No, not this way.
If you process the same bulk in two separate
actions of a asynchronous workflow you are working on two
separate record instances, so everything should be fine.
The synchronization stuff is about writing to
the same record in two pipelet invocations in the same BPEL
workflow that are executed in parallel which could happen
when using the BPEL <flow> activity. Then both
pipelets would be working on the same record instance on the
same blackboard. It could be necessary then to put write
accesses to the records in your pipelet in a synchronized
block, like
Record record = blackboard.getRecord(id);
synchronized (record) {
record.getMetadata().put(attribute, value);
}
But as we never tried this before I’m not quite
sure about this myself.
Cheers,
Jürgen.
Grazie Jürgen.
You tell me that if I need to access to the same bulk in two
sub-pipelines I need to create my own version of Record
Implementation ad blackboard to introduce synchronization
access to th record "attributes"?
Those objects in SMILA are not synchronized yet or that is
what you want to do?
Thanks a lot, Lorenzo
Il 08/12/2011 8.50, Jürgen Schumacher ha scritto:
Buon giorno,
Yes, that should be possible using the BPEL <flow>
activity, something like:
<flow>
<sequence>
… pipelets for HTML processing …
</sequence>
<sequence>
… pipelets for video processing …
</sequence>
</flow>
However, we did not yet try this out. But
parallel processing in <forEach> activities works, so
I assume that this should work, too.
Of course, you should not manipulate the same
attributes in both sequences. It may even be necessary to do
some synchronization of record write accesses, as the
AnyMap implementation is just based on simple unsynced
HashMaps.
Regards,
Jürgen.
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