activiti5第四弹----serviceTask中的java服务任务
activiti.cfg.xml内容：
<?xml version="1.0"?> <beans default-lazy-init="false" xsi:schemaLocation=" http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans"> <bean class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration" id="processEngineConfiguration"> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activi1" /> <property name="jdbcDriver" value="com.mysql.jdbc.Driver" /> <property name="jdbcUsername" value="root" /> <property name="jdbcPassword" value="root" /> <property name="databaseSchemaUpdate" value="true" /> <property name="jobExecutorActivate" value="true" /> <property name="mailServerHost" value="mail.my-corp.com" /> <property name="mailServerPort" value="5025" /> <property name="history" value="full"></property> </bean> </beans>
方式一：使用java class来实现java服务任务
HelloService内容：
package org.mpc.final_activiti;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;
/**
*
* 作为activiti的ServiceTask的实现，必须实现JavaDelegate接口，但是不需要实现序列化接口
*
* activiti会使用反射机制将类初始化，因此在实现JavaDelegate接口的时候需要提供一个
* 无参数的构造器，否则会抛出异常。
*
* @author mpc
*
*/
public class HelloService implements JavaDelegate {
@Override
public void execute(DelegateExecution arg0) throws Exception {
System.out.println("---------------------------------------------");
System.out.println();
System.out.println("Hello Service " + this.toString()
+ "Is Saying Hello To Every One !");
System.out.println("---------------------------------------------");
System.out.println();
}
}
测试方法：
package final_activiti.progress;
import org.activiti.engine.impl.test.PluggableActivitiTestCase;
import org.activiti.engine.test.Deployment;
import org.junit.Test;
public class ServiceTask1Test extends PluggableActivitiTestCase {
@Test
@Deployment(resources = "final_activiti/progress/serviceTask_01.bpmn")
public void test() {
assertProcessEnded(runtimeService.startProcessInstanceByKey("service1")
.getId());
}
}
测试结果：
从测试结果可以看到，我们在流程中定义的连个Service task都执行了，而且可以从红线标注处看到这两个Service是不一样的，也就是说activiti在每次需要执行一个Service task 的时候都重新创建了服务对象。
方式二：使用 Delegate expression来实现java服务任务
delegate对应的java类:
package org.mpc.final_activiti;
import java.io.Serializable;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;
public class Helloservice1 implements Serializable, JavaDelegate {
/**
* 实现JavaDelegate接口，使用其中的execute方法 由于要放入流程定义中，所以要实现可序列话接口
*
*/
private static final long serialVersionUID = 5593437463482732772L;
@Override
public void execute(DelegateExecution arg0) throws Exception {
System.out.println("---------------------------------------------");
System.out.println();
System.out.println("Hello Service " + this.toString()
+ "Is Saying Hello To Every One !");
System.out.println("---------------------------------------------");
System.out.println();
}
}
测试类:
package final_activiti.progress;
import java.util.HashMap;
import java.util.Map;
import org.activiti.engine.impl.test.PluggableActivitiTestCase;
import org.activiti.engine.test.Deployment;
import org.junit.Test;
import org.mpc.final_activiti.Helloservice1;
public class ServiceTask2Test extends PluggableActivitiTestCase {
@Test
@Deployment(resources = "final_activiti/progress/serviceTask_02.bpmn")
public void test() {
//定义delegate放入流程定义中启动流程
Map<String, Object> map = new HashMap<String, Object>();
map.put("delegate", new Helloservice1());
runtimeService.startProcessInstanceByKey("service2", map);
}
}
测试结果:
结果显示两个Service task 都执行了，而且可以发现，使用的是同一个服务对象。这样更节省系统开销吧。。。
方式三：使用expression
第二个Service task 的main config内容：
myBean对应的服务类：
package org.mpc.final_activiti;
import java.io.Serializable;
import org.activiti.engine.runtime.Execution;
/**
*
* 不需要实现javadelegate，但是由于要放入到流程定义中，所以需要实现可序列话接口
*
*
*/
public class HelloService2 implements Serializable {
private static final long serialVersionUID = 2356L;
private String name = "test_mpc";
/**
* @Title: getName
* @Description: 这里的get方法是必要的，因为在流程中直接使用对象.属性的方式调用属性的话，就相当于调用这里的get方法
* @param @return 设定文件
* @return String 返回类型
* @throws
* @author mpc
*/
public String getName() {
return name;
}
public void print(Execution ex) {
System.out.println("This is HellService2 Called by process "
+ ex.getId() + "who's saying hello ! ");
}
}
测试类:
package final_activiti.progress;
import java.util.HashMap;
import java.util.Map;
import org.activiti.engine.impl.test.PluggableActivitiTestCase;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.test.Deployment;
import org.junit.Test;
import org.mpc.final_activiti.HelloService2;
public class ServiceTask3Test extends PluggableActivitiTestCase {
@Test
@Deployment(resources = "final_activiti/progress/serviceTask_03.bpmn")
public void test() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("myBean", new HelloService2());
ProcessInstance pi = runtimeService.startProcessInstanceByKey(
"service3", map);
String s = (String) runtimeService.getVariable(pi.getId(), "myVar");
assertTrue("test_mpc".equals(s));
taskService.complete(taskService.createTaskQuery().singleResult()
.getId());
assertProcessEnded(pi.getId());
}
}
测试结果:
