Getting a specific process instance

[rexth]

Hello all.

Reading jBPM documentation, it seems that the are two ways to obtain a process instance.

The first one is by its ID.

The second one is by checking the value of one of its variable, cycling the whole list of the instances for a process definition.


Are there others methods?


In fact, in the first case, I must save the instance ID with the business object mapped by the process.

In the second case, if the list is very long, I can have problems with performance.

I'd like to have a Map where I can put and get elements by a key.

Can anyone tell me something more about this issue?

Thank you in advance.

Ale.

[aguizar]

The second one is by checking the value of one of its variable, cycling the whole list of the instances for a process definition [...] if the list is very long, I can have problems with performance

.
If you write a HQL query, you can have the backend database perform the "cycling" for you in a performant manner.

I'd like to have a Map where I can put and get elements by a key.

How does this relate to obtaining a process instance? Please clarify.

[rexth]

In order to use a HQL query, I have to know how jBPM persists the variables of a process instance.
So I could ask instances for a specific business value.
I'll try to have a closer look to documentation.

For the idea of a Map...
When I ask for the process instances with the last version of a process definition, now there is a method that returns a List.

Creating a new process instance, it could be possible pass an Object as a key of the instance itself.

So when I ask for the istances, I could have a Map and get the correct instance with the key I passed before.

I don't know if there's a simple solution to do this.
I'm only beginning to approach jBMP...