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/*******************************************************************************
* Copyright (c) 2011 Anton Gorenkov
* 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:
* Anton Gorenkov - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.testsrunner.internal.launcher;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Wraps the underline process and prevent accessing to its output or error stream.
* This wrapping is necessary to prevent handling the test module output by Console
* because we want to handle it here.
*
*/
class ProcessWrapper extends Process {
/** The real underlying process. */
private Process wrappedProcess;
/** The flag shows whether input stream should be replaced with empty dummy. */
private boolean hideInputStream;
/** The flag shows whether error stream should be replaced with empty dummy. */
private boolean hideErrorStream;
/** Buffer for empty dummy stream. */
private byte buffer[] = new byte[0];
/** Empty dummy stream. */
private InputStream emptyInputStream = new ByteArrayInputStream(buffer);
/**
* The synchronization event: before it happens <code>waitFor()</code> will
* not be called on underlying process object. See also the comments in
* <code>waitFor()</code>.
*/
private Object waitForSync = new Object();
/**
* Flag that shows that process output was not processed yet so the IO
* streams could not be closed yet.
*/
private boolean streamsClosingIsAllowed = false;
/**
* The constructor
*
* @param wrappedProcess underlying process
* @param hideInputStream process input stream should be hidden
* @param hideErrorStream process error stream should be hidden
*/
public ProcessWrapper(Process wrappedProcess, boolean hideInputStream, boolean hideErrorStream) {
this.wrappedProcess = wrappedProcess;
this.hideInputStream = hideInputStream;
this.hideErrorStream = hideErrorStream;
}
@Override
public void destroy() {
wrappedProcess.destroy();
}
@Override
public int exitValue() {
return wrappedProcess.exitValue();
}
@Override
public InputStream getErrorStream() {
return hideErrorStream ? emptyInputStream : wrappedProcess.getErrorStream();
}
@Override
public InputStream getInputStream() {
return hideInputStream ? emptyInputStream : wrappedProcess.getInputStream();
}
@Override
public OutputStream getOutputStream() {
return wrappedProcess.getOutputStream();
}
@Override
public int waitFor() throws InterruptedException {
// NOTE: implementation of waitFor() in Spawner will close streams after process is terminated,
// so we should wait with this operation until we process all stream data
synchronized (waitForSync) {
if (!streamsClosingIsAllowed) {
waitForSync.wait();
}
}
return wrappedProcess.waitFor();
}
/**
* Sets up the flag the allows IO streams closing.
*/
public void allowStreamsClosing() {
synchronized (waitForSync) {
streamsClosingIsAllowed = true;
waitForSync.notifyAll();
}
}
}
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