[ONOS-7902] Add default implementation of k8s node with unit tests
Change-Id: I283967ae14dc7f38e749d7407e4bec698536c18b
diff --git a/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java
new file mode 100644
index 0000000..d80ef21
--- /dev/null
+++ b/apps/k8s-node/app/src/main/java/org/onosproject/k8snode/impl/K8sNodeManager.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2019-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.k8snode.impl;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableSet;
+import org.onlab.util.Tools;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.cluster.LeadershipService;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.event.ListenerRegistry;
+import org.onosproject.k8snode.api.K8sNode;
+import org.onosproject.k8snode.api.K8sNode.Type;
+import org.onosproject.k8snode.api.K8sNodeAdminService;
+import org.onosproject.k8snode.api.K8sNodeEvent;
+import org.onosproject.k8snode.api.K8sNodeListener;
+import org.onosproject.k8snode.api.K8sNodeService;
+import org.onosproject.k8snode.api.K8sNodeStore;
+import org.onosproject.k8snode.api.K8sNodeStoreDelegate;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.store.service.StorageService;
+import org.osgi.service.component.ComponentContext;
+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.Modified;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
+import org.slf4j.Logger;
+
+import java.util.Dictionary;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.stream.Collectors;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.k8snode.api.K8sNodeState.COMPLETE;
+import static org.onosproject.k8snode.impl.OsgiPropertyConstants.OVSDB_PORT;
+import static org.onosproject.k8snode.impl.OsgiPropertyConstants.OVSDB_PORT_NUM_DEFAULT;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Service administering the inventory of kubernetes nodes.
+ */
+@Component(
+ immediate = true,
+ service = { K8sNodeService.class, K8sNodeAdminService.class },
+ property = {
+ OVSDB_PORT + ":Integer=" + OVSDB_PORT_NUM_DEFAULT
+ }
+)
+public class K8sNodeManager
+ extends ListenerRegistry<K8sNodeEvent, K8sNodeListener>
+ implements K8sNodeService, K8sNodeAdminService {
+
+ private final Logger log = getLogger(getClass());
+
+ private static final String MSG_NODE = "Kubernetes node %s %s";
+ private static final String MSG_CREATED = "created";
+ private static final String MSG_UPDATED = "updated";
+ private static final String MSG_REMOVED = "removed";
+
+ private static final String ERR_NULL_NODE = "Kubernetes node cannot be null";
+ private static final String ERR_NULL_HOSTNAME = "Kubernetes node hostname cannot be null";
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected K8sNodeStore nodeStore;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected CoreService coreService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected ClusterService clusterService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected LeadershipService leadershipService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected StorageService storageService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected DeviceService deviceService;
+
+ /** OVSDB server listen port. */
+ private int ovsdbPortNum = OVSDB_PORT_NUM_DEFAULT;
+
+ private final ExecutorService eventExecutor = newSingleThreadExecutor(
+ groupedThreads(this.getClass().getSimpleName(), "event-handler", log));
+
+ private final K8sNodeStoreDelegate delegate = new K8sNodeManager.InternalNodeStoreDelegate();
+
+ private ApplicationId appId;
+
+ @Activate
+ protected void activate() {
+ appId = coreService.registerApplication(APP_ID);
+ nodeStore.setDelegate(delegate);
+
+ leadershipService.runForLeadership(appId.name());
+
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ nodeStore.unsetDelegate(delegate);
+
+ leadershipService.withdraw(appId.name());
+ eventExecutor.shutdown();
+
+ log.info("Stopped");
+ }
+
+ @Modified
+ protected void modified(ComponentContext context) {
+ Dictionary<?, ?> properties = context.getProperties();
+ int updatedOvsdbPort = Tools.getIntegerProperty(properties, OVSDB_PORT);
+ if (!Objects.equals(updatedOvsdbPort, ovsdbPortNum)) {
+ ovsdbPortNum = updatedOvsdbPort;
+ }
+
+ log.info("Modified");
+ }
+
+ @Override
+ public void createNode(K8sNode node) {
+ checkNotNull(node, ERR_NULL_NODE);
+ nodeStore.createNode(node);
+ log.info(String.format(MSG_NODE, node.hostname(), MSG_CREATED));
+ }
+
+ @Override
+ public void updateNode(K8sNode node) {
+ checkNotNull(node, ERR_NULL_NODE);
+ nodeStore.updateNode(node);
+ log.info(String.format(MSG_NODE, node.hostname(), MSG_UPDATED));
+ }
+
+ @Override
+ public K8sNode removeNode(String hostname) {
+ checkArgument(!Strings.isNullOrEmpty(hostname), ERR_NULL_HOSTNAME);
+ K8sNode node = nodeStore.removeNode(hostname);
+ log.info(String.format(MSG_NODE, hostname, MSG_REMOVED));
+ return node;
+ }
+
+ @Override
+ public Set<K8sNode> nodes() {
+ return nodeStore.nodes();
+ }
+
+ @Override
+ public Set<K8sNode> nodes(Type type) {
+ Set<K8sNode> nodes = nodeStore.nodes().stream()
+ .filter(node -> Objects.equals(node.type(), type))
+ .collect(Collectors.toSet());
+ return ImmutableSet.copyOf(nodes);
+ }
+
+ @Override
+ public Set<K8sNode> completeNodes() {
+ Set<K8sNode> nodes = nodeStore.nodes().stream()
+ .filter(node -> node.state() == COMPLETE)
+ .collect(Collectors.toSet());
+ return ImmutableSet.copyOf(nodes);
+ }
+
+ @Override
+ public Set<K8sNode> completeNodes(Type type) {
+ Set<K8sNode> nodes = nodeStore.nodes().stream()
+ .filter(node -> node.type() == type &&
+ node.state() == COMPLETE)
+ .collect(Collectors.toSet());
+ return ImmutableSet.copyOf(nodes);
+ }
+
+ @Override
+ public K8sNode node(String hostname) {
+ return nodeStore.node(hostname);
+ }
+
+ @Override
+ public K8sNode node(DeviceId deviceId) {
+ return nodeStore.nodes().stream()
+ .filter(node -> Objects.equals(node.intgBridge(), deviceId) ||
+ Objects.equals(node.ovsdb(), deviceId))
+ .findFirst().orElse(null);
+ }
+
+ private class InternalNodeStoreDelegate implements K8sNodeStoreDelegate {
+
+ @Override
+ public void notify(K8sNodeEvent event) {
+ if (event != null) {
+ log.trace("send kubernetes node event {}", event);
+ process(event);
+ }
+ }
+ }
+}