Not sure if this is helpful, but there is a section about adding dependencies on controller services at the end of this wiki page:
https://cwiki.apache.org/confluence/display/NIFI/Maven+Projects+for+Custom+Processors On Monday, August 10, 2015, Mark Payne <marka...@hotmail.com> wrote: > Brandon, > > I've seen this occur when I forgot to add a dependency on the > ssl-context-service-api-nar in my NAR's pom. > > You should have something like: > <dependency> > <groupId>org.apache.nifi</groupId> > <artifactId>ssl-context-service-api</artifactId> > <version>0.3.0-SNAPSHOT</version> > <type>nar</type> > </dependency> > > Is that by chance the issue, or is there something else going on? > > Thanks > -Mark > > ---------------------------------------- > > From: b...@jhu.edu <javascript:;> > > Date: Mon, 10 Aug 2015 19:13:50 +0000 > > Subject: Re: Help required with my custom controller service > > To: dev@nifi.apache.org <javascript:;> > > > > All, > > > > Was this ever solved / explained? I'm having a similar issue. If there's > > a simple answer that I'm missing that would be great... otherwise I might > > post an example set of NARs somewhere tomorrow. Probably the simplest > > question first is, if I want to create a custom processor that uses a > > SSLContextService, what dependencies do I need to add where (assuming > we're > > using the processor NAR archetype)? I've created an example that > compiles, > > loads in NiFi, and can be dropped on the graph. However, it can not be > > configured to use any currently existing SSLContextService, and any that > > are created have the same UUID issue described by David. Thoughts? > > > > Brandon > > > > > > > > On Tue, Jul 28, 2015 at 10:50 AM Mark Payne <marka...@hotmail.com > <javascript:;>> wrote: > > > >> Dave, > >> > >> In addition to the points that Aldrin brought up, are your CacheService > >> interface > >> and StandardCacheService classes in the same NAR? > >> > >> If they are not in the same NAR, does your NAR for StandardCacheService > >> have a Maven dependency > >> on the NAR that houses CacheService? > >> > >> Thanks > >> -Mark > >> > >> ---------------------------------------- > >>> From: aldrinp...@gmail.com <javascript:;> > >>> Date: Mon, 27 Jul 2015 23:26:58 -0400 > >>> Subject: Re: Help required with my custom controller service > >>> To: dev@nifi.apache.org <javascript:;>; davidrsm...@btinternet.com > <javascript:;> > >>> > >>> Dave, > >>> > >>> Some quick notes as I work through your setup. > >>> > >>> Did you create an entry in your > >>> NAR's org.apache.nifi.controller.ControllerService file? This would be > in > >>> src/main/resources/META-INF/services directory of your project. It > seems > >>> like this isn't likely the case, but a point that can sometimes get > >>> overlooked. > >>> > >>> Your accessing of the service property in your processor looks good. > >>> > >>> Did you accidentally override > AbstractControllerService#getIdentifier()? > >>> It seems like this could lead to the error you are seeing, but it is > hard > >>> to be sure. > >>> > >>> If you are able to share more code with us, we can provide some more > >>> pointed assistance. Have you managed to get your processor and > controller > >>> service running within the test framework [1]? If not, I would suggest > >>> doing so to cut down on iterations in debugging your problems as well > as > >>> providing a means for you to easily step through the code. > >>> > >>> [1] > >> http://nifi.apache.org/docs/nifi-docs/html/developer-guide.html#testing > >>> > >>> On Sun, Jul 26, 2015 at 4:45 PM, DAVID SMITH < > davidrsm...@btinternet.com <javascript:;> > >>> > >>> wrote: > >>> > >>>> Hi > >>>> I have been trying to write a simple Cache Controller Service that > uses > >> a > >>>> Map to hold <String, String> key/value pairs. I am using > >>>> nifi-0.1.0-incubating. I have created an Interface called CacheService > >>>> which extends ControllerService.public interface CacheService extends > >>>> ControllerService { > >>>> > >>>> I have created an implementation called StandardCacheService which is > as > >>>> follows: > >>>> public class StandardCacheService extends AbstractControllerService > >>>> implements CacheService { > >>>> I have compiled the StandardCacheService and created a nar which I > have > >>>> then put into my NiFi lib directory, my StandardCacheService > Controller > >>>> Service appears in the Controller services tab of the NiFi Flow > Settings > >>>> panel, I can edit it and enable it. Also there are no abnormal log > >> messages. > >>>> However, when I try to configure the CacheService in my test > Processor, > >>>> again I get no errors but when I cannot see my StandardCacheService. > My > >>>> processor has the following snippets to implement the Cache > >>>> Service/Controller: > >>>> public static final PropertyDescriptor CACHE_SERVICE = new > >>>> PropertyDescriptor.Builder() > >>>> .name("Cache Service") > >>>> .description("The Controller Service to use in order to obtain a > >>>> Cache Service") > >>>> .required(false) > >>>> .identifiesControllerService(CacheService.class) > >>>> .build(); > >>>> > >>>> final CacheService cache = > >>>> > >> > context.getProperty(CACHE_SERVICE).asControllerService(CacheService.class); > >>>> > >>>> > >>>> > >>>> > >>>> When configuring the processor, the 'Cache Service' drop down doesn't > >> show > >>>> a populated list showing my StandardCacheService, but it does allow me > >> to > >>>> create a new service, the resulting panel allows me to then select > >>>> StandardCacheService. When I select 'create' I get a UUID value in the > >>>> Value property of the Configure Processor panel. When I then apply > this > >>>> the processor shows a yellow triangle, when I hover over it I get the > >>>> following message: > >>>> 'Cache Service validated against <UUID> is invalid because Invalid > >>>> Controller service <UUID> is not a valid Controller service Identifier > >> or > >>>> does not reference the correct type of Controller service.' > >>>> Can you help please > >>>> Many thanksDave > >>>> > >>>> > >> > -- Sent from Gmail Mobile
