Hi, You can create static class with thread-safe singleton initialization of connection pool and provide public access for reference. Take pool reference in prepare method. Take connection,execute smth, give it back in execute method.
So every worker will get it's own pool. Best regards, Dmytro Dragan On Apr 3, 2015 11:47 PM, "Nathan Leung" <ncle...@gmail.com> wrote: > Do it in prepare. The topology created in main() is serialized and sent > via thrift to the nimbus. It is not possible to serialize and deserialized > things like a database connection. The config map is one way you can pass > pool configuration information though. > > On Fri, Apr 3, 2015 at 4:37 PM, Adam Mitchell < > adam.mitch...@salesforce.com> wrote: > >> Where is the best place to create a JDBC connection pool, and register it >> so that all of my bolts can access it? To borrow from the examples, would >> you do that near WordCountTopology::main() and save the pool reference in >> the Config map? That way IBolt::prepare() can use the map... >> >> Or the TopologyContext is also available in IBolt::prepare(). Would you >> put it there somehow? >> >> If you're doing database dips in your bolts, how are you managing your >> database connections? >> > >
