hadoop JournalInfo 源码
haddop JournalInfo 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/protocol/JournalInfo.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;
/**
* Information that describes a journal
*/
@InterfaceAudience.Private
public class JournalInfo {
private final int layoutVersion;
private final String clusterId;
private final int namespaceId;
public JournalInfo(int lv, String clusterId, int nsId) {
this.layoutVersion = lv;
this.clusterId = clusterId;
this.namespaceId = nsId;
}
public int getLayoutVersion() {
return layoutVersion;
}
public String getClusterId() {
return clusterId;
}
public int getNamespaceId() {
return namespaceId;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("lv=").append(layoutVersion).append(";cid=").append(clusterId)
.append(";nsid=").append(namespaceId);
return sb.toString();
}
@Override
public boolean equals(Object o) {
JournalInfo jInfo;
if (!(o instanceof JournalInfo)) {
return false;
}
jInfo = (JournalInfo) o;
return ((jInfo.clusterId.equals(this.clusterId))
&& (jInfo.namespaceId == this.namespaceId)
&& (jInfo.layoutVersion == this.layoutVersion));
}
@Override
public int hashCode() {
return (namespaceId ^ layoutVersion ^ clusterId.hashCode());
}
}
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