policy-agent/src/main/java/org/oransc/policyagent/clients/OscA1Client.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2020 Nordix Foundation
   6  * %%
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ========================LICENSE_END===================================
  19  */
  20
  21 package org.oransc.policyagent.clients;
  22
  23 import java.lang.invoke.MethodHandles;
  24 import java.util.List;
  25 import org.json.JSONObject;
  26 import org.oransc.policyagent.configuration.RicConfig;
  27 import org.oransc.policyagent.repository.Policy;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30 import org.springframework.web.util.UriComponentsBuilder;
  31 import reactor.core.publisher.Flux;
  32 import reactor.core.publisher.Mono;
  33
  34 public class OscA1Client implements A1Client {
  35     private static final String URL_PREFIX = "/a1-p";
  36
  37     private static final String POLICY_TYPES = "/policytypes";
  38     private static final String CREATE_SCHEMA = "create_schema";
  39     private static final String TITLE = "title";
  40
  41     private static final String HEALTHCHECK = "/healthcheck";
  42
  43     private static final UriComponentsBuilder POLICY_TYPE_SCHEMA_URI =
  44         UriComponentsBuilder.fromPath("/policytypes/{policy-type-name}");
  45
  46     private static final UriComponentsBuilder POLICY_URI =
  47         UriComponentsBuilder.fromPath("/policytypes/{policy-type-name}/policies/{policy-id}");
  48
  49     private static final UriComponentsBuilder POLICY_IDS_URI =
  50         UriComponentsBuilder.fromPath("/policytypes/{policy-type-name}/policies");
  51
  52     private static final UriComponentsBuilder POLICY_STATUS_URI =
  53         UriComponentsBuilder.fromPath("/policytypes/{policy-type-name}/policies/{policy-id}/status");
  54
  55     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  56
  57     private final AsyncRestClient restClient;
  58
  59     public OscA1Client(RicConfig ricConfig) {
  60         String baseUrl = ricConfig.baseUrl() + URL_PREFIX;
  61         this.restClient = new AsyncRestClient(baseUrl);
  62         if (logger.isDebugEnabled()) {
  63             logger.debug("OscA1Client for ric: {}", ricConfig.name());
  64         }
  65     }
  66
  67     public OscA1Client(AsyncRestClient restClient) {
  68         this.restClient = restClient;
  69     }
  70
  71     @Override
  72     public Mono<List<String>> getPolicyTypeIdentities() {
  73         return getPolicyTypeIds() //
  74             .collectList();
  75     }
  76
  77     @Override
  78     public Mono<List<String>> getPolicyIdentities() {
  79         return getPolicyTypeIds() //
  80             .flatMap(this::getPolicyIdentitiesByType) //
  81             .collectList();
  82     }
  83
  84     @Override
  85     public Mono<String> getPolicyTypeSchema(String policyTypeId) {
  86         String uri = POLICY_TYPE_SCHEMA_URI.buildAndExpand(policyTypeId).toUriString();
  87         return restClient.get(uri) //
  88             .flatMap(response -> getCreateSchema(response, policyTypeId));
  89     }
  90
  91     @Override
  92     public Mono<String> putPolicy(Policy policy) {
  93         String uri = POLICY_URI.buildAndExpand(policy.type().name(), policy.id()).toUriString();
  94         return restClient.put(uri, policy.json());
  95     }
  96
  97     @Override
  98     public Mono<String> deletePolicy(Policy policy) {
  99         return deletePolicyById(policy.type().name(), policy.id());
 100     }
 101
 102     @Override
 103     public Mono<A1ProtocolType> getProtocolVersion() {
 104         return restClient.get(HEALTHCHECK) //
 105             .flatMap(notUsed -> Mono.just(A1ProtocolType.OSC_V1));
 106     }
 107
 108     @Override
 109     public Flux<String> deleteAllPolicies() {
 110         return getPolicyTypeIds() //
 111             .flatMap(this::deletePoliciesForType);
 112     }
 113
 114     @Override
 115     public Mono<String> getPolicyStatus(Policy policy) {
 116         String uri = POLICY_STATUS_URI.buildAndExpand(policy.type().name(), policy.id()).toUriString();
 117         return restClient.get(uri);
 118
 119     }
 120
 121     private Flux<String> getPolicyTypeIds() {
 122         return restClient.get(POLICY_TYPES) //
 123             .flatMapMany(JsonHelper::parseJsonArrayOfString);
 124     }
 125
 126     private Flux<String> getPolicyIdentitiesByType(String typeId) {
 127         return restClient.get(POLICY_IDS_URI.buildAndExpand(typeId).toUriString()) //
 128             .flatMapMany(JsonHelper::parseJsonArrayOfString);
 129     }
 130
 131     private Mono<String> getCreateSchema(String policyTypeResponse, String policyTypeId) {
 132         try {
 133             JSONObject obj = new JSONObject(policyTypeResponse);
 134             JSONObject schemaObj = obj.getJSONObject(CREATE_SCHEMA);
 135             schemaObj.put(TITLE, policyTypeId);
 136             return Mono.just(schemaObj.toString());
 137         } catch (Exception e) {
 138             logger.error("Unexcpected response for policy type: {}", policyTypeResponse, e);
 139             return Mono.error(e);
 140         }
 141     }
 142
 143     private Mono<String> deletePolicyById(String typeId, String policyId) {
 144         String uri = POLICY_URI.buildAndExpand(typeId, policyId).toUriString();
 145         return restClient.delete(uri);
 146     }
 147
 148     private Flux<String> deletePoliciesForType(String typeId) {
 149         return getPolicyIdentitiesByType(typeId) //
 150             .flatMap(policyId -> deletePolicyById(typeId, policyId));
 151     }
 152 }