/**
*
* 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;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.CoordinatedStateManagerFactory;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.LocalHBaseCluster;
import org.apache.hadoop.hbase.CoordinatedStateManager;
import org.apache.hadoop.hbase.util.ServerCommandLine;
/**
* Class responsible for parsing the command line and starting the
* RegionServer.
*/
@InterfaceAudience.Private
public class HRegionServerCommandLine extends ServerCommandLine {
private static final Log LOG = LogFactory.getLog(HRegionServerCommandLine.class);
private final Class<? extends HRegionServer> regionServerClass;
private static final String USAGE =
"Usage: HRegionServer [-D conf.param=value] start";
public HRegionServerCommandLine(Class<? extends HRegionServer> clazz) {
this.regionServerClass = clazz;
}
protected String getUsage() {
return USAGE;
}
private int start() throws Exception {
Configuration conf = getConf();
CoordinatedStateManager cp = CoordinatedStateManagerFactory.getCoordinatedStateManager(conf);
try {
// If 'local', don't start a region server here. Defer to
// LocalHBaseCluster. It manages 'local' clusters.
if (LocalHBaseCluster.isLocal(conf)) {
LOG.warn("Not starting a distinct region server because "
+ HConstants.CLUSTER_DISTRIBUTED + " is false");
} else {
logProcessInfo(getConf());
HRegionServer hrs = HRegionServer.constructRegionServer(regionServerClass, conf, cp);
hrs.start();
hrs.join();
if (hrs.isAborted()) {
throw new RuntimeException("HRegionServer Aborted");
}
}
} catch (Throwable t) {
LOG.error("Region server exiting", t);
return 1;
}
return 0;
}
public int run(String args[]) throws Exception {
if (args.length != 1) {
usage(null);
return 1;
}
String cmd = args[0];
if ("start".equals(cmd)) {
return start();
} else if ("stop".equals(cmd)) {
System.err.println(
"To shutdown the regionserver run " +
"bin/hbase-daemon.sh stop regionserver or send a kill signal to" +
"the regionserver pid");
return 1;
} else {
usage("Unknown command: " + args[0]);
return 1;
}
}
}