[rules-users] Persistence.createEntityManagerFactory NullPointerException
liang
zhuyx808 at gmail.com
Sun Sep 5 22:40:42 EDT 2010
hi gustavo,
has a big different between tomcat5.5 and tomcat6? According to your guide,i
cannot bind JNDI,maybe i must set resource in tomcat conf/context.xml, i am
confusing……can you send a example to me?THS
在 2010年9月3日 下午11:49，Gustavo Tenrreiro <gustavo at tenrreiro.com>写道：
> If it helps at all; I spent almost a full week trying to get JPA to
> work with Tomcat 5.5 + Hibernate + Bitronix and this is what I found.
>
> The instructions for Bitronix in
> http://docs.codehaus.org/display/BTM/Tomcat13 did not help me much.
> The datasource that gets created via the resource.properties could
> never be found.
>
> - So to get it to work, do deploy the Bitronix jar files into your
> server / context
>
> - In the Tomcat conf/context.xml I do have "<Transaction
> factory="bitronix.tm.BitronixUserTransactionObjectFactory" />" but I
> am not sure if it is required ( haven't tested removing it ).
>
> - In the web.xml I do have:
>
> <resource-env-ref>
>
> <resource-env-ref-name>java:comp/env/jdbc/processInstanceDS</resource-env-ref-name>
> <resource-env-ref-type>javax.sql.DataSource</resource-env-ref-type>
> </resource-env-ref>
>
> where jdbc/processInstanceDS is your jdbc/mysql
>
> - In the Hibernate persistence.xml I do have:
>
> <property name="hibernate.transaction.manager_lookup_class"
> value="org.hibernate.transaction.BTMTransactionManagerLookup" />
> <property name="hibernate.jndi.class"
> value="bitronix.tm.jndi.BitronixInitialContextFactory" />
>
> although I don't think it is using the jndi.class specified there, so
> the second line might be redundant.
>
> Then in my code I create the datasource by hand ( in a
> ServletContextListener ):
>
> PoolingDataSource ds = new PoolingDataSource();
> ds.setUniqueName( "jdbc/processInstanceDS" );
> ds.setClassName(
> "bitronix.tm.resource.jdbc.lrc.LrcXADataSource");
> ds.setMaxPoolSize( 3 );
> ds.setAllowLocalTransactions( true );
>
> ds.getDriverProperties().put("driverClassName","com.microsoft.sqlserver.jdbc.SQLServerDriver");
> ds.getDriverProperties().put( "user", "xxxxxxx" );
> ds.getDriverProperties().put( "password", "xxxxxxxx"
> );
> ds.getDriverProperties().put( "url",
> "mySqlServerUrl..." );
>
> replace the driverClassName, user, password, and url for your setup. I
> am using SQLServer, but I guess you are on MySql.
>
> After that the JPA stuff works, and persistence works as advertised.
> This is the only setup that worked for me. I tried creating the
> datasource from Spring but that didn't work either.
>
> Please let me know what you find out.
>
> Thanks
>
>
> 2010/9/3 Pablo Nussembaum <baunax at gmail.com>:
> > You need to configure bitronix[0] to provide JTA. Or use drools-spring
> that
> > allows you to use drools-persisntece-jpa without JTA.
> >
> > [0] http://docs.codehaus.org/display/BTM/Tomcat13
> > On 09/03/2010 08:53 AM, liang wrote:
> >
> > i found that tomcat 6 have not JTA,which server is able to persistence?
> >
> > 在 2010年9月3日 下午12:02，liang <zhuyx808 at gmail.com>写道：
> >>
> >> THS,Esteban,I found it which is resin's problem, so i replaced it to
> >> tomcat6, i got other questions:
> >>
> >> in my webapp webroot/meta-inf/content.xml:
> >> <?xml version="1.0" encoding="UTF-8"?>
> >> <Context>
> >> <Resource name="jdbc/mysql" auth="Container"
> type="javax.sql.DataSource"
> >> maxActive="10" maxIdle="2" maxWait="10000"
> >> logAbandoned="true"
> >> username="root" password="111111"
> >> driverClassName="com.mysql.jdbc.Driver"
> >> url="jdbc:mysql://localhost:3306/test"/>
> >> </Context>
> >>
> >> webroot/web-inf/web.xml:
> >>
> >> <resource-ref>
> >> <description>DB Connection</description>
> >> <res-ref-name>jdbc/mysql</res-ref-name>
> >> <res-type>javax.sql.DataSource</res-type>
> >> <res-auth>Container</res-auth>
> >> </resource-ref>
> >>
> >> webroot/meta-inf/persistence.xml:
> >>
> >> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> >> <persistence
> >> version="1.0"
> >> xsi:schemaLocation=
> >> "http://java.sun.com/xml/ns/persistence
> >> http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
> >> http://java.sun.com/xml/ns/persistence/orm
> >> http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
> >> xmlns:orm="http://java.sun.com/xml/ns/persistence/orm"
> >> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> >> xmlns="http://java.sun.com/xml/ns/persistence">
> >>
> >> <!--persistence-unit name="ProcessService">
> >> <jta-data-source>java:/DefaultDS</jta-data-source>
> >> <properties>
> >> <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
> >> </properties>
> >> </persistence-unit-->
> >>
> >> <persistence-unit name="org.drools.persistence.jpa"
> >> transaction-type="JTA">
> >> <provider>org.hibernate.ejb.HibernatePersistence</provider>
> >> <jta-data-source>java:comp/env/jdbc/mysql</jta-data-source>
> >> <class>org.drools.persistence.session.SessionInfo</class>
> >>
> <class>org.drools.persistence.processinstance.ProcessInstanceInfo</class>
> >>
> >>
> <class>org.drools.persistence.processinstance.ProcessInstanceEventInfo</class>
> >> <class>org.drools.persistence.processinstance.WorkItemInfo</class>
> >>
> >>
> >> <properties>
> >> <property name="hibernate.dialect"
> >> value="org.hibernate.dialect.MySQLDialect"/>
> >> <property name="hibernate.max_fetch_depth" value="3"/>
> >> <property name="hibernate.hbm2ddl.auto" value="create" />
> >> <property name="hibernate.show_sql" value="true" />
> >> <property name="hibernate.transaction.manager_lookup_class"
> >> value="org.hibernate.transaction.BTMTransactionManagerLookup" />
> >> </properties>
> >> </persistence-unit>
> >>
> >> </persistence>
> >>
> >> webroot/testJNDI.jsp:
> >>
> >> <%@ page import='java.sql.*, javax.sql.*, javax.naming.*' %>
> >> <%
> >> Context ic = new InitialContext();
> >> DataSource ds = (DataSource) ic.lookup("java:comp/env/jdbc/mysql");
> >>
> >> Connection conn = ds.getConnection();
> >>
> >> try {
> >> Statement stmt = conn.createStatement();
> >> ResultSet rs = stmt.executeQuery("select * from test");
> >> while (rs.next()) { %>
> >> <%= rs.getString(1) %> <%= rs.getString(2) %><br><%
> >> }
> >> } finally {
> >> conn.close();
> >> }
> >> %>
> >>
> >> webroot/testDroolsFlow.jsp:
> >>
> >> <%@ page import='java.sql.*, javax.sql.*, javax.naming.*,com.abc.*' %>
> >> <%
> >> VdcService.exec();
> >> %>
> >>
> >> run the testJNDI.jsp,its OK.when i run testDroolsFlow.jsp, appears this
> >> exception:
> >>
> >> java.lang.RuntimeException: Could not commit session
> >> at
> >>
> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:119)
> >> at
> >>
> org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.newStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:44)
> >> at
> >>
> org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:93)
> >> at com.abc.VdcService.exec(VdcService.java:39)
> >> at
> >>
> org.apache.jsp._testDroolsFlow_jsp._jspService(_testDroolsFlow_jsp.java:60)
> >> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> >> at
> >>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
> >> at
> >> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
> >> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> >> 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:127)
> >> 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:298)
> >> at
> >>
> org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
> >> at
> >>
> org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
> >> at
> >> org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
> >> at java.lang.Thread.run(Thread.java:619)
> >> Caused by: javax.naming.NamingException: Cannot create resource instance
> >> at
> >>
> org.apache.naming.factory.TransactionFactory.getObjectInstance(TransactionFactory.java:113)
> >> at
> >> javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
> >> at org.apache.naming.NamingContext.lookup(NamingContext.java:793)
> >> at org.apache.naming.NamingContext.lookup(NamingContext.java:140)
> >> at org.apache.naming.NamingContext.lookup(NamingContext.java:781)
> >> at org.apache.naming.NamingContext.lookup(NamingContext.java:153)
> >> at
> org.apache.naming.SelectorContext.lookup(SelectorContext.java:152)
> >> at javax.naming.InitialContext.lookup(InitialContext.java:392)
> >> at
> >>
> org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:102)
> >> ... 22 more
> >>
> >> JNDI is OK,so i guess the question is in drools side,is right of my
> guess?
> >> the exception is here:
> >> 38 StatefulKnowledgeSession ksession =
> >> 39 JPAKnowledgeService.newStatefulKnowledgeSession(
> >> kbase, null, env );
> >>
> >>
> >>
> >> PS:
> >>
> >> i write the webapp is want to know:
> >>
> >> 1. How to save drools into database
> >>
> >> 2. What data is saved in the tables; are all the instances of a
> >> process stored?
> >>
> >> 3. Are all nodes in a ruleflow saved?
> >>
> >> 4. Are there any nodes which are not running saved in the tables?
> >>
> >> 5. What status are running and non-running nodes in the tables?
> >>
> >> 2010/9/1 Esteban Aliverti <esteban.aliverti at gmail.com>
> >>>
> >>> As far as I can see, this has nothing to do with drools. You can't even
> >>> create the EntityManagerFactory. Try to set a finest log level
> >>> for com.caucho.amber.* and org.hibernate.* to see why it is throwing a
> NPE.
> >>> Best,
> >>>
> >>> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> >>>
> >>> Esteban Aliverti
> >>> - Developer @ http://www.plugtree.com
> >>> - Blog @ http://ilesteban.wordpress.com
> >>>
> >>>
> >>> 2010/9/1 亮亮 <zhuyx808 at gmail.com>
> >>>>
> >>>> hi:
> >>>>
> >>>> in my webapp, I use JPA to store the runtime state,i use this code in
> >>>> VdcService.java which is a sample java class:
> >>>>
> >>>> EntityManagerFactory emf =Persistence.createEntityManagerFactory(
> >>>> "org.drools.persistence.jpa" );
> >>>> Environment env = KnowledgeBaseFactory.newEnvironment();
> >>>> env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
> >>>>
> >>>> // create a new knowledge session that uses JPA to store the runtime
> >>>> state
> >>>> StatefulKnowledgeSession ksession =
> >>>> JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env );
> >>>>
> >>>> I put persistence.xml to webRoot/META-INF/ , persistence.xml:
> >>>>
> >>>> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> >>>> <persistence
> >>>> version="1.0"
> >>>> xsi:schemaLocation=
> >>>> "http://java.sun.com/xml/ns/persistence
> >>>> http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd
> >>>> http://java.sun.com/xml/ns/persistence/orm
> >>>> http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
> >>>> xmlns:orm="http://java.sun.com/xml/ns/persistence/orm"
> >>>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> >>>> xmlns="http://java.sun.com/xml/ns/persistence">
> >>>>
> >>>> <persistence-unit name="org.drools.persistence.jpa"
> >>>> transaction-type="JTA">
> >>>> <provider>org.hibernate.ejb.HibernatePersistence</provider>
> >>>>
> >>>> <jta-data-source>java:comp/env/jdbc/mysql</jta-data-source>
> >>>> <class>org.drools.persistence.session.SessionInfo</class>
> >>>>
> >>>>
> <class>org.drools.persistence.processinstance.ProcessInstanceInfo</class>
> >>>>
> >>>>
> <class>org.drools.persistence.processinstance.ProcessInstanceEventInfo</class>
> >>>> <class>org.drools.persistence.processinstance.WorkItemInfo</class>
> >>>>
> >>>>
> >>>> <properties>
> >>>> <property name="hibernate.dialect"
> >>>> value="org.hibernate.dialect.MySQLDialect"/>
> >>>> <property name="hibernate.max_fetch_depth" value="3"/>
> >>>> <property name="hibernate.hbm2ddl.auto" value="create" />
> >>>> <property name="hibernate.show_sql" value="true" />
> >>>> <property
> name="hibernate.transaction.manager_lookup_class"
> >>>> value="org.hibernate.transaction.BTMTransactionManagerLookup" />
> >>>> </properties>
> >>>> </persistence-unit>
> >>>>
> >>>> </persistence>
> >>>>
> >>>> I use resin 3.1.10, $resin-home/conf/resin.conf:
> >>>>
> >>>> <database>
> >>>> <jndi-name>jdbc/mysql</jndi-name>
> >>>> <driver type="org.gjt.mm.mysql.Driver">
> >>>> <url>jdbc:mysql://127.0.0.1:3306/test</url>
> >>>> <user>root</user>
> >>>> <password></password>
> >>>> </driver>
> >>>>
> >>>> <prepared-statement-cache-size>8</prepared-statement-cache-size>
> >>>> <max-connections>20</max-connections>
> >>>> <max-idle-time>30s</max-idle-time>
> >>>> </database>
> >>>>
> >>>> when i run this webapp , i got this exception:
> >>>>
> >>>> java.lang.NullPointerException
> >>>> at
> >>>>
> com.caucho.amber.manager.AmberPersistenceProvider.createEntityManagerFactory(AmberPersistenceProvider.java:65)
> >>>> at
> >>>>
> javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
> >>>> at com.abc.abc.service.VdcService.exec(VdcService.java:32)
> >>>> at com.abc.abc.resources.Apply.apply(Apply.java:55)
> >>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>>> at
> >>>>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> >>>> at
> >>>>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>>> at java.lang.reflect.Method.invoke(Method.java:597)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:156)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:208)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:75)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:115)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:67)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:724)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:689)
> >>>> at
> >>>>
> com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:680)
> >>>> at
> >>>>
> com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:324)
> >>>> at
> >>>>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:425)
> >>>> at
> >>>>
> com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:604)
> >>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
> >>>> at
> >>>>
> com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
> >>>> at
> >>>>
> org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
> >>>> at
> >>>>
> com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
> >>>> at
> >>>>
> org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)
> >>>> at
> >>>>
> com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)
> >>>> at
> >>>>
> com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)
> >>>> at
> >>>>
> com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)
> >>>> at
> >>>> com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)
> >>>> at
> com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)
> >>>> at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)
> >>>> at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)
> >>>> at java.lang.Thread.run(Thread.java:619)
> >>>>
> >>>> i can't solve it.How to solve it?help me ,THS
> >>>>
> >>>> _______________________________________________
> >>>> rules-users mailing list
> >>>> rules-users at lists.jboss.org
> >>>> https://lists.jboss.org/mailman/listinfo/rules-users
> >>>>
> >>>
> >>>
> >>> _______________________________________________
> >>> rules-users mailing list
> >>> rules-users at lists.jboss.org
> >>> https://lists.jboss.org/mailman/listinfo/rules-users
> >>>
> >>
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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