Add kubevirt API config service, expose it via REST API and CLI

Change-Id: I45a867ad54622656475758e7b4af38c19e551790
diff --git a/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtApiConfigCodecTest.java b/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtApiConfigCodecTest.java
new file mode 100644
index 0000000..773401e
--- /dev/null
+++ b/apps/kubevirt-node/app/src/test/java/org/onosproject/kubevirtnode/codec/KubevirtApiConfigCodecTest.java
@@ -0,0 +1,158 @@
+/*
+ * 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.codec;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.IpAddress;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.codec.impl.CodecManager;
+import org.onosproject.core.CoreService;
+import org.onosproject.kubevirtnode.api.DefaultKubevirtApiConfig;
+import org.onosproject.kubevirtnode.api.KubevirtApiConfig;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+import static junit.framework.TestCase.assertEquals;
+import static org.easymock.EasyMock.createMock;
+import static org.easymock.EasyMock.expect;
+import static org.easymock.EasyMock.replay;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.onosproject.kubevirtnode.api.KubevirtApiConfig.Scheme.HTTPS;
+import static org.onosproject.kubevirtnode.api.KubevirtApiConfig.State.CONNECTED;
+import static org.onosproject.kubevirtnode.codec.KubevirtApiConfigJsonMatcher.matchesKubevirtApiConfig;
+import static org.onosproject.net.NetTestTools.APP_ID;
+
+/**
+ * Unit tests for KubeVirt API config codec.
+ */
+public class KubevirtApiConfigCodecTest {
+
+    MockCodecContext context;
+
+    JsonCodec<KubevirtApiConfig> kubevirtApiConfigCodec;
+
+    final CoreService mockCoreService = createMock(CoreService.class);
+    private static final String REST_APP_ID = "org.onosproject.rest";
+
+    /**
+     * Initial setup for this unit test.
+     */
+    @Before
+    public void setUp() {
+        context = new MockCodecContext();
+        kubevirtApiConfigCodec = new KubevirtApiConfigCodec();
+
+        assertThat(kubevirtApiConfigCodec, notNullValue());
+
+        expect(mockCoreService.registerApplication(REST_APP_ID))
+                .andReturn(APP_ID).anyTimes();
+        replay(mockCoreService);
+        context.registerService(CoreService.class, mockCoreService);
+    }
+
+    /**
+     * Tests the KubeVirt API config encoding.
+     */
+    @Test
+    public void testKubevirtApiConfigEncode() {
+        KubevirtApiConfig config = DefaultKubevirtApiConfig.builder()
+                .scheme(HTTPS)
+                .ipAddress(IpAddress.valueOf("10.10.10.23"))
+                .port(6443)
+                .state(CONNECTED)
+                .token("token")
+                .caCertData("caCertData")
+                .clientCertData("clientCertData")
+                .clientKeyData("clientKeyData")
+                .build();
+        ObjectNode configJson = kubevirtApiConfigCodec.encode(config, context);
+        assertThat(configJson, matchesKubevirtApiConfig(config));
+    }
+
+    /**
+     * Tests the KubeVirt API config decoding.
+     *
+     * @throws IOException IO exception
+     */
+    @Test
+    public void testKubevirtApiConfigDecode() throws IOException {
+        KubevirtApiConfig config = getKubevirtApiConfig("KubevirtApiConfig.json");
+
+        assertEquals("HTTPS", config.scheme().name());
+        assertEquals("10.134.34.223", config.ipAddress().toString());
+        assertEquals(6443, config.port());
+        assertEquals("token", config.token());
+        assertEquals("caCertData", config.caCertData());
+        assertEquals("clientCertData", config.clientCertData());
+        assertEquals("clientKeyData", config.clientKeyData());
+    }
+
+    private KubevirtApiConfig getKubevirtApiConfig(String resourceName) throws IOException {
+        InputStream jsonStream = KubevirtNodeCodecTest.class.getResourceAsStream(resourceName);
+        JsonNode json = context.mapper().readTree(jsonStream);
+        assertThat(json, notNullValue());
+        KubevirtApiConfig config = kubevirtApiConfigCodec.decode((ObjectNode) json, context);
+        assertThat(config, notNullValue());
+        return config;
+    }
+
+    private class MockCodecContext implements CodecContext {
+        private final ObjectMapper mapper = new ObjectMapper();
+        private final CodecManager manager = new CodecManager();
+        private final Map<Class<?>, Object> services = new HashMap<>();
+
+        /**
+         * Constructs a new mock codec context.
+         */
+        public MockCodecContext() {
+            manager.activate();
+        }
+
+        @Override
+        public ObjectMapper mapper() {
+            return mapper;
+        }
+
+        @Override
+        @SuppressWarnings("unchecked")
+        public <T> JsonCodec<T> codec(Class<T> entityClass) {
+            if (entityClass == KubevirtApiConfig.class) {
+                return (JsonCodec<T>) kubevirtApiConfigCodec;
+            }
+            return manager.getCodec(entityClass);
+        }
+
+        @SuppressWarnings("unchecked")
+        @Override
+        public <T> T getService(Class<T> serviceClass) {
+            return (T) services.get(serviceClass);
+        }
+
+        // for registering mock services
+        public <T> void registerService(Class<T> serviceClass, T impl) {
+            services.put(serviceClass, impl);
+        }
+    }
+}