CORD-433 Implemented XOS REST client and cordvtn service API
Change-Id: I4324240e1cdc9c0b059757565e20fdab995b9e5d
diff --git a/apps/xosclient/src/main/java/org/onosproject/xosclient/impl/DefaultVtnServiceApi.java b/apps/xosclient/src/main/java/org/onosproject/xosclient/impl/DefaultVtnServiceApi.java
new file mode 100644
index 0000000..d327dae
--- /dev/null
+++ b/apps/xosclient/src/main/java/org/onosproject/xosclient/impl/DefaultVtnServiceApi.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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.xosclient.impl;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.base.Strings;
+import com.google.common.collect.Sets;
+import org.onosproject.xosclient.api.VtnServiceApi;
+import org.onosproject.xosclient.api.XosAccess;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Provides CORD VTN service and service dependency APIs.
+ */
+public final class DefaultVtnServiceApi extends XosApi implements VtnServiceApi {
+
+ private final Logger log = LoggerFactory.getLogger(getClass());
+
+ private static DefaultVtnServiceApi instance = null;
+
+ /**
+ * Default constructor.
+ */
+ private DefaultVtnServiceApi(String baseUrl, XosAccess access) {
+ super(baseUrl, access);
+ }
+
+ /**
+ * Returns VTN service API instance. Creates a new instance only if base url or
+ * access has been changed.
+ *
+ * @param baseUrl base url
+ * @param access access
+ * @return vtn service api
+ */
+ public static synchronized DefaultVtnServiceApi getInstance(String baseUrl, XosAccess access) {
+ checkNotNull(access, "XOS access information is null");
+ checkArgument(!Strings.isNullOrEmpty(baseUrl), "VTN service API base url is null or empty");
+
+ if (instance == null ||
+ !instance.baseUrl.equals(baseUrl) ||
+ !instance.access.equals(access)) {
+ instance = new DefaultVtnServiceApi(baseUrl, access);
+ }
+ return instance;
+ }
+
+ @Override
+ public Set<String> services() {
+ String response = restGet(EMPTY_STRING);
+ log.trace("Get services {}", response);
+
+ ObjectMapper mapper = new ObjectMapper();
+ try {
+ JsonNode nodes = mapper.readTree(response);
+ return Sets.newHashSet(nodes.fieldNames());
+ } catch (IOException e) {
+ log.warn("Failed to get service list");
+ return Sets.newHashSet();
+ }
+ }
+
+ @Override
+ public Set<String> getProviderServices(String tServiceId) {
+ checkNotNull(tServiceId);
+
+ String response = restGet(tServiceId);
+ log.trace("Get provider services {}", response);
+
+ ObjectMapper mapper = new ObjectMapper();
+ Set<String> pServices = Sets.newHashSet();
+
+ try {
+ JsonNode nodes = mapper.readTree(response);
+ nodes.forEach(node -> pServices.add(node.asText()));
+ } catch (IOException e) {
+ log.warn("Failed to get service dependency");
+ }
+ return pServices;
+ }
+
+ @Override
+ public Set<String> getTenantServices(String tServiceId) {
+ checkNotNull(tServiceId);
+
+ String response = restGet(EMPTY_STRING);
+ log.trace("Get tenant services {}", response);
+
+ ObjectMapper mapper = new ObjectMapper();
+ Set<String> tServices = Sets.newHashSet();
+ try {
+ JsonNode nodes = mapper.readTree(response);
+ Iterator<Map.Entry<String, JsonNode>> iterator = nodes.fields();
+
+ while (iterator.hasNext()) {
+ Map.Entry<String, JsonNode> entry = iterator.next();
+ entry.getValue().forEach(pService -> {
+ if (pService.asText().equals(tServiceId)) {
+ tServices.add(entry.getKey());
+ }
+ });
+ }
+ } catch (IOException e) {
+ log.warn("Failed to get service list");
+ }
+ return tServices;
+ }
+}