1.写在前面:
activiti中并发后的活动任务节点通过runtimeService.getActiveActivityIds(String proInstId)得到。
这个方法在Activiti的doc文档中介绍的不对,它错把参数写成了executionId,而事实上,一个流程实例(对应流程实例编号ProInstId)在运行中通过并发节点产生多个执行任务(对应执行编号executionId)。
2.关键代码:
ProcessInstanceAction.java
public class ProcessInstanceAction extends BaseAction {
private List<ActivityImpl> actImpls = new ArrayList<ActivityImpl>();
public List<ActivityImpl> getActImpls() {
return actImpls;
}
public void setActImpls(List<ActivityImpl> actImpls) {
this.actImpls = actImpls;
}
/**
* 显示流程图
*
* @return
* @throws Exception
*/
public String getProcessPic() throws Exception {
// String taskId =
// "2901";//getRequest().getParameter("taskId");3016,552,3020
String procDefId = getRequest().getParameter("procDefId");
ProcessDefinition procDef = repositoryService
.createProcessDefinitionQuery().processDefinitionId(procDefId)
.singleResult();
String diagramResourceName = procDef.getDiagramResourceName();
InputStream imageStream = repositoryService.getResourceAsStream(procDef
.getDeploymentId(), diagramResourceName);
getRequest().setAttribute("inputStream", imageStream);
return SUCCESS;
}
/**
* 获取跟踪信息
*
* @return
* @throws Exception
*/
public String getProcessMap() throws Exception {
String procDefId = getRequest().getParameter("procDefId");
String proInstId = getRequest().getParameter("procInstId");
ProcessDefinition processDefinition = repositoryService
.createProcessDefinitionQuery().processDefinitionId(procDefId)
.singleResult();
ProcessDefinitionImpl pdImpl = (ProcessDefinitionImpl) processDefinition;
String processDefinitionId = pdImpl.getId();// 流程标识
ProcessDefinitionEntity def = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService)
.getDeployedProcessDefinition(processDefinitionId);
List<ActivityImpl> activitiList = def.getActivities();// 获得当前任务的所有节点
/**获取活动任务start**/
List<String> ActiveActivityIds = runtimeService
.getActiveActivityIds(proInstId);//获取将被执行的活动节点
for (String activeId : ActiveActivityIds) {
for (ActivityImpl activityImpl : activitiList) {
String id = activityImpl.getId();
if (activityImpl.isScope()) {//判断节点是否为subProcess
if (activityImpl.getActivities().size() > 1) {
List<ActivityImpl> subAcList = activityImpl
.getActivities();
for (ActivityImpl subActImpl : subAcList) {
String subid = subActImpl.getId();
if (activeId.equals(subid)) {// 获得执行到的活动节点
actImpls.add(subActImpl);
break;
}
}
}
}
if (activeId.equals(id)) {// 获得执行到的活动节点
actImpls.add(activityImpl);
}
}
}
/**获取活动任务end**/
getRequest().setAttribute("procDefId", procDefId);
/**这个参数通过前台的showImg.jsp传给getProcessPic.action获取流程图**/
return SUCCESS;
}
}
pic.jsp
<%@page import="java.io.InputStream"%>
<%@page import="org.activiti.engine.impl.*"%>
<%@page import="org.activiti.engine.impl.pvm.*"%>
<%@page import="org.activiti.engine.impl.pvm.process.*"%>
<%@page import="org.activiti.engine.repository.*"%>
<%@page import="org.activiti.engine.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
InputStream is = (InputStream)request.getAttribute("inputStream");
byte[] b = new byte[1024];
int len = -1;
while((len = is.read(b, 0, 1024)) != -1) {
response.getOutputStream().write(b, 0, len);
// 防止异常:getOutputStream() has already been called for this response
out.clear();
out = pageContext.pushBody();
}
%>
showImg.jsp
<%@page import="java.io.InputStream"%>
<%@page import="org.activiti.engine.impl.*"%>
<%@page import="org.activiti.engine.impl.pvm.*"%>
<%@page import="org.activiti.engine.impl.pvm.process.*"%>
<%@page import="org.activiti.engine.repository.*"%>
<%@page import="org.activiti.engine.*"%>
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title></title>
</head>
<body>
<div >
<img src="getProcessPic.action?procDefId=${procDefId}" style="position:absolute; left:0px; top:0px;">
<s:iterator value="actImpls">
<!-- 给执行的节点加框 -->
<div style="position:absolute; border:2px solid red;left:${x-1 }px;top:${y-1 }px;width:${width }px;height:${height }px;"></div>
</s:iterator>
</div>
</body>
</html>
另附:环境配置struts+activiti+spring:
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.objectFactory.spring.autoWire" value="name" />
<constant name="struts.objectFactory" value="spring" />
<package name="default" extends="struts-default">
<action name="getProcessPic" class="processInstanceAction" method="getProcessPic">
<result name = "success" >/incident/pic.jsp</result>
</action>
<action name="getProcessMap" class="processInstanceAction" method="getProcessMap">
<result name = "success" >/incident/showImg.jsp</result>
</action>
</package>
</struts>
applicationContext.xml
<?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">
<context:component-scan base-package="org.activiti.spring.test.jpa"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/acitivitiexample?autoReconnect=true" />
<property name="username" value="root" />
<property name="password" value="root" />
<property name="defaultAutoCommit" value="false" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="false"/>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="persistenceXmlLocation">
<value>classpath:/jpa/persistence.xml</value>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter">
<property name="databasePlatform" value="org.apache.openjpa.jdbc.sql.MySQLDictionary" />
</bean>
</property>
</bean>
<bean id="incidentBean" class="jpa.IncidentBean">
</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="jpaEntityManagerFactory" ref="entityManagerFactory" />
<property name="jpaHandleTransaction" value="false" />
<property name="jpaCloseEntityManager" value="false" />
<property name="jobExecutorActivate" value="true" />
<property name="mailServerPort" value="25" />
</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" />
<bean id="identityService" factory-bean="processEngine" factory-method="getIdentityService" />
<bean id="formService" factory-bean="processEngine"
factory-method="getFormService" />
<bean id="processInstanceAction" class="action.ProcessInstanceAction"
scope="prototype">
<property name="runtimeService" ref="runtimeService"></property>
<property name="taskService" ref="taskService"></property>
<property name="formService" ref="formService"></property>
<property name="identityService" ref="identityService"></property>
<property name="incidentBean" ref="incidentBean"></property>
<property name="repositoryService" ref="repositoryService"></property>
</bean>
</beans>
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