X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=policy-agent%2Fsrc%2Fmain%2Fjava%2Forg%2Foransc%2Fpolicyagent%2Fclients%2FOscA1Client.java;h=a388267e344dbe362e4446591262c09bfbdbc016;hb=6a39814272307d0207222c9229b0d765ac062bf0;hp=5c18103de2aa4570ff980c6c9cb87f94787266e9;hpb=1b8d76de3262675c5afe45351929b0d5d2c0bab1;p=nonrtric.git

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/clients/OscA1Client.java b/policy-agent/src/main/java/org/oransc/policyagent/clients/OscA1Client.java
index 5c18103d..a388267e 100644
--- a/policy-agent/src/main/java/org/oransc/policyagent/clients/OscA1Client.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/clients/OscA1Client.java
@@ -2,7 +2,7 @@
  * ========================LICENSE_START=================================
  * O-RAN-SC
  * %%
- * Copyright (C) 2019 Nordix Foundation
+ * Copyright (C) 2020 Nordix Foundation
  * %%
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,13 +21,11 @@
 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.configuration.WebClientConfig;
 import org.oransc.policyagent.repository.Policy;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -35,106 +33,181 @@ import org.slf4j.LoggerFactory;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
+/**
+ * Client for accessing OSC A1 REST API
+ */
+@SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
 public class OscA1Client implements A1Client {
-    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+    static final int CONCURRENCY_RIC = 1; // How may paralell requests that is sent to one NearRT RIC
 
-    private final AsyncRestClient restClient;
+    public static class UriBuilder implements A1UriBuilder {
+        private final RicConfig ricConfig;
 
-    public OscA1Client(RicConfig ricConfig) {
-        String baseUrl = ricConfig.baseUrl() + "/a1-p";
-        this.restClient = new AsyncRestClient(baseUrl);
-        logger.debug("OscA1Client for ric: {}", ricConfig.name());
-    }
+        public UriBuilder(RicConfig ricConfig) {
+            this.ricConfig = ricConfig;
+        }
 
-    @Override
-    public Mono<List<String>> getPolicyTypeIdentities() {
-        return restClient.get("/policytypes") //
-            .flatMap(this::parseJsonArrayOfString);
-    }
+        @Override
+        public String createPutPolicyUri(String type, String policyId) {
+            return createPolicyUri(type, policyId);
+        }
 
-    @Override
-    public Mono<List<String>> getPolicyIdentities() {
-        return getPolicyTypeIdentities() //
-            .flatMapMany(types -> Flux.fromIterable(types)) //
-            .flatMap(type -> getPolicyIdentities(type)) //
-            .flatMap(policyIds -> Flux.fromIterable(policyIds)) //
-            .collectList();
+        /**
+         * /a1-p/policytypes/{policy_type_id}/policies
+         */
+        public String createGetPolicyIdsUri(String type) {
+            return createPolicyTypeUri(type) + "/policies";
+        }
+
+        @Override
+        public String createDeleteUri(String type, String policyId) {
+            return createPolicyUri(type, policyId);
+        }
+
+        /**
+         * ​/a1-p​/policytypes​/{policy_type_id}​/policies​/{policy_instance_id}​/status
+         */
+        @Override
+        public String createGetPolicyStatusUri(String type, String policyId) {
+            return createPolicyUri(type, policyId) + "/status";
+        }
+
+        /**
+         * ​/a1-p​/healthcheck
+         */
+        public String createHealtcheckUri() {
+            return baseUri() + "/healthcheck";
+        }
+
+        /**
+         * /a1-p/policytypes/{policy_type_id}
+         */
+        public String createGetSchemaUri(String type) {
+            return this.createPolicyTypeUri(type);
+        }
+
+        /**
+         * ​/a1-p​/policytypes​/{policy_type_id}
+         */
+        public String createPolicyTypesUri() {
+            return baseUri() + "/policytypes";
+        }
+
+        /**
+         * ​/a1-p​/policytypes​/{policy_type_id}​/policies​/{policy_instance_id}
+         */
+        private String createPolicyUri(String type, String id) {
+            return createPolicyTypeUri(type) + "/policies/" + id;
+        }
+
+        /**
+         * /a1-p/policytypes/{policy_type_id}
+         */
+        private String createPolicyTypeUri(String type) {
+            return createPolicyTypesUri() + "/" + type;
+        }
+
+        private String baseUri() {
+            return ricConfig.baseUrl() + "/a1-p";
+        }
     }
 
-    private Mono<List<String>> getPolicyIdentities(String typeId) {
-        return restClient.get("/policytypes/" + typeId + "/policies") //
-            .flatMap(this::parseJsonArrayOfString);
+    private static final String TITLE = "title";
+    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+    private final AsyncRestClient restClient;
+    private final UriBuilder uri;
+
+    public OscA1Client(RicConfig ricConfig, WebClientConfig clientConfig) {
+        this(ricConfig, new AsyncRestClient("", clientConfig));
     }
 
-    @Override
-    public Mono<String> getPolicyTypeSchema(String policyTypeId) {
-        return restClient.get("/policytypes/" + policyTypeId) //
-            .flatMap(response -> getCreateSchema(response, policyTypeId));
+    public OscA1Client(RicConfig ricConfig, AsyncRestClient restClient) {
+        this.restClient = restClient;
+        logger.debug("OscA1Client for ric: {}", ricConfig.name());
+
+        uri = new UriBuilder(ricConfig);
     }
 
-    private Mono<String> getCreateSchema(String policyTypeResponse, String policyTypeId) {
+    public static Mono<String> extractCreateSchema(String policyTypeResponse, String policyTypeId) {
         try {
             JSONObject obj = new JSONObject(policyTypeResponse);
             JSONObject schemaObj = obj.getJSONObject("create_schema");
-            schemaObj.put("title", policyTypeId);
+            schemaObj.put(TITLE, policyTypeId);
             return Mono.just(schemaObj.toString());
         } catch (Exception e) {
-            logger.error("Unexcpected response for policy type: {}", policyTypeResponse, e);
+            String exceptionString = e.toString();
+            logger.error("Unexpected response for policy type: {}, exception: {}", policyTypeResponse, exceptionString);
             return Mono.error(e);
         }
     }
 
     @Override
-    public Mono<String> putPolicy(Policy policy) {
-        return restClient.put("/policytypes/" + policy.type().name() + "/policies/" + policy.id(), policy.json());
+    public Mono<List<String>> getPolicyTypeIdentities() {
+        return getPolicyTypeIds() //
+            .collectList();
     }
 
     @Override
-    public Mono<String> deletePolicy(Policy policy) {
-        return deletePolicy(policy.type().name(), policy.id());
+    public Mono<List<String>> getPolicyIdentities() {
+        return getPolicyTypeIds() //
+            .flatMap(this::getPolicyIdentitiesByType) //
+            .collectList();
     }
 
-    private Mono<String> deletePolicy(String typeId, String policyId) {
-        return restClient.delete("/policytypes/" + typeId + "/policies/" + policyId);
+    @Override
+    public Mono<String> getPolicyTypeSchema(String policyTypeId) {
+        String schemaUri = uri.createGetSchemaUri(policyTypeId);
+        return restClient.get(schemaUri) //
+            .flatMap(response -> extractCreateSchema(response, policyTypeId));
     }
 
     @Override
-    public Mono<A1ProtocolType> getProtocolVersion() {
-        return restClient.get("/healthcheck") //
-            .flatMap(resp -> Mono.just(A1ProtocolType.OSC_V1));
+    public Mono<String> putPolicy(Policy policy) {
+        String policyUri = this.uri.createPutPolicyUri(policy.type().name(), policy.id());
+        return restClient.put(policyUri, policy.json());
     }
 
     @Override
-    public Flux<String> deleteAllPolicies() {
-        return getPolicyTypeIdentities() //
-            .flatMapMany(types -> Flux.fromIterable(types)) //
-            .flatMap(typeId -> deletePoliciesForType(typeId)); //
+    public Mono<String> deletePolicy(Policy policy) {
+        return deletePolicyById(policy.type().name(), policy.id());
     }
 
-    private Flux<String> deletePoliciesForType(String typeId) {
-        return getPolicyIdentities(typeId) //
-            .flatMapMany(policyIds -> Flux.fromIterable(policyIds)) //
-            .flatMap(policyId -> deletePolicy(typeId, policyId)); //
+    @Override
+    public Mono<A1ProtocolType> getProtocolVersion() {
+        return restClient.get(uri.createHealtcheckUri()) //
+            .flatMap(notUsed -> Mono.just(A1ProtocolType.OSC_V1));
     }
 
-    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);
-        }
+    @Override
+    public Flux<String> deleteAllPolicies() {
+        return getPolicyTypeIds() //
+            .flatMap(this::deletePoliciesForType, CONCURRENCY_RIC);
     }
 
     @Override
     public Mono<String> getPolicyStatus(Policy policy) {
-        // /a1-p/policytypes/{policy_type_id}/policies/{policy_instance_id}/status
-        return restClient.get("/policytypes/" + policy.type().name() + "/policies/" + policy.id() + "/status");
+        String statusUri = uri.createGetPolicyStatusUri(policy.type().name(), policy.id());
+        return restClient.get(statusUri);
+
+    }
+
+    private Flux<String> getPolicyTypeIds() {
+        return restClient.get(uri.createPolicyTypesUri()) //
+            .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
+    }
+
+    private Flux<String> getPolicyIdentitiesByType(String typeId) {
+        return restClient.get(uri.createGetPolicyIdsUri(typeId)) //
+            .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
+    }
+
+    private Mono<String> deletePolicyById(String typeId, String policyId) {
+        String policyUri = uri.createDeleteUri(typeId, policyId);
+        return restClient.delete(policyUri);
+    }
 
+    private Flux<String> deletePoliciesForType(String typeId) {
+        return getPolicyIdentitiesByType(typeId) //
+            .flatMap(policyId -> deletePolicyById(typeId, policyId), CONCURRENCY_RIC);
     }
 }