[ONOS-7942] Implement k8s ingress service and watcher with unit tests
Change-Id: I8089336916e882bd31b40facf73c46c5ee541718
diff --git a/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sIngressService.java b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sIngressService.java
new file mode 100644
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--- /dev/null
+++ b/apps/k8s-networking/api/src/main/java/org/onosproject/k8snetworking/api/K8sIngressService.java
@@ -0,0 +1,43 @@
+/*
+ * 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.api;
+
+import io.fabric8.kubernetes.api.model.extensions.Ingress;
+import org.onosproject.event.ListenerService;
+
+import java.util.Set;
+
+/**
+ * Service for interacting with the inventory of kubernetes ingress.
+ */
+public interface K8sIngressService
+ extends ListenerService<K8sIngressEvent, K8sIngressListener> {
+
+ /**
+ * Returns the kubernetes ingress with the supplied ingress UID.
+ *
+ * @param uid ingress UID
+ * @return kubernetes ingress
+ */
+ Ingress ingress(String uid);
+
+ /**
+ * Returns all kubernetes ingresses registered.
+ *
+ * @return set of kubernetes ingresses
+ */
+ Set<Ingress> ingresses();
+}