Activiti-04-.Spring integration

ProcessEngineFactoryBean

<beanid="processEngineConfiguration"class="org.activiti.spring.SpringProcessEngineConfiguration">
    ...
</bean>
  
<beanid="processEngine"class="org.activiti.spring.ProcessEngineFactoryBean">
  <property name="processEngineConfiguration"ref="processEngineConfiguration"/>
</bean>

Transactions

<beansxmlns="http://www.springframework.org/schema/beans" 
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
                           http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

  <beanid="dataSource"class="org.springframework.jdbc.datasource.SimpleDriverDataSource">
    <propertyname="driverClass"value="org.h2.Driver"/>
    <propertyname="url"value="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000"/>
    <propertyname="username"value="sa"/>
    <propertyname="password"value=""/>
  </bean>

  <beanid="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <propertyname="dataSource"ref="dataSource"/>
  </bean>
  
  <beanid="processEngineConfiguration"class="org.activiti.spring.SpringProcessEngineConfiguration">
    <propertyname="dataSource"ref="dataSource"/>
    <propertyname="transactionManager"ref="transactionManager"/>
    <propertyname="databaseSchemaUpdate"value="true"/>
    <propertyname="jobExecutorActivate"value="false"/>
  </bean>
  
  <beanid="processEngine"class="org.activiti.spring.ProcessEngineFactoryBean">
    <propertyname="processEngineConfiguration"ref="processEngineConfiguration"/>
  </bean>
  
  <beanid="repositoryService"factory-bean="processEngine"factory-method="getRepositoryService"/>
  <beanid="runtimeService"factory-bean="processEngine"factory-method="getRuntimeService"/>
  <beanid="taskService"factory-bean="processEngine"factory-method="getTaskService"/>
  <beanid="historyService"factory-bean="processEngine"factory-method="getHistoryService"/>
  <beanid="managementService"factory-bean="processEngine"factory-method="getManagementService"/>

...

<beans>  
  ...
  <tx:annotation-driventransaction-manager="transactionManager"/>

  <beanid="userBean"class="org.activiti.spring.test.UserBean">
    <propertyname="runtimeService"ref="runtimeService"/>
  </bean>

  <beanid="printer"class="org.activiti.spring.test.Printer"/>

</beans>

第一步： 构造Spring Context

ClassPathXmlApplicationContext applicationContext = 
    new ClassPathXmlApplicationContext("org/activiti/examples/spring/SpringTransactionIntegrationTest-context.xml");
或者

@ContextConfiguration("classpath:org/activiti/spring/test/transaction/SpringTransactionIntegrationTest-context.xml")

第二步：获取service bean并调用它的方法

RepositoryService repositoryService =(RepositoryService) applicationContext.getBean("repositoryService");
String deploymentId = repositoryService
  .createDeployment()
  .addClasspathResource("org/activiti/spring/test/hello.bpmn20.xml")
  .deploy()
  .getId();
    

也可以以下面方式使用bean

UserBean userBean =(UserBean) applicationContext.getBean("userBean");
userBean.hello();

user bean的代码

publicclassUserBean{

  /** injected by Spring */
  privateRuntimeService runtimeService;

  @Transactional
  publicvoid hello(){
    // here you can do transactional stuff in your domain model
    // and it will be combined in the same transaction as 
    // the startProcessInstanceByKey to the Activiti RuntimeService
    runtimeService.startProcessInstanceByKey("helloProcess");
  }
  
  publicvoid setRuntimeService(RuntimeService runtimeService){
    this.runtimeService = runtimeService;
  }
}

Expressions

 Spring配置片段

<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
  ...
  <property name="beans">
    <map>
      <entry key="printer" value-ref="printer" />
    </map>
  </property>
</bean>
  
  <bean id="printer" class="org.activiti.examples.spring.Printer" />

在流程定义文件中使用 spring.xml中的bean的方法的写法

<definitions id="definitions" ...>
  
  <process id="helloProcess">
  
    <startEvent id="start" />
    <sequenceFlow id="flow1" sourceRef="start" targetRef="print" />
    
    <serviceTask id="print" activiti:expression="#{printer.printMessage()}" />
    <sequenceFlow id="flow2" sourceRef="print" targetRef="end" />
    
    <endEvent id="end" />
    
  </process>

</definitions>

public class Printer {

  public void printMessage() {
    System.out.println("hello world");
  }
}

<beans ...>
  ...

  <bean id="printer" class="org.activiti.examples.spring.Printer" />

</beans>

Automatic resource deployment

 集成Spring对部署资源也有特性，在流程引擎配置中，你可以指定一系列资源，当流程引擎呗创建时，所有的资源被扫描部署。有一个过滤器负责阻止多次部署，只有当资源呗改变时才会部署到Activiti DB中。这就意味着在多数用例中，Spring容器经常被重启.  如下例子：

<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
  ...
  <property name="deploymentResources" value="classpath*:/org/activiti/spring/test/autodeployment/autodeploy.*.bpmn20.xml" />
</bean>
  
<bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
  <property name="processEngineConfiguration" ref="processEngineConfiguration" />
</bean>

下面是基于Spring的测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:org/activiti/spring/test/junit4/springTypicalUsageTest-context.xml")
public class MyBusinessProcessTest {
  
  @Autowired
  private RuntimeService runtimeService;
  
  @Autowired
  private TaskService taskService;
  
  @Autowired
  @Rule
  public ActivitiRule activitiSpringRule;
  
  @Test
  @Deployment
  public void simpleProcessTest() {
    runtimeService.startProcessInstanceByKey("simpleProcess");
    Task task = taskService.createTaskQuery().singleResult();
    assertEquals("My Task", task.getName());
  
    taskService.complete(task.getId());
    assertEquals(0, runtimeService.createProcessInstanceQuery().count());
   
  }
}      
  

为了能够执行，还需要下面的

<bean id="activitiRule" class="org.activiti.engine.test.ActivitiRule">
  <property name="processEngine" ref="processEngine" />
</bean>