jBPM4 - Process Dehydration

[djcye]

Hi,
are concepts like dehydration supported ? (to put long running process instances out of mem, inside the db)

[kukeltje]

In jBPM 4, they are by default in the DB

[djcye]

thx!

an additional noob question: the userguide explains that changes to variables have to be saved to the DB explicity.

in which cases i have to do this ?

(1) when i modify variables in an java node - inside the process ?
(2) when i modify variables in an eventlistener/handler - inside the process ?
(3) when i modify variables from outside ? (change variables over the services)

[kukeltje]

where in the userguide is that stated?

[djcye]

"jBPM doesn't have a mechanism for detecting changes automatically to variable values. So if you get e.g. a serializable collection from the process variables and add an element, then you need to set the changed variable value explicitely for the changes to be saved to the DB. "

http://docs.jboss.org/jbpm/v4.0/userguide/html_single/#variables

or did i get it wrong ?

[kukeltje]

Yep, you got it wrong.... you have to SET it, not save it. pseudocode:

HashMap <String, String> var = service.getVariable("myVar");
var.put("additionalItem", "valueOfItem");

Then the processvariable in the engine is not updated.

You have to do

service.setVariable("myVar", var)

and that is with all variables, not just collections

[djcye]

thx for support, now i see =)

i realy would like to invite you to a beer ^^

[kukeltje]

Beer? Definitely not tonight (even if you lived next door) since I still am not fully recuperated from last night.

So can I take a rain check? (where do you live?)