Invoking a Spring bean from Activiti Explorer

[mialtuna]

Hello,

Is it possible to invoke Spring beans after a User Task is confirmed in a Activiti Explorer?

We are deploying our Spring application war and the Activiti Explorer war in the same app server. The problem is that if after a user task confirmed using the Explorer the process has to continue with a service task that executes a Spring method, the bean is not known for the Explorer and we have got the next exception

Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'ourBean'
at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.juel.AstMethod.invoke(AstMethod.java:79) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.juel.AstMethod.eval(AstMethod.java:75) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25) [activiti-engine-5.10.jar:5.10]
   at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:50) [activiti-engine-5.10.jar:5.10]
‍‍‍‍‍‍‍‍‍‍‍‍

As there are 2 diferents apps, they have got their own spring contexts.

What would be the best approach to solve that problem?

Thanks in advance!

[frederikherema1]

Isn't it possible to run the apps in the same wabapp (difference servlet-mappings), sharing the same application-context? If not, you should define remote-beans in the explorer-app-context that have a spring-remote counterpart in your own app. Or use any other remote technique…

[mialtuna]

frederikheremans thank you for your reply!

Isn't it possible to run the apps in the same wabapp (difference servlet-mappings), sharing the same application-context?

How can I do that? Adding Activiti Explorer sources in my project?

Thanks in advance!

[frederikherema1]

Vaadin allows streaming the resources from a jar-file, so you don't have to include sources. Take a look at the assembly.xml in activiti-webapp-explorer2, this contains a description of a jar-version of the web app, that is used in Alfresco enterprise.

Go to the folder "modules/activiti-webapp-explorer2/" and run "mvn package assembly:assembly". You'll have a jar in your target called "activiti-***-ui.jar". The only thing left to do is configure the Vaadin-servlet in your application (see the web.xml in explorer2).

You might want to alter is the "ui.properties" in the JAR-file to contain this value:

activiti.ui.environment = activiti

To include the activiti-context, just import "activiti-ui-context.xml" in the general spring-config.

This way, you can upgrade easily, by creating a new ui-jar from the activiti-sources and just dump in in your web app

[mialtuna]

Thanks again frederikheremans!

I´ve created the jar you mentions in your previous post and now I´ve got problems initializing the context. Is it necesary to edit something else in the jar to make it work with the global context?

Caused by: java.lang.NullPointerException
at org.activiti.explorer.navigation.TaskNavigator.<init>(TaskNavigator.java:53) [activiti-webapp-explorer2-5.11-SNAPSHOT-ui-jar.jar:]
at org.activiti.explorer.navigation.NavigatorManager.afterPropertiesSet(NavigatorManager.java:60) [activiti-webapp-explorer2-5.11-SNAPSHOT-ui-jar.jar:]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514) [spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452) [spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
… 20 more

[mialtuna]

Sorry!!

I was importing the activiti-ui.context.xml before creating taskService bean

[mialtuna]

There is something yet that is not working propertly…. :cry:

The Activiti-Explorer throws me and exception caused becouse VAADIN widgetset is missign in root/VAADIN/ directory.

If I add this foldes manualy to the project, the login page is displayed without problems. 

The problems is that when I logged in I only see a white screen.

Thanks!

[frederikherema1]

Is the following included in your web.xml?


<servlet>
   <servlet-name>Vaadin Application Servlet</servlet-name>
   <servlet-class>org.activiti.explorer.servlet.ExplorerApplicationServlet</servlet-class>
</servlet>


<servlet-mapping>
   <servlet-name>Vaadin Application Servlet</servlet-name>
   <url-pattern>/activiti-explorer2/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
   <servlet-name>Vaadin Application Servlet</servlet-name>
   <url-pattern>/VAADIN/*</url-pattern>
</servlet-mapping>


[mialtuna]

SOLVED!

frederikheremans, you are the boss!  :lol:

[mialtuna]

Hello,

I´m upgrading to 5.11 and I´ve got a problem with the servlet mapping and the modeler.

When I try to edit a definition, a white page with Activiti BPM Suite header is shown.

I suppose that is a mapping problem but I´m getting crazy!

Can anybody help me?

Thanks in advance!

This is my mapping configuration.

  <servlet>
  <servlet-name>Vaadin Application Servlet</servlet-name>
  <servlet-class>org.activiti.explorer.servlet.ExplorerApplicationServlet</servlet-class>
  </servlet>
 
   <!– Restlet adapter, used to expose modeler functionality through REST –>
<servlet>
  <servlet-name>RestletServlet</servlet-name>
  <servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
  <init-param>
   <!– Application class name –>
   <param-name>org.restlet.application</param-name>
   <param-value>org.activiti.editor.rest.application.ActivitiRestApplication</param-value>
  </init-param>
</servlet>
   <servlet-mapping>
    <servlet-name>Vaadin Application Servlet</servlet-name>
    <url-pattern>/activiti-explorer2/*</url-pattern>
  </servlet-mapping>
  <servlet-mapping>
     <servlet-name>Vaadin Application Servlet</servlet-name>
     <url-pattern>/VAADIN/*</url-pattern>
  </servlet-mapping> 
  <servlet-mapping>
  <servlet-name>Vaadin Application Servlet</servlet-name>
  <url-pattern>/activiti-explorer/*</url-pattern>
  </servlet-mapping>
  
   <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>/activiti-explorer/api/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>/activiti-explorer/editor/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>/activiti-explorer/explorer/*</url-pattern>
</servlet-mapping>

<servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>/activiti-explorer/libs/*</url-pattern>
</servlet-mapping>

<!– Catch all service requests –>
<servlet-mapping>
  <servlet-name>RestletServlet</servlet-name>
  <url-pattern>/activiti-explorer/service/*</url-pattern>
</servlet-mapping>