hadoop ItemInfo 源码
haddop ItemInfo 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/sps/ItemInfo.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.namenode.sps;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* ItemInfo is a file info object for which need to satisfy the policy.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class ItemInfo {
private long startPathId;
private long fileId;
private int retryCount;
public ItemInfo(long startPathId, long fileId) {
this.startPathId = startPathId;
this.fileId = fileId;
// set 0 when item is getting added first time in queue.
this.retryCount = 0;
}
public ItemInfo(final long startPathId, final long fileId,
final int retryCount) {
this.startPathId = startPathId;
this.fileId = fileId;
this.retryCount = retryCount;
}
/**
* Returns the start path of the current file. This indicates that SPS
* was invoked on this path.
*/
public long getStartPath() {
return startPathId;
}
/**
* Returns the file for which needs to satisfy the policy.
*/
public long getFile() {
return fileId;
}
/**
* Returns true if the tracking path is a directory, false otherwise.
*/
public boolean isDir() {
return !(startPathId == fileId);
}
/**
* Get the attempted retry count of the block for satisfy the policy.
*/
public int getRetryCount() {
return retryCount;
}
/**
* Increments the retry count.
*/
public void increRetryCount() {
this.retryCount++;
}
}
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