[rules-users] Persistence.createEntityManagerFactory NullPointerException
Pablo Nussembaum
baunax at gmail.com
Fri Sep 3 10:48:48 EDT 2010
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
> <mailto: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
> <mailto: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 <http://www.plugtree.com>
> - Blog @ http://ilesteban.wordpress.com
>
>
> 2010/9/1 亮亮 <zhuyx808 at gmail.com <mailto: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, $resin-home/conf/resin.conf:
>
> <database>
> <jndi-name>jdbc/mysql</jndi-name>
> <driver type="org.gjt.mm.mysql.Driver">
> <url>jdbc:mysql://127.0.0.1:3306/test
> <http://127.0.0.1:3306/test></url>
> <user>root</user>
> <password></password>
> </driver>
> <prepared-statement-cache-size>8</prepared-statement-cache-size>
> <max-connections>20</max-connections>
> <max-idle-time>30s</max-idle-time>
> </database>
>
> when i run this webapp , i got this exception:
>
> java.lang.NullPointerException
> at
> com.caucho.amber.manager.AmberPersistenceProvider.createEntityManagerFactory(AmberPersistenceProvider.java:65)
> at
> javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)
> at com.abc.abc.service.VdcService.exec(VdcService.java:32)
> at com.abc.abc.resources.Apply.apply(Apply.java:55)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$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
> <mailto:rules-users at lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org <mailto: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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20100903/bf128c6c/attachment.html
More information about the rules-users
mailing list