Move service data to commons (#1394)

Author: wind57

spring-cloud-kubernetes-commons/src/main/java/org/springframework/cloud/kubernetes/commons/discovery/DiscoveryClientUtils.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2019-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.kubernetes.commons.discovery;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.core.log.LogAccessor;
+
+import static org.springframework.cloud.kubernetes.commons.config.ConfigUtils.keysWithPrefix;
+import static org.springframework.cloud.kubernetes.commons.discovery.KubernetesDiscoveryConstants.NAMESPACE_METADATA_KEY;
+import static org.springframework.cloud.kubernetes.commons.discovery.KubernetesDiscoveryConstants.SERVICE_TYPE;
+
+/**
+ * @author wind57
+ */
+public final class DiscoveryClientUtils {
+
+	private static final LogAccessor LOG = new LogAccessor(LogFactory.getLog(DiscoveryClientUtils.class));
+
+	private DiscoveryClientUtils() {
+		throw new AssertionError("no instance provided");
+	}
+
+	/**
+	 * This adds the following metadata. <pre>
+	 *     - labels (if requested)
+	 *     - annotations (if requested)
+	 *     - ports (if requested)
+	 *     - namespace
+	 *     - service type
+	 * </pre>
+	 */
+	public static Map<String, String> serviceMetadata(String serviceId, Map<String, String> serviceLabels,
+			Map<String, String> serviceAnnotations, Map<String, String> portsData,
+			KubernetesDiscoveryProperties properties, String namespace, String serviceType) {
+		Map<String, String> serviceMetadata = new HashMap<>();
+		KubernetesDiscoveryProperties.Metadata metadataProps = properties.metadata();
+		if (metadataProps.addLabels()) {
+			Map<String, String> labelMetadata = keysWithPrefix(serviceLabels, metadataProps.labelsPrefix());
+			LOG.debug(() -> "Adding labels metadata: " + labelMetadata + " for serviceId: " + serviceId);
+			serviceMetadata.putAll(labelMetadata);
+		}
+		if (metadataProps.addAnnotations()) {
+			Map<String, String> annotationMetadata = keysWithPrefix(serviceAnnotations,
+					metadataProps.annotationsPrefix());
+			LOG.debug(() -> "Adding annotations metadata: " + annotationMetadata + " for serviceId: " + serviceId);
+			serviceMetadata.putAll(annotationMetadata);
+		}
+
+		if (metadataProps.addPorts()) {
+			Map<String, String> portMetadata = keysWithPrefix(portsData, properties.metadata().portsPrefix());
+			if (!portMetadata.isEmpty()) {
+				LOG.debug(() -> "Adding port metadata: " + portMetadata + " for serviceId : " + serviceId);
+			}
+			serviceMetadata.putAll(portMetadata);
+		}
+
+		serviceMetadata.put(NAMESPACE_METADATA_KEY, namespace);
+		serviceMetadata.put(SERVICE_TYPE, serviceType);
+		return serviceMetadata;
+	}
+
+}