Add A1 controller client in policy-agent

[nonrtric.git] / policy-agent / src / main / java / org / oransc / policyagent / clients / ControllerA1Client.java

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/clients/ControllerA1Client.java b/policy-agent/src/main/java/org/oransc/policyagent/clients/ControllerA1Client.java
new file mode 100644 (file)
index 0000000..bc7b56d
--- /dev/null
+++ b/policy-agent/src/main/java/org/oransc/policyagent/clients/ControllerA1Client.java
@@ -0,0 +1,160 @@
+/*-
+ * ========================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);
+        }
+    }
+}