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Error creating bean with name 'taskResourceFactory' defined in class path resource [META-INF/spring/applicationContext.xml]
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created by <a href="https://community.jboss.org/people/avneesh">Avneesh Sisodia</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/761043#761043">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi,</p><p>When I am trying to create Local Task Service for jbpm human task using spring framework. It throwing exception. </p><p>I have a java class </p><p>TaskResourceFactory.java</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> <font color="navy"><b>class</b></font> TaskResourceFactory <font color="navy"><b>implements</b></font> ApplicationContextAware <font color="navy">{</font>
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>final</b></font> Logger logger = LoggerFactory.getLogger(TaskResourceFactory.class);
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> ApplicationContext context;
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> TaskService taskService;
    <font color="navy"><b>private</b></font> <font color="navy"><b>static</b></font> AbstractPlatformTransactionManager transactionManager;
   
    @Override
    <font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> setApplicationContext(ApplicationContext applicationContext)
            <font color="navy"><b>throws</b></font> BeansException <font color="navy">{</font>
        this.context = applicationContext;
    <font color="navy">}</font>
    <font color="navy"><b>public</b></font> TaskResourceFactory(TaskService tService, AbstractPlatformTransactionManager tManager) <font color="navy">{</font>
        TaskResourceFactory.taskService = tService;
        TaskResourceFactory.transactionManager = tManager;
       
    <font color="navy">}</font>
   
   
    <font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> LocalTaskService getTaskClient(TaskService taskService, AbstractPlatformTransactionManager transactionManager) <font color="navy">{</font>
        initializeSessionFactory(transactionManager);
 
        logger.debug(<font color="red">"Creating local task service client, based on {}"</font>,taskService);
        LocalTaskService returnBean = <font color="navy"><b>new</b></font> LocalTaskService(taskService);
 
        logger.debug(<font color="red">"Returning task client: {}"</font>, returnBean.toString());
        <font color="navy"><b>return</b></font> returnBean;
    <font color="navy">}</font>
 
    <font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> <font color="navy"><b>void</b></font> initializeSessionFactory(AbstractPlatformTransactionManager transactionManager) <font color="navy">{</font>
        logger.debug(<font color="red">"Initializing the session factory"</font>);
        TaskSessionSpringFactoryImpl springFactory = (TaskSessionSpringFactoryImpl) context.getBean(<font color="red">"springTaskSessionFactory"</font>);
 
        logger.debug(<font color="red">"Setting the transaction manager, based on {}"</font>,transactionManager);
        TransactionManager taskTx = <font color="navy"><b>new</b></font> DroolsSpringTransactionManager(transactionManager);
        springFactory.setTransactionManager(taskTx);
 
        logger.debug(<font color="red">"Initializing"</font>);
        springFactory.initialize();
    <font color="navy">}</font>
    <font color="navy"><b>public</b></font> TaskService getTaskService() <font color="navy">{</font>
        <font color="navy"><b>return</b></font> taskService;
    <font color="navy">}</font>
    <font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> setTaskService(TaskService taskService) <font color="navy">{</font>
        this.taskService = taskService;
    <font color="navy">}</font>
    <font color="navy"><b>public</b></font> AbstractPlatformTransactionManager getTransactionManager() <font color="navy">{</font>
        <font color="navy"><b>return</b></font> transactionManager;
    <font color="navy">}</font>
    <font color="navy"><b>public</b></font> <font color="navy"><b>void</b></font> setTransactionManager(
            AbstractPlatformTransactionManager transactionManager) <font color="navy">{</font>
        this.transactionManager = transactionManager;
    <font color="navy">}</font>
 
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>When <span style="text-decoration: underline;"><strong>springFactory</strong></span> object is to be create it throwing exception.</p><p>my applicationContext.xml is:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml">     <span class="jive-xml-tag"><bean id="transactionManager" class="org.springframework.transaction.jta.JtaTransactionManager"></span>
        <span class="jive-xml-tag"><property name="transactionManagerName" value="java:jboss/TransactionManager"/></span>
    <span class="jive-xml-tag"></bean></span>   
    <span class="jive-xml-tag"><bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"></span>
        <span class="jive-xml-tag"><property name="jndiName" value="java:jboss/datasources/RI"/></span>
    <span class="jive-xml-tag"></bean></span>   
    <span class="jive-xml-tag"><tx:annotation-driven transaction-manager="transactionManager" /></span>
    <span class="jive-xml-tag"><bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"></span>
        <span class="jive-xml-tag"><property name="showSql" value="true" /></span>     
        <span class="jive-xml-tag"><property name="generateDdl" value="true" /></span>
    <span class="jive-xml-tag"></bean></span>
    <span class="jive-xml-tag"><bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"></span>
        <span class="jive-xml-tag"><property name="persistenceUnitName" value="jbpm" /></span>
        <span class="jive-xml-tag"><property name="dataSource" ref="dataSource" /></span>
        <span class="jive-xml-tag"><property name="jpaVendorAdapter" ref="jpaVendorAdapter" /></span>
    <span class="jive-xml-tag"></bean></span>   
    <span class="jive-xml-tag"><bean id="jpaTxMgr" class="org.springframework.orm.jpa.JpaTransactionManager"></span>
        <span class="jive-xml-tag"><property name="entityManagerFactory" ref="entityManagerFactory" /></span>
        <span class="jive-xml-tag"><property name="nestedTransactionAllowed" value="true"/></span>
    <span class="jive-xml-tag"></bean></span>   
    <span class="jive-xml-tag"><bean id="systemEventListener" class="org.drools.SystemEventListenerFactory" factory-method="getSystemEventListener" /></span>
    <span class="jive-xml-tag"><bean id="taskService" class="org.jbpm.task.service.TaskService" ></span>
        <span class="jive-xml-tag"><property name="systemEventListener" ref="systemEventListener" /></span>
    <span class="jive-xml-tag"></bean></span>   
    <span class="jive-xml-tag"><bean id="htEm" class="org.springframework.orm.jpa.support.SharedEntityManagerBean"></span>
           <span class="jive-xml-tag"><property name="entityManagerFactory" ref="entityManagerFactory"/></span>
   <span class="jive-xml-tag"></bean></span>
      <span class="jive-xml-tag"><bean id="htTxMgr" class="org.drools.container.spring.beans.persistence.HumanTaskSpringTransactionManager"></span>
        <span class="jive-xml-tag"><constructor-arg ref="transactionManager" /></span>
    <span class="jive-xml-tag"></bean></span>      
    <span class="jive-xml-tag"><bean id="springTaskSessionFactory" class="org.jbpm.task.service.persistence.TaskSessionSpringFactoryImpl" depends-on="taskService" ></span>
        <span class="jive-xml-tag"><property name="transactionManager" ref="htTxMgr" /></span>
        <span class="jive-xml-tag"><property name="useJTA" value="true" /></span>
        <span class="jive-xml-tag"><property name="taskService" ref="taskService" /></span>
     <span class="jive-xml-tag"></bean></span>
    <span class="jive-xml-tag"><bean id="taskResourceFactory" class="com.nijhazer.jbpm.quickstart.TaskResourceFactory" factory-method="getTaskClient"></span>    
            <span class="jive-xml-tag"><constructor-arg type="org.jbpm.task.service.TaskService" ref="taskService" /></span>
           <span class="jive-xml-tag"><constructor-arg type="org.springframework.transaction.support.AbstractPlatformTransactionManager" ref="transactionManager" /></span>
    <span class="jive-xml-tag"></bean></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>stacktrace is:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java">13:18:57,120 INFO  [stdout] (MSC service thread 1-1) org.springframework.beans.factory.BeanCreationException:
Error creating bean with name <font color="navy">'taskResourceFactory'</font> defined in <font color="navy"><b>class</b></font> path resource [META-INF/spring/applicationContext.xml]:
Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException:
Factory method [<font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> org.jbpm.task.service.local.LocalTaskService com.nijhazer.jbpm.quickstart.TaskResourceFactory.getTaskClient
(org.jbpm.task.service.TaskService,org.springframework.transaction.support.AbstractPlatformTransactionManager)]
threw exception; nested exception is java.lang.NullPointerException
 
13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)
 
13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod
(AbstractAutowireCapableBeanFactory.java:1015)
 
13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance
(AbstractAutowireCapableBeanFactory.java:911)
 
13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
 
13:18:57,120 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)
 
13:18:57,121 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.apache.catalina.core.StandardContext.contextListenerStart(StandardContext.java:3368)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.apache.catalina.core.StandardContext.start(StandardContext.java:3821)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:70)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1)     at java.lang.Thread.run(Thread.java:662)
 
13:18:57,122 INFO  [stdout] (MSC service thread 1-1) Caused by: org.springframework.beans.factory.BeanDefinitionStoreException:
Factory method [<font color="navy"><b>public</b></font> <font color="navy"><b>static</b></font> org.jbpm.task.service.local.LocalTaskService com.nijhazer.jbpm.quickstart.TaskResourceFactory.getTaskClient
(org.jbpm.task.service.TaskService,org.springframework.transaction.support.AbstractPlatformTransactionManager)] threw exception; nested exception is java.lang.NullPointerException
 
13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:169)
 
13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
 
13:18:57,123 INFO  [stdout] (MSC service thread 1-1)     ... 22 more
 
13:18:57,123 INFO  [stdout] (MSC service thread 1-1) Caused by: java.lang.NullPointerException
</code></pre></div>
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