How/when are sagas disposed?

[Andrei Alecu]

Greetings,

Been having some success lately with MassTransit and we're almost
ready to deploy it in production for a small app of ours.

There's one thing I'm concerned about. How does a Saga get disposed of
after it is complete? I don't see what marks a Saga to be complete,
there could always be a message coming later on, so does this mean
that MassTransit keeps it in memory indefinitely?

Here's some simple code:

https://gist.github.com/8a65b2a3306fb2e02634

When/how are instances of ActionSaga disposed of?

Thanks,
Andrei

[Chris Patterson]

Well, in this case you are using the in memory saga repository. And your saga is managing its own state (vs using our state machine saga language). So removal of completed sagas really depends on whatever process you create to sweep and clear the repository of old sagas.

If you use the state machine language, you can define the states and transitions, and also specify a RemoveWhen expression that determines if the saga should be removed from the repository.

We rarely do this in production systems, however, and allow the sagas to remain in a Completed state (which is part of the state machine definition) so that they are available for audits.

Through mindful use of table partitioning this can be quite effective and highly performant.

____
Chris Patterson

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[Maor Hayoun]

I've asked myself the same question - and your reply didn't answer about its usage of sagas (without the statemachine syntax).

in his code, there is no obvious "completed" state to indicate that saga can be disposed.

so in that case, how can you indicate that your in-memory saga is done?

Thanks

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[Chris Patterson]

There is a pull request pending that demonstrates one way to do this, I'm not sure I'll bring that into the main codebase but it does provide a good example of how to do it.

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[Maor Hayoun]

thanks, i'll check it, can you provide the pull request #?

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