CompletableFuture

CompletableFuture In Java8
	
  
	So for above example if we want to execute in multithreading env using ThreadPool we have to implement the code like this.
	
	try{
		Future<Order> future = service.submit(getOrderTask());
		Order order = future.get();
	
		Future<Order> future1 = service.submit(enrichTask(order));
		Order order = future1.get();
		
		Future<Order> future2 = service.submit(performPaymentTask(order));
		Order order = future2.get();
		
		Future<Order> future3 = service.submit(dispatchTask(order));
		Order order = future3.get();
		
		Future<Order> future4 = service.submit(sendEmailTask(order));
		Order order = future4.get();
		
	}
	catch(InterruptedException | ExecutionException e)
	{
		e.printStackTrace();
	}


To Overcome this problem ComopletableFuture is introduced.

CompltableFutrue.supplyAsync(() ->getOrder())
	.thenApply(order->enrich(order))
	.thenApply(order->performPayment(order))
	.thenApply(order->dispatch(order))
	.thenapply(ordre->sendEmail(order));
}
}