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/*******************************************************************************
* Copyright (c) 2014, 2015 Wind River Systems, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Markus Schorn - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.remote.core;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.EventObject;
import org.eclipse.remote.core.AbstractRemoteProcess;
import org.eclipse.tcf.services.IProcesses.ProcessContext;
import org.eclipse.tcf.te.runtime.events.EventManager;
import org.eclipse.tcf.te.runtime.interfaces.events.IEventListener;
import org.eclipse.tcf.te.tcf.processes.core.launcher.ProcessLauncher;
import org.eclipse.tcf.te.tcf.processes.core.launcher.ProcessStateChangeEvent;
public class TCFProcess extends AbstractRemoteProcess implements IEventListener {
private InputStream fStdout;
private InputStream fStderr;
private OutputStream fStdin;
private PipedOutputStream fCombinedOutput;
private int fReadersDone;
private final ProcessLauncher fLauncher;
private int fExitValue;
private boolean fCompleted;
private class StreamForwarder implements Runnable {
private final static int BUF_SIZE = 8192;
private final InputStream fInput;
private final OutputStream fOutput;
public StreamForwarder(InputStream input, OutputStream output) {
fInput = input;
fOutput = output;
}
@Override
public void run() {
int len;
byte b[] = new byte[BUF_SIZE];
try {
while ((len = fInput.read(b)) > 0) {
fOutput.write(b, 0, len);
}
} catch (IOException e) {
}
onProcReaderDone();
}
}
private static class NullInputStream extends InputStream {
public NullInputStream() {
}
@Override
public int read() throws IOException {
return -1;
}
@Override
public int available() {
return 0;
}
}
public TCFProcess(ProcessLauncher launcher) {
fLauncher = launcher;
EventManager.getInstance().addEventListener(this, ProcessStateChangeEvent.class);
}
public void connectStreams(TCFProcessStreams streams, boolean redirectStderr) throws IOException {
if (redirectStderr) {
fCombinedOutput = new PipedOutputStream();
fStdout = new PipedInputStream(fCombinedOutput);
fStderr = null;
new Thread(new StreamForwarder(streams.getStdout(), fCombinedOutput)).start();
new Thread(new StreamForwarder(streams.getStderr(), fCombinedOutput)).start();
} else {
fStdout = streams.getStdout();
fStderr = streams.getStderr();
}
fStdin = streams.getStdin();
}
protected void onProcReaderDone() {
synchronized (this) {
if (++fReadersDone == 2) {
try {
fCombinedOutput.close();
} catch (IOException e) {
}
}
}
}
@Override
public void destroy() {
synchronized(this) {
if (fCompleted)
return;
}
fLauncher.cancel();
fLauncher.terminate();
synchronized (this) {
if (!fCompleted) {
fExitValue = -1;
fCompleted = true;
notifyAll();
}
}
EventManager.getInstance().removeEventListener(this);
}
@Override
public int exitValue() {
return fExitValue;
}
@Override
public InputStream getErrorStream() {
return fStderr != null ? fStderr : new NullInputStream();
}
@Override
public InputStream getInputStream() {
return fStdout != null ? fStdout : new NullInputStream();
}
@Override
public OutputStream getOutputStream() {
return fStdin;
}
@Override
public int waitFor() throws InterruptedException {
synchronized (this) {
while (!isCompleted()) {
wait();
}
}
return exitValue();
}
@Override
public boolean isCompleted() {
return fCompleted;
}
@Override
public void eventFired(EventObject event) {
if (event instanceof ProcessStateChangeEvent) {
ProcessStateChangeEvent pscEvent = (ProcessStateChangeEvent) event;
if (pscEvent.getEventId().equals(ProcessStateChangeEvent.EVENT_PROCESS_TERMINATED)) {
Object source = pscEvent.getSource();
if ((source instanceof ProcessContext)) {
ProcessContext context = (ProcessContext) fLauncher.getAdapter(ProcessContext.class);
if (context != null && ((ProcessContext) source).getID().equals(context.getID())) {
synchronized (this) {
fExitValue = pscEvent.getExitCode();
fCompleted = true;
notifyAll();
}
}
}
}
}
}
}
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