feat: Adds alerts about configuration mismatch of proxy target subdom…

…ain.

This is to ensure that we can quickly check the central configuration for errors on our end if the proxy URL does not match.

Also adds an alarm that generally indicates exceptions that occurred when retrieving the central configuration.

PR #529

iris-client-bff/src/main/java/iris/client_bff/config/CentralConfigurationService.java

@@ -2,6 +2,7 @@
 
 import static org.apache.commons.lang3.StringUtils.*;
 
+import iris.client_bff.core.alert.AlertService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 
@@ -30,6 +31,7 @@ public class CentralConfigurationService {
 	private final JsonRpcHttpClient epsRpcClient;
 	private final ProxyServiceProperties proxyProperties;
 	private final Environment env;
+	private final AlertService alerts;
 
 	private Configuration config;
 	private Instant lastFetch = Instant.MIN;
@@ -73,9 +75,22 @@ void checkValues() {
 		}
 
 		try {
-			if (!StringUtils.equals(proxyProperties.getTargetSubdomain(), getProxyUrl())) {
+
+			var proxyUrl = getProxyUrl();
+
+			if (!StringUtils.equals(proxyUrl, proxyProperties.getTargetSubdomain())) {
+
+				alerts.createAlertTicketAndMessage("Configuration mismatch of proxy target subdomain", String.format(
+						"""
+								The proxy target subdomain is configured different in this client (via environment variable) and in backend service (by the IRIS team)!
+
+								Client: %s
+								BS: %s
+								""",
+						proxyProperties.getTargetSubdomain(), proxyUrl));
+
 				throw new CentralConfigurationException(
-						"The proxy target subdomain is configured differend in this client (via environment variable) and in backend service (by the IRIS team)!");
+						"The proxy target subdomain is configured different in this client (via environment variable) and in backend service (by the IRIS team)!");
 			}
 		} catch (MissingCentralConfigurationException e) {
 
@@ -115,14 +130,20 @@ private Configuration fetchConfig() {
 	}
 
 	private Configuration handleException(Throwable e) {
+
 		if (ignoreConnectionErrors) {
 
 			log.debug("Ignore connection error of central connection service.");
 
 			return config;
 
 		} else {
-			throw new CentralConfigurationException("Can't fetch the central configuration from backend service!", e);
+
+			alerts.createAlertMessage("Fetch central configuration error", String.format(
+					"Can't fetch the central configuration from backend service. (Exception: %s)",
+					e.getClass().getCanonicalName()));
+
+			throw new CentralConfigurationException("Can't fetch the central configuration from backend service.", e);
 		}
 	}