While working on https://jira.jboss.org/jira/browse/JBMESSAGING-1680, I need to create a thread and move some existing piece of code inside a method to that thread for concurrent execution. The method can be simplified as this: | public void methodA() throw Exception | { | doWork1(); | | doWork2(); | } | doWork1() and doWork2() are two tasks independent of each other so they can be optimized using thread. So I plan to move doWork1() to another thread, like: | public void methodA() throw Exception | { | new Thread() { public void run() { doWork1(); } }.start(); | | doWork2(); | } | The problems is that both doWork1() and doWork2() may throw Exception. So after my change, the doWork1() will be executed in a separate thread and it's exception will never be thrown from the calling thread of methodA(). To solve this, I uses a variable to hold the exception, like this: | public void methodA() throw Exception | { | final ExceptionHolder holder = new ExceptionHolder(); //a holder simply holds an exception reference. | | new Thread() { public void run() { | try | { | doWork1(); | } | catch (Exception e) | { | holder = e; //pass the exception to holder. | } | } }.start(); | | doWork2(); | | //here using join() to wait for the thread finish and then | if (holder.e != null) | { | throw holder.e; | } | } | I don't know if this is the proper way. But that's my current solution. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4247310#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...