topic Re: Process instances migration in Alfresco Archive

Process instances migration

penusila611621 — Wed, 02 Apr 2014 12:03:36 GMT

Is there any way in Activit to migrate in flight instances onto newer version of process definition.

Re: Process instances migration

martin_grofcik — Thu, 03 Apr 2014 06:45:10 GMT

Hi.

There is SetProcessDefinitionVersionCmd.
In general there is no automatic way how to upgrade running process instances to newer process definition. In the case of need you can do that manually.

Regards
Martin.

Re: Process instances migration

penusila611621 — Thu, 03 Apr 2014 07:27:24 GMT

Would you please elobarate how to use this command. Since I am very new to activiti.

Re: Process instances migration

penusila611621 — Fri, 04 Apr 2014 05:04:17 GMT

Also..i am using moduler and not eclipse plug in. please let me know how to use above command

Re: Process instances migration

martin_grofcik — Fri, 04 Apr 2014 06:31:23 GMT

Hi,
This question is not new. Try to read following threads:
http://forums.activiti.org/search/node/SetProcessDefinitionVersionCmd

It can help to understand How/Why/Why not…. .
Regards
Martin

Re: Process instances migration

penusila611621 — Mon, 07 Apr 2014 04:25:02 GMT

After going thorugh the threads the link lead you posed. I have written a java class as below to test instances migration.

package com.mindtree.cps.common;

import org.activiti.engine.ActivitiException;
import org.activiti.engine.impl.cmd.SetProcessDefinitionVersionCmd;
import org.activiti.engine.impl.interceptor.CommandExecutor;
import org.activiti.engine.impl.test.PluggableActivitiTestCase;

public class MigrateInstances extends PluggableActivitiTestCase{

   public void testSetProcessDefinitionVersionNonExistingPI() {

      System.out.print("About to get command executor object");

      try {
       CommandExecutor commandExecutor = processEngineConfiguration.getCommandExecutor();
       if(commandExecutor != null){

        commandExecutor.execute(new SetProcessDefinitionVersionCmd("14811", 14816)); //23 is a random number
        System.out.println("————- object commandExecutor is not null ————-");

       }
       else System.out.println("————- object commandExecutor is null ————-");

       //fail("ActivitiException expected");

      } catch (ActivitiException ae) {

        //assertTextPresent("No process instance found for id = '42'.", ae.getMessage());
        System.out.println("————- Exception thrown ————-" + ae.getLocalizedMessage());

      }
    }
}

When I try to test this class, I am getting the errors as attched.Am I missing something here. Since I am new to activiti not able to trace reason behind this error.

Re: Process instances migration

martin_grofcik — Mon, 07 Apr 2014 05:51:04 GMT

Hi,

Do you use jUnit test in war deployment?
Use jUnit tests outside of you web application for testing purposes. They are usually not part of production code.

Regards
Martin

Re: Process instances migration

penusila611621 — Mon, 07 Apr 2014 06:00:47 GMT

I am not using JUnit test. Any help how to use JUnit test case. No clue on out side war deployment. I am using JBOSS server and Activiti modeler and not eclipse plugin. I do not want to use eclise plugin since modeler us quite easy for me since I am IBM BPM backgroud.

Re: Process instances migration

penusila611621 — Mon, 14 Apr 2014 04:17:02 GMT

Hi Martin,

Let me know how to found Junit test suit present inside war deployment, if so how to remove them.

Re: Process instances migration

martin_grofcik — Mon, 14 Apr 2014 06:26:48 GMT

I think it is not good practice to use jUnit test inside war.
I would propose to make this special DB changes outside of war. (simple program with command line interface)

Re: Process instances migration

penusila611621 — Tue, 15 Apr 2014 04:40:59 GMT

Hi Martin,

Would you please provide me the sample migration process which can be run in modeler.

Re: Process instances migration

martin_grofcik — Tue, 15 Apr 2014 07:02:59 GMT

Hi,

Modeler does not provide this functionality. Modeler models process definitions. I thought your process upgrade question was "How to upgrade process definition in the running process instance?"

Regards
Martin

Re: Process instances migration

penusila611621 — Wed, 16 Apr 2014 05:57:54 GMT

HI Martin,

My requriement is how to migrate in flight instances of running for process def (Ex: A) onto newer version of same process definition.

Re: Process instances migration

martin_grofcik — Wed, 16 Apr 2014 06:09:45 GMT

Hi.

code snippet from activiti sources:


    // start process instance
    ProcessInstance pi = runtimeService.startProcessInstanceByKey("receiveTask");

    // check that receive task has been reached
    Execution execution = runtimeService.createExecutionQuery()
      .processInstanceId(pi.getId())
      .activityId("waitState1")
      .singleResult();
    assertNotNull(execution);
    
    // deploy new version of the process definition
    org.activiti.engine.repository.Deployment deployment = repositoryService
      .createDeployment()
      .addClasspathResource(TEST_PROCESS)
      .deploy();
    assertEquals(2, repositoryService.createProcessDefinitionQuery().count());

    // migrate process instance to new process definition version
    CommandExecutor commandExecutor = processEngineConfiguration.getCommandExecutor();
    commandExecutor.execute(new SetProcessDefinitionVersionCmd(pi.getId(), 2));

    // signal process instance
    runtimeService.signal(execution.getId());

    // check that the instance now uses the new process definition version
    ProcessDefinition newProcessDefinition = repositoryService
      .createProcessDefinitionQuery()
      .processDefinitionVersion(2)
      .singleResult();
    pi = runtimeService
      .createProcessInstanceQuery()
      .processInstanceId(pi.getId())
      .singleResult();
    assertEquals(newProcessDefinition.getId(), pi.getProcessDefinitionId());
    
    // check history
    if (processEngineConfiguration.getHistoryLevel().isAtLeast(HistoryLevel.ACTIVITY)) {
      HistoricProcessInstance historicPI = historyService
        .createHistoricProcessInstanceQuery()
        .processInstanceId(pi.getId())
        .singleResult();
      assertEquals(newProcessDefinition.getId(), historicPI.getProcessDefinitionId());
    }

    // undeploy "manually" deployed process definition
    repositoryService.deleteDeployment(deployment.getId(), true);

Regards
Martin

Re: Process instances migration

penusila611621 — Wed, 16 Apr 2014 06:49:15 GMT

Great & Many thanks Martin.

Re: Process instances migration

jperez11 — Sat, 05 Nov 2016 12:25:38 GMT

Hello Martin,

Is it possible to invoke SetProcessDefinitionVersionCmd from inside an event? I've been trying, but I'm affraid is not possible because the new deployment has not been created yet. Thanks.

Kind regards,
Jonathan.