hadoop ReplicaHandler 源码
haddop ReplicaHandler 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/ReplicaHandler.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.datanode;
import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsVolumeReference;
import java.io.Closeable;
import java.io.IOException;
/**
* This class includes a replica being actively written and the reference to
* the fs volume where this replica is located.
*/
public class ReplicaHandler implements Closeable {
private final ReplicaInPipeline replica;
private final FsVolumeReference volumeReference;
public ReplicaHandler(
ReplicaInPipeline replica, FsVolumeReference reference) {
this.replica = replica;
this.volumeReference = reference;
}
@Override
public void close() throws IOException {
if (this.volumeReference != null) {
volumeReference.close();
}
}
public ReplicaInPipeline getReplica() {
return replica;
}
}
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