org.apache.pulsar.io.hdfs2.sink.HdfsSyncThread Maven / Gradle / Ivy
/**
* 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.pulsar.io.hdfs2.sink;
import java.io.IOException;
import java.util.concurrent.BlockingQueue;
import org.apache.commons.collections.CollectionUtils;
import org.apache.hadoop.fs.Syncable;
import org.apache.pulsar.functions.api.Record;
/**
* A thread that runs in the background and acknowledges Records
* after they have been written to disk.
*
* @param
*/
public class HdfsSyncThread extends Thread {
private final Syncable stream;
private final BlockingQueue> unackedRecords;
private final long syncInterval;
private boolean keepRunning = true;
public HdfsSyncThread(Syncable stream, BlockingQueue> unackedRecords, long syncInterval) {
this.stream = stream;
this.unackedRecords = unackedRecords;
this.syncInterval = syncInterval;
}
@Override
public void run() {
while (keepRunning) {
try {
Thread.sleep(syncInterval);
ackRecords();
} catch (InterruptedException e) {
return;
} catch (IOException e) {
e.printStackTrace();
}
}
}
public final void halt() throws IOException, InterruptedException {
keepRunning = false;
ackRecords();
}
private void ackRecords() throws IOException, InterruptedException {
if (CollectionUtils.isEmpty(unackedRecords)) {
return;
}
synchronized (stream) {
stream.hsync();
}
while (!unackedRecords.isEmpty()) {
unackedRecords.take().ack();
}
}
}