completablefuture example

Java is a kind of object-oriented programming language that can compose Cross-platform application software. Java technology, with its superior versatility, efficiency, platform portability and security, is widely used in PCs, data centers, gaming consoles, science supercomputers, mobile phones and the Internet, and has the world's largest developer professional community. public void Serve () throws Interruptedexception, Executionexception, timeoutexception {Final futureFinal Response Response

is complete, until it is ready for us to wait and stop it. We can simply say that there is a result when we run this function. In addition, we can stack these functions, combine multiple future together and so on. For example, if we convert from string to Integer, we can move from Completablefuture to Completablefuture Copy Code code as follows:

Asynchronous timeout Processing Using CompletableFuture in Java One day, I was stuck by Future. get () When I improved multi-threaded code. public void serve() throws InterruptedException, ExecutionException, TimeoutException { final Future This is an Akka application written in Java and uses a thread pool containing 1000 threads !) -- All threads are blocked in this get. The processing speed of the system cannot keep up with the number of concurr

One day, I was stuck with future.get () when I was improving my multithreaded code.public void Serve () throws Interruptedexception, Executionexception, timeoutexception { final futureThis is a Akka application written in Java, using a thread pool with 1000 threads. )-All threads are blocking in this get (). The processing speed of the system cannot keep up with the number of concurrent requests. After the refactoring, we took out all of these threads only retained one, greatly reducing the me

Java 1.5 has a future, it is a big step forward, and then Java 1.8 to join a new implementation of the Completablefuture, from this thread and thread can be a pleasant conversation. Coordination between the first two threads I used an Object.wait()Andnotify(), Thread'sjoin()method, which is a very low-level API, whether many Java programs are not aware of their existence, or do not use them at all.If it is simple to wait for all threads to complete a

(2); if(Data! =NULL) {System.out.println ("[" + Thread.CurrentThread (). GetName () + "] Get data:" +data); } } Catch(Exception e) {e.printstacktrace (); } } } }, "Consumer-" +i). Start (); } for(inti = 0; I //2 Producers Final inttemp =i; NewThread (NewRunnable () {@Override Public voidrun () { for(intj = 0; J ) {String data= "itermis-" + temp + "-" +J; Try{TimeUnit.SECONDS.sleep (2);//slowing the pace of pr

you, the two real difference is what? In fact, it is the need for us to keep polling, non-stop people looking at. And the other is through the callback function, which is triggered by the event of the completion of the task, There is no need for us to observe. This is the difference between synchronous and asynchronous, and synchronization at a certain point still requires active access to our task thread. And asynchronously, the task thread itself tells us that we are done. That is, the real d

I. Completablefuture 1.Future Interface The purpose of the future design is to model the results that will occur at some point in time.It models an asynchronous computation that returns a reference to the result of the execution of the operation, which is returned to the caller when the operation is finished. Starting in the future those potentially time-consuming operations freed up the calling thread so that it could continue to perform other valu

easily respond to task events, build a task pipeline, and implement combined asynchronous programming. How to use it? Next we will gradually explain that CompletableFuture is also a Future. Let's first look at something similar to Future. Comparison with Future/FutureTask Basic task execution service We will first briefly review the asynchronous task execution service and Future through examples. In the asynchronous task execution service, Callable o

Python decorator use example and actual application example, python example Test 1 Deco is running, but myfunc is not running Copy codeThe Code is as follows:Def deco (func ):Print 'before func'Return func Def myfunc ():Print 'myfunc () called'Myfunc = deco (myfunc) Test 2 Call myfunc in the required deco to executeCopy codeThe Code is as follows:Def deco (func

/*====================================================================== A Globalmem Driver As an example of char device drivers There are two same globalmems in this driver This example was to introduce the function of File->private_data The initial developer of the original code is Baohua Song ======================================================================*/ #include #include #include #include #in

Remember when a friend wanted his VFP program to run this way: There is no VFP main screen (_screen), the runtime directly on the desktop, a login dialog box, enter the user name and password and verify the software after the main interface, looks like the software written in VB, a very cool feeling. The main interface of VFP software can usually be implemented in two ways: the main screen (_screen) or the top-level form (or the parent-child form). You can use the top level form to implement th

This example applies to the knowledge of the Between...and clause in the SELECT statement, referring to the SELECT statement: Select SQL command or the SQL language tutorial. This example runs the following diagram: This example uses the "Data 1" database "People information table", about the database is already looking at the case of VFP: sample database is

The concept of a single case pattern A single example pattern is a design pattern in which a class has only one object instance in the entire application. Specifically, as an object creation, the singleton pattern ensures that a class has only one instance, and instantiates it itself and provides this instance to the entire system globally. Instead of creating an instance copy, it returns a reference to an instance stored within a singleton class. C

Transferred from: http://aigo.iteye.com/blog/2301010Although the official Doc says that the event binding method is exactly the same as multi-cast usage, there are many examples on the Multi-cast forum, but the actual is different. And there is no such example on the forum. Later looked at the next Runtime/core source, the event of the binging manner as follows (attached complete steps):1, first define the custom event, in this case we define in Gamem

Example Description:1. The shelves of this example were built in 2012 for the development of real projects, and several small and medium-sized projects have been made on this shelf. There are two different versions, one for Hibernate and one for Ibatis.2. This example is a complete shelf of SSH, including basic rights management and curd examples. Rights manageme

::handle_read_content, This, Boost::asio::p laceholders::error)); } //read EOF to exit? Else if(Err! =boost::asio::error::eof) {Std::cout"Error:""\ n"; }} tcp::resolver Resolver_; Tcp::socket socket_; Boost::asio::streambuf Request_; Boost::asio::streambuf Response_;};intMainintargcChar*argv[]) { Try { if(ARGC! =3) {Std::cout"usage:async_client "; Std::cout"example:\n"; Std::cout"async_client www.boost.org/license_1_0.txt\n"; return 1;

PHP Single example mode to realize shopping cart function-php Instance tutorial complete this small function must write the need to develop good habits PHP shopping cart development requirements function is as follows 1: Shopping cart in Session 2: Single case mode to develop function: Add or delete to increase the reduction of a commodity PHP Single example mode realization shopping cart function-php

implement; Import Sshinterface.axe; Public class Implements axe{ public stoneaxe () {} public String Chop () { // TODO auto-generated Method stub return "Cut the tree with an axe";} }Spring provides applicationcontext.xml to organize the various beans:12Beans3Xmlns= "Http://www.springframework.org/schema/beans"4Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"5xmlns:p= "http://www.springframework.org/schema/p"6Xsi:schemalocation= "Http://www.springframewo

1. Define A singleton pattern ensures that a class has only one instance, and instantiates it and provides this instance to the entire system globally. Instead of creating an instance copy, it returns a reference to an instance stored within a singleton class. 2. Solve the problem/use scenario In the case of database applications, a single example pattern can be used to avoid the resources consumed by a large number of new operations.If you need a cla