/**
* Execute an external process. Note: this is not a command-line command, it is a single program
* and arguments.
*
* @param exec the executable and arguments of the process
* @param envVars environment variables of the form name=value. If null, inherits vars from
* current process.
* @param dir the working directory. If null, uses the working dir from the current process
* @param outStreamRedir stdout of the process will be redirected to this stream if not null
* @param errStreamRedir stderr of the process will be redirected to this stream if not null
*/
public Exec(
String[] exec,
String[] envVars,
File dir,
OutputStream outStreamRedir,
OutputStream errStreamRedir) {
this.command = null;
this.exec = exec;
this.envVars = envVars;
this.dir = dir;
launcherEnvironment = Environment.getThreadEnvironment();
userInterface = new UserInterfaceExec();
this.outStreamRedir = outStreamRedir;
this.errStreamRedir = errStreamRedir;
this.processWriter = null;
this.finishedListeners = new ArrayList<FinishedListener>();
this.exitVal = -1;
setName(exec[0]);
}
public void run() {
if (Thread.currentThread() == this) {
Environment.setThreadEnvironment(launcherEnvironment);
Job.setUserInterface(userInterface);
}
if (outStreamRedir instanceof OutputStreamChecker) {
((OutputStreamChecker) outStreamRedir).setExec(this);
}
if (errStreamRedir instanceof OutputStreamChecker) {
((OutputStreamChecker) errStreamRedir).setExec(this);
}
try {
Runtime rt = Runtime.getRuntime();
ExecProcessReader outReader = null;
ExecProcessReader errReader = null;
// run program
synchronized (this) {
try {
if (command != null) p = rt.exec(command, envVars, dir);
else p = rt.exec(exec, envVars, dir);
} catch (IOException e) {
System.out.println("Error running " + command + ": " + e.getMessage());
return;
}
// eat output (stdout) and stderr from program so it doesn't block
outReader = new ExecProcessReader(p.getInputStream(), outStreamRedir);
errReader = new ExecProcessReader(p.getErrorStream(), errStreamRedir);
outReader.start();
errReader.start();
// attach to input of process
processWriter = new PrintWriter(p.getOutputStream());
}
// wait for exit status
exitVal = p.waitFor();
// also wait for redir threads to die, if doing redir
if (outStreamRedir != null) outReader.join();
if (errStreamRedir != null) errReader.join();
StringBuffer com = new StringBuffer();
if (command != null) com.append(command);
else {
for (int i = 0; i < exec.length; i++) com.append(exec[i] + " ");
}
// System.out.println("Process finished [exit: "+exitVal+"]: "+com.toString());
synchronized (finishedListeners) {
FinishedEvent e = new FinishedEvent(this, com.toString(), dir, exitVal);
ArrayList<FinishedListener> copy = new ArrayList<FinishedListener>();
// make copy cause listeners may want to remove themselves if process finished
for (FinishedListener l : finishedListeners) {
copy.add(l);
}
for (FinishedListener l : copy) {
l.processFinished(e);
}
}
synchronized (this) {
if (processWriter != null) {
processWriter.close();
processWriter = null;
}
}
} catch (Exception e) {
ActivityLogger.logException(e);
}
}
