And I'm back. So, I had my processor running, no errors, so things were good.
I then add 2 if statements with logger messages, run the same mvn command, copied the new NAR on top of the old one, same versionId and all, and now I get a class not found error, that didn't occur before I stopped, redeployed and started. And I can't delete the event in the queue even though source and destination are stopped. Is there problems when redeploying a custom processor NAR on top of itself? Even if the NiFi instance is stopped? Serialization issues? Frustratedly yours, John McGinn -------------------------------------------- On Tue, 10/16/18, John McGinn <figgie...@sbcglobal.net> wrote: Subject: Re: Compiling custom processor To: dev@nifi.apache.org Date: Tuesday, October 16, 2018, 1:21 PM Thanks Bryan, I restarted with a fresh maven generate, and only added the API to the processor pom, and then the API-NAR to the NAR pom. I then figured out a subsequent dependency (lang3), and got that in, and now my processor shows up in local NiFi instance. Regarding the copying of the standard processor, when I copied Wait over, I renamed it from Wait to MyProcessorWait to be unique, and not copied. I'm just attempting changes to Wait without modifying the actual one. Also, thanks on the META-INF/services file information. Now I can debug and test. Sincerely, John McGinn -------------------------------------------- On Tue, 10/16/18, Bryan Bende <bbe...@gmail.com> wrote: Subject: Re: Compiling custom processor To: dev@nifi.apache.org Date: Tuesday, October 16, 2018, 9:52 AM In general, if your processor uses a controller service then the processors pom file needs a provided dependency on the API of the CS, and your NAR pom needs a NAR dependency on the NAR where the CS API is. Example is shown here in the section linking processors and controller services - https://cwiki.apache.org/confluence/display/NIFI/Maven+Projects+for+Extensions Also, you do not want to include NiFI's standard processors in your own NAR, this will result in two copies of every standard processor. You will want to copy whatever code you need into your own NAR. In you last statement, if you made a new processor in nifi-standard-processors and it didn't show up, it is most likely because you didn't update META-INF/services file to include the new processor. On Tue, Oct 16, 2018 at 9:36 AM John McGinn <amruginn-n...@yahoo.com.invalid> wrote: > > Ok, I am far from a maven expert, and am struggling on this problem. > > I created a new project using the maven generate process, and compiled that sample processor and everything was fine, and I could see it in my local NiFi instance. I then copied over the Wait processor on top of the MyProcessor.java class, changed the package name, and the class name, and attempted to compile. Got errors due to dependency issues. This is where I get confused. > > In the processor directory, I modify the pom.xml with a dependency line for nifi-api, nifi-utils, nifi-distribute-cache-client-service-api and nifi-standard-processors. This seemed to make things work, and I get a 33 meg NAR file, which contains lots of JARs. I load that up, and I get a problem with CalculateStats, or similar, because of RecordReaderFactory. I go back in and include nifi-record-serialization-services, and it compiles, and the JAR is included in the NAR file now, and I still get class not found. > > I've also tried to change the dependencies to a status of provided, and therefore get a minimal 25k or so NAR file with no JARs included. I get the same issue with the class not found. > > I had also attempted to copy Wait.java to AnotherWait.java within the actually NiFi source code, and it compiles, and shows up in the JARs and NARs as I'd expect, but I cannot get to it within my NiFi instance. > > Can someone let me know what I'm doing wrong. > > Thanks, > John McGinn
