Github. IO/Distributed Task Scheduling XXL-…
Introduction to the
Xxl-job is a lightweight distributed task scheduling platform. Its core design goals are rapid development, simple learning, lightweight and easy to expand. It is now open source and available to multiple companies online product lines, right out of the box.
The official documentation is perfect, so I don’t need to go into detail. This article is mainly to build XXL-JOB and simple use of records.
Set up the XXL-job-admin management end
Runtime environment
- Ubuntu 16.04 64
- Mysql 5.7
Mysql installation
$ sudo apt-get update
$ sudo apt-get install mysql-server
Mysql > set password policy, password policy, password policy
$ mysql_secure_installation
Configure remote access
$ sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
bind-address = 0.0.0.0 $sudo service mysql restart $sudo service mysql status ● mysql.service -mysql Community Server Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2019-06-05 13:23:41 HKT; 45s ago ...Copy the codeCreating a database
$ mysql -u root -p
mysql> CREATE database if NOT EXISTS `xxl-job` default character set utf8 collate utf8_general_ci;
Copy the codeCreate a user
$ mysql -u root -p
mysql> CREATE USER 'xxl-job'@The '%' IDENTIFIED BY 'xxlJob2019@';
mysql> GRANT ALL PRIVILEGES ON `xxl-job`.* TO 'xxl-job'@The '%';
Copy the codeTest XXL-job-admin locally
Pull the latest source code
$ git clone [email protected]:xuxueli/xxl-job.git
$ cd xxl-job
Copy the codeImport the project
I am familiar with Idea development tools, so here I use Idea Gradle project to demonstrate.
Open XXL-Job, and the project structure is as follows
Test project
Open the XXL – job – admin/resources/application properties, modify the mysql connection information
# # # XXL - job, datasource spring. The datasource. Url = JDBC: mysql: / / 192.168.32.129:3306 / XXL - job? Unicode=true&characterEncoding=UTF-8 spring.datasource.username=xxl-job spring.datasource.password=xxlJob2019@Copy the codeRun the /xxl-job/doc/db/ tables_XXl_job. SQL command to initialize the database. The following figure shows the initialization
Ready, you can start the project, and then open the address http://localhost:8080/xxl-job-admin will see the home page
The deployment of
Packing dispatch center
$ cd/xxl-job $ mvn install ... [INFO] xxl-job ............................................ SUCCESS [s] 0.513 [INFO] XXL - job - the core... SUCCESS [s] 4.258 [INFO] XXL - job - admin... SUCCESS [s] 5.525 [INFO] XXL - job - executor - samples... SUCCESS [s] 0.016 [INFO] XXL - job - executor - sample - spring... SUCCESS [s] 2.188 [INFO] XXL - job - executor - sample - springboot... SUCCESS [s] 0.892 [INFO] XXL - job - executor - sample - jfinal... SUCCESS [s] 1.753 [INFO] XXL - job - executor - sample - nutz... SUCCESS [s] 1.316 [INFO] XXL - job - executor - sample - frameless... SUCCESS [s] 0.358 [INFO] XXL - job - executor - sample - jboot... SUCCESS [s] 1.279 [INFO] -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 18.549s [INFO] Finished at: 2019-06-05T14:40:25+08:00 [INFO] ------------------------------------------------------------------------Copy the codeThe jar file xxl-job-admin-2.1.0-snapshot. jar is stored in the/xxL-job/xxL-job-admin directory
Deploying to a server
$ sudo apt install openjdk-8-jdk
$ java -version
openjdk version "1.8.0 comes with _212"OpenJDK Runtime Environment (build 1.8.0_212-8u212-b03-0Ubuntu1.16.04.1-b03) OpenJDK 64-bit Server VM (build 25.212-b03, mixed mode) $ sudo mkdir -p /data/xxl-job $ sudocd /data/xxl-job
Upload our packaged JAR to this directory and add a soft link
$ sudo ln -sXXL - job - admin - 2.1.0 - the SNAPSHOT. Jar current. The jar## Register as system service, can achieve the purpose of abnormal restart, startup and so on
$ sudo vim /etc/systemd/system/xxl-job.service
Description=xxl-job Service Daemon
After=mysql.service
[Service]
Type=simple
Environment="JAVA_OPTS= -Xmx1024m -Xms1024m -XX:+UseG1GC -XX:MaxGCPauseMillis=200 -XX:NewRatio=3"
ExecStart=java -jar /data/xxl-job/current.jar
Restart=always
WorkingDirectory=/data/xxl-job/
[Install]
WantedBy=multi-user.target
$ sudo systemctl enableService $sudo service xxL-job start $sudo service xxL-job status ● Loaded: loaded (/etc/systemd/system/xxl-job.service; enabled; vendor preset: enabled) Active: active (running) since Wed 2019-06-05 15:30:08 HKT; 2min 34s ago ...Copy the codeWe visit http://192.168.32.129:8080/xxl-job-admin:
Test Task scheduling
Above, our task scheduling management end has been set up. Next, let’s test the task scheduling.
Use the built-in SpringBoot test project xxL-job-executor-Sample-SpringBoot to test and modify the configuration file
XXL - job - executor - sample - springboot = http://192.168.32.129:8080/xxl-job-adminCopy the codeCustom Tasks
Write a simple task that prints the current sequence 100 times
package com.xxl.job.executor.service.jobhandler;
import com.xxl.job.core.biz.model.ReturnT;
import com.xxl.job.core.handler.IJobHandler;
import com.xxl.job.core.handler.annotation.JobHandler;
import com.xxl.job.core.log.XxlJobLogger;
import org.springframework.stereotype.Component;
import java.util.concurrent.TimeUnit;
/**
* TODO
*
* @author gaochen
* @date2019/6/5 * /
@JobHandler(value="gcddJobHandler")
@Component
public class GcddJobHandler extends IJobHandler {
@Override
public ReturnT<String> execute(String param) throws Exception {
for (int i = 0; i < 100; i++) {
XxlJobLogger.log("XXL-JOB, print " + i);
TimeUnit.SECONDS.sleep(1);
}
returnSUCCESS; }}Copy the codeStarter actuator
Then start the executor, and when the startup is complete, we will find that the list of executors on the administration page will be more than the one we just started
Add tasks
View task execution logs
As you can see, the task has been executed successfully according to our plan, which is very convenient.
conclusion
For more details, please visit xxL-Job’s official website