XXL Job Core framework application examples in detail

XXL job is a lightweight distributed task scheduling framework, which is widely used in large -scale task scheduling scenarios.This article will introduce the application example of the XXL Job Core framework in detail and provide a related Java code example. 1. Introduction to XXL job core framework XXL Job Core is the core component of the entire XXL Job framework, which is responsible for the scheduling and execution of the task.Its working mechanism is as follows: 1. Swatching center register the task information into the core, including the dispatching strategy of the task, the type of trigger, the actuator information, etc. 2. Core determines when the task is triggered by the task scheduling strategy and trigger type. 3. According to the scheduling information, Core selects the right actuator for task execution. 4. The actuator executes the task and returns the execution result to the core. 5. Core updates the status and execution log according to the execution results. 2. Application example of XXL Job Core framework Let ’s take a simple timing task as an example to introduce the application example of the XXL job core framework. 1. Create a task actuator public class MyJobExecutor extends IJobHandler { @Override public ReturnT<String> execute(String param) throws Exception { // Task logic code System.out.println("Hello, XXL Job!"); return ReturnT.SUCCESS; } } 2. Registered task to dispatch center public class JobRegistry { public static void registerJob() { XxlJobScheduler scheduler = new XxlJobScheduler(); scheduler.setAppName("MyJobApp"); scheduler.setIp("127.0.0.1"); scheduler.setPort(8080); // Create CRON timing trigger CronJobTrigger trigger = new CronJobTrigger(); trigger.setcron ("0 0/1 * * * *?"); // Perform every minute // Create task information XxlJobInfo jobInfo = new XxlJobInfo(); jobInfo.setJobGroup(1); jobInfo.setJobCron(trigger.getCron()); jobInfo.setJobDesc("MyJobDesc"); jobInfo.setExecutorHandler("myjob.MyJobExecutor"); // Register task to dispatch center ReturnT<String> registerResult = scheduler.registry(jobInfo); System.out.println(registerResult.getMsg()); } } 3. Start scheduling center public class JobCenter { public static void start() { XxlJobExecutor executor = new XxlJobExecutor(); executor.setAdminAddresses("http://127.0.0.1:8080/xxl-job-admin"); executor.setAppName("MyJobApp"); executor.setIp("127.0.0.1"); executor.setPort(8080); executor.setAccessToken(null); // Start scheduling center executor.start(); } public static void main(String[] args) { start(); JobRegistry.registerJob(); } } In the above code, first of all, we created a custom task actuator `myjobexecutor`, inherited from the` ijobhandler`.The logical code of the task is written in the `Execute` method. Next, we use the `jobgistry` class to register the task to the dispatch center.In the `registerJob` method, we created a CRON timing trigger, setting the task scheduling strategy to execute once a minute.Then, we created a task information object, setting up related attributes, including the group's grouping, trigger type, and actuator information.Finally, register the task to the dispatch center by calling the method by calling the `Scheduler.regization (jobinfo) method. Finally, we start the scheduling center in the `Jobcenter` class, and call the method to register the task to the scheduling center in the method of registering the center.After performing the above code, you can see the task in the web interface of the XXL JOB, and the task will be executed regularly according to the scheduling strategy we defined. The above is a simple application example of the XXL job core framework. Through this instance, we can briefly understand the working principle and basic usage of the XXL Job framework.For complex task scheduling scenarios, XXL JOB provides rich functions and expansion points to meet various needs.