Activiti 5.3：配置與Spring整合

Activiti 5.3與Spring整合也比較簡單，其基本思想就是，通過Spring的IOC容器來管理Activiti的流程引擎實例以及相關服務，可見，主要是基於Activiti在與Spring整合上努力上，做好配置即可。這裏基於前面的<receiveTask>的例子來進行，可以參考：Activiti 5.3：流程活動自動與手工觸發執行，簡單的流程，如圖所示：

Activiti 5.3與Spring整合，默認使用的配置文件爲activiti-context.xml，當然可以在實際使用的時候覆蓋掉默認的配置，或者增加自己的其他的Spring的配置。

我們也命名爲activiti-context.xml，內容（安裝Activiti 5.3的時候，實例工程中已經附帶）如下所示：

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="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"> <bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> <property name="driverClass" value="org.h2.Driver" /> <property name="url" value="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000" /> <property name="username" value="sa" /> <property name="password" value="" /> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration"> <property name="dataSource" ref="dataSource" /> <property name="transactionManager" ref="transactionManager" /> <property name="databaseSchemaUpdate" value="true" /> <property name="mailServerHost" value="localhost" /> <property name="mailServerPort" value="5025" /> <property name="jpaHandleTransaction" value="true" /> <property name="jpaCloseEntityManager" value="true" /> <property name="jobExecutorActivate" value="false" /> </bean> <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean"> <property name="processEngineConfiguration" ref="processEngineConfiguration" /> </bean> <bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" /> <bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" /> <bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" /> <bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" /> <bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" /> </beans>

這裏面，我把Activiti 5.3默認工程中有關JPA的部分配置刪除了，其實通過這個就可以初始化Activiti引擎實例。爲了測試方便，將獲取服務的實現抽象出來，同時使用Spring自帶的與JUnit4集成的工具（AbstractTransactionalJUnit4SpringContextTests）。我們的實現類爲AbstractSpringTest，代碼如下所示：

package org.shirdrn.workflow.activiti; import java.util.logging.Logger; import org.activiti.engine.HistoryService; import org.activiti.engine.ManagementService; import org.activiti.engine.ProcessEngine; import org.activiti.engine.RepositoryService; import org.activiti.engine.RuntimeService; import org.activiti.engine.TaskService; import org.junit.After; import org.junit.Before; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.AbstractTransactionalJUnit4SpringContextTests; /** * @author shirdrn */ @ContextConfiguration("classpath:activiti-context.xml") public abstract class AbstractSpringTest extends AbstractTransactionalJUnit4SpringContextTests { @SuppressWarnings("unused") private final Logger log = Logger.getLogger(AbstractSpringTest.class.getName()); @SuppressWarnings("unused") @Autowired private ProcessEngine processEngine; @Autowired protected RepositoryService repositoryService; @Autowired protected RuntimeService runtimeService; @Autowired protected TaskService taskService; @Autowired protected HistoryService historyService; @Autowired protected ManagementService managementService; protected String deploymentId; public AbstractSpringTest() { super(); } @Before public void initialize() throws Exception { beforeTest(); } @After public void clean() throws Exception { afterTest(); } protected abstract void beforeTest() throws Exception; protected abstract void afterTest() throws Exception; }

上面，將classpath:activiti-context.xml在測試的時候進行加載，這樣，在測試的子類中，只需要將其他的相關Spring配置單獨加載即可，業務配置與流程配置分開，便於維護。

具體測試用例，這裏實現了一個簡單的Spring Bean，配置文件爲mySpringContext.xml，如下所示：

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="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"> <bean id="mySpringBean" class="org.shirdrn.workflow.activiti.spring.MySpringBean"> <property name="id" value="65536" /> <property name="name" value="shirdrn" /> </bean> </beans>

Spring Bean的實現，代碼如下所示：

package org.shirdrn.workflow.activiti.spring; import java.io.Serializable; public class MySpringBean implements Serializable { private static final long serialVersionUID = 1L; private Integer id; private String name; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "MySpringBean[id="+ id + ",name=" + name + "]"; } }

下面，看看我們具體的測試用例，實現代碼如下所示：

package org.shirdrn.workflow.activiti.spring; import java.util.HashMap; import java.util.List; import java.util.Map; import org.activiti.engine.repository.Deployment; import org.activiti.engine.runtime.Execution; import org.activiti.engine.runtime.ProcessInstance; import org.junit.Test; import org.shirdrn.workflow.activiti.AbstractSpringTest; import org.shirdrn.workflow.activiti.subprocess.Merchant; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; /** * @author shirdrn */ @ContextConfiguration({ "classpath:org/shirdrn/workflow/activiti/spring/mySpringContext.xml"}) public class ActivitiWithSpringTest extends AbstractSpringTest { @Autowired private MySpringBean mySpringBean; @Override protected void beforeTest() throws Exception { Deployment deployment = repositoryService .createDeployment() .addClasspathResource( "diagrams/Task.ReceiveTask.bpmn20.xml") .deploy(); deploymentId = deployment.getId(); } @Override protected void afterTest() throws Exception { repositoryService.deleteDeployment(deploymentId, true); } @Test public void triggerMyProcess() { // prepare data packet Map<String, Object> variables = new HashMap<String, Object>(); Map<String, Object> subVariables = new HashMap<String, Object>(); variables.put("maxTransCount", 1000000); variables.put("merchant", new Merchant("ICBC")); variables.put("protocol", "UM32"); variables.put("repository", "10.10.38.99:/home/shirdrn/repository"); variables.put("in", subVariables); variables.put("out", new HashMap<String, Object>()); // start process instance ProcessInstance pi = runtimeService.startProcessInstanceByKey("MyReceiveTask", variables); assert (pi!=null); List<Execution> executions = runtimeService.createExecutionQuery().list(); assert (executions.size()==1); Execution execution = runtimeService.createExecutionQuery().singleResult(); runtimeService.setVariable(execution.getId(), "type", "receiveTask"); runtimeService.signal(execution.getId()); executions = runtimeService.createExecutionQuery().list(); assert (executions.size()==1); execution = executions.get(0); runtimeService.setVariable(execution.getId(), "oper", mySpringBean.getName()); runtimeService.signal(execution.getId()); } }

運行程序，結果信息如下所示：

011-3-23 18:21:28 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [activiti-context.xml] 2011-3-23 18:21:29 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions 信息: Loading XML bean definitions from class path resource [org/shirdrn/workflow/activiti/spring/mySpringContext.xml] ... ... 2011-3-23 18:21:33 org.shirdrn.workflow.activiti.task.CheckBankReceiveTask execute 信息: i am CheckBankReceiveTask. in : {protocol=UM32, repository=10.10.38.99:/home/shirdrn/repository, merchant=Merchant[ICBC], maxTransCount=1000000, in={}, out={}} 2011-3-23 18:21:33 org.shirdrn.workflow.activiti.task.CheckMerchantReceiveTask execute 信息: i am CheckMerchantReceiveTask. in : {protocol=UM32, repository=10.10.38.99:/home/shirdrn/repository, merchant=Merchant[ICBC], maxTransCount=1000000, type=receiveTask, in={}, out={}

上述一部分是加載Spring配置，一部分是流程執行信息。