Previous articles have talked about the understanding of synchronization locks. The way to implement synchronization locks is nothing more than multiple threads seizing a mutually exclusive variable. If the preemption is successful, it means that the lock has been obtained, while threads that have not obtained the lock will block and wait until the lock […]
Tag: synchronize
About Volatile, lock, Interlocked and Synchronized in multi-threaded environment
Welcome to like: Collection ?Leave a message Please correct me if there are any mistakes, give people roses, and leave lingering fragrance in your hands! Author of this article: Original by webmote Author’s motto: In the new journey, we face not only technology but also people’s hearts. People’s hearts are immeasurable, and the sea water […]
Synchronize MySQL data to Elasticsearch based on Canal
Synchronize MySQL data to Elasticsearch based on Canal Synchronize mysql data to elasticsearch based on canal. 1.canal-server For the installation of related software, please refer to: “Canal Realizes Data Synchronization” 1.1 pom dependency <?xml version=”1.0″ encoding=”UTF-8″?> <project xmlns=”http://maven.apache.org/POM/4.0.0″ xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:schemaLocation=”http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd”> <modelVersion>4.0.0</modelVersion> <groupId>com.example</groupId> <artifactId>canal-to-elasticsearch</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>canal-to-elasticsearch</name> <description>canal to elasticsearch</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.RELEASE</version> <relativePath/> […]
Hello volatile! Hello, synchronized!
This article has been published simultaneously on my personal homepage Synchronized and Volatile are two keywords used to handle multi-threaded programming in Java. They are used to implement thread synchronization and Ensure visibility. In Java multi-threaded programming, the two are complementary, not antagonistic. volatile In Java, the volatile keyword can ensure the visibility of a […]
Synchronized lock optimization for JUC concurrent programming
Table of Contents 1. Java object header 2. Synchronized lock optimization 2.1 Bias lock 2.2 Lightweight lock 2.3 Heavyweight lock 2.4 Comparison of various locks 1. Java Object Header In the HotSpot virtual machine, the layout of objects stored in memory can be divided into three areas: object header (Header), instance data (Instance Data) and […]
Performance issues caused by log4j2 synchronized logs
1. Problem review 1.1 Problem Description In the performance test of the project, as the number of concurrency of related interfaces increases, the response time of the interface becomes longer, the interface throughput no longer increases, and the CPU usage of the application is high. 1.2 Analysis ideas Who causes high CPU and blocks the […]
100 lines of python to synchronize Android and Windows LAN folders
Programming solves all problems Obsidian builds personal notes Recently I am using Obsidian to build personal cloud notes Although I used COS image bed + gitee to implement cloud backup, the Obsidian backup on Android is a little bit trouble. Fortunately, I mainly take notes on the computer, and my phone is just a reading […]
MinIO (3) Use Webhook to synchronize files in real time
Foreword In the process of using MinIO, we encountered a requirement here. The system needs to preview 3D files and perform front-end operations. Use a tool to browse 3D files to open the directory of the 3D file to achieve the online preview function. At this time, the problem arises. After MinIO uploads the file […]
synchronized implementation principle
Foreword: Introduction to synchronized The usage of Synchronized is to avoid data confusion caused by resource preemption, so that threads can be synchronized to ensure that only one thread of the synchronized object can perform value change and use operations. It is an essential part of concurrency control. Everyone knows it. Let’s dig into it […]
Use canal rabbitmq to synchronize redis data
canal [k?’n?l], translated as waterway/pipeline/ditch, its main purpose is to provide incremental data subscription and consumption based on MySQL database incremental log analysis In the early days of Alibaba, due to the deployment of dual computer rooms in Hangzhou and the United States, there was a business need for cross-computer room synchronization. The implementation method […]