2 * ========================LICENSE_START=================================
5 * Copyright (C) 2020 Nordix Foundation
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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===================================
21 package org.oransc.policyagent.clients;
23 import com.google.gson.FieldNamingPolicy;
24 import com.google.gson.GsonBuilder;
26 import java.lang.invoke.MethodHandles;
27 import java.nio.charset.StandardCharsets;
28 import java.util.Arrays;
29 import java.util.List;
30 import java.util.Optional;
32 import org.immutables.value.Value;
33 import org.json.JSONObject;
34 import org.oransc.policyagent.configuration.ControllerConfig;
35 import org.oransc.policyagent.configuration.RicConfig;
36 import org.oransc.policyagent.repository.Policy;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
39 import org.springframework.http.HttpStatus;
40 import org.springframework.web.reactive.function.client.WebClientResponseException;
42 import reactor.core.publisher.Flux;
43 import reactor.core.publisher.Mono;
46 * Client for accessing the A1 adapter in the SDNC controller in OSC.
48 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
49 public class SdncOscA1Client implements A1Client {
52 @org.immutables.gson.Gson.TypeAdapters
53 public interface AdapterRequest {
54 public String nearRtRicUrl();
56 public Optional<String> body();
60 @org.immutables.gson.Gson.TypeAdapters
61 public interface AdapterOutput {
62 public Optional<String> body();
64 public int httpStatus();
67 static com.google.gson.Gson gson = new GsonBuilder() //
68 .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_DASHES) //
71 private static final String GET_POLICY_RPC = "getA1Policy";
72 private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
73 private final ControllerConfig controllerConfig;
74 private final AsyncRestClient restClient;
75 private final RicConfig ricConfig;
76 private final A1ProtocolType protocolType;
81 * @param protocolType the southbound protocol of the controller. Supported
82 * protocols are SDNC_OSC_STD_V1_1 and SDNC_OSC_OSC_V1
84 * @param controllerBaseUrl the base URL of the SDNC controller
85 * @param username username to accesss the SDNC controller
86 * @param password password to accesss the SDNC controller
88 public SdncOscA1Client(A1ProtocolType protocolType, RicConfig ricConfig, ControllerConfig controllerConfig) {
89 this(protocolType, ricConfig, controllerConfig,
90 new AsyncRestClient(controllerConfig.baseUrl() + "/restconf/operations"));
91 logger.debug("SdncOscA1Client for ric: {}, a1Controller: {}", ricConfig.name(), controllerConfig);
94 public SdncOscA1Client(A1ProtocolType protocolType, RicConfig ricConfig, ControllerConfig controllerConfig,
95 AsyncRestClient restClient) {
96 this.restClient = restClient;
97 this.ricConfig = ricConfig;
98 this.protocolType = protocolType;
99 this.controllerConfig = controllerConfig;
103 public Mono<List<String>> getPolicyTypeIdentities() {
104 if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
105 return Mono.just(Arrays.asList(""));
106 } else if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
107 OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
108 final String ricUrl = uri.createPolicyTypesUri();
109 return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
110 .flatMapMany(SdncJsonHelper::parseJsonArrayOfString) //
113 return Mono.error(createIllegalProtocolException());
118 private Exception createIllegalProtocolException() {
119 return new NullPointerException("Bug, unhandeled protocoltype: " + this.protocolType);
123 public Mono<List<String>> getPolicyIdentities() {
124 return getPolicyIds() //
129 public Mono<String> getPolicyTypeSchema(String policyTypeId) {
130 if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
131 return Mono.just("{}");
132 } else if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
133 OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
134 final String ricUrl = uri.createGetSchemaUri(policyTypeId);
135 return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
136 .flatMap(response -> OscA1Client.extractCreateSchema(response, policyTypeId));
138 return Mono.error(createIllegalProtocolException());
143 public Mono<String> putPolicy(Policy policy) {
144 return getUriBuilder() //
145 .flatMap(builder -> {
146 String ricUrl = builder.createPutPolicyUri(policy.type().name(), policy.id());
147 return post("putA1Policy", ricUrl, Optional.of(policy.json()));
152 public Mono<String> deletePolicy(Policy policy) {
153 return deletePolicyById(policy.type().name(), policy.id());
157 public Flux<String> deleteAllPolicies() {
158 if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
159 return getPolicyIds() //
160 .flatMap(policyId -> deletePolicyById("", policyId)); //
161 } else if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
162 OscA1Client.UriBuilder uriBuilder = new OscA1Client.UriBuilder(ricConfig);
163 return getPolicyTypeIdentities() //
164 .flatMapMany(Flux::fromIterable)
165 .flatMap(type -> post(GET_POLICY_RPC, uriBuilder.createGetPolicyIdsUri(type), Optional.empty())) //
166 .flatMap(SdncJsonHelper::parseJsonArrayOfString);
168 return Flux.error(createIllegalProtocolException());
173 public Mono<A1ProtocolType> getProtocolVersion() {
174 return tryStdProtocolVersion() //
175 .onErrorResume(t -> tryOscProtocolVersion());
179 public Mono<String> getPolicyStatus(Policy policy) {
180 return getUriBuilder() //
181 .flatMap(builder -> {
182 String ricUrl = builder.createGetPolicyStatusUri(policy.type().name(), policy.id());
183 return post("getA1PolicyStatus", ricUrl, Optional.empty());
187 private Mono<A1UriBuilder> getUriBuilder() {
188 if (protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
189 return Mono.just(new StdA1ClientVersion1.UriBuilder(ricConfig));
190 } else if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
191 return Mono.just(new OscA1Client.UriBuilder(ricConfig));
193 return Mono.error(createIllegalProtocolException());
197 private Mono<A1ProtocolType> tryOscProtocolVersion() {
198 OscA1Client.UriBuilder oscApiuriBuilder = new OscA1Client.UriBuilder(ricConfig);
199 return post(GET_POLICY_RPC, oscApiuriBuilder.createHealtcheckUri(), Optional.empty()) //
200 .flatMap(x -> Mono.just(A1ProtocolType.SDNC_OSC_OSC_V1));
203 private Mono<A1ProtocolType> tryStdProtocolVersion() {
204 StdA1ClientVersion1.UriBuilder uriBuilder = new StdA1ClientVersion1.UriBuilder(ricConfig);
205 return post(GET_POLICY_RPC, uriBuilder.createGetPolicyIdsUri(), Optional.empty()) //
206 .flatMap(x -> Mono.just(A1ProtocolType.SDNC_OSC_STD_V1_1));
209 private Flux<String> getPolicyIds() {
210 if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
211 StdA1ClientVersion1.UriBuilder uri = new StdA1ClientVersion1.UriBuilder(ricConfig);
212 final String ricUrl = uri.createGetPolicyIdsUri();
213 return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
214 .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
215 } else if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
216 OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
217 return getPolicyTypeIdentities() //
218 .flatMapMany(Flux::fromIterable)
219 .flatMap(type -> post(GET_POLICY_RPC, uri.createGetPolicyIdsUri(type), Optional.empty())) //
220 .flatMap(SdncJsonHelper::parseJsonArrayOfString);
222 return Flux.error(createIllegalProtocolException());
226 private Mono<String> deletePolicyById(String type, String policyId) {
227 return getUriBuilder() //
228 .flatMap(builder -> {
229 String ricUrl = builder.createDeleteUri(type, policyId);
230 return post("deleteA1Policy", ricUrl, Optional.empty());
234 private Mono<String> post(String rpcName, String ricUrl, Optional<String> body) {
235 AdapterRequest inputParams = ImmutableAdapterRequest.builder() //
236 .nearRtRicUrl(ricUrl) //
239 final String inputJsonString = SdncJsonHelper.createInputJsonString(inputParams);
240 logger.debug("POST inputJsonString = {}", inputJsonString);
243 .postWithAuthHeader(controllerUrl(rpcName), inputJsonString, this.controllerConfig.userName(),
244 this.controllerConfig.password()) //
245 .flatMap(this::extractResponseBody);
248 private Mono<String> extractResponse(JSONObject responseOutput) {
249 AdapterOutput output = gson.fromJson(responseOutput.toString(), ImmutableAdapterOutput.class);
250 Optional<String> optionalBody = output.body();
251 String body = optionalBody.isPresent() ? optionalBody.get() : "";
252 if (HttpStatus.valueOf(output.httpStatus()).is2xxSuccessful()) {
253 return Mono.just(body);
255 logger.debug("Error response: {} {}", output.httpStatus(), body);
256 byte[] responseBodyBytes = body.getBytes(StandardCharsets.UTF_8);
257 WebClientResponseException e = new WebClientResponseException(output.httpStatus(), "statusText", null,
258 responseBodyBytes, StandardCharsets.UTF_8, null);
260 return Mono.error(e);
264 private Mono<String> extractResponseBody(String responseStr) {
265 return SdncJsonHelper.getOutput(responseStr) //
266 .flatMap(this::extractResponse);
269 private String controllerUrl(String rpcName) {
270 return "/A1-ADAPTER-API:" + rpcName;