hadoop YarnCLI 源码
haddop YarnCLI 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/YarnCLI.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.yarn.client.cli;
import java.io.PrintStream;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.yarn.client.api.YarnClient;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
@Private
@Unstable
public abstract class YarnCLI extends Configured implements Tool {
public static final String STATUS_CMD = "status";
public static final String LIST_CMD = "list";
public static final String KILL_CMD = "kill";
public static final String FAIL_CMD = "fail";
public static final String MOVE_TO_QUEUE_CMD = "movetoqueue";
public static final String HELP_CMD = "help";
public static final String SIGNAL_CMD = "signal";
protected PrintStream sysout;
protected PrintStream syserr;
protected YarnClient client;
public YarnCLI() {
super(new YarnConfiguration());
}
protected YarnClient createYarnClient() {
return YarnClient.createYarnClient();
}
protected void createAndStartYarnClient() {
client = createYarnClient();
client.init(getConf());
client.start();
}
public void setSysOutPrintStream(PrintStream sysout) {
this.sysout = sysout;
}
public void setSysErrPrintStream(PrintStream syserr) {
this.syserr = syserr;
}
public YarnClient getClient() {
return client;
}
public void setClient(YarnClient client) {
this.client = client;
}
public void stop() {
// this.client may be null when it is called before
// invoking `createAndStartYarnClient`
if (this.client != null) {
this.client.stop();
}
}
}
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