[rules-users] Persistence.createEntityManagerFactory NullPointerException
liang
zhuyx808 at gmail.com
Fri Sep 3 07:53:47 EDT 2010
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
>>>
>>>
>>
>> _______________________________________________
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>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>
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