1 files changed, 85 insertions, 0 deletions
diff --git a/so-cnfm/so-cnfm-lcm/so-cnfm-lcm-bpmn-flows/src/main/java/org/onap/so/cnfm/lcm/bpmn/flows/extclients/kubernetes/KubernetesClientProviderImpl.java b/so-cnfm/so-cnfm-lcm/so-cnfm-lcm-bpmn-flows/src/main/java/org/onap/so/cnfm/lcm/bpmn/flows/extclients/kubernetes/KubernetesClientProviderImpl.java
new file mode 100644
index 0000000..f8837a9
--- /dev/null
+++ b/so-cnfm/so-cnfm-lcm/so-cnfm-lcm-bpmn-flows/src/main/java/org/onap/so/cnfm/lcm/bpmn/flows/extclients/kubernetes/KubernetesClientProviderImpl.java
@@ -0,0 +1,85 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2023 Nordix Foundation.
+ * ================================================================================
+ * 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
+ *
+ *      http://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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.cnfm.lcm.bpmn.flows.extclients.kubernetes;
+
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.Reader;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import org.onap.so.cnfm.lcm.bpmn.flows.exceptions.KubeConfigFileProcessingException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.config.ConfigurableBeanFactory;
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Component;
+import io.kubernetes.client.openapi.ApiClient;
+import io.kubernetes.client.util.ClientBuilder;
+import io.kubernetes.client.util.KubeConfig;
+
+/**
+ *
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Component
+@Scope(value = ConfigurableBeanFactory.SCOPE_SINGLETON)
+public class KubernetesClientProviderImpl implements KubernetesClientProvider {
+    private static final Logger logger = LoggerFactory.getLogger(KubernetesClientProviderImpl.class);
+    private static final Map<String, ApiClient> INSTANCES = new ConcurrentHashMap<>();
+
+    @Override
+    public ApiClient getApiClient(final String kubeConfigPath) {
+
+        ApiClient client = INSTANCES.get(kubeConfigPath.toString());
+        if (client == null) {
+            synchronized (this) {
+                try (final Reader input = new FileReader(kubeConfigPath);) {
+                    logger.debug("{} Loading kube-config file", kubeConfigPath);
+                    final KubeConfig kubeConfig = KubeConfig.loadKubeConfig(input);
+                    logger.debug("{} kube-config loaded successfully", kubeConfigPath);
+                    client = ClientBuilder.kubeconfig(kubeConfig).build();
+                    logger.debug("ApiClient created successfully");
+                    INSTANCES.put(kubeConfigPath, client);
+                } catch (final FileNotFoundException fileNotFoundException) {
+                    logger.error("{} KubeConfig not found", kubeConfigPath, fileNotFoundException);
+                    throw new KubeConfigFileProcessingException(kubeConfigPath + " kube-config file not found",
+                            fileNotFoundException);
+                } catch (final Exception exception) {
+                    final String message = "Unexpected exception while processing kube-config file";
+                    logger.error(message, exception);
+                    throw new KubeConfigFileProcessingException(message, exception);
+                }
+            }
+        }
+        logger.debug("Found ApiClient for {}", kubeConfigPath);
+        return client;
+    }
+
+    @Override
+    public void closeApiClient(final String kubeConfigFile) {
+        final ApiClient client = INSTANCES.get(kubeConfigFile);
+        if (client != null) {
+            logger.debug("Closing ApiClient and removing it from local cache for {}", kubeConfigFile);
+            INSTANCES.remove(kubeConfigFile);
+        }
+    }
+
+}