@Component
public class ExternalServiceHealthIndicator implements HealthIndicator {
    @Override
    public Health health() {
        boolean isRunning = checkServiceStatus();
        if (!isRunning) {
            return Health.down()
                         .withDetail("Service", "Not Reachable")
                         .build();
        }
        return Health.up().withDetail("Service", "Online").build();
    }
 
    private boolean checkServiceStatus() {
        // Logic to ping external service
        return true;
    }
}