCategory.READ, false);
    // not supported
    return null;
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop ConnectionContext 源码

hadoop ConnectionManager 源码

hadoop ConnectionNullException 源码

hadoop ConnectionPool 源码

hadoop ConnectionPoolId 源码

hadoop DFSRouter 源码

hadoop ErasureCoding 源码

hadoop FederationConnectionId 源码

hadoop FederationUtil 源码

hadoop IsRouterActiveServlet 源码