/**
* Checks whether the execution result return value is 0. If not, throws an exception.
*
* @param executionResult the process execution result
* @throws Exception if exit value is different than 0
*/
public static void checkReturnValue(ExecutionResult executionResult) throws Exception {
int exitValue = executionResult.getReturnValue();
if (exitValue != ExecutionResult.OK) {
throw new Exception(
"Exit value: "
+ exitValue
+ ", StdErr: "
+ executionResult.getStdErr().toString()
+ ", StdOut: "
+ executionResult.getStdOut().toString());
}
}
/**
* Runs the process builded by the given process builder.
*
* @param processBuilder the builder of the process
* @return the process execution result
* @throws Exception if a problem occurs amidst execution of the process
*/
public static ExecutionResult runProcess(ProcessBuilder processBuilder) throws Exception {
final Process startedProcess = processBuilder.start();
Callable<List<String>> stdOutCallable = createStreamCallable(startedProcess.getInputStream());
Callable<List<String>> stdErrCallable = createStreamCallable(startedProcess.getErrorStream());
Callable<Integer> waitForCallable = createWaitForCallable(startedProcess);
ExecutorService executor = Executors.newFixedThreadPool(3);
Future<List<String>> stdOutFuture = executor.submit(stdOutCallable);
Future<List<String>> stdErrFuture = executor.submit(stdErrCallable);
Future<Integer> waitForFuture = executor.submit(waitForCallable);
ExecutionResult executionResult = new ExecutionResult();
executionResult.setReturnValue(getWaitForCallableResult(waitForFuture));
executionResult.setStdOut(getStreamCallableResult(stdOutFuture));
executionResult.setStdErr(getStreamCallableResult(stdErrFuture));
executor.shutdownNow();
return executionResult;
}