Java: set timeout on a certain block of code?

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Here’s the simplest way that I know of to do this:

final Runnable stuffToDo = new Thread() {
  @Override 
  public void run() { 
    /* Do stuff here. */ 
  }
};

final ExecutorService executor = Executors.newSingleThreadExecutor();
final Future future = executor.submit(stuffToDo);
executor.shutdown(); // This does not cancel the already-scheduled task.

try { 
  future.get(5, TimeUnit.MINUTES); 
}
catch (InterruptedException ie) { 
  /* Handle the interruption. Or ignore it. */ 
}
catch (ExecutionException ee) { 
  /* Handle the error. Or ignore it. */ 
}
catch (TimeoutException te) { 
  /* Handle the timeout. Or ignore it. */ 
}
if (!executor.isTerminated())
    executor.shutdownNow(); // If you want to stop the code that hasn't finished.

Alternatively, you can create a TimeLimitedCodeBlock class to wrap this functionality, and then you can use it wherever you need it as follows:

new TimeLimitedCodeBlock(5, TimeUnit.MINUTES) { @Override public void codeBlock() {
    // Do stuff here.
}}.run();

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