public class MyHandler implements IMyHandler {
	...
	@Override
	public boolean execute(final IDebugCommandRequest request) {
		...
		executeCommandA(context, request);
		...
	}
	
	// execute the first command of my service
	private void executeCommandA(final Optional<ICommandControlDMContext> context, 
			final IDebugCommandRequest request) {
		fExecutor.execute(new DsfRunnable() {
			@Override
			public void run() {
				...
				myService.doCommandA(context.get(), new DataRequestMonitor<Boolean>(fExecutor, null) {
					@Override
					protected void handleCompleted() {
						if (isSuccess()) {
							...
							executeCommandB(context, request);
						}
						request.done();
					}
				});
			}
		}
	}
	
	// execute the second command of my service
	private void executeCommandB(final Optional<ICommandControlDMContext> context, 
			final IDebugCommandRequest request) {
		fExecutor.execute(new DsfRunnable() {
			@Override
			public void run() {
				...
				myService.doCommandB(context.get(), new DataRequestMonitor<String>(fExecutor, null) {
					@Override
					protected void handleCompleted() {
						if (isSuccess()) {
							...
							executeCommandC(context, request);
						}
						request.done();
					}
				});
			}
		}
	}
	
	...