Thank you so much. Sent from my iPhone
> On May 15, 2015, at 8:41 PM, Nathan Leung <ncle...@gmail.com> wrote: > > 1) Bolt prepare is good > > 2) If you need to close it, it's best to deactivate the topology first, and > then on deactivation have spout broadcast a message to all bolts indicating > that shutdown is in progress > > 3) I would still just do lazy initialized singleton; that way whichever bolts > need access to the cache can check and then create the connection if > necessary. Once it's created you're good. I guess you have to check for > initialization every time you access the cache but that's cheap compared to > talking to another server. > >> On Fri, May 15, 2015 at 7:09 PM, Dzmitry Viarzhbitski >> <dzmitry.viarzhbit...@gmail.com> wrote: >> >> I have cache synchronized with other machines by TCP/IP but I don't know: >> >> 1) where to init it (in bolt prepare? Is it possible to do it for worker?) >> 2) and how to dispose it (caches uses a connection to remote http server, >> it's better to close it after all topologies will be deactivated). >> >> I thinking about creating separate init topology. Is the a normal way to >> achieve this? >> How can I guarantee that this bolt will be created on each worker node? >> >> Thank you. >> >>> On 15 May 2015 at 15:52, Nathan Leung <ncle...@gmail.com> wrote: >>> Sorry misread original email. If you need to share across topologies then >>> you should consider something like memcache. >>> >>>> On May 15, 2015 6:52 PM, wrote: >>>> Lazy initialized singleton. Let the os release the memory when you're done >>>> :). >>>> >>>>> On May 15, 2015 6:44 PM, "Dzmitry Viarzhbitski" >>>>> <dzmitry.viarzhbit...@gmail.com> wrote: >>>>> Let's I assume that I have several topologies in the same jar which are >>>>> using some cache. >>>>> I need to init cache (cache subscribed to events from different system >>>>> and can be reloade) and release cache when the worker will be switched >>>>> of. Is it possible to share static cache from multiple topologies and how >>>>> to shut down it (in case if I kill one topolgy other still use the >>>>> cache)? What should be the event release the cache (worker shutdown)? >>>>> >>>>> Thank you. >
