hadoop EventBatchList 源码
haddop EventBatchList 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/inotify/EventBatchList.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.inotify;
import org.apache.hadoop.classification.InterfaceAudience;
import java.util.List;
/**
* Contains a list of event batches, the transaction ID in the edit log up to
* which we read to produce these events, and the first txid we observed when
* producing these events (the last of which is for the purpose of determining
* whether we have missed events due to edit deletion). Also contains the most
* recent txid that the NameNode has sync'ed, so the client can determine how
* far behind in the edit log it is.
*/
@InterfaceAudience.Private
public class EventBatchList {
private List<EventBatch> batches;
private long firstTxid;
private long lastTxid;
private long syncTxid;
public EventBatchList(List<EventBatch> batches, long firstTxid,
long lastTxid, long syncTxid) {
this.batches = batches;
this.firstTxid = firstTxid;
this.lastTxid = lastTxid;
this.syncTxid = syncTxid;
}
public List<EventBatch> getBatches() {
return batches;
}
public long getFirstTxid() {
return firstTxid;
}
public long getLastTxid() {
return lastTxid;
}
public long getSyncTxid() {
return syncTxid;
}
}
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