Mark, Thanks for your suggestions. I will do some experiments....
Cheers, Frank. On Fri, Jan 22, 2016 at 8:43 AM, Mark Payne <marka...@hotmail.com> wrote: > Frank, > > The approach that you laid out here would certainly work. However, I feel > that it may be a bit heavy-handed. If the idea is > just to reload some information from a local file, then I would recommend > that you take a look at the ScanContent / ScanAttribute > Processors. They do something similar. They are configured with a file > that is the Dictionary of Terms to route on. Then, they > periodically check if the file has been updated. If so, they will reload > the information, otherwise they will just keep what they > already have loaded. > > They make use of SynchronousFileWatcher class that exists in the > nifi-utils module, which helps to make this simpler. > > Please feel free to reach out with any additional questions, or if this > doesn't seem like the right fit for you. > > Thanks > -Mark > > On Jan 21, 2016, at 11:08 PM, Frank Martínez <mnesa...@gmail.com> wrote: > > Hi Joe, > > Thanks for your response. > > So the way is to get the instruction set from external source in onTrigger > method each time? Or is there any way to push immediate commands or > messages to the Procesor? > > Maybe I can create a custom ControllerService that provides and caches the > current instruction set, then I can create a Custom processor that updates > the cache of the ControllerService, then use GetFile to poll a directory > where I can put files (commands) to be executed. > > > > get current config > +--------------------> [config source endpoint] > | > +-------> ConfigLoaderProcessor > | | > GetFileProcessor | update config cache > | \/ > Directory ConfigControllerService > | ^ > CommandFile | > . > . get current config > | > .......> RouterProcessor .....> > > > What do you think? > > Thanks > > > On Thu, Jan 21, 2016 at 10:38 PM, Joe Witt <joe.w...@gmail.com> wrote: > >> Frank, >> >> Absolutely. Have seen several of these of various types of the years. >> It usually works best if the processor itself calls out/polls some >> endpoint to get the latest instruction set. This approach tends to >> scale better, means clustered systems work smoothly as well, and it is >> nice from a reliability perspective. You can still choose to push new >> configuration information to the processor but keep in mind you cannot >> change its properties while it is running. >> >> Feel free to fire more questions as you dig deeper into it. >> >> Thanks >> Joe >> >> On Thu, Jan 21, 2016 at 10:33 PM, Frank Martínez <mnesa...@gmail.com> >> wrote: >> > Hi Guys, >> > >> > I want to develop a custom Router processor, But I want that my >> processor >> > logic depends on external parameters than can be hot changed. So I have >> to >> > send some signals to the processor while it is running, so it will >> change >> > its internal routing logic. Is it possible to do that with apache nifi? >> > >> > Thanks, >> > >> > Frank Martínez. >> > >> > -- >> > Frank D. Martínez M. >> > > > > -- > Frank D. Martínez M. > > > -- Frank D. Martínez M.
