Report and Thread

rbuser

Hi,
I'm writing an application where a client submit a request about a report
and a server, that work as a service, launch a thread (max 5) to generate a
report required in background mode.
If the application launch only one thread the report generated is ok, but if
more than one thread was launched no one report result ok.

I think that the components are not thread-safe is true ?
Is possible to solve this problem ?

Thanks a lot.
Mauro.

nardmoseley

ReportBuilder 7 was the first version to be thread-safe and introduced RB
Server Edition.

RB 7 also introduced the ability to print in a background thread.

You must provide a thread environment for the report to execute. Access the
TppReport help topic and then navigate to the BackgroundPrintSettings
property topic. It contains a good discussion about providing thread-safe
data access and a thread safe container for the report.



--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com

rbuser

Hi,
In my application all components as TSession, TQuery, TDataSource,
TppDBPipeline, TPPReport are created during the runtime and in the Thread
unit but when I use BackgroundPrintSetting an error appear :
"TppBackgroundPrintRequest.Create: Owner of producer cannot be nil for
background printing."
I don't understand what can be produce this error.

Thanks a lot.

nardmoseley

A form/datamodule should be used to provide a thread-safe container. Use a
datamodule is possible. The form/datamodule should be the Owner of the
report, datapipeline, and data access components.


--
Nard Moseley
Digital Metaphors Corporation
http://www.digital-metaphors.com