Hi Roberto, Do you mean something like the proposed change at https://issues.apache.org/jira/browse/FLUME-2993 ? Would that fit your requirements?
Thank you, Donat On Dec 1, 2016 7:33 PM, "Shang Wu (CS)" <shang...@symantec.com> wrote: > Hi Robert, > > Looks like what you want is more like a global configuration, and based on > my limited knowledge in Apache Flume, it is missing now. > > BR, > > Shang > > *From: *Roberto Coluccio <roberto.coluc...@eng.it> > *Reply-To: *"user@flume.apache.org" <user@flume.apache.org> > *Date: *Thursday, December 1, 2016 at 2:59 AM > *To: *"user@flume.apache.org" <user@flume.apache.org> > *Subject: *Re: Define and leverage custom constants in agent configuration > > > > Hi Silvio, > > thanks for your suggestion. It gives me a workaround, but it's not exactly > what I was hoping/asking about. > > I'm going to assume what I'd want to do being just not doable. > > Thank you, > > Roberto > > > > On 29/11/2016 09:26, Silvio Di gregorio wrote: > > with the "static interceptor" you can add key/value pairs in your flume > event header: > > > > agentOne.sources.s1.interceptors = interOne > > agentOne.sources.s1.interceptors.interOne.type = static > > agentOne.sources.s1.interceptors.interOne.key = costante > > agentOne.sources.s1.interceptors.interOne.value = quello_che_vuoi > > > > I hope it is useful > > have nice day > > Silvio > > > > 2016-11-28 18:26 GMT+01:00 Roberto Coluccio <roberto.coluc...@eng.it>: > > Hello folks, > > I was wondering if it's possible to define custom constants in a Flume > agent configuration file, so to avoid errors and replicated stuff when not > needed. An example to make my point clear: > > assume I want to launch an agent of type *myAgent* configured with file > channel and hdfs sink. > > I want the file channel to persist data and checkpoint into > "~/flume/myAgent1/data" and "~/flume/myAgent1/checkpoint" > > Also, I want the hdfs sink to write files with prefix "myAgent1" > > In this scenario, I should harcorde the "myAgent1" string 3 times, one for > each configuration parameter. This is error prone and kinda frustrating. > > Is there a way to define a constant like "myConstant" in the configuration > file, and leverage it as parameter in the other configuration lines? > > e.g. > > myConstant = myAgent1 > myAgent.channels.myChannel.dataDirs = ~/flume/${myConstant}/data > myAgent.sinks.mySink.hdfs.filePrefix = ${myConstant} > > It seems like the use of flume events header keys, but I don't want to add > interceptors or other components just to have parameters in my config file. > > Thanks for your help. > > Best regards, > > Roberto > > > > > > -- > > > > > > > > > > *Roberto Coluccio* > > Solution Designer > Direzione Ricerca e Innovazione > roberto.coluc...@eng.it > > Interno 604135 | Esterno +39 0510435135 <+39%20051%20043%205135> > > > > *Engineering Ingegneria Informatica spa* > Via Marconi, 10, 40122 Bologna > > www.eng.it > > >