topic Re: Problem with events in Alfresco Archive

Problem with events

swsw1 — Fri, 24 Oct 2014 08:58:44 GMT

I have got a Vaadin application with a Button which throws events of type ClickEvent. Although I imported all activity-jars, there is always a NullPointerException - I cannot create the ProcessEngine. The exception reads as followservlet.service() for servlet [Vaadin Application] in context with p

Re: Problem with events

jbarrez — Mon, 27 Oct 2014 11:03:20 GMT

So you mean that ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine(); gives a NPE?
By default, Activiti will look for an activiti.cfg.xml file on the classpath. Do you have that?

Re: Problem with events

swsw1 — Mon, 03 Nov 2014 08:42:30 GMT

Thank You! Being a noob, I forgot adding the cfg.xml to the classpath. Now, there is still a classloader problem, but the creation of the engine is working now.

Re: Problem with events

swsw1 — Fri, 07 Nov 2014 15:04:26 GMT

http://forums.activiti.org/
swsw 666sdf76

I have started programming a new application where I also want to create my process engine based on a activiti.cfg.xml-file (and once again I take the one that is there in the documentation), and again, I am running into a nullpointer exception, and everything I tried in order to add the cfg.xml-file to the classpath did not succeed.

On running my code on Tomcat, I have a NullPointerException for my "processEngine" remains null.

…

<code>ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
RuntimeService runtimeService = processEngine.getRuntimeService();</code>

…

So what do I have to do to add the activiti.cfg.xml to my classpath?

Here is my activiti.cfg.xml:

<code>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">

    <property name="jdbcUrl" value="jdbc:h2:mem:activiti;DB_CLOSE_DELAY=1000" />
    <property name="jdbcDriver" value="org.h2.Driver" />
    <property name="jdbcUsername" value="sa" />
    <property name="jdbcPassword" value="" />

    <property name="databaseSchemaUpdate" value="true" />

    <property name="jobExecutorActivate" value="false" />

    <property name="mailServerHost" value="mail.my-corp.com" />
    <property name="mailServerPort" value="5025" />
</bean>

</beans>
</code>

Re: Problem with events

jbarrez — Mon, 10 Nov 2014 11:44:53 GMT

Just put it on the tomcat classpath: /lib or (better) WEB-INF/lib of the war

Re: Problem with events

swsw1 — Wed, 12 Nov 2014 17:13:53 GMT

Thank You, now it is working, after all 🙂