Dan,
Thanks for looking into this. Apologies for not responding promptly, somehow I
managed to miss your response. I do use
BackgroundCommandExecutionFromBackgroundCommandServiceJdo in my Quartz job to
run background commands, but the problem arises before that class gets into the
picture, i.e. during the time when CommandJdo is being flushed into the
database, which happens in an ordinary Quartz job without any command context.
The test app which I have uploaded simlulates this using a simple background
thread.
-- Best regards, Igor Lobanov
On Monday, 11 April 2016, 20:28, Dan Haywood
<[email protected]> wrote:
Hi Igor,
just looking into this now and reminding myself of what the design was...
... did you look into using BackgroundCommandExecution, rather than
AbstractIsisSessionTemplate (of which it is a subclass?) This will
initialize the parent command for you, I think.
The BackgroundCommandExecutionFromBackgroundCommandServiceJdo in turn is a
concrete implementation which you could have Quartz call every 30 seconds
or so. There's actually an example QuartzJob at [1]
HTH
Dan
[1]
https://isis.apache.org/guides/rgsvc.html#_rgsvc_api_BackgroundService_BackgroundCommandExecution
On 9 April 2016 at 18:46, Dan Haywood <[email protected]> wrote:
> Thanks Igor,
>
> I'll do my best to take a look tomorrow.
>
> Dan
>
>
> On 9 April 2016 at 18:45, Igor Lobanov <[email protected]> wrote:
>
>> I've created simple project demonstrating the behaviour:
>> https://github.com/lobanov/apache-isis-bug1
>>
>> README.md provides a sequence of steps required to reproduce the
>> behaviour, hopefully it is clear enough.
>>
>> -- Best regards, Igor Lobanov
>>
>>
>> On Saturday, 9 April 2016, 16:21, Dan Haywood <
>> [email protected]> wrote:
>>
>>
>>
>> Just use the simpleapp archetype and add in the minimal amount of stuff
>> needed to demonstrate the issue.
>> Thx,
>> Dan
>> On 9 Apr 2016 16:05, "Igor Lobanov" <[email protected]>
>> wrote:
>>
>> Sure, although I need an advice on how to best approach it. Is there an
>> easy way of bootstrapping Isis as a standalone app using HSQL or something
>> similar?
>> -- Best regards, Igor Lobanov
>>
>> On Saturday, 9 April 2016, 15:33, Dan Haywood <
>> [email protected]> wrote:
>>
>>
>>
>> That does sound like an issue. Probably the issue is in the addons
>> implementation rather than in Isis "proper", so will a bit easier to
>> release a fix if that is a problem.
>>
>> Could you put together a simple example on github that demonstrates the
>> problem, and document on its README how to reproduce?
>>
>> Thx,
>> Dan.
>> On 9 Apr 2016 15:28, "Igor Lobanov" <[email protected]>
>> wrote:
>>
>> All,
>> I am running business logic in background using Quartz. To that end I am
>> extending AbstractIsisSessionTemplate in my job classes and overriding
>> doExecuteWithTransaction() to do something useful, so far so good. Now I
>> need to schedule some actions to be executed in the background outside the
>> main scheduled job. This is because spawned tasks themselves may fail, but
>> it must not cause the main job to fail as well.
>> The project makes use of isis-module-command addon to schedule background
>> commands from the UI, so I went on and wrote a logic that calls
>> BackgroundService#execute(...) in the job code. Apparently this doesn't
>> work, as I'm getting a few 'cannot insert null into non-null column' when
>> CommandJdo INSERTs are being flushed. It is difficult for me to work out
>> what the problem is by reading the code, but it seems that
>> BackgroundService#execute(...) assumes invocation from the context of
>> another parent command, which apparently is not so when the code is
>> running
>> in a background thread.
>>
>> Ideally, I want to make use of BackgroundService#execute(...) rather than
>> building something custom. Is there a particular way to invoke it from a
>> background thread aside from
>> AbstractIsisSessionTemplate#doExecuteWithTransaction()? Do I need to
>> 'spoof' a parent command somehow? I would appreciate any suggestion.
>> -- Best regards, Igor Lobanov
>>
>>
>>
>>
>>
>>
>>
>>
>
