Infrastructure for having mutiple RIC APIs

[nonrtric.git] / policy-agent / src / main / java / org / oransc / policyagent / clients / StdA1Client.java

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/clients/StdA1Client.java b/policy-agent/src/main/java/org/oransc/policyagent/clients/StdA1Client.java
new file mode 100644 (file)
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--- /dev/null
+++ b/policy-agent/src/main/java/org/oransc/policyagent/clients/StdA1Client.java
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+/*-
+ * ========================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.Collection;
+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.Mono;
+
+public class StdA1Client implements A1Client {
+    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+    private final RicConfig ricConfig;
+    private final AsyncRestClient restClient;
+
+    public StdA1Client(RicConfig ricConfig) {
+        this.ricConfig = ricConfig;
+        this.restClient = new AsyncRestClient(getBaseUrl());
+    }
+
+    public StdA1Client(RicConfig ricConfig, AsyncRestClient restClient) {
+        this.ricConfig = ricConfig;
+        this.restClient = restClient;
+    }
+
+    @Override
+    public Mono<Collection<String>> getPolicyTypeIdentities() {
+        logger.debug("getPolicyTypeIdentities nearRtRicUrl = {}", ricConfig.baseUrl());
+        return restClient.get("/policytypes/identities") //
+            .flatMap(this::parseJsonArrayOfString);
+    }
+
+    @Override
+    public Mono<Collection<String>> getPolicyIdentities() {
+        logger.debug("getPolicyIdentities nearRtRicUrl = {}", ricConfig.baseUrl());
+        return restClient.get("/policies/identities") //
+            .flatMap(this::parseJsonArrayOfString);
+    }
+
+    @Override
+    public Mono<String> getPolicyTypeSchema(String policyTypeId) {
+        logger.debug("getPolicyType nearRtRicUrl = {}, policyTypeId = {}", ricConfig.baseUrl(), policyTypeId);
+        Mono<String> response = restClient.get("/policytypes/" + policyTypeId);
+        return response.flatMap(this::createMono);
+    }
+
+    @Override
+    public Mono<String> putPolicy(Policy policy) {
+        logger.debug("putPolicy nearRtRicUrl = {}, policyId = {}, policyString = {}", //
+            policy.ric().getConfig().baseUrl(), policy.id(), policy.json());
+        // TODO update when simulator is updated to include policy type
+        // Mono<String> response = client.put("/policies/" + policy.id() + "?policyTypeId=" + policy.type().name(),
+        // policy.json());
+        Mono<String> response = restClient.put("/policies/" + policy.id(), policy.json());
+
+        return response.flatMap(this::createMono);
+    }
+
+    @Override
+    public Mono<String> deletePolicy(String policyId) {
+        logger.debug("deletePolicy nearRtRicUrl = {}, policyId = {}", ricConfig.baseUrl(), policyId);
+        return restClient.delete("/policies/" + policyId);
+    }
+
+    @Override
+    public Mono<A1ProtocolType> getProtocolVersion() {
+        return getPolicyTypeIdentities() //
+            .flatMap(x -> Mono.just(A1ProtocolType.STD_V1));
+    }
+
+    private String getBaseUrl() {
+        return ricConfig.baseUrl() + "/A1-P/v1";
+    }
+
+    private Mono<Collection<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);
+        }
+    }
+
+    private Mono<String> createMono(String inputString) {
+        try {
+            JSONObject jsonObject = new JSONObject(inputString);
+            String jsonString = jsonObject.toString();
+            logger.debug("A1 client: received string = {}", jsonString);
+            return Mono.just(jsonString);
+        } catch (JSONException ex) { // invalid json
+            return Mono.error(ex);
+        }
+    }
+
+}