XXL Job Core Framework Introduction: Core in the Giant Mission in the Java Class Library
XXL Job Core Framework Introduction: Core in the Giant Mission in the Java Class Library
Overview:
XXL Job Core is a Java -based task scheduling framework, which aims to solve the problem of large -scale task scheduling.It provides reliable, efficient and easy -to -use functions, and provides a solution for Java developers to deal with huge tasks.This article will introduce the characteristics, usage, and application examples of the XXL job core framework, and provide the corresponding Java code example.
characteristic:
1. Distributed task scheduling: XXL Job Core framework supports distributed task scheduling, which can realize the scheduling and execution of large -scale tasks in the cluster environment.
2. Diverse task types: support a variety of task types such as simple tasks, timing tasks, and CRON tasks, and can be flexibly selected according to different needs.
3. Visual web management interface: provides an intuitive and friendly web management interface to facilitate users to create, schedule, monitor and manage tasks.
4. Asynchronous execution: Support the asynchronous execution of the task, you can return immediately after submitting the task without waiting for the task to complete.
5. Failure retry mechanism: When the task execution fails, the XXL job core framework can be retrieved according to the user configuration to ensure the reliability and stability of the task.
6. Alarm and monitoring: Provide alarm and monitoring function of task execution status, and timely discover and deal with the abnormalities of task execution.
7. Group grouping and dynamic addition: The group and dynamic adding actuators can be configured on demand to facilitate the execution of tasks.
usage:
The following is the basic step of using the XXL job core framework for task scheduling:
1. Introduction dependencies:
Add XXL job core to the project configuration file, such as Maven: Maven:
<dependency>
<groupId>com.xuxueli</groupId>
<artifactId>xxl-job-core</artifactId>
<version>2.3.0</version>
</dependency>
2. Create tasks:
Implement a task class inherited from the Ijobhandler interface and implement the Execute method. This method is the execution logic of the task.For example:
public class MyJobHandler extends IJobHandler {
@Override
public ReturnT<String> execute(String param) throws Exception {
// Task execution logic
// ...
return ReturnT.SUCCESS;
}
}
3. Registration task:
Register the task through annotations, such as:
@JobHandler(value="myJobHandler")
@Component
public class MyJobHandler extends IJobHandler {
// ...
}
4. Create a scheduler:
Create and initialize the scheduler with the JobscheDuler class, such as:
JobScheduler scheduler = new JobScheduler();
scheduler.init();
5. Add task:
Add tasks to the scheduler, the execution time and performer of the specified task, such as:
XxlJobInfo jobInfo = new XxlJobInfo();
jobInfo.setJobGroup(1);
jobInfo.setJobCron("0 0/1 * * * ?");
jobInfo.setExecutorHandler("myJobHandler");
Jobinfo.SetexecutorParam ("parameter");
scheduler.addJob(jobInfo);
6. Start the task:
Start the scheduler and start the task scheduling, such as:
scheduler.start();
Example:
Below is a simple example, showing how to use the XXL job core framework for task scheduling and execution.
@JobHandler(value="myJobHandler")
@Component
public class MyJobHandler extends IJobHandler {
@Override
public ReturnT<String> execute(String param) throws Exception {
System.out.println ("During task execution, parameters:" + param);
// Execute specific task logic
return ReturnT.SUCCESS;
}
}
public class Main {
public static void main(String[] args) {
// Create a scheduler
JobScheduler scheduler = new JobScheduler();
// Initialize scheduler
scheduler.init();
// Create tasks
XxlJobInfo jobInfo = new XxlJobInfo();
jobInfo.setJobGroup(1);
jobInfo.setJobCron("0 0/1 * * * ?");
jobInfo.setExecutorHandler("myJobHandler");
Jobinfo.SetexecutorParam ("parameter");
// Add task
scheduler.addJob(jobInfo);
// Start the task
scheduler.start();
}
}
In the example, the task Myjobhandler executes once a minute, prints the parameters in the execution, and returns successfully.
Summarize:
XXL job core is a powerful and easy -to -use Java task scheduling framework, which provides solutions for the scheduling and execution of large -scale tasks.It supports distributed task scheduling, multiple task types, visual web management interfaces, etc., and provides corresponding code examples for developers for reference and use.By using XXL Job Core, developers can easily handle and manage complex task scheduling scenes.
