feat: improve logging (#1542)

Author: metacosm

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/informer/InformerManager.java

@@ -17,6 +17,7 @@
 import io.fabric8.kubernetes.client.dsl.Resource;
 import io.fabric8.kubernetes.client.informers.ResourceEventHandler;
 import io.javaoperatorsdk.operator.OperatorException;
+import io.javaoperatorsdk.operator.ReconcilerUtils;
 import io.javaoperatorsdk.operator.api.config.Cloner;
 import io.javaoperatorsdk.operator.api.config.ConfigurationServiceProvider;
 import io.javaoperatorsdk.operator.api.config.ResourceConfiguration;
@@ -104,14 +105,15 @@ private InformerWrapper<T> createEventSource(
 
   @Override
   public void stop() {
-    for (InformerWrapper<T> source : sources.values()) {
+    log.info("Stopping {}", this);
+    sources.forEach((ns, source) -> {
       try {
-        log.info("Stopping informer {} -> {}", this, source);
+        log.debug("Stopping informer for namespace: {} -> {}", ns, source);
         source.stop();
       } catch (Exception e) {
-        log.warn("Error stopping informer {} -> {}", this, source, e);
+        log.warn("Error stopping informer for namespace: {} -> {}", ns, source, e);
       }
-    }
+    });
   }
 
   @Override
@@ -167,4 +169,14 @@ public List<T> byIndex(String indexName, String indexKey) {
     return sources.values().stream().map(s -> s.byIndex(indexName, indexKey))
         .flatMap(List::stream).collect(Collectors.toList());
   }
+
+  @Override
+  public String toString() {
+    final var selector = configuration.getLabelSelector();
+    return "InformerManager ["
+        + ReconcilerUtils.getResourceTypeNameWithVersion(configuration.getResourceClass())
+        + "] watching: "
+        + configuration.getEffectiveNamespaces()
+        + (selector != null ? " selector: " + selector : "");
+  }
 }

operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/informer/InformerWrapper.java

@@ -38,16 +38,18 @@ public void start() throws OperatorException {
     try {
       informer.run();
     } catch (Exception e) {
-      final var apiTypeClass = informer.getApiTypeClass();
-      final var fullResourceName = HasMetadata.getFullResourceName(apiTypeClass);
-      final var version = HasMetadata.getVersion(apiTypeClass);
-      log.error("Couldn't start informer for " + fullResourceName + "/" + version + " resources",
-          e);
-      ReconcilerUtils.handleKubernetesClientException(e, fullResourceName);
+      log.error("Couldn't start informer for " + versionedFullResourceName() + " resources", e);
+      ReconcilerUtils.handleKubernetesClientException(e,
+          HasMetadata.getFullResourceName(informer.getApiTypeClass()));
       throw e;
     }
   }
 
+  private String versionedFullResourceName() {
+    final var apiTypeClass = informer.getApiTypeClass();
+    return ReconcilerUtils.getResourceTypeNameWithVersion(apiTypeClass);
+  }
+
   @Override
   public void stop() throws OperatorException {
     informer.stop();
@@ -92,4 +94,9 @@ public void addIndexers(Map<String, Function<T, List<String>>> indexers) {
   public List<T> byIndex(String indexName, String indexKey) {
     return informer.getIndexer().byIndex(indexName, indexKey);
   }
+
+  @Override
+  public String toString() {
+    return "InformerWrapper [" + versionedFullResourceName() + "] (" + informer + ')';
+  }
 }