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Persistent variables in BIRT scripts [message #1006487]

Thu, 31 January 2013 08:36

donino donino
Messages: 72
Registered: July 2011

Member

Hi,

I am not sure how to use correctly vars[]: with BIRT 4.2.1, i noticed when we create a new var in the "Variables" section, if we set it with some "onCreate" script:

vars["myVar"]="myValue"

Then in a "onRender" script, vars["myVar"] will not be defined, it does not look persistent. But if we set it like this in "onCreate":

reportContext.setPersistentGlobalVariable("myVar","myValue");

This time, in a "onRender" script, vars["myVar"] is equals to "myValue".

Since it is more friendly to drag and drop "myVar" from Variables section than writing reportContext.getPersistentGlobalVariable("myVar") in a render expression, i wonder if we can rely on this behavior:

When we add a new variable in "Variables" eclipse designer section, does "setPersistentGlobalVariable" refer to this variable, or is it just a side-effect (may be a bug) which could change in a future version?

Thanks!

[Updated on: Thu, 31 January 2013 08:38]

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Re: Persistent variables in BIRT scripts [message #1006537 is a reply to message #1006487]

Thu, 31 January 2013 10:41

Michael Williams
Messages: 828
Registered: July 2009

Senior Member

I don't see the same issue recalling the vars["myVar"] if you set it like: vars["myVar"] = "myValue". Can you create a sample design showing the issue that I can run?

Regards,

Michael Williams
BIRT Exchange
Michael's BIRT Blog

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Re: Persistent variables in BIRT scripts [message #1006973 is a reply to message #1006537]

Sun, 03 February 2013 06:43

donino donino
Messages: 72
Registered: July 2011

Member

Thank for your response Michael.

mmh your are right, finally i can't reproduce this issue neither Confused

I probably drunk too much last week, sorry!

I did not find a tech-note or a post concerning these "Report Variables", can we rely on the fact they are persistent (can be used in a "render" event when they are initialized in a "run" event such onCreate)?

Thanks!

[Updated on: Sun, 03 February 2013 06:45]

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Re: Persistent variables in BIRT scripts [message #1007022 is a reply to message #1006973]

Mon, 04 February 2013 01:00

Michael Williams
Messages: 828
Registered: July 2009

Senior Member

Ha ha. That's quite alright! Yes, there should be no issues using report variables across events. Report and Page variables were introduced back in 2.5. Here is a look at the new and notable, from then.

New and Notable - BIRT 2.5

Regards,

Michael Williams
BIRT Exchange
Michael's BIRT Blog

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