5
Ciao e grazie per la visione ;-)Hibernate ClassCastException in GWT ospitato modalità solo
Il nostro problema/errore è:
javax.persistence.PersistenceException: [PersistenceUnit: PUname] Unable to build EntityManagerFactory
...
Caused by: org.hibernate.HibernateException: Could not instantiate dialect class
...
Caused by: java.lang.ClassCastException: org.hibernate.dialect.MySQLDialect cannot be cast to org.hibernate.dialect.Dialect
...
(vedi completa analisi dello stack in basso)
si verifica in un'applicazione Web basata su GWT che utilizza le seguenti tecnologie:
- Maven
- Hibernate EntityManager/JPA
- Guice
- GWT
- GWT-P
- GWT Maven plug
- ...
Il fatto sottolineare è che funziona in Tomcat. Solo in modalità di sviluppo in modalità hosted (con Jetty), utilizzando GWT Maven Plugin (con obiettivo gwt: run), otteniamo ClassCastException. Stavamo giocando con le dipendenze di Hibernate senza fortuna (aggiungendo hibernate-validator e/o hibernate-jpa-2.0-api). ClassCastException viene lanciato all'avvio di JPA prima che venga effettivamente utilizzato qualsiasi servizio. BTW: JPA è l'impostazione utilizzando Guice:
install(new JpaPersistModule("PUname"));
filter("/*").through(PersistFilter.class);
Può valere la pena di ricordare che disattivando l'impostazione dialetto (in persistence.xml) crea un altro ClassCastException anche JPA all'avvio:
javax.persistence.PersistenceException: [PersistenceUnit: dsmgmt] Unable to build EntityManagerFactory
...
Caused by: org.hibernate.HibernateException: Unable to instantiate specified TransactionFactory class [org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory]
...
Caused by: java.lang.ClassCastException: org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory cannot be cast to org.hibernate.engine.transaction.spi.TransactionFactory
...
Perché lo fa rompere in Jetty? Cosa potrebbe causarlo o come può essere risolto?
File: META-INF/persistence.xml
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.0" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="PUname" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>our.test.class</class>
<properties>
<property name="hibernate.connection.username" value="user"/>
<property name="hibernate.connection.password" value="pass"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.url" value="jdbc:mysql://machine:3306/db"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
nostri JAR nella webapp:
445.288 antlr-2.7.7.jar
150.774 antlr-runtime-3.1.3.jar
4.467 aopalliance-1.0.jar
57.963 classmate-0.5.4.jar
575.389 commons-collections-3.2.1.jar
52.543 commons-exec-1.1.jar
59.590 commons-fileupload-1.2.2.jar
163.151 commons-io-2.1.jar
284.220 commons-lang-2.6.jar
313.898 dom4j-1.6.1.jar
131.929 dsmgmt-shared-0.1-SNAPSHOT.jar
1.006.424 ehcache-core-2.4.3.jar
710.492 guice-3.0.jar
36.998 guice-assistedinject-3.0.jar
27.633 guice-persist-3.0.jar
65.012 guice-servlet-3.0.jar
5.004.997 gwt-servlet-2.3.0.jar
28.339 gwtp-dispatch-server-0.6.jar
17.184 gwtp-dispatch-server-guice-0.6.jar
30.402 gwtp-dispatch-shared-0.6.jar
81.426 hibernate-commons-annotations-4.0.0.Final.jar
4.347.499 hibernate-core-4.0.0.CR6.jar
127.259 hibernate-ehcache-4.0.0.CR6.jar
471.832 hibernate-entitymanager-4.0.0.CR6.jar
102.661 hibernate-jpa-2.0-api-1.0.1.Final.jar
366.592 hibernate-validator-4.2.0.Final.jar
70.928 jandex-1.0.3.Final.jar
644.148 javassist-3.12.1.GA.jar
2.497 javax.inject-1.jar
60.542 jboss-logging-3.1.0.CR1.jar
11.209 jboss-transaction-api_1.1_spec-1.0.0.Final.jar
859.016 jna-3.2.3.jar
213.781 jsch-0.1.44-1.jar
281.579 jsoup-1.6.1.jar
481.535 log4j-1.2.16.jar
789.885 mysql-connector-java-5.1.18.jar
1.351.561 org.eclipse.jgit-1.0.0.201106090707-r.jar
601.287 pd4ml-3.80b1.jar
149.846 pd4ml-ss-css-3.80b1.jar
25.962 slf4j-api-1.6.4.jar
9.748 slf4j-log4j12-1.6.4.jar
743.673 sqljet-1.0.4.jar
172.023 stringtemplate-3.2.jar
1.889.196 svnkit-1.3.5.jar
251.371 trilead-ssh2-build213-svnkit-1.3-patch.jar
47.433 validation-api-1.0.0.GA.jar
109.318 xml-apis-1.0.b2.jar
Lo stacktrace completa:
javax.persistence.PersistenceException: [PersistenceUnit: PUname] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:916)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
at com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
at com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
at com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: org.hibernate.HibernateException: Could not instantiate dialect class
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:82)
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:142)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:81)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:160)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:133)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2259)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2255)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1724)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:76)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:907)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
at com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
at com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
at com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: java.lang.ClassCastException: org.hibernate.dialect.MySQLDialect cannot be cast to org.hibernate.dialect.Dialect
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.constructDialect(DialectFactoryImpl.java:73)
at org.hibernate.service.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:64)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:142)
at org.hibernate.service.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:81)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:160)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:133)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:71)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2259)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2255)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1724)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:76)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:907)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:887)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
at com.google.inject.persist.PersistFilter.init(PersistFilter.java:77)
at com.google.inject.servlet.FilterDefinition.init(FilterDefinition.java:114)
at com.google.inject.servlet.ManagedFilterPipeline.initPipeline(ManagedFilterPipeline.java:98)
at com.google.inject.servlet.GuiceFilter.init(GuiceFilter.java:172)
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:593)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:222)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Con i migliori saluti, Alexander