java concurrency tutorial

. There is more discussion of this content in hunger and equity.Call Unlock () in the Finally statementIt is important to call unlock () in the finally statement if lock is used to protect the critical section and the critical section is likely to throw an exception. This ensures that the lock object can be unlocked so that other threads can continue to lock it. The following is an example:Lock.lock (); Try { //docritical sections code, //which may throw exception finally { lock.unlock

Serialization | Iot framework ServerSuperIO tutorial-17. Supports real-time databases and high-concurrency storage of measurement point data. Appendix: Release and version update instructions ., Serversuperio 1. C # Introduction to cross-platform Iot communication framework ServerSuperIO (SSIO) Serialization | Iot framework ServerSuperIO tutorial 1.4 communicatio

initializationSummary:Finally, the book is pretty much the same .... It's not easy to shout, but finally one more thing. This book probably now only understand about half, after all, only looked at once, poor translation quality for the book's reading added a lot of difficulty. In addition, the book theory is more than practice, the code practice is not much, the book has a lot of prerequisite knowledge is assumed you already know, so suitable for a certain basis of people to see. Later there i

The following information is transferred from http://tutorials.jenkov.com/java-concurrency/volatile.html (using Google Translate):The Java volatile keyword is used to mark Java variables as "stored in primary storage". More precisely, this means that each read volatile variable is read from the main memory of the compu

An article reads Java concurrency and thread security, and understands java concurrent threads I. Preface For a long time, I have been trying to analyze the essence of Java thread security. However, I had to put it on hold because I had some micro-points that I couldn't understand, all the points are connected in a ser

Java concurrency: thread pool, saturation policy, customization, expansion, java thread I. Preface When we need to use a thread, we can create a new thread and explicitly call the start () method of the thread. This is very easy to implement, but there are defects in some scenarios: if you need to execute multiple tasks at the same time (that is, the number of co

Original intention and arrangement descriptionJava high concurrent Kill system API is a Java project from the online tutorial, and I am the first project to touch Java. Originally a C # code farm, the company plans to part of the business to Java, so I use business time to self-study

A lot of information on the web when describing the Java memory model, will introduce a main memory, and then each worker thread has its own working memory. The data is in main memory and there is a copy in the working RAM. There is a variety of atomic operations between working memory and main storage to synchronize. The following figure comes from this blog But because of the evolving Java version, th

Java concurrency: Code explanation of traditional thread-synchronous communication technology, java Communication Technology This article focuses on the code example of the traditional thread synchronous communication technology of Java concurrency, which is described as fol

This article illustrates the method of C # to solve the problem of sqlite concurrency anomalies. Share to everyone for your reference, specific as follows: when you use C # to access SQLite, you often encounter problems with multiple threads concurrency that cause sqlite database corruption . SQLite is a file-level database whose locks are at the file level : Multiple threads can read at the same time, bu

false. 6. Break rules. When a thread calls interrupt on another thread, it must be executed before the interrupt call is detected by the interrupted thread. 7. Finalizer rules. The constructor of the object must be completed before the finalizer of the object is started. 8. transitivity. If operation A is performed before action B, action B is performed before Operation C, then action A must be performed before Operation C. Double check lock /** * Double check plus lock, uns

operations of lock, unlock, read, load, assign, use, store, and write are atomic, but for 64-bit data types long and double, A loose rule is defined in the model that allows the virtual machine to divide the read and write operations of 64-bit data that are not volatile-modified into two 32-bit operations. Thus, if there are multiple threads sharing a long or double type of variable that is not declared volatile, and both are read and modified, some threads may read a value that is neither the

handled by a worker Thread. That is: a total of 2 threads (the main thread, The worker thread that handles the task). For other classes, refer to the Java DOC 9 Concurrent Process ControlThis section of the example comes from a Java concurrency tutorial that is less warm and may change. Salute to the low temp

Description: With the benefits of AB, in the case of multi-concurrency, do not write your own threading simulation.Website:http://httpd.apache.org/(Apache server)http://httpd.apache.org/docs/2.0/programs/(Apache tools documentation Daquan)http://httpd.apache.org/docs/2.0/programs/ab.html (Documentation Tutorial)http://httpd.apache.org/docs/current/programs/ab.html (Documentation

Java concurrency deadlock instance, java dead instance 1 package com.thread.test.thread; 2 3 /** 4 * Created by windwant on 2016/6/3. 5 */ 6 public class MyTestDeadLock { 7 public void run() { 8 MyThread mt = new MyThread(); 9 new Thread(mt, "zhangsan").start();10 new Thread(mt, "lisi").start();11 }12 13 class MyThread impl

is mainly two: Enhance the memory semantics of volatile. The old memory model allows volatile variables to be re-ordered with ordinary variables. JSR-133 strictly restricts the reordering of volatile variables and ordinary variables, so that volatile write-read and lock-release-fetches have the same memory semantics. Enhances final memory semantics. In the old memory model, the value of reading the same final variable multiple times may be different. To do this, JSR-133 added two r

1. Curriculum development Environment The project source code is based on Go 1.4.1 and the following environments are available for projects. Development tools: Sublime3 or Liteide X30.2; Frame version involved: Beego database tools: MySQL 5.5.53 mysql Community Server (GPL) Other tools: Redis 2.6.12, Bee Tools 2. Introduction to the Content Starting with the basic Golang language syntax, this tutorial introduces the data types of Golang, including th