Newly created / extended JHipster endpoint does not work (404 error) - spring

Question

I want to create a new endpoint that extends the existing jhimetrics endpoint (or extend the results of the existing jhimetrics). The application is generated with JHipster.
So what I have done is:
add the new endpoint to the array in application.yml file, specifically:
management:
endpoints:
web:
base-path: /management
exposure:
include: [ ..., "health", "info", "jhimetrics", "roxhens"]
created the ExtendedMetricsEndpoint.java with the following content:
// imports, etc...
#Endpoint(id = "roxhens")
public class ExtendedMetricsEndpoint {
private final JHipsterMetricsEndpoint delegate;
private final SimpUserRegistry simpUserRegistry;
public ExtendedMetricsEndpoint(
JHipsterMetricsEndpoint delegate,
SimpUserRegistry simpUserRegistry
) {
this.delegate = delegate;
this.simpUserRegistry = simpUserRegistry;
}
#ReadOperation
public Map<String, Map> getMetrics() {
Map<String, Map> metrics = this.delegate.allMetrics();
HashMap<String, Integer> activeUsers = new HashMap<>();
activeUsers.put("activeUsers", this.simpUserRegistry.getUserCount());
metrics.put("customMetrics", new HashMap(activeUsers));
return metrics;
}
}
created the configuration file for this endpoint:
// imports etc...
#Configuration
#ConditionalOnClass(Timed.class)
#AutoConfigureAfter(JHipsterMetricsEndpointConfiguration.class)
public class ExtendedMetricsEndpointConfiguration {
#Bean
#ConditionalOnBean({JHipsterMetricsEndpoint.class, SimpUserRegistry.class})
#ConditionalOnMissingBean
#ConditionalOnAvailableEndpoint
public ExtendedMetricsEndpoint extendedMetricsEndpoint(JHipsterMetricsEndpoint jHipsterMetricsEndpoint, SimpUserRegistry simpUserRegistry) {
return new ExtendedMetricsEndpoint(jHipsterMetricsEndpoint, simpUserRegistry);
}
}
What step am I missing here, or what am I doing wrong?

Answer 1

I had the same issue and after 2 days of struggle I was able to find a solution which works for me:
#Component
#WebEndpoint(id = "xxxmetrics")
public class XXXMetricsEndpoint {
private final MeterRegistry meterRegistry;
public SrnMetricsEndpoint(MeterRegistry meterRegistry) {
this.meterRegistry = meterRegistry;
}
#ReadOperation
public Map<String, Map> allMetrics() {
Map<String, Map> stringMapMap = new LinkedHashMap<>();
return stringMapMap;
}
}
Application yml:
management:
endpoints:
web:
base-path: /management
exposure:
include: [... , 'health', 'info', 'jhimetrics', 'xxxmetrics' ,'metrics', 'logfile']
This way the request: /management/xxxmetrics works.
The spring docs: https://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-features.html#production-ready-endpoints-custom
Edit:
spring version: 5.1.10, spring-boot-actuator: 2.1.9