hadoop DatanodeRegistration 源码

haddop DatanodeRegistration 代码

文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/DatanodeRegistration.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.protocol;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys;
import org.apache.hadoop.hdfs.server.common.Storage;
import org.apache.hadoop.hdfs.server.common.StorageInfo;

import org.apache.hadoop.classification.VisibleForTesting;

/** 
 * DatanodeRegistration class contains all information the name-node needs
 * to identify and verify a data-node when it contacts the name-node.
 * This information is sent by data-node with each communication request.
 */
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class DatanodeRegistration extends DatanodeID
    implements NodeRegistration {

  private final StorageInfo storageInfo;
  private ExportedBlockKeys exportedKeys;
  private final String softwareVersion;
  private NamespaceInfo nsInfo;

  @VisibleForTesting
  public DatanodeRegistration(String uuid, DatanodeRegistration dnr) {
    this(new DatanodeID(uuid, dnr),
         dnr.getStorageInfo(),
         dnr.getExportedKeys(),
         dnr.getSoftwareVersion());
  }

  public DatanodeRegistration(DatanodeID dn, StorageInfo info,
      ExportedBlockKeys keys, String softwareVersion) {
    super(dn);
    this.storageInfo = info;
    this.exportedKeys = keys;
    this.softwareVersion = softwareVersion;
  }

  public StorageInfo getStorageInfo() {
    return storageInfo;
  }

  public void setExportedKeys(ExportedBlockKeys keys) {
    this.exportedKeys = keys;
  }

  public ExportedBlockKeys getExportedKeys() {
    return exportedKeys;
  }
  
  public String getSoftwareVersion() {
    return softwareVersion;
  }

  @Override // NodeRegistration
  public int getVersion() {
    return storageInfo.getLayoutVersion();
  }

  public void setNamespaceInfo(NamespaceInfo nsInfo) {
    this.nsInfo = nsInfo;
  }

  public NamespaceInfo getNamespaceInfo() {
    return nsInfo;
  }
  
  @Override // NodeRegistration
  public String getRegistrationID() {
    return Storage.getRegistrationID(storageInfo);
  }

  @Override // NodeRegistration
  public String getAddress() {
    return getXferAddr();
  }

  @Override
  public String toString() {
    return getClass().getSimpleName()
      + "(" + super.toString()
      + ", datanodeUuid=" + getDatanodeUuid()
      + ", infoPort=" + getInfoPort()
      + ", infoSecurePort=" + getInfoSecurePort()
      + ", ipcPort=" + getIpcPort()
      + ", storageInfo=" + storageInfo
      + ")";
  }

  @Override
  public boolean equals(Object to) {
    return super.equals(to);
  }
  @Override
  public int hashCode() {
    return super.hashCode();
  }
}

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