/*
* 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.util;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.yarn.state.StateMachineFactory;
public class VisualizeStateMachine {
/**
* @param classes list of classes which have static field
* stateMachineFactory of type StateMachineFactory
* @return graph represent this StateMachine
*/
public static Graph getGraphFromClasses(String graphName, List<String> classes)
throws Exception {
Graph ret = null;
if (classes.size() != 1) {
ret = new Graph(graphName);
}
for (String className : classes) {
Class clz = Class.forName(className);
Field factoryField = clz.getDeclaredField("stateMachineFactory");
factoryField.setAccessible(true);
StateMachineFactory factory = (StateMachineFactory) factoryField.get(null);
if (classes.size() == 1) {
return factory.generateStateGraph(graphName);
}
String gname = clz.getSimpleName();
if (gname.endsWith("Impl")) {
gname = gname.substring(0, gname.length()-4);
}
ret.addSubGraph(factory.generateStateGraph(gname));
}
return ret;
}
public static void main(String [] args) throws Exception {
if (args.length < 3) {
System.err.printf("Usage: %s <GraphName> <class[,class[,...]]> <OutputFile>\n",
VisualizeStateMachine.class.getName());
System.exit(1);
}
String [] classes = args[1].split(",");
ArrayList<String> validClasses = new ArrayList<String>();
for (String c : classes) {
String vc = c.trim();
if (vc.length()>0) {
validClasses.add(vc);
}
}
Graph g = getGraphFromClasses(args[0], validClasses);
g.save(args[2]);
}
}