public void shutdown() {
        if (executor != null) {
            executor.shutdownNow();
            executor = null;
        }

        if (timer != null) {
            timer.cancel();
            timer = null;
        }
    }
public void shutdown() {
        if (executor != null) {
            executor.shutdownNow();
            executor = null;
        }

        if (timer != null) {
            timer.cancel();
            timer = null;
        }
    }
public void shutdown ( ) { if ( executor != null ) { executor . shutdownNow ( ) ; executor = null ; } if ( timer != null ) { timer . cancel ( ) ; timer = null ; } }
Shuts down the task engine service.
Shuts down the task engine service .