[rules-users] Persistence.createEntityManagerFactory NullPointerException
liang
zhuyx808 at gmail.com
Fri Sep 3 00:02:33 EDT 2010
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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20100903/0f2a5fa2/attachment.html
More information about the rules-users
mailing list