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HBASE-2980. Refactor region server command line to a new class
git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@996633 13f79535-47bb-0310-9956-ffa450edef68
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87 changes: 87 additions & 0 deletions
87
src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServerCommandLine.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| /** | ||
| * Copyright 2010 The Apache Software Foundation | ||
| * | ||
| * 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; | ||
|
|
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| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
|
|
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| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.hbase.HConstants; | ||
| import org.apache.hadoop.hbase.LocalHBaseCluster; | ||
| import org.apache.hadoop.hbase.util.ServerCommandLine; | ||
|
|
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| /** | ||
| * Class responsible for parsing the command line and starting the | ||
| * RegionServer. | ||
| */ | ||
| public class HRegionServerCommandLine extends ServerCommandLine { | ||
| private static final Log LOG = LogFactory.getLog(HRegionServerCommandLine.class); | ||
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| private final Class<? extends HRegionServer> regionServerClass; | ||
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| private static final String USAGE = | ||
| "Usage: HRegionServer [-D conf.param=value] start"; | ||
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| public HRegionServerCommandLine(Class<? extends HRegionServer> clazz) { | ||
| this.regionServerClass = clazz; | ||
| } | ||
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| protected String getUsage() { | ||
| return USAGE; | ||
| } | ||
|
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| private int start() throws Exception { | ||
| Configuration conf = getConf(); | ||
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| // 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 { | ||
| logJVMInfo(); | ||
| HRegionServer hrs = HRegionServer.constructRegionServer(regionServerClass, conf); | ||
| HRegionServer.startRegionServer(hrs); | ||
| } | ||
| return 0; | ||
| } | ||
|
|
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| public int run(String args[]) throws Exception { | ||
| if (args.length != 1) { | ||
| usage(null); | ||
| return -1; | ||
| } | ||
|
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| String cmd = args[0]; | ||
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| 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; | ||
| } | ||
| } | ||
| } |
82 changes: 82 additions & 0 deletions
82
src/main/java/org/apache/hadoop/hbase/util/ServerCommandLine.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| /** | ||
| * Copyright 2010 The Apache Software Foundation | ||
| * | ||
| * 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.util; | ||
|
|
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| import java.lang.management.RuntimeMXBean; | ||
| import java.lang.management.ManagementFactory; | ||
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| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
| import org.apache.hadoop.conf.Configuration; | ||
| import org.apache.hadoop.conf.Configured; | ||
| import org.apache.hadoop.hbase.HBaseConfiguration; | ||
| import org.apache.hadoop.util.Tool; | ||
| import org.apache.hadoop.util.ToolRunner; | ||
|
|
||
| /** | ||
| * Base class for command lines that start up various HBase daemons. | ||
| */ | ||
| public abstract class ServerCommandLine extends Configured implements Tool { | ||
| private static final Log LOG = LogFactory.getLog(ServerCommandLine.class); | ||
|
|
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| /** | ||
| * Implementing subclasses should return a usage string to print out. | ||
| */ | ||
| protected abstract String getUsage(); | ||
|
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| /** | ||
| * Print usage information for this command line. | ||
| * | ||
| * @param message if not null, print this message before the usage info. | ||
| */ | ||
| protected void usage(String message) { | ||
| if (message != null) { | ||
| System.err.println(message); | ||
| System.err.println(""); | ||
| } | ||
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| System.err.println(getUsage()); | ||
| } | ||
|
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| /** | ||
| * Log information about the currently running JVM. | ||
| */ | ||
| public static void logJVMInfo() { | ||
| // Print out vm stats before starting up. | ||
| RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean(); | ||
| if (runtime != null) { | ||
| LOG.info("vmName=" + runtime.getVmName() + ", vmVendor=" + | ||
| runtime.getVmVendor() + ", vmVersion=" + runtime.getVmVersion()); | ||
| LOG.info("vmInputArguments=" + runtime.getInputArguments()); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Parse and run the given command line. This may exit the JVM if | ||
| * a nonzero exit code is returned from <code>run()</code>. | ||
| */ | ||
| public void doMain(String args[]) throws Exception { | ||
| int ret = ToolRunner.run( | ||
| HBaseConfiguration.create(), this, args); | ||
| if (ret != 0) { | ||
| System.exit(ret); | ||
| } | ||
| } | ||
| } |
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