Matt/Stanislav, As part of NIFI-3093 (HIVE support for QueryDatabaseTable) I had planned to move DatabaseAdapter to the DBCP Service Controller project; whether or not that makes sense I have no idea, and I haven't done it at this time. But I wanted to be able to rehome the new HIVE DatabaseAdapter to the HIVE NAR and this looked like a candidate project.
Stanislav, it sounds like you are trying to avoid customizing core code (very understandable), but if you are interested I have an open PR that shows everything I had to do to add a new DatabaseAdapter for MS SQL Server as part of the existing structure.: https://github.com/apache/nifi/pull/1510. Thanks, Peter -----Original Message----- From: Matt Burgess [mailto:[email protected]] Sent: Friday, February 17, 2017 7:53 PM To: [email protected] Subject: Re: Creating a custom DatabaseAdapter Stanislav, This is not your fault, it is a current limitation due to the organization of the NiFi submodules with respect to the location of DatabaseAdapter. In general, when a NiFi interface is to be extensible, there is a submodule for the API JAR to be available to other NARs/submodules/etc. In this case, we'd likely want DatabaseAdapter (and any related classes) to be included in nifi-standard-services-api-nar as its own API NAR, yet at the moment it is a class inside nifi-standard-nar. I agree that we should make this interface available, and refactor the submodules accordingly to make DatabaseAdapter extensible outside the nifi-standard NAR. Some care should be given to which "parent NAR" it belongs, in order to ensure that we don't upset the current mechanism of one parent NAR per child NAR, but hopefully "nifi-services-api-nar" is the right spot. Do you mind writing up a Jira case for this? I think it will help the community in general as various DB integrations are desired. Thanks in advance, Matt On Fri, Feb 17, 2017 at 5:05 AM, Stanislav <[email protected]> wrote: > Hi, > > I would like to create a custom > org.apache.nifi.processors.standard.db.DatabaseAdapter, is this possible? > I have tried creating new class that implements the interface and specified > the full class name in > META-INF\services\org.apache.nifi.processors.standard.db.DatabaseAdapter > file, and created a nar. > But this does not appear to be working, the custom processor i have in that > nar are picked-up but the DatabaseAdapter isn`t. > Any tips on how to make it work? > > Best regards, > Stanislav.
