topic Re: Retrieving all tasks defined in a process definition via REST API in Alfresco Archive

Retrieving all tasks defined in a process definition via REST API

dvk78 — Wed, 08 Apr 2015 12:11:50 GMT

I was trying to find out if it was possible to retrieve the list of all User tasks configured in a process definition/instance via the REST API. From the user guide I could not determine if that is possible at all. Only the tasks that have been completed/current seem to be getting returned for runti

Re: Retrieving all tasks defined in a process definition via REST API

balsarori — Wed, 08 Apr 2015 19:55:35 GMT

I am not sure whether you want to retrieve task instances or task definitions (User Tasks defined in a process definition).

If you are referring to task instances, you can retrieve task instances of a specific process instance or process definition, check 15.8.12. Get historic task instances section in the Activiti User Guide
http://activiti.org/userguide/index.html

Use the processInstanceId parameter to get task instances of a specific process instance. Use the processDefinitionId parameter to get task instances of all process instances of a specific process definition. There are other parameters that you can use to filter results as needed.

If you are referring to task definitions, I don't think that is currently possible. However, you can retrieve the whole process definition (which will include all user tasks definitions) using

GET repository/process-definitions/{processDefinitionId}/model

Re: Retrieving all tasks defined in a process definition via REST API

dvk78 — Thu, 09 Apr 2015 06:05:40 GMT

Thanks for responding balsarori.
For my situation, it would be ideal if I could retrieve all the 'User Tasks' that are defined in a process definition. If that is not possible, the alternative would be to retrieve all the 'User Tasks' that could be potentially associated to the process instance as per the process definition.
I guess it would boil down to API support that would involve parsing the bpmn xml and listing all the 'User Tasks' defined in it. If that support is not there, may be it could be built for a future release?

Re: Retrieving all tasks defined in a process definition via REST API

jbarrez — Tue, 14 Apr 2015 12:06:58 GMT

> l if I could retrieve all the 'User Tasks' that are defined in a process definition

Then you need to filter on process definition (id or key)

Re: Retrieving all tasks defined in a process definition via REST API

dvk78 — Wed, 15 Apr 2015 08:44:30 GMT

I do not see any Task-related data in the REST response for a GET of a process-definition. Which API are you referring to?

Re: Retrieving all tasks defined in a process definition via REST API

balsarori — Wed, 15 Apr 2015 18:57:32 GMT

Check 15.3.5. Get a process definition BPMN model section in the user guide. Did you do a GET call to the following REST url?

repository/process-definitions/{processDefinitionId}/model

Re: Retrieving all tasks defined in a process definition via REST API

dvk78 — Thu, 16 Apr 2015 05:31:56 GMT

Thanks. This works. I had tried repository/process-definitions/{processDefinitionId} . Missed the /model at the end.

Re: Retrieving all tasks defined in a process definition via REST API

arunk — Thu, 07 Jul 2016 11:24:25 GMT

How can we identify the tasks in the list is a user task(not a gateway or mail task etc,.)

Re: Retrieving all tasks defined in a process definition via REST API

amruta_holey — Thu, 25 Aug 2016 13:37:10 GMT

I am trying to fetch all tasks having specific processDefinitionId.
This is my url:
http://localhost:8080/activiti-rest/service/runtime/tasks?size=100000&processDefinitionId=reviewSaledLead:1:40
But tasks are not getting filtered by processDefinitionId. it giving me all tasks from ACT_RU_TASK table without filteration.
How to resolve this ?

Re: Retrieving all tasks defined in a process definition via REST API

amruta_holey — Thu, 25 Aug 2016 13:58:32 GMT

It is giving correct result when I filter it by processInstanceId but giving all task records from the table when I pass processDefinitionId as a url parameter

Re: Retrieving all tasks defined in a process definition via REST API

trademak — Mon, 29 Aug 2016 07:19:17 GMT

Correct, processDefinitionId is not a supported request parameter currently.
Instead, you could use processDefinitionKey for example.

Best regards,

Re: Retrieving all tasks defined in a process definition via REST API

jbarrez — Thu, 01 Sep 2016 14:35:51 GMT

I've added processDefinitionId last week.

Re: Retrieving all tasks defined in a process definition via REST API

amruta_holey — Fri, 02 Sep 2016 08:45:27 GMT

Thanks trademak, Can you please reply me with the example how i can use processDefinitionKey as parameter.

Re: Retrieving all tasks defined in a process definition via REST API

amruta_holey — Fri, 02 Sep 2016 09:00:22 GMT

Thanks jbarrez. Till the time we get next release of Acitiviti,
is there any other alternative way to get tasks list which are defined in process definition ?

Re: Retrieving all tasks defined in a process definition via REST API

jbarrez — Fri, 02 Sep 2016 12:58:53 GMT

no, process definition key is the only way I'm afraid. But you'll get the tasks for all the version for that particular key.

Re: Retrieving all tasks defined in a process definition via REST API

nmorado — Tue, 01 Aug 2017 13:58:32 GMT

this has been a while - but i am on same boat.

getting all user tasks from BpmnModel will give you statically the universe of tasks without considering conditional workflows - is my assumption correct?

If yes - then would we get all user tasks that are only valid based on conditional workflows and existing runtime parameters to process instance?

thanks