休眠会话关闭的问题！ [英] Hibernate Session closed problem!
本文介绍了休眠会话关闭的问题！的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
下面的函数是我的web应用程序中的按钮的actionListener，我从数据库中的表中删除旧的选定行并将新的行插入到数据库中。
public void getSelectedExemptionItems（ActionEvent ae）{
Session hibernateSession;
Session hibernate2Session;
selectedExemptions = new ArrayList< ExemptionBean>（）;
for（ExemptionBean eBean：exemBean）{//迭代ExemptionBean类的列表
if（selectedExemptionIDs.get（eBean.getExemptionID（））。booleanValue（））{
selectedExemptions.add （eBean）; //添加所选的每个ExemptionBean。
$ b //获取importane会话变量
SessionBean1 theSessionBean =（SessionBean1）FacesContext.getCurrentInstance（）。getExternalContext（）。getSessionMap（）。get（SessionBean1） ;
JAdmApplication admApplication = theSessionBean.getAdmApplication（）;
long admAppID = admApplication.getJAdmApplicationId（）;
// ArrayList< JAdmAppExemption> admAppExemption =（ArrayList< JAdmAppExemption>）theSessionBean.getAdmAppExemption（）;
JAdmAppExemption admAppExem = new JAdmAppExemption（）;
//尝试catch：通过登录用户从数据库中删除以前选择的所有免除项目。
try {
hibernateSession = HibernateUtil.getAdmSessionFactory（）。getCurrentSession（）;
Transaction t = hibernateSession.beginTransaction（）;
t.begin（）;
String sequel =从JAdmAppExemption删除WHERE createdby =？;
Query q = hibernateSession.createQuery（sequel）;
q.setParameter（0，theSessionBean.getPortalUserId（））;
} catch（Exception e）{
System.out.println（Row不能从数据库中退出!!）;
//将所有选定的豁免添加到数据库
用于（ExemptionBean e：selectedExemptions）{
admAppExem.setAdClientId（1000001）;
admAppExem.setAdOrgId（1000001）;
admAppExem.setCreated（getTimestamp（））;
admAppExem.setCreatedby（theSessionBean.getPortalUserId（））;
admAppExem.setIsactive（'Y'）;
admAppExem.setJAdmAppExemptionId（getJAdmAppExemptionIdSequence（））;
admAppExem.setJAdmApplicationId（admAppID）;
admAppExem.setJAdmExemptionId（e.getExemptionID（））;
admAppExem.setUpdated（getTimestamp（））;
admAppExem.setUpdatedby（theSessionBean.getPortalUserId（））;
hibernate2Session = HibernateUtil.getAdmSessionFactory（）。getCurrentSession（）; //会话在这里打开！
Transaction tx = hibernate2Session.beginTransaction（）;
tx.begin（）;
尝试{
hibernate2Session.beginTransaction（）;
hibernate2Session.save（admAppExem）; //是保存还是保存或更新？
hibernate2Session.getTransaction（）。commit（）;
updateJAdmAppExemptionIdSequence（）;
$ b $ catch（Throwable ex）{
if（hibernate2Session.getTransaction（）。isActive（））{
hibernate2Session.getTransaction（）。rollback（）;
}
ex.printStackTrace（）;
}
}
}
我总是收到一个异常：会议闭幕！有人可以解释一下session是如何在hibernate中自动关闭的（自动??）以及如何使用它们。
这里是异常的详细堆栈跟踪： p>
javax.faces.FacesException：org.hibernate.SessionException：Session关闭！
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute（InvokeApplicationPhase.java:90）
at com.sun.faces.lifecycle.Phase.doPhase（Phase.java:100）
at com.sun.faces.lifecycle.LifecycleImpl.execute（LifecycleImpl.java:118）
at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply（JsfLifecycleExecutor.java:18）
在com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle（ReceiveSendUpdates.java:132）
at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service（ReceiveSendUpdates.java:74）
at com.icesoft.faces.webapp.http.core.RequestVerifier.service（RequestVerifier.java:31）
at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service（ PathDispatcherServer.java:24）
at com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service（BasicAdaptingServlet.java:16）
at com.icesoft.faces.webapp.http.servlet。 PathDispatcher.service（PathD ispatcher.java:23）
at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service（SessionDispatcher.java:53）
at com.icesoft.faces.webapp.http.servlet。 SessionVerifier.service（SessionVerifier.java:26）
at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service（PathDispatcher.java:23）
at com.icesoft.faces.webapp。 http.servlet.MainServlet.service（MainServlet.java:131）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:717）
位于com.icesoft.faces.webapp.xmlhttp。 BlockingServlet.service（BlockingServlet.java:56）
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）
at org.apache.catalina.core.ApplicationFilterChain.doFilter（ ApplicationFilterChain.java:206）
at org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:233）
at org.apache.catalina.core.StandardContextValve.invoke（StandardCo
at org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:128）
at org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java： 102）
at org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:109）
at org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:286）
at org.apache.coyote.http11.Http11AprProcessor.process（Http11AprProcessor.java:857）
at org.apache.coyote.http11.Http11AprProtocol $ Http11ConnectionHandler.process（Http11AprProtocol.java:565）
在org.apache.tomcat.util.net.AprEndpoint $ Worker.run（AprEndpoint.java:1509）$ b $在java.lang.Thread.run（Thread.java:619）
导致：javax .faces.el.EvaluationException：org.hibernate.SessionException：Session关闭！
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke（MethodBindingMethodExpressionAdapter.java:102）
at javax.faces.component.UICommand.broadcast（UICommand.java:380）
at com .icesoft.faces.component.panelseries.UISeries $ RowEvent.broadcast（UISeries.java:617）
at com.icesoft.faces.component.panelseries.UISeries.broadcast（UISeries.java:285）
在com.icesoft.faces.component.paneltabset.PanelTabSet.broadcast（PanelTabSet.java:320）
在javax.faces.component.UIViewRoot.broadcastEvents（UIViewRoot.java:475）
在javax.faces .component.UIViewRoot.processApplication（UIViewRoot.java:756）
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute（InvokeApplicationPhase.java:82）
... 27 more
引起通过：org.hibernate.SessionException：会话关闭！
at org.hibernate.impl.AbstractSessionImpl.errorIfClosed（AbstractSessionImpl.java:49）
at org.hibernate.impl.SessionImpl.beginTransaction（SessionImpl.java:1319）
at sun.reflect .GeneratedMethodAccessor2480.invoke（Unknown Source）
at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）
at java.lang.reflect.Method.invoke（Method.java:597）
at org.hibernate.context.ThreadLocalSessionContext $ TransactionProtectionWrapper.invoke（ThreadLocalSessionContext.java:301）
at $ Proxy233.beginTransaction（Unknown Source）
at univportal.AdmissionApplication.Application.getSelectedExemptionItems（Application.java ：1595）
at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）
at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
at sun.reflect.DelegatingMethodAccessorImpl.invoke （DelegatingMethodAccessorImpl.ja va：25）
at java.lang.reflect.Method.invoke（Method.java:597）
at org.apache.el.parser.AstValue.invoke（AstValue.java:172）
at org.apache.el.MethodExpressionImpl.invoke（MethodExpressionImpl.java:276）
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke（MethodBindingMethodExpressionAdapter.java:88）
... 34更多
谢谢，
解决方案
长篇小说：
The function below is the actionListener for a button I have in my web application, I am deleting the old chosen rows from a table in a database and inserting the new ones to the database.
public void getSelectedExemptionItems(ActionEvent ae) {
Session hibernateSession;
Session hibernate2Session;
selectedExemptions = new ArrayList<ExemptionBean>();
for (ExemptionBean eBean : exemBean) { // iterating over the list of ExemptionBean class
if (selectedExemptionIDs.get(eBean.getExemptionID()).booleanValue()) {
selectedExemptions.add(eBean); // adding every ExemptionBean that is selected.
}
}
// getting importane session variables
SessionBean1 theSessionBean = (SessionBean1) FacesContext.getCurrentInstance().getExternalContext().getSessionMap().get("SessionBean1");
JAdmApplication admApplication = theSessionBean.getAdmApplication();
long admAppID = admApplication.getJAdmApplicationId();
// ArrayList<JAdmAppExemption> admAppExemption = (ArrayList<JAdmAppExemption>)theSessionBean.getAdmAppExemption();
JAdmAppExemption admAppExem = new JAdmAppExemption();
// try catch : delete all previously chosen exemptions from database by logged-in user.
try {
hibernateSession = HibernateUtil.getAdmSessionFactory().getCurrentSession();
Transaction t = hibernateSession.beginTransaction();
t.begin();
String sequel = "DELETE FROM JAdmAppExemption WHERE createdby = ?";
Query q = hibernateSession.createQuery(sequel);
q.setParameter(0, theSessionBean.getPortalUserId());
} catch (Exception e){
System.out.println("Row could not be deledted from database!!");
}
// adding all selected exemptions to the database
for (ExemptionBean e : selectedExemptions) {
admAppExem.setAdClientId(1000001);
admAppExem.setAdOrgId(1000001);
admAppExem.setCreated(getTimestamp());
admAppExem.setCreatedby(theSessionBean.getPortalUserId());
admAppExem.setIsactive('Y');
admAppExem.setJAdmAppExemptionId(getJAdmAppExemptionIdSequence());
admAppExem.setJAdmApplicationId(admAppID);
admAppExem.setJAdmExemptionId(e.getExemptionID());
admAppExem.setUpdated(getTimestamp());
admAppExem.setUpdatedby(theSessionBean.getPortalUserId());
hibernate2Session = HibernateUtil.getAdmSessionFactory().getCurrentSession(); // session is opened here!
Transaction tx = hibernate2Session.beginTransaction();
tx.begin();
try {
hibernate2Session.beginTransaction();
hibernate2Session.save(admAppExem); // is it save or saveOrUpdate??
hibernate2Session.getTransaction().commit();
updateJAdmAppExemptionIdSequence();
} catch (Throwable ex){
if (hibernate2Session.getTransaction().isActive()) {
hibernate2Session.getTransaction().rollback();
}
ex.printStackTrace();
}
}
}
I keep getting an exception : Session is closed !! can someone please explain how sessions are closed in hibernate (automatically??) and how to work with them..
here is the detailed stack trace of the exception:
javax.faces.FacesException: org.hibernate.SessionException: Session is closed!
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:90)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)
at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:132)
at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:74)
at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:31)
at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
at com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:16)
at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)
at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:26)
at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:131)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
at java.lang.Thread.run(Thread.java:619)
Caused by: javax.faces.el.EvaluationException: org.hibernate.SessionException: Session is closed!
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:380)
at com.icesoft.faces.component.panelseries.UISeries$RowEvent.broadcast(UISeries.java:617)
at com.icesoft.faces.component.panelseries.UISeries.broadcast(UISeries.java:285)
at com.icesoft.faces.component.paneltabset.PanelTabSet.broadcast(PanelTabSet.java:320)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
... 27 more
Caused by: org.hibernate.SessionException: Session is closed!
at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:49)
at org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1319)
at sun.reflect.GeneratedMethodAccessor2480.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:301)
at $Proxy233.beginTransaction(Unknown Source)
at univportal.AdmissionApplication.Application.getSelectedExemptionItems(Application.java:1595)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.el.parser.AstValue.invoke(AstValue.java:172)
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
... 34 more
Thanks,
解决方案
You're using lazy fetching in a session scoped managed bean while the Hibernate session is apparently configured to be request based.
Long story short: Understanding Lazy Fetching in Hibernate.
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