Hi Manuranga,
For existing tasks you can use a "onMessage boundary event listener" as
Amal suggested. For tasks that will be created in the future, you can
modify the workflow such that, it will check a variable to check the
assignee on vacation or not and then change the assignee inside a service
task.

Regards,
Vinod


On Tue, Apr 26, 2016 at 1:10 AM, Manuranga Perera <[email protected]> wrote:

> yes it is possible to get an event, but the issue is this should apply to
> both existing tasks and tasks that will be created in the future.
>
> On Thu, Apr 21, 2016 at 3:16 PM, Amal Gunatilake <[email protected]> wrote:
>
>> Hi Manuranga,
>>
>> Is it possible to get a notification from the system to BPS side when the
>> user goes on vacation? If so we can have an onMessage boundary event
>> listener to trigger the BPMN process to reassign the task.
>>
>> Best regards,
>> Amal.
>>
>> On Fri, Apr 22, 2016 at 12:12 AM, Manuranga Perera <[email protected]> wrote:
>>
>>> Hi Amal,
>>>
>>>
>>>> When the main user fails to complete the task within the deadline, the
>>>> timer boundary event will trigger the Java service task. Then within the
>>>> Java service task, we can dynamically assign the task to next user by
>>>> reading the list of candidate users saved inside the process variable.
>>>
>>>
>>> The requirement is not to do it by time, (as the user store in the first
>>> mail) tasks has to be made claimable to the other user at the time task
>>> starts, if the user is on vacation. So we have to listen to some task start
>>> event.
>>>
>>>
>>> On Thu, Apr 21, 2016 at 11:06 AM, Amal Gunatilake <[email protected]>
>>> wrote:
>>>
>>>> Yes, according to the updates we cannot use the candidateGroups
>>>> attribute because it results in showing the task to every other user in the
>>>> role. (And not possible when users are in different roles)
>>>>
>>>> Therefore, as an alternative, we can have the main user put in assignee
>>>> attribute and rest of the candidate users in a variable within the process
>>>> stored as a list. This will prevent the task visibility to other candidate
>>>> users.
>>>>
>>>> When the main user fails to complete the task within the deadline, the
>>>> timer boundary event will trigger the Java service task. Then within the
>>>> Java service task, we can dynamically assign the task to next user by
>>>> reading the list of candidate users saved inside the process variable.
>>>>
>>>> Best regards,
>>>> Amal.
>>>>
>>>> On Thu, Apr 21, 2016 at 8:22 PM, Manuranga Perera <[email protected]>
>>>> wrote:
>>>>
>>>>> BTW, I have found a bit old discussion [1] on activity site. I am
>>>>> looking to that options as well.
>>>>>
>>>>> [1] https://forums.activiti.org/content/dynamic-assignment
>>>>>
>>>>> On Thu, Apr 21, 2016 at 10:49 AM, Manuranga Perera <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Hi Amal,
>>>>>> Thanks for the suggestion.
>>>>>>
>>>>>> I have also considered that option. But I thought it had the
>>>>>> following limitations:
>>>>>>   * When users are in different roles. Eg: "product lead" should take
>>>>>> over when "team lead" is on vacation. But by default  "team lead" 
>>>>>> shouldn't
>>>>>> see all the tasks for "product lead"
>>>>>>   * Works when we want to specify 'candidateGroups' , but not when we
>>>>>> need to specify 'assignee'
>>>>>>
>>>>>> May be these limitations are fine for the current use-case. I am also
>>>>>> still gathering requirements. I'll keep this as the preferred option. 
>>>>>> Just
>>>>>> wanted to see what are the other options.
>>>>>>
>>>>>> On Thu, Apr 21, 2016 at 10:29 AM, Amal Gunatilake <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Manuranga,
>>>>>>>
>>>>>>> What you have suggested is also possible. On the other hand, I have
>>>>>>> another suggestion.
>>>>>>>
>>>>>>> When we assign user1 and user2 to the same role and then we define
>>>>>>> only candidateGroups attribute to user task element, the tasks become
>>>>>>> available to both users and who ever available can claim them and 
>>>>>>> continue.
>>>>>>> Also, we can have a timer boundary event to define a deadline and if the
>>>>>>> first user fails to complete it on time then we could trigger a Java
>>>>>>> service task that reassigns the task to next available user in the 
>>>>>>> group.
>>>>>>>
>>>>>>> The above suggestion was given based on the details given in the
>>>>>>> thread, not sure whether it best suits to all requirements. We can 
>>>>>>> revisit
>>>>>>> the scenario when there are more additional details. :)
>>>>>>>
>>>>>>> Best regards,
>>>>>>> Amal.
>>>>>>>
>>>>>>> On Thu, Apr 21, 2016 at 7:16 PM, Manuranga Perera <[email protected]>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> I have the following requirement:
>>>>>>>>
>>>>>>>>     * By default the given process's instance is claimable by user1
>>>>>>>>     * But when user1 is on vacation (we have this data in a DB) we
>>>>>>>> want user2 to be able to claim it
>>>>>>>>
>>>>>>>> I can think of two ways:
>>>>>>>>
>>>>>>>>     1. Create a temporary role and keep switching user1 and user2
>>>>>>>> in and out that role
>>>>>>>>     2. Keep monitoring all claimable tasks and make it claimable to
>>>>>>>> user2 if user1 is not there
>>>>>>>>
>>>>>>>> Is there a better way (eg: specify this requirement directly in
>>>>>>>> BPMN). If not which is the better option?
>>>>>>>>
>>>>>>>> --
>>>>>>>> With regards,
>>>>>>>> *Manu*ranga Perera.
>>>>>>>>
>>>>>>>> phone : 071 7 70 20 50
>>>>>>>> mail : [email protected]
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> *Amal Gunatilake*
>>>>>>> Software Engineer
>>>>>>> WSO2 Inc.; http://wso2.com
>>>>>>> lean.enterprise.middleware
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> With regards,
>>>>>> *Manu*ranga Perera.
>>>>>>
>>>>>> phone : 071 7 70 20 50
>>>>>> mail : [email protected]
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> With regards,
>>>>> *Manu*ranga Perera.
>>>>>
>>>>> phone : 071 7 70 20 50
>>>>> mail : [email protected]
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> *Amal Gunatilake*
>>>> Software Engineer
>>>> WSO2 Inc.; http://wso2.com
>>>> lean.enterprise.middleware
>>>>
>>>
>>>
>>>
>>> --
>>> With regards,
>>> *Manu*ranga Perera.
>>>
>>> phone : 071 7 70 20 50
>>> mail : [email protected]
>>>
>>
>>
>>
>> --
>> *Amal Gunatilake*
>> Software Engineer
>> WSO2 Inc.; http://wso2.com
>> lean.enterprise.middleware
>>
>
>
>
> --
> With regards,
> *Manu*ranga Perera.
>
> phone : 071 7 70 20 50
> mail : [email protected]
>
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>


-- 
Vinod Kavinda
Software Engineer
*WSO2 Inc. - lean . enterprise . middleware <http://www.wso2.com>.*
Mobile : +94 (0) 712 415544
Blog : http://soatechflicks.blogspot.com/
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