Implement kubevirt node service, expose it through REST API and CLI
Change-Id: Ieebd2652af31344df3a7c91d3669a2ba150cb57f
diff --git a/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubevirtNodeStore.java b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubevirtNodeStore.java
new file mode 100644
index 0000000..ee488d4
--- /dev/null
+++ b/apps/kubevirt-node/app/src/main/java/org/onosproject/kubevirtnode/impl/DistributedKubevirtNodeStore.java
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2020-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;
+
+/**
+ * Implementation of kubevirt node store using consistent map.
+ */
+
+import com.google.common.collect.ImmutableSet;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.kubevirtnode.api.DefaultKubevirtNode;
+import org.onosproject.kubevirtnode.api.DefaultKubevirtPhyInterface;
+import org.onosproject.kubevirtnode.api.KubevirtNode;
+import org.onosproject.kubevirtnode.api.KubevirtNodeEvent;
+import org.onosproject.kubevirtnode.api.KubevirtNodeState;
+import org.onosproject.kubevirtnode.api.KubevirtNodeStore;
+import org.onosproject.kubevirtnode.api.KubevirtNodeStoreDelegate;
+import org.onosproject.kubevirtnode.api.KubevirtPhyInterface;
+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.KubevirtNodeEvent.Type.KUBEVIRT_NODE_COMPLETE;
+import static org.onosproject.kubevirtnode.api.KubevirtNodeEvent.Type.KUBEVIRT_NODE_CREATED;
+import static org.onosproject.kubevirtnode.api.KubevirtNodeEvent.Type.KUBEVIRT_NODE_INCOMPLETE;
+import static org.onosproject.kubevirtnode.api.KubevirtNodeEvent.Type.KUBEVIRT_NODE_REMOVED;
+import static org.onosproject.kubevirtnode.api.KubevirtNodeEvent.Type.KUBEVIRT_NODE_UPDATED;
+import static org.slf4j.LoggerFactory.getLogger;
+
+@Component(immediate = true, service = KubevirtNodeStore.class)
+public class DistributedKubevirtNodeStore
+ extends AbstractStore<KubevirtNodeEvent, KubevirtNodeStoreDelegate>
+ implements KubevirtNodeStore {
+
+ 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_KUBEVIRT_NODE = KryoNamespace.newBuilder()
+ .register(KryoNamespaces.API)
+ .register(KubevirtNode.class)
+ .register(DefaultKubevirtNode.class)
+ .register(KubevirtPhyInterface.class)
+ .register(DefaultKubevirtPhyInterface.class)
+ .register(KubevirtNode.Type.class)
+ .register(KubevirtNodeState.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, KubevirtNode> nodeMapEventListener =
+ new KubevirtNodeMapListener();
+
+ private ConsistentMap<String, KubevirtNode> nodeStore;
+
+ @Activate
+ protected void activate() {
+ ApplicationId appId = coreService.registerApplication(APP_ID);
+ nodeStore = storageService.<String, KubevirtNode>consistentMapBuilder()
+ .withSerializer(Serializer.using(SERIALIZER_KUBEVIRT_NODE))
+ .withName("kubevirt-nodestore")
+ .withApplicationId(appId)
+ .build();
+ nodeStore.addListener(nodeMapEventListener);
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ nodeStore.removeListener(nodeMapEventListener);
+ eventExecutor.shutdown();
+ log.info("Stopped");
+ }
+
+ @Override
+ public void createNode(KubevirtNode node) {
+ nodeStore.compute(node.hostname(), (hostname, existing) -> {
+ final String error = node.hostname() + ERR_DUPLICATE;
+ checkArgument(existing == null, error);
+ return node;
+ });
+ }
+
+ @Override
+ public void updateNode(KubevirtNode node) {
+ nodeStore.compute(node.hostname(), (hostname, existing) -> {
+ final String error = node.hostname() + ERR_NOT_FOUND;
+ checkArgument(existing != null, error);
+ return node;
+ });
+ }
+
+ @Override
+ public KubevirtNode removeNode(String hostname) {
+ Versioned<KubevirtNode> node = nodeStore.remove(hostname);
+ if (node == null) {
+ final String error = hostname + ERR_NOT_FOUND;
+ throw new IllegalArgumentException(error);
+ }
+ return node.value();
+ }
+
+ @Override
+ public Set<KubevirtNode> nodes() {
+ return ImmutableSet.copyOf(nodeStore.asJavaMap().values());
+ }
+
+ @Override
+ public KubevirtNode node(String hostname) {
+ return nodeStore.asJavaMap().get(hostname);
+ }
+
+ private class KubevirtNodeMapListener
+ implements MapEventListener<String, KubevirtNode> {
+
+ @Override
+ public void event(MapEvent<String, KubevirtNode> event) {
+ switch (event.type()) {
+ case INSERT:
+ log.debug("Kubevirt node created {}", event.newValue());
+ eventExecutor.execute(() -> processNodeCreation(event));
+ break;
+ case UPDATE:
+ log.debug("Kubevirt node updated {}", event.newValue());
+ eventExecutor.execute(() -> processNodeUpdate(event));
+ break;
+ case REMOVE:
+ log.debug("Kubevirt node removed {}", event.oldValue());
+ eventExecutor.execute(() -> processNodeRemoval(event));
+ break;
+ default:
+ // do nothing
+ break;
+ }
+ }
+
+ private void processNodeCreation(MapEvent<String, KubevirtNode> event) {
+ notifyDelegate(new KubevirtNodeEvent(
+ KUBEVIRT_NODE_CREATED, event.newValue().value()));
+ }
+
+ private void processNodeUpdate(MapEvent<String, KubevirtNode> event) {
+ notifyDelegate(new KubevirtNodeEvent(
+ KUBEVIRT_NODE_UPDATED, event.newValue().value()));
+
+ if (event.newValue().value().state() == KubevirtNodeState.COMPLETE) {
+ notifyDelegate(new KubevirtNodeEvent(
+ KUBEVIRT_NODE_COMPLETE, event.newValue().value()));
+ } else if (event.newValue().value().state() == KubevirtNodeState.INCOMPLETE) {
+ notifyDelegate(new KubevirtNodeEvent(
+ KUBEVIRT_NODE_INCOMPLETE, event.newValue().value()));
+ }
+ }
+
+ private void processNodeRemoval(MapEvent<String, KubevirtNode> event) {
+ notifyDelegate(new KubevirtNodeEvent(
+ KUBEVIRT_NODE_REMOVED, event.oldValue().value()));
+ }
+ }
+}