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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