On 10/02/2012 03:36, Apache wrote:
Hey,
I am trying to get multiple threads to insert events and run rules against the union of
events inserted ( an as soon as they are inserted, a timer drools thread kicking of
fireallrules() is not an option because that would introduce a delay ) and wanted some
opinion on the following:
1. Stateless session is basically a wrapper around statefulsession and since per doc
statefulsession is not threadsafe is it safe to assume 2 threads cannot insert and run
fireallrules to compare against a union of objects inserted by multiple threads without
some synchronication on event insertion and ESP fireallrulesrules ? ( would the answer
still hold despite a drools-camel endpoint reading and storing exchanges from multiple
threads ? )
stateful sessions are thread safe, they just aren't multi-threaded.
Each
of the working memory actions hold a lock, so only one thread at a time
can enter.
2. If in the above point we simplify the case where the rule uses the "from"
keyword and reads from a cache or a Db ( is reading from
A cache supported out of the box ? ) then will drools bhaviour will be bound by the
thread which invokes fireallrules() ?
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