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发表时间：2008-03-04
Spring, Springmodules, JBPM持久化集成理解系列二 【本系列如需转载，请注明作者及出处】
本系列文章假设阅者具备以下知识：
第二部分，Session的关闭： 到了这里，我们就到了验证的最后一部分了，JbpmContext的关闭了。 public void close() {
log.debug("closing JbpmContext");
try {
if (services!=null) {
try {
autoSave();
} finally {
services.close();
}
}
} finally {
if (jbpmConfiguration!=null) {
jbpmConfiguration.jbpmContextClosed(this);
}
}
}
也就是说，JbpmContext关闭的时候会产生自动保存，最后关闭services,现在摘取DbPersistenceService的close里面我们关心的逻辑： 【位置DbPersistenceService】 if (mustSessionBeClosed) {
try {
if(session.isOpen()) {
log.debug("closing hibernate session");
session.close();
} else {
log.warn("hibernate session was already closed");
}
} catch (Exception e) {
throw new JbpmPersistenceException("couldn't close hibernate session", e);
}
}
if (mustConnectionBeClosed) {
try {
if ( (connection!=null)
&& (! connection.isClosed())
) {
log.debug("closing jdbc connection");
connection.close();
} else {
log.warn("jdbc connection was already closed");
}
} catch (Exception e) {
throw new JbpmPersistenceException("couldn't close jdbc connection", e);
}
}
package com.cabernet;
import java.util.List;
import junit.framework.Assert;
import org.jbpm.taskmgmt.exe.TaskInstance;
import org.springmodules.workflow.jbpm31.JbpmTemplate;
public class TestSetUp extends BaseTestCase
{
protected JbpmTemplate jbpmTemplate;
public void test()
{
Assert.assertNotNull(this.jbpmTemplate);
boolean isDebugEnabled = log.isDebugEnabled();
if (isDebugEnabled)
{
log.debug("findTaskInstances");
}
List<TaskInstance> tasks = this.jbpmTemplate.findTaskInstances("bert");
if (tasks != null)
{
if (isDebugEnabled)
{
log.debug("Tasks found, Swimlane: [" + tasks.get(0).getTask()
.getSwimlane().getName() + "].");
}
return;
}
if (isDebugEnabled)
{
log.debug("No tasks found.");
}
}
public JbpmTemplate getJbpmTemplate()
{
return jbpmTemplate;
}
public void setJbpmTemplate(JbpmTemplate jbpmTemplate)
{
this.jbpmTemplate = jbpmTemplate;
}
}
上述Junit 类继承的父类BaseTestCase是AbstractDependencyInjectionSpringContextTests的子类， 启用了与OpenSessionInView一样的数据LazyLoading和JDBC Connection延迟关闭策略。
附件是测试这个这个流程所发生的Log，首先是SessionFactoryUtils打开了Hibernate Session，最后是SessionFactoryUtils关闭了Hibernate Session，符合Jbpm声称的Context哲学。 2008-03-04 00:14:12 DEBUG (SessionFactoryUtils.java:690) - Initializing deferred close of Hibernate Sessions 2008-03-04 00:14:12 DEBUG (SessionFactoryUtils.java:316) - Opening Hibernate Session 2008-03-04 00:14:12 DEBUG (TestSetUp.java:22) - findTaskInstances 2008-03-04 00:14:12 DEBUG (JbpmContextInfo.java:142) - creating jbpm context with service factories '[message, scheduler, logging, persistence, authentication]' 2008-03-04 00:14:12 DEBUG (JbpmContext.java:124) - creating JbpmContext 2008-03-04 00:14:12 DEBUG (HibernateTemplate.java:364) - Found thread-bound Session for HibernateTemplate 2008-03-04 00:14:12 DEBUG (DbPersistenceServiceFactory.java:55) - creating persistence service 2008-03-04 00:14:12 DEBUG (DbPersistenceService.java:303) - injecting a session disables transaction Hibernate: select taskinstan0_.ID_ as ID1_27_, taskinstan0_.NAME_ as NAME3_27_, taskinstan0_.DESCRIPTION_ as DESCRIPT4_27_, taskinstan0_.ACTORID_ as ACTORID5_27_, taskinstan0_.CREATE_ as CREATE6_27_, taskinstan0_.START_ as START7_27_, taskinstan0_.END_ as END8_27_, taskinstan0_.DUEDATE_ as DUEDATE9_27_, taskinstan0_.PRIORITY_ as PRIORITY10_27_, taskinstan0_.ISCANCELLED_ as ISCANCE11_27_, taskinstan0_.ISSUSPENDED_ as ISSUSPE12_27_, taskinstan0_.ISOPEN_ as ISOPEN13_27_, taskinstan0_.ISSIGNALLING_ as ISSIGNA14_27_, taskinstan0_.ISBLOCKING_ as ISBLOCKING15_27_, taskinstan0_.TASK_ as TASK16_27_, taskinstan0_.TOKEN_ as TOKEN17_27_, taskinstan0_.SWIMLANINSTANCE_ as SWIMLAN18_27_, taskinstan0_.TASKMGMTINSTANCE_ as TASKMGM19_27_ from JBPM_TASKINSTANCE taskinstan0_ where taskinstan0_.ACTORID_=? and taskinstan0_.ISSUSPENDED_<>1 and taskinstan0_.ISOPEN_=1 2008-03-04 00:14:13 DEBUG (HibernateTemplate.java:388) - Not closing pre-bound Hibernate Session after HibernateTemplate 2008-03-04 00:14:13 DEBUG (JbpmContext.java:133) - closing JbpmContext 2008-03-04 00:14:13 DEBUG (Services.java:210) - closing service 'persistence': org.jbpm.persistence.db.DbPersistenceService@1ce663c Hibernate: select task0_.ID_ as ID1_14_0_, task0_.NAME_ as NAME2_14_0_, task0_.PROCESSDEFINITION_ as PROCESSD3_14_0_, task0_.DESCRIPTION_ as DESCRIPT4_14_0_, task0_.ISBLOCKING_ as ISBLOCKING5_14_0_, task0_.ISSIGNALLING_ as ISSIGNAL6_14_0_, task0_.DUEDATE_ as DUEDATE7_14_0_, task0_.ACTORIDEXPRESSION_ as ACTORIDE8_14_0_, task0_.POOLEDACTORSEXPRESSION_ as POOLEDAC9_14_0_, task0_.TASKMGMTDEFINITION_ as TASKMGM10_14_0_, task0_.TASKNODE_ as TASKNODE11_14_0_, task0_.STARTSTATE_ as STARTSTATE12_14_0_, task0_.ASSIGNMENTDELEGATION_ as ASSIGNM13_14_0_, task0_.SWIMLANE_ as SWIMLANE14_14_0_, task0_.TASKCONTROLLER_ as TASKCON15_14_0_ from JBPM_TASK task0_ where task0_.ID_=? Hibernate: select swimlane0_.ID_ as ID1_13_0_, swimlane0_.NAME_ as NAME2_13_0_, swimlane0_.ACTORIDEXPRESSION_ as ACTORIDE3_13_0_, swimlane0_.POOLEDACTORSEXPRESSION_ as POOLEDAC4_13_0_, swimlane0_.ASSIGNMENTDELEGATION_ as ASSIGNME5_13_0_, swimlane0_.TASKMGMTDEFINITION_ as TASKMGMT6_13_0_ from JBPM_SWIMLANE swimlane0_ where swimlane0_.ID_=? 2008-03-04 00:14:13 DEBUG (TestSetUp.java:31) - Tasks found, Swimlane: [buyer]. 2008-03-04 00:14:13 DEBUG (SessionFactoryUtils.java:714) - Processing deferred close of Hibernate Sessions
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