Connexions de réouverture JCR

Question

J'utilise JCR 1.0 et j'ai de la difficulté à réouvrir les connexions JCR après les avoir fermées.

Voici mes deux méthodes d'assistance:

private void openConnection() throws Exception { 
    loadDbProperties(); 

    repository = new TransientRepository(repositoryConfig,repositoryHome); 
    session = repository.login(new SimpleCredentials("testUserName","testPassword".toCharArray())); 

    ws = session.getWorkspace(); 

    rootNode = session.getRootNode(); 
} 

private void closeConnection() throws Exception { 
    session.save(); 
    session.logout(); 
    session = null; 
    repository = null; 
} 

J'ai deux méthodes appelées, addProperty() et getProperty(), les deux ont besoin d'une connexion au référentiel JCR. J'ai placé les méthodes openConnection() et closeConnection() au début des deux méthodes add et get mais il semble que la méthode qui exécute second ne soit pas capable de rouvrir une connexion déjà fermée.

C'est l'exception je reçois:

javax.faces.el.EvaluationException: javax.jcr.RepositoryException: this session has been closed 
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) 
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:315) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:775) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1267) 
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:550) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:380) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:619) 
Caused by: javax.jcr.RepositoryException: this session has been closed 
    at org.apache.jackrabbit.core.SessionImpl.sanityCheck(SessionImpl.java:340) 
    at org.apache.jackrabbit.core.ItemImpl.sanityCheck(ItemImpl.java:154) 
    at org.apache.jackrabbit.core.NodeImpl.addNode(NodeImpl.java:1751) 
    at pgts.trueMiner.core.dao.TenureDAOImpl.addTenure(TenureDAOImpl.java:63) 
    at pgts.trueMiner.core.biz.TenureServiceImpl.addTenure(TenureServiceImpl.java:63) 
    at pgts.trueMiner.core.ui.TenureForm.addTenure(TenureForm.java:50) 
    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 com.sun.el.parser.AstValue.invoke(AstValue.java:234) 
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297) 
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:98) 
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 
    ... 23 more 

Comment vous rouvrez la même connexion? Je ne veux pas toujours garder la connexion ouverte car un verrou empêchera d'autres applications d'utiliser le référentiel.

Answer 1

Il semble que vous essayiez d'ajouter un noeud après la fermeture de la session. Je peux reproduire l'exception en utilisant le cas de test suivant:

Repository repository = new TransientRepository(); 
Session session = repository.login(
     new SimpleCredentials("admin", "admin".toCharArray())); 
session.getWorkspace(); 
Node rootNode = session.getRootNode(); 
session.save(); 
session.logout(); 
rootNode.addNode("test"); 

Avec une version récente de Jackrabbit (je tronc Jackrabbit) vous obtiendrez la trace de la pile de l'endroit où la séance est levée:

Exception in thread "main" javax.jcr.RepositoryException: This session has been closed. See the chained exception for a trace of where the session was closed. 
    at org.apache.jackrabbit.core.session.SessionState.checkAlive(SessionState.java:121) 
    at org.apache.jackrabbit.core.session.SessionState.perform(SessionState.java:171) 
    at org.apache.jackrabbit.core.ItemImpl.perform(ItemImpl.java:91) 
    at org.apache.jackrabbit.core.NodeImpl.addNodeWithUuid(NodeImpl.java:1790) 
    at org.apache.jackrabbit.core.NodeImpl.addNode(NodeImpl.java:1742) 
    at org.apache.jackrabbit.api.Test.main(Test.java:21) 
Caused by: java.lang.Exception: Stack trace of where session-admin-4 was originally closed 
    at org.apache.jackrabbit.core.session.SessionState.close(SessionState.java:246) 
    at org.apache.jackrabbit.core.SessionImpl.logout(SessionImpl.java:888) 
    at org.apache.jackrabbit.core.XASessionImpl.logout(XASessionImpl.java:389) 
    at org.apache.jackrabbit.api.Test.main(Test.java:20)