+/*-
+ * ========================LICENSE_START=================================
+ * O-RAN-SC
+ * %%
+ * Copyright (C) 2019 Nordix 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.
+ * ========================LICENSE_END===================================
+ */
+
+package org.oransc.policyagent.clients;
+
+import java.lang.invoke.MethodHandles;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.oransc.policyagent.configuration.RicConfig;
+import org.oransc.policyagent.repository.Policy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+public class ControllerA1Client implements A1Client {
+ private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+ private static final String A1_CONTROLLER_URL =
+ "http://admin:Kp8bJ4SXszM0WXlhak3eHlcse2gAw84vaoGGmJvUy2U@a1-controller-container:8181/restconf/operations";
+
+ private final RicConfig ricConfig;
+ private final AsyncRestClient restClient;
+
+ public ControllerA1Client(RicConfig ricConfig) {
+ this.ricConfig = ricConfig;
+ this.restClient = new AsyncRestClient(A1_CONTROLLER_URL);
+ logger.debug("ControllerA1Client for ric: {}", this.ricConfig.name());
+ }
+
+ @Override
+ public Mono<List<String>> getPolicyTypeIdentities() {
+ JSONObject paramsJson = new JSONObject();
+ paramsJson.put("near-rt-ric-url", ricConfig.baseUrl());
+ String inputJsonString = createInputJsonString(paramsJson);
+ logger.debug("POST getPolicyTypeIdentities inputJsonString = {}", inputJsonString);
+
+ return restClient.post("/A1-ADAPTER-API:getPolicyTypeIdentities", inputJsonString) //
+ .flatMap(response -> getValueFromResponse(response, "policy-type-id-list")) //
+ .flatMap(this::parseJsonArrayOfString);
+ }
+
+ @Override
+ public Mono<List<String>> getPolicyIdentities() {
+ JSONObject paramsJson = new JSONObject();
+ paramsJson.put("near-rt-ric-url", ricConfig.baseUrl());
+ String inputJsonString = createInputJsonString(paramsJson);
+ logger.debug("POST getPolicyIdentities inputJsonString = {}", inputJsonString);
+
+ return restClient.post("/A1-ADAPTER-API:getPolicyIdentities", inputJsonString) //
+ .flatMap(response -> getValueFromResponse(response, "policy-id-list")) //
+ .flatMap(this::parseJsonArrayOfString);
+ }
+
+ @Override
+ public Mono<String> getPolicyTypeSchema(String policyTypeId) {
+ JSONObject paramsJson = new JSONObject();
+ paramsJson.put("near-rt-ric-url", ricConfig.baseUrl());
+ paramsJson.put("policy-type-id", policyTypeId);
+ String inputJsonString = createInputJsonString(paramsJson);
+ logger.debug("POST getPolicyType inputJsonString = {}", inputJsonString);
+
+ return restClient.post("/A1-ADAPTER-API:getPolicyType", inputJsonString) //
+ .flatMap(response -> getValueFromResponse(response, "policy-type"));
+ }
+
+ @Override
+ public Mono<String> putPolicy(Policy policy) {
+ JSONObject paramsJson = new JSONObject();
+ paramsJson.put("near-rt-ric-url", ricConfig.baseUrl());
+ paramsJson.put("policy-id", policy.id());
+ paramsJson.put("policy", policy.json());
+ String inputJsonString = createInputJsonString(paramsJson);
+ logger.debug("POST putPolicy inputJsonString = {}", inputJsonString);
+
+ return restClient.post("/A1-ADAPTER-API:putPolicy", inputJsonString) //
+ .flatMap(response -> getValueFromResponse(response, "returned-policy"));
+ }
+
+ @Override
+ public Mono<String> deletePolicy(Policy policy) {
+ return deletePolicy(policy.id());
+ }
+
+ @Override
+ public Flux<String> deleteAllPolicies() {
+ return getPolicyIdentities() //
+ .flatMapMany(policyIds -> Flux.fromIterable(policyIds)) // )
+ .flatMap(policyId -> deletePolicy(policyId)); //
+ }
+
+ public Mono<String> deletePolicy(String policyId) {
+ JSONObject paramsJson = new JSONObject();
+ paramsJson.put("near-rt-ric-url", ricConfig.baseUrl());
+ paramsJson.put("policy-id", policyId);
+ String inputJsonString = createInputJsonString(paramsJson);
+ logger.debug("POST deletePolicy inputJsonString = {}", inputJsonString);
+
+ return restClient.post("/A1-ADAPTER-API:deletePolicy", inputJsonString);
+ }
+
+ @Override
+ public Mono<A1ProtocolType> getProtocolVersion() {
+ return getPolicyTypeIdentities() //
+ .flatMap(x -> Mono.just(A1ProtocolType.CONTROLLER));
+ }
+
+ private String createInputJsonString(JSONObject paramsJson) {
+ JSONObject inputJson = new JSONObject();
+ inputJson.put("input", paramsJson);
+ return inputJson.toString();
+ }
+
+ private Mono<String> getValueFromResponse(String response, String key) {
+ logger.debug("A1 client: response = {}", response);
+ try {
+ JSONObject outputJson = new JSONObject(response);
+ JSONObject responseParams = outputJson.getJSONObject("output");
+ String value = responseParams.get(key).toString();
+ return Mono.just(value);
+ } catch (JSONException ex) { // invalid json
+ return Mono.error(ex);
+ }
+ }
+
+ private Mono<List<String>> parseJsonArrayOfString(String inputString) {
+ try {
+ List<String> arrayList = new ArrayList<>();
+ JSONArray jsonArray = new JSONArray(inputString);
+ for (int i = 0; i < jsonArray.length(); i++) {
+ arrayList.add(jsonArray.getString(i));
+ }
+ logger.debug("A1 client: received list = {}", arrayList);
+ return Mono.just(arrayList);
+ } catch (JSONException ex) { // invalid json
+ return Mono.error(ex);
+ }
+ }
+}