spring+hibernate+osworkflow组合的一点改进

接上例：http://blog.csdn.net/kunshan_shenbin/archive/2008/10/23/3128756.aspx

上例中采取了在spring配置文件中定义workflow的caller的做法非常的不灵活。

考虑到这个原因，决定新建一个WebBasicWorkflow类。

代码如下：

WebWorkflow.java

1. package tw.idv.idealist.base;
3. import com.opensymphony.workflow.Workflow;
5. public interface WebWorkflow extends Workflow {
7.     public abstract void setCaller(String caller);
8. }

WebBasicWorkflow.java

1. package tw.idv.idealist.base;
3. import com.opensymphony.workflow.AbstractWorkflow;
4. import com.opensymphony.workflow.basic.BasicWorkflowContext;
6. public class WebBasicWorkflow extends AbstractWorkflow implements WebWorkflow {
8.     public WebBasicWorkflow(){
9.     }
10.     
11.     public WebBasicWorkflow(String caller){
12.         
13.         super.context = new BasicWorkflowContext(caller);
14.     }
15.     
16.     public void setCaller(String caller) {
17.         /*
18.         if(caller == null)
19.             throw new IllegalArgumentException("Argument caller is Null!");
20.         if(super.context == null)
21.             super.context = new BasicWorkflowContext(caller);
22.         else
23.             throw new IllegalArgumentException((new StringBuilder()).append("the workflow ").append(toString()).append(" has already init the Context.").toString());
24.         */
25.         super.context = new BasicWorkflowContext(caller);
26.     }
27. }

修改如下几个文件：

applicationContext.xml

1. <?xml version="1.0" encoding="UTF-8"?>
3. <beans xmlns="http://www.springframework.org/schema/beans"
4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5.     xmlns:aop="http://www.springframework.org/schema/aop"
6.     xmlns:tx="http://www.springframework.org/schema/tx"
7.     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
8.            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
9.            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">
11.     <bean id="propertyConfigurer"
12.         class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
13.         <property name="location">
14.             <value>/WEB-INF/jdbc.properties</value>
15.         </property>
16.     </bean>
18.     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
19.         <property name="driverClassName">
20.             <value>${jdbc.driverClassName}</value>
21.         </property>
22.         <property name="url">
23.             <value>${jdbc.url}</value>
24.         </property>
25.         <property name="username">
26.             <value>${jdbc.username}</value>
27.         </property>
28.         <property name="password">
29.             <value>${jdbc.password}</value>
30.         </property>
31.         <property name="maxWait">
32.             <value>${jdbc.maxWait}</value>
33.         </property>
34.         <property name="removeAbandoned">
35.             <value>${jdbc.removeAbandoned}</value>
36.         </property>
37.         <property name="removeAbandonedTimeout">
38.             <value>${jdbc.removeAbandonedTimeout}</value>
39.         </property>
40.         <property name="logAbandoned">
41.             <value>${jdbc.logAbandoned}</value>
42.         </property>
43.     </bean>
44.     
45.     <bean id="sessionFactory"
46.         class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
47.         <property name="dataSource">
48.             <ref bean="dataSource" />
49.         </property>
50.         <property name="mappingResources">
51.             <list>
52.                 <value>com/opensymphony/workflow/spi/hibernate/HibernateCurrentStep.hbm.xml</value>
53.                 <value>com/opensymphony/workflow/spi/hibernate/HibernateHistoryStep.hbm.xml</value>
54.                 <value>com/opensymphony/workflow/spi/hibernate/HibernateWorkflowEntry.hbm.xml</value>
55.             </list>
56.         </property>
57.         <property name="hibernateProperties">
58.             <props>
59.                 <prop key="hibernate.dialect">
60.                     ${hibernate.dialect}
61.                 </prop>
62.                 <prop key="hibernate.show_sql">
63.                     ${hibernate.show_sql}
64.                 </prop>
65.                 <prop key="hibernate.jdbc.batch_size">
66.                     ${hibernate.jdbc.batch_size}
67.                 </prop>
68.                 <prop key="hibernate.generate_statistics">
69.                     ${hibernate.generate_statistics}
70.                 </prop>
71.                 <prop key="hibernate.hbm2ddl.auto">
72.                     ${hibernate.hbm2ddl.auto}
73.                 </prop>
74.             </props>
75.         </property>
76.         <property name="eventListeners">
77.             <map>
78.                 <entry key="merge">
79.                     <bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener" />
80.                 </entry>
81.             </map>
82.         </property>
83.     </bean>
84.   
85.     <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
86.         <property name="sessionFactory">
87.             <ref local="sessionFactory" />
88.         </property>
89.     </bean>
91.     <bean id="workflowStore" class="com.opensymphony.workflow.spi.hibernate3.SpringHibernateWorkflowStore">
92.         <property name="sessionFactory"><ref local="sessionFactory"/></property>
93.         <property name="propertySetDelegate">
94.             <bean id="propertySetDelegate" class="com.opensymphony.workflow.util.PropertySetDelegateImpl"/>
95.         </property>
96.     </bean>
97.     
98.     <bean id="workflowTypeResolver" class="com.opensymphony.workflow.util.SpringTypeResolver"/>
99.     
100.     <bean id="workflowFactory" class="com.opensymphony.workflow.spi.hibernate.SpringWorkflowFactory" init-method="init">
101.         <property name="resource"><value>workflows.xml</value></property>
102.         <property name="reload"><value>false</value></property>
103.     </bean>
104.     
105.     <bean id="osworkflowConfiguration" class="com.opensymphony.workflow.config.SpringConfiguration">
106.         <property name="store"><ref local="workflowStore"/></property>
107.         <property name="factory"><ref local="workflowFactory"/></property>      
108.     </bean>
109.     
110.     <bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
111.         <property name="transactionManager"><ref local="transactionManager"/></property>
112.         <property name="transactionAttributes">
113.             <props>
114.                 <prop key="*">PROPAGATION_REQUIRED</prop>
115.             </props>
116.         </property>
117.     </bean>
118. <!--
119.     <bean id="workflow" class="org.springframework.aop.framework.ProxyFactoryBean">
120.         <property name="proxyInterfaces">
121.             <value>com.opensymphony.workflow.Workflow</value>
122.         </property>
123.         <property name="interceptorNames">
124.             <list>
125.                 <value>transactionInterceptor</value>
126.                 <value>workflowTarget</value>
127.             </list>
128.         </property>
129.     </bean>
131.     <bean id="workflowTarget" class="com.opensymphony.workflow.basic.BasicWorkflow">
132.         <constructor-arg><value>shenbin</value></constructor-arg>
133.         <property name="configuration"><ref local="osworkflowConfiguration"/></property>    
134.     </bean>
135. -->
136.     <bean id="workflow" class="org.springframework.aop.framework.ProxyFactoryBean">
137.         <property name="proxyInterfaces">
138.             <value>tw.idv.idealist.base.WebWorkflow</value>
139.         </property>
140.         <property name="interceptorNames">
141.             <list>
142.                 <value>transactionInterceptor</value>
143.                 <value>workflowTarget</value>
144.             </list>
145.         </property>
146.     </bean>
147.     
148.     <bean id="workflowTarget" class="tw.idv.idealist.base.WebBasicWorkflow" scope="prototype">
150.         <property name="configuration"><ref local="osworkflowConfiguration"/></property>    
151.     </bean>
152. </beans>

LeaveAction.java

1. package tw.idv.idealist.actions;
3. import java.io.IOException;
5. import javax.servlet.ServletException;
6. import javax.servlet.http.HttpServlet;
7. import javax.servlet.http.HttpServletRequest;
8. import javax.servlet.http.HttpServletResponse;
10. import org.springframework.web.context.WebApplicationContext;
11. import org.springframework.web.context.support.WebApplicationContextUtils;
13. import tw.idv.idealist.Leave;
14. import tw.idv.idealist.base.WebWorkflow;
16. public class LeaveAction extends HttpServlet {
18.     private static final long serialVersionUID = 1376955339587565809L;
20.     public void doGet(HttpServletRequest req, HttpServletResponse resp)
21.             throws ServletException, IOException {
22.         doPost(req, resp);
23.     }
25.     public void doPost(HttpServletRequest req, HttpServletResponse resp)
26.             throws ServletException, IOException {
27.         
28.         WebApplicationContext context = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
29.         WebWorkflow workflow = (WebWorkflow)context.getBean("workflow");
30.         Leave leave = new Leave();
31.         String employee = req.getParameter("employee");
32.         workflow.setCaller(employee);
33.         long workflowId = leave.send(workflow);
34.         resp.sendRedirect("allow.jsp?workflowId=" + workflowId);
35.     }
36. }

AllowAction.java

1. package tw.idv.idealist.actions;
3. import java.io.IOException;
5. import javax.servlet.ServletException;
6. import javax.servlet.http.HttpServlet;
7. import javax.servlet.http.HttpServletRequest;
8. import javax.servlet.http.HttpServletResponse;
10. import org.springframework.web.context.WebApplicationContext;
11. import org.springframework.web.context.support.WebApplicationContextUtils;
13. import tw.idv.idealist.Leave;
14. import tw.idv.idealist.base.WebWorkflow;
16. public class AllowAction extends HttpServlet {
18.     private static final long serialVersionUID = -8935624987243166064L;
20.     public void doGet(HttpServletRequest req, HttpServletResponse resp)
21.             throws ServletException, IOException {
22.         doPost(req, resp);
23.     }
25.     public void doPost(HttpServletRequest req, HttpServletResponse resp)
26.             throws ServletException, IOException {
27.         
28.         WebApplicationContext context = WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
29.         WebWorkflow workflow = (WebWorkflow)context.getBean("workflow");
30.         String workflowId = req.getParameter("workflowId");
31.         String actionId = req.getParameter("actionId");
32.         Leave leave = new Leave();
33.         workflow.setCaller("manager");
34.         leave.allow(workflow, Long.parseLong(workflowId), Integer.parseInt(actionId));
35.         
36.         resp.sendRedirect("completed.jsp");
37.     }
38. }

本来的做法其实来源于下面的文中：

http://read.newbooks.com.cn/info/197933.html

他里面包换的实现所在网址：

http://groups.google.com/group/ahxu/browse_thread/thread/2bf91654d871d7e4/5adfec0e7e83c351?#5adfec0e7e83c351

http://groups.google.com/group/ahxu/msg/c12d0f4a8950d22d