/*
Derby - Class org.apache.derbyTesting.functionTests.util.ExecProcUtil
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.derbyTesting.functionTests.util;
import org.apache.derbyTesting.functionTests.harness.ProcessStreamResult;
import org.apache.derbyTesting.functionTests.harness.TimedProcess;
import java.util.Vector;
import java.io.BufferedOutputStream;
/**
* Utility class to hold helper methods to exec new processes
*/
public class ExecProcUtil {
/**
* For each new exec process done, set
* timeout for ProcessStreamResult after which the thread that
* handles the streams for the process exits. Timeout is in minutes.
* Note: timeout handling will only come into effect when
* ProcessStreamResult#Wait() is called
*/
private static String timeoutMinutes = "2";
/**
* timeout in seconds for the processes spawned.
*/
private static int timeoutSecondsForProcess = 180;
/**
* Execute the given command and dump the results to standard out
*
* @param args command and arguments
* @param vCmd java command line arguments.
* @param bos buffered stream (System.out) to dump results to.
* @exception Exception
*/
public static void execCmdDumpResults(String[] args, Vector vCmd,
BufferedOutputStream bos) throws Exception {
// We need the process inputstream and errorstream
ProcessStreamResult prout = null;
ProcessStreamResult prerr = null;
StringBuffer sb = new StringBuffer();
for (int i = 0; i < args.length; i++) {
sb.append(args[i] + " ");
}
System.out.println(sb.toString());
int totalSize = vCmd.size() + args.length;
String serverCmd[] = new String[totalSize];
int i = 0;
for (i = 0; i < vCmd.size(); i++)
serverCmd[i] = (String) vCmd.elementAt(i);
for (int j = 0; i < totalSize; i++)
serverCmd[i] = args[j++];
System.out.flush();
bos.flush();
// Start a process to run the command
Process pr = Runtime.getRuntime().exec(serverCmd);
// TimedProcess, kill process if process doesnt finish in a certain
// amount of time
TimedProcess tp = new TimedProcess(pr);
prout = new ProcessStreamResult(pr.getInputStream(), bos,
timeoutMinutes);
prerr = new ProcessStreamResult(pr.getErrorStream(), bos,
timeoutMinutes);
// wait until all the results have been processed
boolean outTimedOut = prout.Wait();
boolean errTimedOut = prerr.Wait();
// wait for this process to terminate, upto a wait period
// of 'timeoutSecondsForProcess'
// if process has already been terminated, this call will
// return immediately.
tp.waitFor(timeoutSecondsForProcess);
pr = null;
if (outTimedOut || errTimedOut)
System.out.println(" Reading from process streams timed out.. ");
System.out.flush();
}
}