Custom Nifi Controller properties do not appear

Fredi — Tue, 04 Apr 2023 09:35:35 GMT

Hello friends,

I wrote a custom processor and now wanted to add a custom controller. The problem is, that the properties I wrote for the controller do not appear when I create the service. I followed the structure of this controller: https://github.com/Automna/NiFi/blob/master/nifi-rel-nifi-1.1.2/nifi-nar-bundles/nifi-standard-services/nifi-dbcp-service-bundle/nifi-dbcp-service/src/main/java/org/apache/nifi/dbcp/DBCPConnectionPool.java

Here is what I did so far:

public class MyNewControllerService extends AbstractControllerService implements MyControllerService { public static final PropertyDescriptor USERNAME = new PropertyDescriptor.Builder() .name("Username") .expressionLanguageSupported(ExpressionLanguageScope.NONE) .displayName("Set username") .required(true) .defaultValue("User") .description("Username to login to graph service") .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) .build(); public static final PropertyDescriptor PASSWORD = new PropertyDescriptor.Builder(). name("Password") .expressionLanguageSupported(ExpressionLanguageScope.NONE) .displayName("Set password") .required(true) .defaultValue("password") .description("Password to login to graph service") .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) .build(); public static final PropertyDescriptor URL = new PropertyDescriptor.Builder(). name("ApiUrl") .expressionLanguageSupported(ExpressionLanguageScope.NONE) .displayName("Set url") .required(true) .defaultValue("url") .description("Full url to api") .addValidator(StandardValidators.NON_EMPTY_VALIDATOR) .build(); private static final List<PropertyDescriptor> properties; static { final List<PropertyDescriptor> props = new ArrayList<>(); props.add(USERNAME); props.add(PASSWORD); props.add(URL); properties = Collections.unmodifiableList(props); } OkHttpClient client = new OkHttpClient(); private static ObjectMapper mapper = new ObjectMapper(); @Override protected List<PropertyDescriptor> getSupportedPropertyDescriptors() { return properties; } @OnEnabled public void onConfigured(final ConfigurationContext context) throws InitializationException { final String user = context.getProperty(USERNAME).getValue(); final String password = context.getProperty(PASSWORD).getValue(); final String url = context.getProperty(URL).getValue();

What is missing that I only get a blank properties page?

Re: Custom Nifi Controller properties do not appear

Fredi — Fri, 07 Apr 2023 07:32:42 GMT

Just for everyones information; There was nothing wrong with the code. It was simply that the docker image I used to run Nifi did not build properly and therefore my modifications weren't taken into account.

question Re: Custom Nifi Controller properties do not appear in Support Questions

Custom Nifi Controller properties do not appear

Re: Custom Nifi Controller properties do not appear