/**
*
* 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.hbase.regionserver.handler;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.Server;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.SplitLogCounters;
import org.apache.hadoop.hbase.SplitLogTask;
import org.apache.hadoop.hbase.coordination.SplitLogWorkerCoordination;
import org.apache.hadoop.hbase.executor.EventHandler;
import org.apache.hadoop.hbase.executor.EventType;
import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos.SplitLogTask.RecoveryMode;
import org.apache.hadoop.hbase.regionserver.SplitLogWorker.TaskExecutor;
import org.apache.hadoop.hbase.regionserver.SplitLogWorker.TaskExecutor.Status;
import org.apache.hadoop.hbase.util.CancelableProgressable;
/**
* Handles log splitting a wal
*/
@InterfaceAudience.Private
public class HLogSplitterHandler extends EventHandler {
private static final Log LOG = LogFactory.getLog(HLogSplitterHandler.class);
private final ServerName serverName;
private final CancelableProgressable reporter;
private final AtomicInteger inProgressTasks;
private final TaskExecutor splitTaskExecutor;
private final RecoveryMode mode;
private final SplitLogWorkerCoordination.SplitTaskDetails splitTaskDetails;
private final SplitLogWorkerCoordination coordination;
public HLogSplitterHandler(final Server server, SplitLogWorkerCoordination coordination,
SplitLogWorkerCoordination.SplitTaskDetails splitDetails, CancelableProgressable reporter,
AtomicInteger inProgressTasks, TaskExecutor splitTaskExecutor, RecoveryMode mode) {
super(server, EventType.RS_LOG_REPLAY);
this.splitTaskDetails = splitDetails;
this.coordination = coordination;
this.reporter = reporter;
this.inProgressTasks = inProgressTasks;
this.inProgressTasks.incrementAndGet();
this.serverName = server.getServerName();
this.splitTaskExecutor = splitTaskExecutor;
this.mode = mode;
}
@Override
public void process() throws IOException {
long startTime = System.currentTimeMillis();
try {
Status status = this.splitTaskExecutor.exec(splitTaskDetails.getWALFile(), mode, reporter);
switch (status) {
case DONE:
coordination.endTask(new SplitLogTask.Done(this.serverName,this.mode),
SplitLogCounters.tot_wkr_task_done, splitTaskDetails);
break;
case PREEMPTED:
SplitLogCounters.tot_wkr_preempt_task.incrementAndGet();
LOG.warn("task execution prempted " + splitTaskDetails.getWALFile());
break;
case ERR:
if (server != null && !server.isStopped()) {
coordination.endTask(new SplitLogTask.Err(this.serverName, this.mode),
SplitLogCounters.tot_wkr_task_err, splitTaskDetails);
break;
}
// if the RS is exiting then there is probably a tons of stuff
// that can go wrong. Resign instead of signaling error.
//$FALL-THROUGH$
case RESIGNED:
if (server != null && server.isStopped()) {
LOG.info("task execution interrupted because worker is exiting "
+ splitTaskDetails.toString());
}
coordination.endTask(new SplitLogTask.Resigned(this.serverName, this.mode),
SplitLogCounters.tot_wkr_task_resigned, splitTaskDetails);
break;
}
} finally {
LOG.info("worker " + serverName + " done with task " + splitTaskDetails.toString() + " in "
+ (System.currentTimeMillis() - startTime) + "ms");
this.inProgressTasks.decrementAndGet();
}
}
}