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Reprinted from http://blog.csdn.net/liuhe688/article/details/6532519 stay Android There are two ways to implement asynchronous task mechanism, Handler and AsyncTask. Handler mode needs to create a new thread for each task. After the task is completed, it sends a message to the UI thread through the Handler instance to complete the updat ...

Summary: Pacemaker is a resource manager separated from heartbeat in v3 version, so pacemaker does not provide heartbeat information. Our cluster needs corosync support to be complete. The function of pacemaker is to manage the control center of the whole HA. The client configures and manages the whole cluster through pacemaker. There is also ...

1. Java way Apache ActiveMQ official instance send message Download ActiveMQ source code directly from Apache website http://activemq.apache.org/download-archives.html Download and unzip to get an example of java code Then pour in the IDE As follows: Please read the readme.md file carefully, which roughly means to type the proje ...

Preface Memory is not good, the relevant nginx problems and solutions will be expanded on the above, if there are any problems, please leave a message. Catalog Install nginx Managing nginx Configure nginx.conf nginx advantages Debug nginx Reference resources Install nginx Install gcc g + + development library environment ubunto ...

Official documents https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/quickstart-fedora.html Dependency software Before installing nagios, you need to install apache, php, gcc, gd-devel, which can be installed through yum. This article is based on the source code build LAMP architecture (build LAMP)- http://blog.csdn.net/di ...

Enter Aliyun Market Page: After login, select API. Select the SMS interface item I need on the API service page and click Enter Choose the eye-to-eye interface service. If it's a trial, choose 0 yuan/5 times. If you have money and don't worry about spending, choose 30,000 yuan/100,000 times to buy. After payment is ...

Installation and Use of Log Collection Framework Flume 1. Introduction to Flume 1.1. Overview of Flume Flume is a distributed, reliable and highly available system for collecting, transmitting and aggregating massive logs. Flume can collect files, socket data packets and other forms of source data. It can also output the collected d ...

This article describes how SpringBoot integrates MyBatis I'm sure you've learned something about Spring Boot and MyBatis by reading this article, so I'll go straight to dry. First import dependencies into POM <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-s ...

Recently, because the project needs to do data synchronization between two projects, specifically project 1's data is synchronized to project 2 through message queue, because this update operation also involves updating the data of multiple databases, so it needs the operation of switching multiple data sources. Here's how to switch data source ...

Preface In the last article, I took WordCount as an example to explain the code structure and operation mechanism of MapReduce. This article will further understand MapReduce through a few simple examples. 1. Data Retrieval Problem description Assuming there are many pieces of data, we look for statements that contain a string. Solu ...