topic Re: Running Activiti in Google App Engine in Alfresco Archive

Running Activiti in Google App Engine

ekolesnikov — Fri, 04 Apr 2014 02:38:54 GMT

Hi All,I was able to successfully run Activiti in Google App Engine - however, it did require some magic around ExpressionManager/ExpressionFactory. The only issue apart from that is GAE ban on java.awt.* classes, but that could be remediated by disabling createDiagramOnDeploy on ProcessEngineConfig

Re: Running Activiti in Google App Engine

ekolesnikov — Fri, 04 Apr 2014 03:29:07 GMT

Pull Request:

https://github.com/Activiti/Activiti/pull/244

Re: Running Activiti in Google App Engine

jbarrez — Sat, 05 Apr 2014 07:50:44 GMT

I agree, the instantiation is a bit weird there … using the setter would have been better, as we do everywhere else. But for backwards compatibility, this is definitely better. Thanks!

Re: Running Activiti in Google App Engine

ekolesnikov — Sun, 06 Apr 2014 23:06:01 GMT

Well, there IS a setter for ExpressionFactory on ExpressionManager - the problem is that you can't avoid initialisation of the default one.

Re: Running Activiti in Google App Engine

jbarrez — Tue, 22 Apr 2014 08:42:19 GMT

@ekolesnikov: accepted. Thanks!

Re: Running Activiti in Google App Engine

hellokk78 — Sun, 02 Nov 2014 05:26:39 GMT

Hi,
   I have written the code like this
public class CustomExpressionManager extends ExpressionManager {

   public CustomExpressionManager() {
    this(new HashMap(),false);

   }

   public CustomExpressionManager(Map<Object, Object> beans, boolean initFactory) {
    this.beans = beans;
      if(initFactory) {
       // Use the ExpressionFactoryImpl in activiti build in version of juel, with parametrised method expressions enabled
       Profile profile = null;
       Properties properties = new Properties();
       expressionFactory = new ExpressionFactoryImpl(profile,properties);
      }
   }

}
and set in spring configuration file as below
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">

<property name="ExpressionManager" ref="expressionManager" />

</bean>

<bean id="expressionManager" class="com.activiti.load.CustomExpressionManager"/

Getting below error when tried to execute in Google app engine
Caused by: java.security.AccessControlException: access denied ("java.io.FilePermission" "C:\Program Files\Java\jdk1.7.0_67\jre\lib\el.properties" "read")

Can you please help on this

Thanks and Regards
Kiran

Re: Running Activiti in Google App Engine

jbarrez — Mon, 03 Nov 2014 10:52:54 GMT

Seems to be related to google app engine restrictions. Some Googling gave me this : http://stackoverflow.com/questions/12393589/jersey-linking-support-with-google-app-engine-issue. Seems to be related to Juel versions…

Re: Running Activiti in Google App Engine

zedidas — Tue, 27 Jan 2015 11:52:59 GMT

Hi,

I am very interested in deploying activiti in Google Apps Engine. But it seems there isn't a step by step tutorial on how to achieve this deployment. I've tried to checkout the source code and build it in a Google Apps Engine project but without success. I have no clue where to start.

Would you please explain how you've set up the Google App Engine project so that you can deploy activiti? What kind of adjustments did you have to do in order for this to work.

I would really appreciate your help!

Thanks!