[ONOS-7942] Implement k8s ingress service and watcher with unit tests
Change-Id: I8089336916e882bd31b40facf73c46c5ee541718
diff --git a/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sIngressManager.java b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sIngressManager.java
new file mode 100644
index 0000000..037ff0c
--- /dev/null
+++ b/apps/k8s-networking/app/src/main/java/org/onosproject/k8snetworking/impl/K8sIngressManager.java
@@ -0,0 +1,162 @@
+/*
+ * 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.k8snetworking.impl;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableSet;
+import io.fabric8.kubernetes.api.model.extensions.Ingress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.event.ListenerRegistry;
+import org.onosproject.k8snetworking.api.K8sIngressAdminService;
+import org.onosproject.k8snetworking.api.K8sIngressEvent;
+import org.onosproject.k8snetworking.api.K8sIngressListener;
+import org.onosproject.k8snetworking.api.K8sIngressService;
+import org.onosproject.k8snetworking.api.K8sIngressStore;
+import org.onosproject.k8snetworking.api.K8sIngressStoreDelegate;
+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.Set;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onosproject.k8snetworking.api.Constants.K8S_NETWORKING_APP_ID;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Provides implementation of administering and interfacing kubernetes ingress.
+ */
+@Component(
+ immediate = true,
+ service = {K8sIngressAdminService.class, K8sIngressService.class}
+)
+public class K8sIngressManager
+ extends ListenerRegistry<K8sIngressEvent, K8sIngressListener>
+ implements K8sIngressAdminService, K8sIngressService {
+
+ protected final Logger log = getLogger(getClass());
+
+ private static final String MSG_INGRESS = "Kubernetes ingress %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_INGRESS = "Kubernetes ingress cannot be null";
+ private static final String ERR_NULL_INGRESS_UID = "Kubernetes ingress UID cannot be null";
+
+ private static final String ERR_IN_USE = " still in use";
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected CoreService coreService;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY)
+ protected K8sIngressStore k8sIngressStore;
+
+ private final K8sIngressStoreDelegate delegate = new InternalIngressStorageDelegate();
+
+ private ApplicationId appId;
+
+ @Activate
+ protected void activate() {
+ appId = coreService.registerApplication(K8S_NETWORKING_APP_ID);
+
+ k8sIngressStore.setDelegate(delegate);
+ log.info("Started");
+ }
+
+ @Deactivate
+ protected void deactivate() {
+ k8sIngressStore.unsetDelegate(delegate);
+ log.info("Stopped");
+ }
+
+ @Override
+ public void createIngress(Ingress ingress) {
+ checkNotNull(ingress, ERR_NULL_INGRESS);
+ checkArgument(!Strings.isNullOrEmpty(ingress.getMetadata().getUid()),
+ ERR_NULL_INGRESS_UID);
+
+ k8sIngressStore.createIngress(ingress);
+
+ log.info(String.format(MSG_INGRESS, ingress.getMetadata().getName(), MSG_CREATED));
+ }
+
+ @Override
+ public void updateIngress(Ingress ingress) {
+ checkNotNull(ingress, ERR_NULL_INGRESS);
+ checkArgument(!Strings.isNullOrEmpty(ingress.getMetadata().getUid()),
+ ERR_NULL_INGRESS_UID);
+
+ k8sIngressStore.updateIngress(ingress);
+
+ log.info(String.format(MSG_INGRESS, ingress.getMetadata().getName(), MSG_UPDATED));
+ }
+
+ @Override
+ public void removeIngress(String uid) {
+ checkArgument(!Strings.isNullOrEmpty(uid), ERR_NULL_INGRESS_UID);
+
+ synchronized (this) {
+ if (isIngressInUse(uid)) {
+ final String error = String.format(MSG_INGRESS, uid, ERR_IN_USE);
+ throw new IllegalStateException(error);
+ }
+
+ Ingress ingress = k8sIngressStore.removeIngress(uid);
+
+ if (ingress != null) {
+ log.info(String.format(MSG_INGRESS,
+ ingress.getMetadata().getName(), MSG_REMOVED));
+ }
+ }
+ }
+
+ @Override
+ public void clear() {
+ k8sIngressStore.clear();
+ }
+
+ @Override
+ public Ingress ingress(String uid) {
+ checkArgument(!Strings.isNullOrEmpty(uid), ERR_NULL_INGRESS_UID);
+ return k8sIngressStore.ingress(uid);
+ }
+
+ @Override
+ public Set<Ingress> ingresses() {
+ return ImmutableSet.copyOf(k8sIngressStore.ingresses());
+ }
+
+ private boolean isIngressInUse(String uid) {
+ return false;
+ }
+
+ private class InternalIngressStorageDelegate implements K8sIngressStoreDelegate {
+
+ @Override
+ public void notify(K8sIngressEvent event) {
+ if (event != null) {
+ log.trace("send kubernetes ingress event {}", event);
+ process(event);
+ }
+ }
+ }
+}