Spring2.5整合Activiti 5.11 解决MalformedParameterizedTypeException问题

最新推荐文章于 2024-09-05 23:00:00 发布

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本文介绍如何在Spring2.5环境中整合Activiti5.11，解决因Spring版本导致的配置问题，并提供了一种适用于旧版Spring的配置方案。

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关于Spring3.X与Activiti5.11整合配置如下：

<!-- Activiti begin -->
	<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
<!-- 		<property name="jdbcUrl" value="${jdbc.url}" /> -->
<!-- 		<property name="jdbcDriver" value="${jdbc.driver}" /> -->
<!-- 		<property name="jdbcUsername" value="${jdbc.username}" /> -->
<!-- 		<property name="jdbcPassword" value="${jdbc.password}" /> -->
 		<property name="dataSource" ref="dataSource" />
		<property name="transactionManager" ref="transactionManager" />
		<property name="databaseSchemaUpdate" value="true" />
		<!-- 测试情况下关闭多线程 -->
		<property name="jobExecutorActivate" value="false" />
		<property name="history" value="full" />
<!-- 		<property name="mailServerHost" value="mail.my-corp.com" /> -->
<!-- 		<property name="mailServerPort" value="5025" /> -->
		
		<!-- 自动部署 -->
		<property name="deploymentResources">
			<list>
				<value>classpath*:/diagrams/*</value>
			</list>
		</property>
	</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="formService" factory-bean="processEngine" factory-method="getFormService" />
	<bean id="identityService" factory-bean="processEngine" factory-method="getIdentityService" />
	<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" />
	<!-- Activiti end -->

这种配置采用activiti-spring插件实现，在Spring 3.X中没有问题。

但在Spring2.5使用如下配置，则会引发 MalformedParameterizedTypeException。

由于Spring2.5的FactoryBean(即上述的ProcessEngineFactoryBean)不支持泛型，Spring尝试获取该泛型类型时会产生该异常。

解决方案：

<!-- Activiti begin -->
	<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
 		<property name="dataSource" ref="dataSource" />
		<property name="transactionManager" ref="transactionManager" />
		<property name="databaseSchemaUpdate" value="false" />
		<property name="jobExecutorActivate" value="false" />
		<property name="history" value="full" />
		<property name="deploymentResources">
			<list>
				<value>classpath*:/diagrams/*</value>
			</list>
		</property>
		<property name="transactionsExternallyManaged" value="true" />
		<!-- Spring表达式支持 -->
		<property name="expressionManager">
			<bean class="com.hxchn.aero.util.SpringExpressionManagerFactoryBean">
					<property name="processEngineConfiguration" ref="processEngineConfiguration"></property>
			</bean>
		</property>
	</bean>
	
	<bean id="processEngine" factory-bean="processEngineConfiguration" factory-method="buildProcessEngine">
	</bean>

	<bean id="repositoryService" factory-bean="processEngineConfiguration" factory-method="getRepositoryService" />
	<bean id="runtimeService" factory-bean="processEngineConfiguration" factory-method="getRuntimeService" />
	<bean id="formService" factory-bean="processEngineConfiguration" factory-method="getFormService" />
	<bean id="identityService" factory-bean="processEngineConfiguration" factory-method="getIdentityService" />
	<bean id="taskService" factory-bean="processEngineConfiguration" factory-method="getTaskService" />
	<bean id="historyService" factory-bean="processEngineConfiguration" factory-method="getHistoryService" />
	<bean id="managementService" factory-bean="processEngineConfiguration" factory-method="getManagementService" />
	<!-- Activiti end -->

com.hxchn.aero.util.SpringExpressionManagerFactoryBeancom.hxchn.aero.util.SpringExpressionManagerFactoryBean代码如下:

package com.hxchn.aero.util;

import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.activiti.spring.SpringExpressionManager;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class SpringExpressionManagerFactoryBean implements FactoryBean, ApplicationContextAware {
	
	ApplicationContext applicationContext;
	ProcessEngineConfiguration processEngineConfiguration;
	
	
	@Override
	public Object getObject() throws Exception {
		return new SpringExpressionManager(applicationContext, ((ProcessEngineConfigurationImpl) processEngineConfiguration).getBeans());
	}

	@Override
	public Class getObjectType() {
		return SpringExpressionManager.class;
	}

	@Override
	public boolean isSingleton() {
		return true;
	}

	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		this.applicationContext = applicationContext;
	}

	public void setProcessEngineConfiguration(
			ProcessEngineConfiguration processEngineConfiguration) {
		this.processEngineConfiguration = processEngineConfiguration;
	}
	
}

以上避免使用ProcessEngineFactoryBean，而通过使用processEngineConfiguration的工厂方法buildProcessEngine的方式获取processEngine流程引擎。

对于早期基于Spring2.5的项目引入Activiti可以采用该方式；我现在项目也是基于Spring2.5.6开发的，也是通过该配置方式引入Activiti5.11。

对于新项目建议使用Spring3.X以上，可以直接使用activti-spring插件，网上也有一些例子，配置学习起来更为方便。