hadoop NodeId 源码

haddop NodeId 代码

文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/NodeId.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.yarn.api.records;

import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.classification.InterfaceStability.Stable;
import org.apache.hadoop.yarn.util.Records;

/**
 * <p><code>NodeId</code> is the unique identifier for a node.</p>
 * 
 * <p>It includes the <em>hostname</em> and <em>port</em> to uniquely 
 * identify the node. Thus, it is unique across restarts of any 
 * <code>NodeManager</code>.</p>
 */
@Public
@Stable
public abstract class NodeId implements Comparable<NodeId> {

  @Public
  @Stable
  public static NodeId newInstance(String host, int port) {
    NodeId nodeId = Records.newRecord(NodeId.class);
    nodeId.setHost(host);
    nodeId.setPort(port);
    nodeId.build();
    return nodeId;
  }

  /**
   * Get the <em>hostname</em> of the node.
   * @return <em>hostname</em> of the node
   */ 
  @Public
  @Stable
  public abstract String getHost();
  
  @Private
  @Unstable
  protected abstract void setHost(String host);

  /**
   * Get the <em>port</em> for communicating with the node.
   * @return <em>port</em> for communicating with the node
   */
  @Public
  @Stable
  public abstract int getPort();
  
  @Private
  @Unstable
  protected abstract void setPort(int port);

  @Override
  public String toString() {
    return this.getHost() + ":" + this.getPort();
  }

  @Override
  public int hashCode() {
    final int prime = 493217;
    int result = 8501;
    result = prime * result + this.getHost().hashCode();
    result = prime * result + this.getPort();
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    NodeId other = (NodeId) obj;
    if (!this.getHost().equals(other.getHost()))
      return false;
    if (this.getPort() != other.getPort())
      return false;
    return true;
  }

  @Override
  public int compareTo(NodeId other) {
    int hostCompare = this.getHost().compareTo(other.getHost());
    if (hostCompare == 0) {
      if (this.getPort() > other.getPort()) {
        return 1;
      } else if (this.getPort() < other.getPort()) {
        return -1;
      }
      return 0;
    }
    return hostCompare;
  }
  
  @Public
  @Stable
  public static NodeId fromString(String nodeIdStr) {
    String[] parts = nodeIdStr.split(":");
    if (parts.length != 2) {
      throw new IllegalArgumentException("Invalid NodeId [" + nodeIdStr
          + "]. Expected host:port");
    }
    try {
      NodeId nodeId =
          NodeId.newInstance(parts[0].trim(), Integer.parseInt(parts[1]));
      return nodeId;
    } catch (NumberFormatException e) {
      throw new IllegalArgumentException("Invalid port: " + parts[1], e);
    }
  }

  protected abstract void build();
}

相关信息

hadoop 源码目录

相关文章

hadoop AMCommand 源码

hadoop AllocationTagNamespaceType 源码

hadoop ApplicationAccessType 源码

hadoop ApplicationAttemptId 源码

hadoop ApplicationAttemptReport 源码

hadoop ApplicationId 源码

hadoop ApplicationReport 源码

hadoop ApplicationResourceUsageReport 源码

hadoop ApplicationSubmissionContext 源码

hadoop ApplicationTimeout 源码