/*
* 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.uima.ducc.agent.launcher;
import java.net.InetAddress;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import org.apache.uima.ducc.agent.NodeAgent;
import org.apache.uima.ducc.agent.event.ProcessLifecycleObserver;
import org.apache.uima.ducc.common.NodeIdentity;
import org.apache.uima.ducc.common.utils.Utils;
import org.apache.uima.ducc.common.utils.id.DuccIdFactory;
import org.apache.uima.ducc.transport.cmdline.ICommandLine;
import org.apache.uima.ducc.transport.cmdline.JavaCommandLine;
import org.apache.uima.ducc.transport.event.common.DuccProcess;
import org.apache.uima.ducc.transport.event.common.IDuccProcess;
import org.apache.uima.ducc.transport.event.common.IDuccProcessType.ProcessType;
public class Launcher {
private ExecutorService executorService = null;
private DuccIdFactory duccIdFactory = new DuccIdFactory();
public Launcher() {
executorService = Executors.newCachedThreadPool();
}
/**
* This method is used to launch multiple Agents on the same physical machine. It allows
* to scale up Agents on a single machine to simulate load. Each Agent instance will
* assume a given name and IP address.
*
* @param cmdLine - defines the command line used to exec Agent process
* @param howMany - how many Agents to exec
* @param ip - initial IP address to assign to first Agent instance. Subsequent Agent instances
* will have this IP incremented as in XXX.XXX.XXX.XX+1,XXX.XXX.XXX.XX+2, etc
* @param nodeName - name of the physical machine. The Agents will be assigned this name plus
* a suffix as in watson-1, watson-2, etc
* @throws Exception
*/
public void start(ICommandLine cmdLine, int howMany, String ip, String nodeName) throws Exception {
// Launch as many agents as requested
for( int i=0; i < howMany; i++ ) {
String host = nodeName;
// Append suffix to node name for each Agent instance
if ( host.indexOf(".") > -1 ) {
String tmp = host.substring(0,host.indexOf("."));
host = tmp+"-"+String.valueOf(i+1)+host.substring(host.indexOf("."));
} else {
host = host+"-"+String.valueOf(i+1);
}
launchProcess(host, ip, cmdLine);
// Increment IP address for the next Agent
int uip = Integer.parseInt(ip.substring(ip.lastIndexOf(".")+1, ip.length()));
ip = ip.substring(0,ip.lastIndexOf(".")+1).concat(String.valueOf(uip+1));
}
}
/**
* Submit request to exec a process. The process will be exec'd in a separate thread.
*
* @param process
* @param commandLine
* @throws Exception
*/
public ManagedProcess launchProcess(NodeAgent agent, NodeIdentity nodeIdentity,IDuccProcess process, ICommandLine commandLine,ProcessLifecycleObserver observer, ManagedProcess managedProcess)
throws Exception {
// Instantiate executor that will actually exec the process using java's ProcessBuilder
DuccCommandExecutor executor =
new DuccCommandExecutor(agent, commandLine, nodeIdentity.getName(),nodeIdentity.getIp(), managedProcess);
Future<?> future = executorService.submit(executor);
// if we are launching a process, save the future object returned from Executor above
managedProcess.setFuture(future);
return managedProcess;
}
/**
* This method is used to simulation only. It enables launching an agent with
* a given name and IP address which are different from a physical node name
* and IP address. With that multiple agents can be launched on the same
* physical machine simulating a cluster of nodes.
*
*/
public void launchProcess(String host, String ip, ICommandLine cmdLine) throws Exception {
IDuccProcess process =
new DuccProcess(duccIdFactory.next(), new NodeIdentity(ip, host));
process.setProcessType(ProcessType.Pop);
ManagedProcess managedProcess = new ManagedProcess(process, cmdLine, true);
DuccCommandExecutor executor =
new DuccCommandExecutor(cmdLine, host, ip, managedProcess);
executorService.submit(executor);
}
public static void main(String[] args) {
try {
int howMany = Integer.parseInt(args[0]); // how many agent processes to launch
String ip = System.getProperty("IP");
String nodeName = InetAddress.getLocalHost().getHostName();
Launcher launcher = new Launcher();
JavaCommandLine cmdLine = new JavaCommandLine("java");
String duccHome = Utils.findDuccHome();
cmdLine.addOption("-Dducc.deploy.configuration="+duccHome+"/resources/ducc.properties");
cmdLine.addOption("-Dducc.deploy.components=agent");
cmdLine.addOption("-Djava.library.path=" + duccHome +"/lib/sigar");
cmdLine.addOption("-DDUCC_HOME=" + duccHome);
// System.out.println("Spawning with classpath: \n" + System.getProperty("java.class.path"));
// cmdLine.setClasspath(duccHome+"/lib/*:" +
// duccHome+"/lib/apache-activemq-5.5.0/*:" +
// duccHome+"/lib/apache-camel-2.7.1/*:" +
// duccHome+"/lib/commons-collections-3.2.1/*:" +
// duccHome+"/lib/apache-commons-lang-2.6/*:" +
// duccHome+"/lib/apache-log4j-1.2.16/*:" +
// duccHome+"/lib/guava-r09/*:" +
// duccHome+"/lib/joda-time-1.6/*:" +
// duccHome+"/lib/sigar/*:" +
// duccHome+"/lib/springframework-3.0.5/*:");
cmdLine.setClasspath(System.getProperty("java.class.path"));
cmdLine.setClassName("org.apache.uima.ducc.agent.common.main.DuccService");
launcher.start(cmdLine, howMany, ip, nodeName);
} catch( Exception e) {
e.printStackTrace();
}
}
}