Implement kubernetes external loadbalancer handler.
Change-Id: I0f3057d66769f0ca7db7d508483835cdd1ff1593
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubernetesExternalLbConfigStore.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubernetesExternalLbConfigStore.java
new file mode 100644
index 0000000..16a816e
--- /dev/null
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubernetesExternalLbConfigStore.java
@@ -0,0 +1,191 @@
+/*
+ * Copyright 2022-present Open Networking 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.
+ */
+package org.onosproject.kubevirtnode.impl;
+
+import com.google.common.collect.ImmutableSet;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.kubevirtnode.api.DefaultKubernetesExternalLbConfig;
+import org.onosproject.kubevirtnode.api.KubernetesExternalLbConfig;
+import org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigEvent;
+import org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigStore;
+import org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigStoreDelegate;
+import org.onosproject.store.AbstractStore;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.onosproject.store.service.ConsistentMap;
+import org.onosproject.store.service.MapEvent;
+import org.onosproject.store.service.MapEventListener;
+import org.onosproject.store.service.Serializer;
+import org.onosproject.store.service.StorageService;
+import org.onosproject.store.service.Versioned;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.slf4j.Logger;
+
+import java.util.Collection;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigEvent.Type
+ .KUBERNETES_EXTERNAL_LB_CONFIG_CREATED;
+import static org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigEvent.Type
+ .KUBERNETES_EXTERNAL_LB_CONFIG_REMOVED;
+import static org.onosproject.kubevirtnode.api.KubernetesExternalLbConfigEvent.Type
+ .KUBERNETES_EXTERNAL_LB_CONFIG_UPDATED;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Implementation of kubernetes external lb config store using consistent map.
+ */
+@Component(immediate = true, service = KubernetesExternalLbConfigStore.class)
+public class DistributedKubernetesExternalLbConfigStore
+ extends AbstractStore<KubernetesExternalLbConfigEvent, KubernetesExternalLbConfigStoreDelegate>
+ implements KubernetesExternalLbConfigStore {
+
+ private final Logger log = getLogger(getClass());
+
+ private static final String ERR_NOT_FOUND = " does not exist";
+ private static final String ERR_DUPLICATE = " already exists";
+ private static final String APP_ID = "org.onosproject.kubevirtnode";
+
+ private static final KryoNamespace
+ SERIALIZER_KUBERNETES_EXTERNAL_LB_CONFIG = KryoNamespace.newBuilder()
+ .register(KryoNamespaces.API)
+ .register(KubernetesExternalLbConfig.class)
+ .register(DefaultKubernetesExternalLbConfig.class)
+ .register(IpAddress.class)
+ .register(MacAddress.class)
+ .register(Collection.class)
+ .build();
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected CoreService coreService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected StorageService storageService;
+
+ private final ExecutorService eventExecutor = newSingleThreadExecutor(
+ groupedThreads(this.getClass().getSimpleName(), "event-handler", log));
+
+ private final MapEventListener<String, KubernetesExternalLbConfig> lbConfigMapEventListener =
+ new KubernetesExternalLbConfigMapListener();
+
+ private ConsistentMap<String, KubernetesExternalLbConfig> lbConfigStore;
+
+ @Activate
+ protected void activate() {
+ ApplicationId appId = coreService.registerApplication(APP_ID);
+ lbConfigStore = storageService.<String, KubernetesExternalLbConfig>consistentMapBuilder()
+ .withSerializer(Serializer.using(SERIALIZER_KUBERNETES_EXTERNAL_LB_CONFIG))
+ .withName("kubernetes-lbconfigstore")
+ .withApplicationId(appId)
+ .build();
+
+ lbConfigStore.addListener(lbConfigMapEventListener);
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ lbConfigStore.removeListener(lbConfigMapEventListener);
+ eventExecutor.shutdown();
+ log.info("Stopped");
+ }
+
+ @Override
+ public void createExternalLbConfig(KubernetesExternalLbConfig lbConfig) {
+ lbConfigStore.compute(lbConfig.configName(), (configName, existing) -> {
+ final String error = lbConfig.configName() + ERR_DUPLICATE;
+ checkArgument(existing == null, error);
+ return lbConfig;
+ });
+ }
+
+ @Override
+ public void updateExternalLbConfig(KubernetesExternalLbConfig lbConfig) {
+ lbConfigStore.compute(lbConfig.configName(), (configName, existing) -> {
+ final String error = lbConfig.configName() + ERR_NOT_FOUND;
+ checkArgument(existing != null, error);
+ return lbConfig;
+ });
+ }
+
+ @Override
+ public KubernetesExternalLbConfig removeExternalLbConfig(String configName) {
+
+ Versioned<KubernetesExternalLbConfig> lbConfig = lbConfigStore.remove(configName);
+
+ if (lbConfig == null) {
+ final String error = configName + ERR_NOT_FOUND;
+ throw new IllegalArgumentException(error);
+ }
+
+ return lbConfig.value();
+ }
+
+ @Override
+ public KubernetesExternalLbConfig externalLbConfig(String configName) {
+ return lbConfigStore.asJavaMap().get(configName);
+ }
+
+ @Override
+ public Set<KubernetesExternalLbConfig> externalLbConfigs() {
+
+ return ImmutableSet.copyOf(lbConfigStore.asJavaMap().values());
+ }
+
+ @Override
+ public void clear() {
+ lbConfigStore.clear();
+ }
+
+ private class KubernetesExternalLbConfigMapListener
+ implements MapEventListener<String, KubernetesExternalLbConfig> {
+
+ @Override
+ public void event(MapEvent<String, KubernetesExternalLbConfig> event) {
+ switch (event.type()) {
+ case INSERT:
+ eventExecutor.execute(() ->
+ notifyDelegate(new KubernetesExternalLbConfigEvent(
+ KUBERNETES_EXTERNAL_LB_CONFIG_CREATED, event.newValue().value())));
+ break;
+ case UPDATE:
+ eventExecutor.execute(() ->
+ notifyDelegate(new KubernetesExternalLbConfigEvent(
+ KUBERNETES_EXTERNAL_LB_CONFIG_UPDATED, event.newValue().value())));
+ break;
+ case REMOVE:
+ eventExecutor.execute(() ->
+ notifyDelegate(new KubernetesExternalLbConfigEvent(
+ KUBERNETES_EXTERNAL_LB_CONFIG_REMOVED, event.oldValue().value())));
+ break;
+ default:
+ //do nothing
+ break;
+ }
+ }
+ }
+}