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/*
* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package nsk.share;
import nsk.share.*;
import java.io.*;
/**
* Wrapper for local process.
* <p>
* This class provides abilities to launch such process,
* redirect standard output streams, wait for process terminates
* or kill the process, and so on.
* <p>
* This object is finalized with <code>nsk.share.Finalizer</code>.
*
* @see nsk.share.FinalizableObject
* @see nsk.share.Finalizer
*/
public class LocalProcess extends FinalizableObject {
public final static int PROCESS_IS_ALIVE = 222;
private Process process;
protected Process getProcess() {
return process;
}
public void launch (String[] args) throws IOException {
System.out.println("Launching process by array of args: ");
for (int mm=0; mm < args.length; mm++) {
System.out.println(" args[" + Integer.toString(mm) + "]: >" +
args[mm] + "<");
}
process = Runtime.getRuntime().exec(args);
Finalizer finalizer = new Finalizer(this);
finalizer.activate();
}
public void launch (String cmdLine) throws IOException {
System.out.println("Launching process by command line: " + cmdLine);
process = Runtime.getRuntime().exec(cmdLine);
Finalizer finalizer = new Finalizer(this);
finalizer.activate();
}
/** Return exit status. */
public int getStatus () {
return process.exitValue();
}
/** Check whether the process has been terminated. */
public boolean terminated() {
try {
int value = process.exitValue();
return true;
} catch (IllegalThreadStateException e) {
return false;
}
}
/** Wait until the process shutdown or crash. */
public int waitFor () throws InterruptedException {
return process.waitFor();
}
/**
* Wait until the process shutdown or crash for given timeout in milliseconds.
* Returns <code>LocalProcess.PROCESS_IS_ALIVE</code> if process is not terminated
* after timeout.
*/
public int waitFor (long timeMillisec) throws InterruptedException {
final Object waitObject = new Object();
class Watcher extends Thread {
int exitCode = LocalProcess.PROCESS_IS_ALIVE;
Process process;
Watcher (Process process) {
this.process = process;
}
public void run () {
try {
synchronized (this) {
exitCode = process.waitFor();
}
} catch (InterruptedException ie) {
}
synchronized (waitObject) {
waitObject.notifyAll();
}
}
synchronized public int getExitCode() {
return exitCode;
}
}
Watcher watcher;
// yield control to watcher for timeMillisec time.
synchronized (waitObject) {
watcher = new Watcher(process);
watcher.start();
waitObject.wait(timeMillisec);
}
if (watcher.isAlive()) {
watcher.interrupt();
}
return watcher.getExitCode();
}
// --------------------------------------------------- //
/** Get a pipe to write to the process' stdin stream. */
public OutputStream getStdin () {
return process.getOutputStream();
}
/** Get a pipe to read the process' stdout stream. */
public InputStream getStdout () {
return process.getInputStream();
}
/** Get a pipe to read the process stderr stream. */
public InputStream getStderr () {
return process.getErrorStream();
}
/** Kill the process. */
protected void kill() {
process.destroy();
}
/**
* Finalize mirror by invoking <code>close()</code>.
*
* @throws Throwable if any throwable exception is thrown during finalization
*/
protected void finalize() throws Throwable {
kill();
super.finalize();
}
}
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