hadoop NamenodeRegistration 源码
haddop NamenodeRegistration 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/NamenodeRegistration.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.server.common.Storage;
import org.apache.hadoop.hdfs.server.common.StorageInfo;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole;
/**
* Information sent by a subordinate name-node to the active name-node
* during the registration process.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class NamenodeRegistration extends StorageInfo
implements NodeRegistration {
final String rpcAddress; // RPC address of the node
final String httpAddress; // HTTP address of the node
final NamenodeRole role; // node role
public NamenodeRegistration(String address,
String httpAddress,
StorageInfo storageInfo,
NamenodeRole role) {
super(storageInfo);
this.rpcAddress = address;
this.httpAddress = httpAddress;
this.role = role;
}
@Override // NodeRegistration
public String getAddress() {
return rpcAddress;
}
public String getHttpAddress() {
return httpAddress;
}
@Override // NodeRegistration
public String getRegistrationID() {
return Storage.getRegistrationID(this);
}
@Override // NodeRegistration
public int getVersion() {
return super.getLayoutVersion();
}
@Override // NodeRegistration
public String toString() {
return getClass().getSimpleName()
+ "(" + rpcAddress
+ ", role=" + getRole()
+ ")";
}
/**
* Get name-node role.
*/
public NamenodeRole getRole() {
return role;
}
public boolean isRole(NamenodeRole that) {
return role.equals(that);
}
}
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