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Re: Basic API Question
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created by <a href="http://community.jboss.org/people/diogosaad">Diogo Saad</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/626293#626293">View the full discussion</a>
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<div class="jive-rendered-content"><p>I'm trying to follow the path indicated by Demian (save and retrieve information from BAM tables) but I simply can not make persistence work.</p><p>I get this exception where I try to excute the following junit test :</p><p class="p2">  </p><p class="p2" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="p1">                    SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();</p><p class="p2" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="p3"><span class="s1">  </span>// Construct DataSource</p><p class="p1">                    JdbcDataSource ds = <span class="s2">new</span> org.h2.jdbcx.JdbcDataSource();</p><p class="p4"><span class="s1">                    ds.setURL(</span>"jdbc:h2:jdbc/DataSource"<span class="s1">);</span></p><p class="p1">                    ds.setUser(<span class="s3">"sa"</span>);</p><p class="p1">                    ds.setPassword(<span class="s3">"sa"</span>);</p><p class="p2">                     builder.bind(<span class="s3">"jdbc/DataSource"</span>, ds);</p><p class="p1" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="p2" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="p1">Environment env = KnowledgeBaseFactory.newEnvironment();</p><p class="p1">env.set( EnvironmentName.<span class="s2">ENTITY_MANAGER_FACTORY</span>, Persistence.createEntityManagerFactory(<span class="s3">"org.jbpm.persistence.jpa"</span>));</p><p class="p2">env.set( EnvironmentName.<span class="s2">TRANSACTION_MANAGER</span>, TransactionManagerServices.getTransactionManager() );</p><p class="p2">session = JPAKnowledgeService.newStatefulKnowledgeSession(<span class="s2">kbase</span>, <span class="s1">null</span>, env);</p><p class="p2" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="p2" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>:</p><p class="p1"><span style="color: #0000ff;"><em><span class="s1">Caused by: </span><span class="s2">java.lang.reflect.InvocationTargetException</span></em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(<span class="s3">Native Method</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at sun.reflect.NativeConstructorAccessorImpl.newInstance(<span class="s3">NativeConstructorAccessorImpl.java:39</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(<span class="s3">DelegatingConstructorAccessorImpl.java:27</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at java.lang.reflect.Constructor.newInstance(<span class="s3">Constructor.java:513</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommanService(<span class="s3">KnowledgeStoreServiceImpl.java:116</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          ... 33 more</em></span></p><p class="p2"><span style="color: #0000ff;"><em>Caused by: <span class="s3">java.lang.RuntimeException</span>: Could not commit session or rollback</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(<span class="s3">SingleSessionCommandService.java:317</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.SingleSessionCommandService.<init>(<span class="s3">SingleSessionCommandService.java:130</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          ... 38 more</em></span></p><p class="p2"><span style="color: #0000ff;"><em>Caused by: <span class="s3">java.lang.RuntimeException</span>: Unable to rollback transaction</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.jta.JtaTransactionManager.rollback(<span class="s3">JtaTransactionManager.java:189</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.SingleSessionCommandService.rollbackTransaction(<span class="s3">SingleSessionCommandService.java:314</span>)</em></span></p><p class="p2"><span style="color: #0000ff;"><em>          ... 39 more</em></span></p><p class="p1"><span style="color: #0000ff;"><em><span class="s1">Caused by: </span><span class="s2">java.lang.NullPointerException</span></em></span></p><p class="p2"><span style="color: #0000ff;"><em>          at org.drools.persistence.jta.JtaTransactionManager.rollback(<span class="s3">JtaTransactionManager.java:185</span>)</em></span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I have:</p><p>1) Created a persistence.xml file under META-INF (attached)</p><p>2)  </p></div>
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