Thanks Andy, I've tried your approach, in my case the controller service is
a DBCPConnectionPool and when I tried to get driver class name property
through context.getProperty(DBCPConnectionPool.DB_DRIVERNAME).getValue(),
but I the value is null. The AbstractControllerService class does have a
method getConfigurationContext() to get configuration context, but the
method is protected. So I still didn't find a feasible way to get the
controller service's properties.
Regards,
Ben
2017-08-10 12:18 GMT+08:00 Andy LoPresto <alopre...@apache.org>:
> You can get the current property values of a controller service from the
> processor by using the ProcessContext object. For example, in GetHTTP [1],
> in the @OnScheduled method, you could do:
>
> context.getControllerServiceLookup().getControllerService("my-
> controller-service-id”);
>
> context.getProperty("controller-service-property-name");
> context.getProperty(SomeControllerService.CONSTANT_PROPERTY_DESCRIPTOR);
>
> I forget if context.getProperty() will give the controller service
> properties as well as the processor properties. If it doesn’t, you can cast
> the retrieved ControllerService into AbstractControllerService or the
> concrete class and access available properties directly from the
> encapsulated ConfigurationContext.
>
> [1] https://github.com/apache/nifi/blob/master/nifi-nar-
> bundles/nifi-standard-bundle/nifi-standard-processors/src/
> main/java/org/apache/nifi/processors/standard/GetHTTP.java#L295
>
> Andy LoPresto
> alopre...@apache.org
> *alopresto.apa...@gmail.com <alopresto.apa...@gmail.com>*
> PGP Fingerprint: 70EC B3E5 98A6 5A3F D3C4 BACE 3C6E F65B 2F7D EF69
>
> On Aug 9, 2017, at 6:57 PM, 尹文才 <batman...@gmail.com> wrote:
>
> Thanks Koji, I checked the link you provided and I think getting a
> DataSource is no different than getting the DBCP service(they could just
> get the connection). Actually I was trying to get the configured driver
> class to check the database type.
>
> Regards,
> Ben
>
> 2017-08-10 9:29 GMT+08:00 Koji Kawamura <ijokaruma...@gmail.com>:
>
> Hi Ben,
>
> I'm not aware of ways to obtain configurations of a controller from a
> processor. Those should be encapsulated inside a controller service.
> If you'd like to create DataSource instance instead of just obtaining
> a connection, this discussion might be helpful:
> https://github.com/apache/nifi/pull/1417
>
> Although I would not recommend, if you really need to obtain all
> configurations, you can do so by calling NiFi REST API from your
> processor.
>
> Thanks,
> Koji
>
> On Thu, Aug 10, 2017 at 10:09 AM, 尹文才 <batman...@gmail.com> wrote:
>
> Hi guys, I have a customized processor with a DBCP controller service as
>
> a
>
> property. I could get the DBCP controller service in my code, but does
> anyone know how to obtain all the configurations of the DBCP controller
> service in java code(e.g. Database Connection URL, Database Driver
> Location, etc) Thanks.
>
> Regards,
> Ben
>
>
>
>
