Pourquoi tomcat ne voit pas la mise à jour dans la base de données?

Question

Je suis actuellement en netbeans Je développe une application web avec Java. J'utilise JPA2.0 avec la base de données H2.

Le problème est que lorsque je modifie les données dans la base de données et que j'ai rechargé la page dans le navigateur => aucune modification n'est définie. Seulement si j'exécutez à nouveau une page jsp en netbeans, ou je redémarre tomcat:

web.xml:

<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
    <servlet> 
     <servlet-name>ajoutAutomobile</servlet-name> 
     <servlet-class>controlleurs.ajoutAutomobile</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutConducteur</servlet-name> 
     <servlet-class>controlleurs.ajoutConducteur</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutMission</servlet-name> 
     <servlet-class>controlleurs.ajoutMission</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutUtilisateur</servlet-name> 
     <servlet-class>controlleurs.ajoutUtilisateur</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectCinConducteur</servlet-name> 
     <servlet-class>controlleurs.selectCinConducteur</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectIdAuto</servlet-name> 
     <servlet-class>controlleurs.selectIdAuto</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectIdAutomobile</servlet-name> 
     <servlet-class>controlleurs.selectIdAutomobile</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutVignette</servlet-name> 
     <servlet-class>controlleurs.ajoutVignette</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectImei</servlet-name> 
     <servlet-class>controlleurs.selectImei</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutAssurance</servlet-name> 
     <servlet-class>controlleurs.ajoutAssurance</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutVisite</servlet-name> 
     <servlet-class>controlleurs.ajoutVisite</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutIntervention</servlet-name> 
     <servlet-class>controlleurs.ajoutIntervention</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectAutoLibre</servlet-name> 
     <servlet-class>controlleurs.selectAutoLibre</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectConducteurLibre</servlet-name> 
     <servlet-class>controlleurs.selectConducteurLibre</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>afficheInfoGeo</servlet-name> 
     <servlet-class>controlleurs.afficheInfoGeo</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>ajoutAffectation</servlet-name> 
     <servlet-class>controlleurs.ajoutAffectation</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>afficheListConducteur</servlet-name> 
     <servlet-class>controlleurs.afficheListConducteur</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>afficheInfoGeoRestreinte</servlet-name> 
     <servlet-class>controlleurs.afficheInfoGeoRestreinte</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectDate</servlet-name> 
     <servlet-class>controlleurs.selectDate</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectCoordsRestreinte</servlet-name> 
     <servlet-class>controlleurs.selectCoordsRestreinte</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectAssuranceExpir</servlet-name> 
     <servlet-class>controlleurs.selectAssuranceExpir</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectVignetteExpir</servlet-name> 
     <servlet-class>controlleurs.selectVignetteExpir</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectVisiteExpir</servlet-name> 
     <servlet-class>controlleurs.selectVisiteExpir</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectAssurance</servlet-name> 
     <servlet-class>controlleurs.selectAssurance</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectVignette</servlet-name> 
     <servlet-class>controlleurs.selectVignette</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>selectVisite</servlet-name> 
     <servlet-class>controlleurs.selectVisite</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>afficheListAutomobile</servlet-name> 
     <servlet-class>controlleurs.afficheListAutomobile</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>historiqueAffectationConducteur</servlet-name> 
     <servlet-class>controlleurs.historiqueAffectationConducteur</servlet-class> 
    </servlet> 
    <servlet> 
     <servlet-name>historiqueAffectationAutomobile</servlet-name> 
     <servlet-class>controlleurs.historiqueAffectationAutomobile</servlet-class> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>ajoutAutomobile</servlet-name> 
     <url-pattern>/ajoutAutomobile</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutConducteur</servlet-name> 
     <url-pattern>/ajoutConducteur</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutMission</servlet-name> 
     <url-pattern>/ajoutMission</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutUtilisateur</servlet-name> 
     <url-pattern>/ajoutUtilisateur</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectCinConducteur</servlet-name> 
     <url-pattern>/selectCinConducteur</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectIdAuto</servlet-name> 
     <url-pattern>/selectIdAuto</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectIdAutomobile</servlet-name> 
     <url-pattern>/selectIdAutomobile</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutVignette</servlet-name> 
     <url-pattern>/ajoutVignette</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectImei</servlet-name> 
     <url-pattern>/selectImei</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutAssurance</servlet-name> 
     <url-pattern>/ajoutAssurance</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutVisite</servlet-name> 
     <url-pattern>/ajoutVisite</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutIntervention</servlet-name> 
     <url-pattern>/ajoutIntervention</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectAutoLibre</servlet-name> 
     <url-pattern>/selectAutoLibre</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectConducteurLibre</servlet-name> 
     <url-pattern>/selectConducteurLibre</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>afficheInfoGeo</servlet-name> 
     <url-pattern>/afficheInfoGeo</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>ajoutAffectation</servlet-name> 
     <url-pattern>/ajoutAffectation</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>afficheListConducteur</servlet-name> 
     <url-pattern>/afficheListConducteur</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>afficheInfoGeoRestreinte</servlet-name> 
     <url-pattern>/afficheInfoGeoRestreinte</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectDate</servlet-name> 
     <url-pattern>/selectDate</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectCoordsRestreinte</servlet-name> 
     <url-pattern>/selectCoordsRestreinte</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectAssuranceExpir</servlet-name> 
     <url-pattern>/selectAssuranceExpir</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectVignetteExpir</servlet-name> 
     <url-pattern>/selectVignetteExpir</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectVisiteExpir</servlet-name> 
     <url-pattern>/selectVisiteExpir</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectAssurance</servlet-name> 
     <url-pattern>/selectAssurance</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectVignette</servlet-name> 
     <url-pattern>/selectVignette</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>selectVisite</servlet-name> 
     <url-pattern>/selectVisite</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>afficheListAutomobile</servlet-name> 
     <url-pattern>/afficheListAutomobile</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>historiqueAffectationConducteur</servlet-name> 
     <url-pattern>/historiqueAffectationConducteur</url-pattern> 
    </servlet-mapping> 
    <servlet-mapping> 
     <servlet-name>historiqueAffectationAutomobile</servlet-name> 
     <url-pattern>/historiqueAffectationAutomobile</url-pattern> 
    </servlet-mapping> 
    <session-config> 
     <session-timeout> 
      30 
     </session-timeout> 
    </session-config> 
    <welcome-file-list> 
     <welcome-file>index.jsp</welcome-file> 
    </welcome-file-list> 
</web-app> 

server.xml:

<?xml version='1.0' encoding='utf-8'?> 
<!-- 
    Licensed to the Apache Software Foundation (ASF) under one or more 
    contributor license agreements. See the NOTICE file distributed with 
    this work for additional information regarding copyright ownership. 
    The ASF licenses this file to You under the Apache License, Version 2.0 
    (the "License"); you may not use this file except in compliance with 
    the License. You may obtain a copy of the License at 

     http://www.apache.org/licenses/LICENSE-2.0 

    Unless required by applicable law or agreed to in writing, software 
    distributed under the License is distributed on an "AS IS" BASIS, 
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
    See the License for the specific language governing permissions and 
    limitations under the License. 
--> 
<!-- Note: A "Server" is not itself a "Container", so you may not 
    define subcomponents such as "Valves" at this level. 
    Documentation at /docs/config/server.html 
--> 
<Server port="8005" shutdown="SHUTDOWN"> 

    <!--APR library loader. Documentation at /docs/apr.html --> 
    <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /> 
    <!--Initialize Jasper prior to webapps are loaded. Documentation at /docs/jasper-howto.html --> 
    <Listener className="org.apache.catalina.core.JasperListener" /> 
    <!-- Prevent memory leaks due to use of particular java/javax APIs--> 
    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /> 
    <!-- JMX Support for the Tomcat server. Documentation at /docs/non-existent.html --> 
    <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" /> 
    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /> 

    <!-- Global JNDI resources 
     Documentation at /docs/jndi-resources-howto.html 
    --> 
    <GlobalNamingResources> 
    <!-- Editable user database that can also be used by 
     UserDatabaseRealm to authenticate users 
    --> 
    <Resource name="UserDatabase" auth="Container" 
       type="org.apache.catalina.UserDatabase" 
       description="User database that can be updated and saved" 
       factory="org.apache.catalina.users.MemoryUserDatabaseFactory" 
       pathname="conf/tomcat-users.xml" /> 
    </GlobalNamingResources> 

    <!-- A "Service" is a collection of one or more "Connectors" that share 
     a single "Container" Note: A "Service" is not itself a "Container", 
     so you may not define subcomponents such as "Valves" at this level. 
     Documentation at /docs/config/service.html 
    --> 
    <Service name="Catalina"> 

    <!--The connectors can use a shared executor, you can define one or more named thread pools--> 
    <!-- 
    <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" 
     maxThreads="150" minSpareThreads="4"/> 
    --> 


    <!-- A "Connector" represents an endpoint by which requests are received 
     and responses are returned. Documentation at : 
     Java HTTP Connector: /docs/config/http.html (blocking & non-blocking) 
     Java AJP Connector: /docs/config/ajp.html 
     APR (HTTP/AJP) Connector: /docs/apr.html 
     Define a non-SSL HTTP/1.1 Connector on port 8080 
    --> 
    <Connector port="8080" protocol="HTTP/1.1" 
       connectionTimeout="20000" 
       redirectPort="8443" /> 
    <!-- A "Connector" using the shared thread pool--> 
    <!-- 
    <Connector executor="tomcatThreadPool" 
       port="8080" protocol="HTTP/1.1" 
       connectionTimeout="20000" 
       redirectPort="8443" /> 
    -->   
    <!-- Define a SSL HTTP/1.1 Connector on port 8443 
     This connector uses the JSSE configuration, when using APR, the 
     connector should be using the OpenSSL style configuration 
     described in the APR documentation --> 
    <!-- 
    <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true" 
       maxThreads="150" scheme="https" secure="true" 
       clientAuth="false" sslProtocol="TLS" /> 
    --> 

    <!-- Define an AJP 1.3 Connector on port 8009 --> 
    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> 


    <!-- An Engine represents the entry point (within Catalina) that processes 
     every request. The Engine implementation for Tomcat stand alone 
     analyzes the HTTP headers included with the request, and passes them 
     on to the appropriate Host (virtual host). 
     Documentation at /docs/config/engine.html --> 

    <!-- You should set jvmRoute to support load-balancing via AJP ie : 
    <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">   
    --> 
    <Engine name="Catalina" defaultHost="localhost"> 

     <!--For clustering, please take a look at documentation at: 
      /docs/cluster-howto.html (simple how to) 
      /docs/config/cluster.html (reference documentation) --> 
     <!-- 
     <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> 
     -->   

     <!-- The request dumper valve dumps useful debugging information about 
      the request and response data received and sent by Tomcat. 
      Documentation at: /docs/config/valve.html --> 
     <!-- 
     <Valve className="org.apache.catalina.valves.RequestDumperValve"/> 
     --> 

     <!-- This Realm uses the UserDatabase configured in the global JNDI 
      resources under the key "UserDatabase". Any edits 
      that are performed against this UserDatabase are immediately 
      available for use by the Realm. --> 
     <Realm className="org.apache.catalina.realm.UserDatabaseRealm" 
      resourceName="UserDatabase"/> 

     <!-- Define the default virtual host 
      Note: XML Schema validation will not work with Xerces 2.2. 
     --> 
     <Host name="localhost" appBase="webapps" 
      unpackWARs="true" autoDeploy="true" 
      xmlValidation="false" xmlNamespaceAware="false"> 

     <!-- SingleSignOn valve, share authentication between web applications 
      Documentation at: /docs/config/valve.html --> 
     <!-- 
     <Valve className="org.apache.catalina.authenticator.SingleSignOn" /> 
     --> 

     <!-- Access log processes all example. 
      Documentation at: /docs/config/valve.html --> 
     <!-- 
     <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" 
       prefix="localhost_access_log." suffix=".txt" pattern="common" resolveHosts="false"/> 
     --> 

     </Host> 
    </Engine> 
    </Service> 
</Server> 

Comment résoudre ce problème s'il vous plaît?

EDIT: Je l'ai essayé de supprimer le cache, ouvrez également la page dans un autre navigateur => même résultat ..

EDIT2: persistence.xml:

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> 
    <persistence-unit name="webPU" transaction-type="RESOURCE_LOCAL"> 
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> 
    <class>entities.Automobile</class> 
    <class>entities.Intervention</class> 
    <class>entities.Assurance</class> 
    <class>entities.Coordonnees</class> 
    <class>entities.Mission</class> 
    <class>entities.Affectation</class> 
    <class>entities.Conducteur</class> 
    <class>entities.Gps</class> 
    <class>entities.Vignette</class> 
    <class>entities.Utilisateur</class> 
    <class>entities.VisiteTechnique</class> 
    <exclude-unlisted-classes>false</exclude-unlisted-classes> 
    <properties> 
     <property name="javax.persistence.jdbc.url" value="jdbc:h2:tcp://localhost/~/ApiGps"/> 
     <property name="javax.persistence.jdbc.password" value=""/> 
     <property name="javax.persistence.jdbc.driver" value="org.h2.Driver"/> 
     <property name="javax.persistence.jdbc.user" value="sa"/> 
    </properties> 
    </persistence-unit> 
</persistence> 

Mon servlet :

response.setContentType("application/json"); 

     PrintWriter out = response.getWriter(); 
     EntityManagerFactory emf=Persistence.createEntityManagerFactory("webPU"); 


     Timestamp nd=new Timestamp(System.currentTimeMillis());//now 
     nd.setMinutes(nd.getMinutes()-20); 
     EntityManager em=emf.createEntityManager(); 
     String req="select a from Automobile a where a.gpsImei.imei in (SELECT c.gpsImei.imei FROM Coordonnees c WHERE c.date < :nd)"; 
     Query resultat=em.createQuery(req); 
     resultat.setParameter("nd", nd); 
     java.util.List<Automobile> la= resultat.getResultList(); 
     Gson gson=new Gson(); 
     String json =gson.toJson(La);//convert the List to json 

     try { 
     out.println(json);//return respons to ajax 
     } finally {    
     out.close(); 
     } 

Answer 1

Depuis que vous utilisez transaction-type="RESOURCE_LOCAL"

Vous souhaitez toujours utiliser un seul EntityManager. Avoir une classe parente qui gère la même instance d'EntityManager dans votre application.

Il est presque jamais une bonne idée d'avoir plus d'une instance d'un EntityManager utilisé (ne crée pas une seconde, sauf si vous avez détruit le premier)

Je pense le problème est en créant un nouveau EM ici

EntityManager em=emf.createEntityManager(); 

Personnellement, je préfère utiliser le type de transaction, transaction type = « transaction », de ne pas se soucier du gestionnaire d'entités https://stackoverflow.com/a/1963012/643500

Vous pouvez en lire plus ici http://openejb.apache.org/jpa-concepts.html

Lorsque vous enregistrez les données utilisez-vous saveOrUpdate ou une fusion?

Cela peut ne pas être la bonne réponse, mais j'espère que cela aide.