上篇我们讲了通过接口方式去调用任务执行，在介绍camunda的任务之前，我们先说说任务的实现，从modeler可以看到，实现方式，主要分为5种

• Java Class
• Expression
• Delegate Exoression
• External
• Connector

1.Java Class

public class SendTaskDelegate implements JavaDelegate {
    @Override
    public void execute(DelegateExecution execution) throws Exception {
        System.out.println("java class test");
    }
}

 

@Component(value = "taskExpression")
public class TaskExpression {
    public String test(){
        System.out.println("expression test");
        return "express";
    }
}

 

 

@Component(value = "taskDelegate")
public class SendTaskDelegate implements JavaDelegate {
    @Override
    public void execute(DelegateExecution execution) throws Exception {
        System.out.println("java class test");
    }
}

 

@PostMapping("external-tasks")
public void externalTask(){
    List<LockedExternalTask> lockedExternalTasks =  externalTaskService.fetchAndLock(10,"testExternalTaskId").topic("ExternalTopic",60L*1000).execute();
    lockedExternalTasks.forEach(t->{
        System.out.println("external task test");
        externalTaskService.complete(t.getId(),"testExternalTaskId");
    });
}

 

 

<dependency>
    <groupId>org.camunda.bpm</groupId>
    <artifactId>camunda-engine-plugin-connect</artifactId>
</dependency>
<dependency>
    <groupId>org.camunda.connect</groupId>
    <artifactId>camunda-connect-http-client</artifactId>
</dependency>
<dependency>
    <groupId>org.camunda.bpm</groupId>
    <artifactId>camunda-engine-plugin-spin</artifactId>
</dependency>
<dependency>
    <groupId>org.camunda.spin</groupId>
    <artifactId>camunda-spin-dataformat-json-jackson</artifactId>
</dependency>

 

@GetMapping("connector")
public String connector(){
    System.out.println("connector test");
    return "connector";
}