Programmer Think

Deep understanding of thread pool Fork Join in concurrent programming 1, What is Fork Join Maybe junior programmers don't know what Fork Join is. Let's take a simple example to illustrate: Suppose we need to send 10W emails in groups, which method may we use? Some people may say that using threads or thread pools, each thread sends ...

catalogue Introduction to producer consumer model wait,notify scheme Implementation of ReentrantLock Implementation of blocking queue Semaphore implementation Lockless caching framework: Disruptor Note: This article refers to [Java summary] producer consumer model_ zhujohnle's column - CSDN blog Java implementation of producer consumer ...

Function of condition In fact, there are many usage scenarios of condition, which can be used in concurrent scenarios involving condition judgment, such as: Judge whether the queue is full or empty in the ArrayBlockingQueue of the blocking queueBlock and wake up all threads in CyclicBarrierJudgment of blocking access queue data in DelayQueueC ...

Involving knowledge 1. The essence of handshake and wave In fact, I think waving and shaking hands are completely confusing concepts. The change of serial number and verification number completely depends on whether you are the data sender or receiver. The data here only refers to the data carried in the application layer http, excludin ...

1, CONNECT_TIMEOUT_MILLIS Parameters belonging to socketchannelWhen the client establishes a connection, if the connection cannot be made within the specified milliseconds, a timeout exception will be thrownNote: don't use so in Netty_ Timeout is mainly used for blocking IO, while Netty is non blocking io Examples public class TimeOutTes ...

Basic concept of thread: Threads are different execution paths of the system. The following is an execution path: Each branch is a thread, and the program written before is a branch. Process: a program is a process that puts code into the code area, which is called a process Operating system scheduler Thread is a dynamic concept: multiple e ...

preface Some time ago, a new employee came to the company. He said that the new employee had been outsourcing code for one and a half years before he came to our company. Once I chatted with him about List. I casually asked him how to solve the unsafe multi-threaded concurrency of List collection when outsourcing. Unexpectedly, he looked at me ...

preface Scene description Briefly describe this step. Open three threads and call three different methods. Use the countdowncatch counter to wait for the completion of all three methods, and then merge the data Basic concepts introduce CountDownLatch is a synchronization tool class that allows one or more threads to wait until other t ...

1. Process? Thread? Multitasking? In fact, there are a lot of cool programs in each process, such as cool browser, cool video, and so on. The thread is a branch or phenomenon in the process, which is an independent execution path. A process includes at least one thread. Threads can be understood as improving the efficiency of program operation, ...

I Lock interface Lock interface is the foundation of everything. Its abstract class is a tool used to control the access of multiple threads to shared resources The following methods are provided to abstract the whole business: void lock()void lockInterruptibly() throws InterruptedException: breaks the lockboolean tryLock(): non blockin ...