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You need to configure bitronix[0] to provide JTA. Or use drools-spring
that allows you to use drools-persisntece-jpa without JTA.<br>
<br>
[0] <a class="moz-txt-link-freetext" href="http://docs.codehaus.org/display/BTM/Tomcat13">http://docs.codehaus.org/display/BTM/Tomcat13</a><br>
On 09/03/2010 08:53 AM, liang wrote:
<blockquote
cite="mid:AANLkTi=cMnwHja75tOdH8vWnybNszBzRmxA9RZdguzTB@mail.gmail.com"
type="cite">i found that tomcat 6 have not JTA,which server is able to
persistence?<span style="background-color: rgb(204, 204, 255);"> </span><br>
<br>
<div class="gmail_quote">在 2010年9月3日 下午12:02，liang <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:zhuyx808@gmail.com">zhuyx808@gmail.com</a>></span>写
道：<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">THS,Esteban,I
found it which is resin's problem, so i replaced it to tomcat6, i got
other questions:<br>
<br>
in my webapp webroot/meta-inf/content.xml:<br>
<div style="text-align: left; margin-left: 40px;"><span
style="background-color: rgb(204, 204, 255);"><?xml version="1.0"
encoding="UTF-8"?></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"><Context></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <Resource
name="jdbc/mysql" auth="Container" type="javax.sql.DataSource"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
maxActive="10" maxIdle="2" maxWait="10000" logAbandoned="true"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
username="root" password="111111"
driverClassName="com.mysql.jdbc.Driver"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
url="jdbc:mysql://localhost:3306/test"/></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"></Context></span><br>
<br>
</div>
<div style="text-align: left;">webroot/web-inf/web.xml:<br>
<br>
<div style="margin-left: 40px;"> <span
style="background-color: rgb(204, 204, 255);"><resource-ref></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<description>DB Connection</description></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<res-ref-name>jdbc/mysql</res-ref-name></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<res-type>javax.sql.DataSource</res-type></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<res-auth>Container</res-auth></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"></resource-ref></span><br>
</div>
</div>
<div style="text-align: left; margin-left: 40px;"><br>
</div>
<div style="text-align: left;">webroot/meta-inf/persistence.xml:<br>
<br>
<div style="margin-left: 40px;">
<div class="im"><span style="background-color: rgb(204, 204, 255);"><?xml
version="1.0" encoding="UTF-8" standalone="yes"?></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"><persistence</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
version="1.0"</span><br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
xsi:schemaLocation=</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> "<a
moz-do-not-send="true" href="http://java.sun.com/xml/ns/persistence"
target="_blank">http://java.sun.com/xml/ns/persistence</a></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <a
moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
target="_blank">http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd</a></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <a
moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm" target="_blank">http://java.sun.com/xml/ns/persistence/orm</a>
</span><br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <a
moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
target="_blank">http://java.sun.com/xml/ns/persistence/orm_1_0.xsd</a>"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> xmlns:orm="<a
moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm" target="_blank">http://java.sun.com/xml/ns/persistence/orm</a>"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> xmlns:xsi="<a
moz-do-not-send="true" href="http://www.w3.org/2001/XMLSchema-instance"
target="_blank">http://www.w3.org/2001/XMLSchema-instance</a>"</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> xmlns="<a
moz-do-not-send="true" href="http://java.sun.com/xml/ns/persistence"
target="_blank">http://java.sun.com/xml/ns/persistence</a>"></span><br
style="background-color: rgb(204, 204, 255);">
<br style="background-color: rgb(204, 204, 255);">
</div>
<span style="background-color: rgb(204, 204, 255);"> <!--persistence-unit
name="ProcessService"></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<jta-data-source>java:/DefaultDS</jta-data-source></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<properties></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <property
name="hibernate.hbm2ddl.auto" value="create-drop"/></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
</properties></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> </persistence-unit--></span>
<div class="im"><br style="background-color: rgb(204, 204, 255);">
<br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<persistence-unit name="org.drools.persistence.jpa"
transaction-type="JTA"></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<provider>org.hibernate.ejb.HibernatePersistence</provider></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<jta-data-source>java:comp/env/jdbc/mysql</jta-data-source>
</span><br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<class>org.drools.persistence.session.SessionInfo</class></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> <class>org.drools.persistence.processinstance.ProcessInstanceInfo</class></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<class>org.drools.persistence.processinstance.ProcessInstanceEventInfo</class></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<class>org.drools.persistence.processinstance.WorkItemInfo</class></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> </span><br
style="background-color: rgb(204, 204, 255);">
<br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<properties></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<property name="hibernate.dialect"
value="org.hibernate.dialect.MySQLDialect"/> </span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<property name="hibernate.max_fetch_depth" value="3"/></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<property name="hibernate.hbm2ddl.auto" value="create" /></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<property name="hibernate.show_sql" value="true" /> </span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
<property name="hibernate.transaction.manager_lookup_class"
value="org.hibernate.transaction.BTMTransactionManagerLookup" /></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
</properties> </span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">
</persistence-unit></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> </span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"></persistence></span><br>
</div>
</div>
<br>
webroot/testJNDI.jsp:<br>
<br>
<div style="margin-left: 40px;"><span
style="background-color: rgb(204, 204, 255);"><%@ page
import='java.sql.*, javax.sql.*, javax.naming.*' %></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"><%</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">Context ic =
new InitialContext();</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">DataSource ds =
(DataSource) ic.lookup("java:comp/env/jdbc/mysql");</span><br
style="background-color: rgb(204, 204, 255);">
<br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">Connection conn
= ds.getConnection();</span><br
style="background-color: rgb(204, 204, 255);">
<br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">try {</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> Statement
stmt = conn.createStatement();</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> ResultSet rs
= stmt.executeQuery("select * from test");</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> while
(rs.next()) { %></span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"><%=
rs.getString(1) %> <%= rs.getString(2) %><br><%</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> }</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">} finally {</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> conn.close();</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">}</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">%></span><br>
<br>
</div>
webroot/testDroolsFlow.jsp:<br>
<br>
<div style="margin-left: 40px;"><span
style="background-color: rgb(204, 204, 204);"><%@ page
import='java.sql.*, javax.sql.*, javax.naming.*,com.abc.*' %></span><br
style="background-color: rgb(204, 204, 204);">
<span style="background-color: rgb(204, 204, 204);"><%</span><br
style="background-color: rgb(204, 204, 204);">
<span style="background-color: rgb(204, 204, 204);">VdcService.exec();</span><br
style="background-color: rgb(204, 204, 204);">
<span style="background-color: rgb(204, 204, 204);">%></span><br>
</div>
<br>
run the testJNDI.jsp,its OK.when i run testDroolsFlow.jsp, <span><span
title="">appears</span></span> this exception:<br>
<br style="background-color: rgb(204, 204, 255);">
<div style="margin-left: 40px;"><span
style="background-color: rgb(204, 204, 255);">java.lang.RuntimeException:
Could not commit session</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:119)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.drools.persistence.jpa.impl.JPAKnowledgeServiceProviderImpl.newStatefulKnowledgeSession(JPAKnowledgeServiceProviderImpl.java:44)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.drools.persistence.jpa.JPAKnowledgeService.newStatefulKnowledgeSession(JPAKnowledgeService.java:93)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
com.abc.VdcService.exec(VdcService.java:39)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.jsp._testDroolsFlow_jsp._jspService(_testDroolsFlow_jsp.java:60)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)</span>
<div class="im"><br style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
java.lang.Thread.run(Thread.java:619)</span><br
style="background-color: rgb(204, 204, 255);">
</div>
<span style="background-color: rgb(204, 204, 255);">Caused by:
javax.naming.NamingException: Cannot create resource instance</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.factory.TransactionFactory.getObjectInstance(TransactionFactory.java:113)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.NamingContext.lookup(NamingContext.java:793)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.NamingContext.lookup(NamingContext.java:140)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.NamingContext.lookup(NamingContext.java:781)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.NamingContext.lookup(NamingContext.java:153)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.apache.naming.SelectorContext.lookup(SelectorContext.java:152)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
javax.naming.InitialContext.lookup(InitialContext.java:392)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> at
org.drools.persistence.session.SingleSessionCommandService.<init>(SingleSessionCommandService.java:102)</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);"> ... 22 more</span><br>
<br>
</div>
JNDI is OK,so i <span><span title="">guess the </span></span>question
is in drools side,<span><span title="">is right of my guess? </span></span>the
exception is here:<br>
<span style="background-color: rgb(204, 204, 255);">38
StatefulKnowledgeSession ksession =</span><br
style="background-color: rgb(204, 204, 255);">
<span style="background-color: rgb(204, 204, 255);">39
JPAKnowledgeService.newStatefulKnowledgeSession( kbase,
null, env );</span><br>
<span><span title=""></span></span><br>
<br>
<br>
<p class="MsoNormal"><span lang="EN-US">PS:</span></p>
<p class="MsoNormal"><span lang="EN-US">i write the webapp is want
to know:</span></p>
<p style="margin-left: 18pt;"><span lang="EN-US"><span>1.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><span lang="EN-US">How to save drools into
database</span></p>
<p style="margin-left: 18pt;"><span lang="EN-US"><span>2.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><span lang="EN-US">What data is saved in the
tables; are all the instances of a process
stored?</span></p>
<p style="margin-left: 18pt;"><span lang="EN-US"><span>3.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><span lang="EN-US">Are all nodes in a ruleflow
saved?</span></p>
<p style="margin-left: 18pt;"><span lang="EN-US"><span>4.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><span lang="EN-US">Are there any nodes which
are not running saved in the tables?</span></p>
<p style="margin-left: 18pt;"><span lang="EN-US"><span>5.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none;">
</span></span></span><span lang="EN-US">What status are running and
non-running nodes in the tables?</span></p>
<br>
<br>
</div>
<div class="gmail_quote">2010/9/1 Esteban Aliverti <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:esteban.aliverti@gmail.com"
target="_blank">esteban.aliverti@gmail.com</a>></span>
<div>
<div class="h5"><br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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 <span
style="font-family: arial,sans-serif; font-size: 13px; border-collapse: collapse;">org.hibernate.*</span> to
see why it is throwing a NPE.
<div><br>
</div>
<div>Best,<br clear="all">
<br>
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br>
<br>
Esteban Aliverti<br>
- Developer @ <a moz-do-not-send="true" href="http://www.plugtree.com"
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- Blog @ <a moz-do-not-send="true"
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<div class="gmail_quote">2010/9/1 亮亮 <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:zhuyx808@gmail.com" target="_blank">zhuyx808@gmail.com</a>></span><br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div>hi:<br>
<br>
in my webapp, I use JPA to store the runtime state,i use this code in
VdcService.java which is a sample java class:<br>
<br>
<div style="margin-left: 40px;">EntityManagerFactory emf
=Persistence.createEntityManagerFactory( "org.drools.persistence.jpa" );<br>
Environment env = KnowledgeBaseFactory.newEnvironment();<br>
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );<br>
<br>
// create a new knowledge session that uses JPA to store the runtime
state<br>
StatefulKnowledgeSession ksession =
JPAKnowledgeService.newStatefulKnowledgeSession( kbase, null, env );<br>
</div>
<br>
I put persistence.xml to webRoot/META-INF/ , persistence.xml:<br>
<br>
<div style="margin-left: 40px;"><?xml version="1.0"
encoding="UTF-8" standalone="yes"?><br>
<persistence<br>
version="1.0"<br>
xsi:schemaLocation=<br>
"<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><br>
<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
target="_blank">http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd</a><br>
<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm" target="_blank">http://java.sun.com/xml/ns/persistence/orm</a>
<br>
<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
target="_blank">http://java.sun.com/xml/ns/persistence/orm_1_0.xsd</a>"<br>
xmlns:orm="<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence/orm" target="_blank">http://java.sun.com/xml/ns/persistence/orm</a>"<br>
xmlns:xsi="<a moz-do-not-send="true"
href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a>"<br>
xmlns="<a moz-do-not-send="true"
href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a>"><br>
<br>
<persistence-unit name="org.drools.persistence.jpa"
transaction-type="JTA"><br>
<provider>org.hibernate.ejb.HibernatePersistence</provider><br>
<jta-data-source>java:comp/env/jdbc/mysql</jta-data-source>
<br>
<class>org.drools.persistence.session.SessionInfo</class><br>
<class>org.drools.persistence.processinstance.ProcessInstanceInfo</class><br>
<class>org.drools.persistence.processinstance.ProcessInstanceEventInfo</class><br>
<class>org.drools.persistence.processinstance.WorkItemInfo</class><br>
<br>
<br>
<properties><br>
<property name="hibernate.dialect"
value="org.hibernate.dialect.MySQLDialect"/> <br>
<property name="hibernate.max_fetch_depth" value="3"/><br>
<property name="hibernate.hbm2ddl.auto" value="create"
/><br>
<property name="hibernate.show_sql" value="true"
/> <br>
<property
name="hibernate.transaction.manager_lookup_class"
value="org.hibernate.transaction.BTMTransactionManagerLookup" /><br>
</properties> <br>
</persistence-unit><br>
<br>
</persistence><br>
</div>
<br>
I use resin 3.1.10, $resin-home/conf/resin.conf:<br>
<br>
<div style="margin-left: 40px;"> <database><br>
<jndi-name>jdbc/mysql</jndi-name><br>
<driver type="org.gjt.mm.mysql.Driver"><br>
<url>jdbc:mysql://<a moz-do-not-send="true"
href="http://127.0.0.1:3306/test" target="_blank">127.0.0.1:3306/test</a></url><br>
<user>root</user><br>
<password></password><br>
</driver><br>
<prepared-statement-cache-size>8</prepared-statement-cache-size><br>
<max-connections>20</max-connections><br>
<max-idle-time>30s</max-idle-time><br>
</database><br>
</div>
<br>
when i run this webapp , i got this exception:<br>
<br>
java.lang.NullPointerException<br>
at
com.caucho.amber.manager.AmberPersistenceProvider.createEntityManagerFactory(AmberPersistenceProvider.java:65)<br>
at
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:69)<br>
at com.abc.abc.service.VdcService.exec(VdcService.java:32)<br>
at com.abc.abc.resources.Apply.apply(Apply.java:55)<br>
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br>
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br>
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br>
at java.lang.reflect.Method.invoke(Method.java:597)<br>
at
com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:156)<br>
at
com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)<br>
at
com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:208)<br>
at
com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:75)<br>
at
com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:115)<br>
at
com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:67)<br>
at
com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:724)<br>
at
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:689)<br>
at
com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:680)<br>
at
com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:324)<br>
at
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:425)<br>
at
com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:604)<br>
at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)<br>
at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)<br>
at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)<br>
at
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)<br>
at
org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)<br>
at
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87)<br>
at
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187)<br>
at
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265)<br>
at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:273)<br>
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682)<br>
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:743)<br>
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:662)<br>
at java.lang.Thread.run(Thread.java:619)<br>
<br>
i can't solve it.How to solve it?help me ,THS<br>
<br>
</div>
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