com.tupilabs.pbs.PBS Maven / Gradle / Ivy
Show all versions of pbs-java-api Show documentation
/*
* The MIT License
*
* Copyright (c) <2012>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.tupilabs.pbs;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import org.apache.commons.exec.CommandLine;
import org.apache.commons.exec.DefaultExecuteResultHandler;
import org.apache.commons.exec.DefaultExecutor;
import org.apache.commons.exec.ExecuteException;
import org.apache.commons.exec.ExecuteStreamHandler;
import org.apache.commons.exec.PumpStreamHandler;
import org.apache.commons.lang.StringUtils;
import com.tupilabs.pbs.model.Job;
import com.tupilabs.pbs.model.Node;
import com.tupilabs.pbs.model.Queue;
import com.tupilabs.pbs.parser.NodeXmlParser;
import com.tupilabs.pbs.parser.ParseException;
import com.tupilabs.pbs.parser.QstatJobsParser;
import com.tupilabs.pbs.parser.QstatQueuesParser;
import com.tupilabs.pbs.util.PBSException;
/**
* PBS Java API.
* @author Bruno P. Kinoshita - http://www.kinoshita.eti.br
* @since 0.1
*/
public class PBS {
/**
* PBS qnodes command.
*
* Get information about the cluster nodes.
* @return list of nodes
* @throws PBSException
*/
public static List qnodes() {
return qnodes(null);
}
/**
* PBS qnodes command.
*
* Get information about the cluster nodes.
* @param name node name
* @return list of nodes
* @throws PBSException
*/
public static List qnodes(String name) {
final List nodes;
final CommandLine cmdLine = new CommandLine(COMMAND_QNODES);
cmdLine.addArgument(PARAMETER_XML);
if(StringUtils.isNotBlank(name)) {
cmdLine.addArgument(name);
}
final OutputStream out = new ByteArrayOutputStream();
final OutputStream err = new ByteArrayOutputStream();
DefaultExecuteResultHandler resultHandler;
try {
resultHandler = execute(cmdLine, out, err);
resultHandler.waitFor(DEFAULT_TIMEOUT);
} catch (ExecuteException e) {
throw new PBSException("Failed to execute qnodes command: " + e.getMessage(), e);
} catch (IOException e) {
throw new PBSException("Failed to execute qnodes command: " + e.getMessage(), e);
} catch (InterruptedException e) {
throw new PBSException("Failed to execute qnodes command: " + e.getMessage(), e);
}
final int exitValue = resultHandler.getExitValue();
LOGGER.info("qnodes exit value: " + exitValue);
try {
nodes = NODE_XML_PARSER.parse(out.toString());
} catch (ParseException pe) {
throw new PBSException("Failed to parse node XML: " + pe.getMessage(), pe);
}
return nodes;
}
/**
* PBS qstat command.
*
* Equivalent to qstat -Q -f [name]
* @param name queue name
* @return list of queues
*/
public static List qstatQueues() {
return qstatQueues(null);
}
/**
* PBS qstat command.
*
* Equivalent to qstat -Q -f [name]
* @param name queue name
* @return list of queues
*/
public static List qstatQueues(String name) {
final CommandLine cmdLine = new CommandLine(COMMAND_QSTAT);
cmdLine.addArgument(PARAMETER_FULL_STATUS);
cmdLine.addArgument(PARAMETER_QUEUE);
if(StringUtils.isNotBlank(name)) {
cmdLine.addArgument(name);
}
final OutputStream out = new ByteArrayOutputStream();
final OutputStream err = new ByteArrayOutputStream();
DefaultExecuteResultHandler resultHandler;
try {
resultHandler = execute(cmdLine, out, err);
resultHandler.waitFor(DEFAULT_TIMEOUT);
} catch (ExecuteException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
} catch (IOException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
} catch (InterruptedException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
}
final int exitValue = resultHandler.getExitValue();
LOGGER.info("qstat exit value: " + exitValue);
final List queues;
try {
queues = QSTAT_QUEUES_PARSER.parse(out.toString());
} catch (ParseException pe) {
throw new PBSException("Failed to parse qstat queues output: " + pe.getMessage(), pe);
}
return (queues == null ? new ArrayList(0) : queues);
}
/**
* PBS qstat command.
*
* Equivalent to qstat -f [name]
* @return list of jobs
*/
public static List qstatJobs() {
return qstatJobs(null);
}
/**
* PBS qstat command.
*
* Equivalent to qstat -f [name]
* @param name job name
* @return list of jobs
*/
public static List qstatJobs(String name) {
final CommandLine cmdLine = new CommandLine(COMMAND_QSTAT);
cmdLine.addArgument(PARAMETER_FULL_STATUS);
if(StringUtils.isNotBlank(name)) {
cmdLine.addArgument(name);
}
final OutputStream out = new ByteArrayOutputStream();
final OutputStream err = new ByteArrayOutputStream();
DefaultExecuteResultHandler resultHandler;
try {
resultHandler = execute(cmdLine, out, err);
resultHandler.waitFor(DEFAULT_TIMEOUT);
} catch (ExecuteException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
} catch (IOException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
} catch (InterruptedException e) {
throw new PBSException("Failed to execute qstat command: " + e.getMessage(), e);
}
final int exitValue = resultHandler.getExitValue();
LOGGER.info("qstat exit value: " + exitValue);
final List jobs;
try {
jobs = QSTAT_JOBS_PARSER.parse(out.toString());
} catch (ParseException pe) {
throw new PBSException("Failed to parse qstat jobs output: " + pe.getMessage(), pe);
}
return (jobs == null ? new ArrayList(0) : jobs);
}
/*
* ------------------------------
* Utility methods
* ------------------------------
*/
/**
* Executes a PBS command.
* @param cmdLine command
* @param out output stream
* @param err err stream
* @return execute handler
* @throws ExecuteException
* @throws IOException
*/
static DefaultExecuteResultHandler execute(CommandLine cmdLine, OutputStream out, OutputStream err) throws ExecuteException, IOException {
DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler();
ExecuteStreamHandler streamHandler = new PumpStreamHandler(out, err);
DefaultExecutor executor = new DefaultExecutor();
executor.setExitValue(0);
executor.setStreamHandler(streamHandler);
executor.execute(cmdLine, resultHandler);
return resultHandler;
}
private static final Logger LOGGER = Logger.getLogger(PBS.class.getName());
private static final String COMMAND_QNODES = "qnodes";
private static final String PARAMETER_XML = "-x";
private static final String COMMAND_QSTAT = "qstat";
private static final String PARAMETER_FULL_STATUS = "-f";
private static final String PARAMETER_QUEUE = "-Q";
private static final NodeXmlParser NODE_XML_PARSER = new NodeXmlParser();
private static final QstatQueuesParser QSTAT_QUEUES_PARSER = new QstatQueuesParser();
private static final QstatJobsParser QSTAT_JOBS_PARSER = new QstatJobsParser();
/**
* Default time-out for process execution.
*/
private static final int DEFAULT_TIMEOUT = 60000;
// public static void main(String[] args) throws Exception {
// List nodes = PBS.qnodes("chuva");
// for(Node node : nodes) {
// System.out.println(node);
// }
// System.out.println("------");
// List queues = PBS.qstatQueues("batch");
// for(Queue queue : queues) {
// System.out.println(queue);
// }
// System.out.println("------");
// List jobs = PBS.qstatJobs();
// for(Job job : jobs) {
// System.out.println(job);
// }
// }
}