gerrit.onap Code Review - policy/clamp.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021,2023 Nordix Foundation.
   4  * ================================================================================
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *      http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  * SPDX-License-Identifier: Apache-2.0
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.policy.clamp.acm.participant.http.main.webclient;
  22
  23 import java.lang.invoke.MethodHandles;
  24 import java.time.Duration;
  25 import java.util.Map;
  26 import java.util.Objects;
  27 import org.apache.commons.lang3.tuple.ImmutablePair;
  28 import org.apache.commons.lang3.tuple.Pair;
  29 import org.onap.policy.clamp.acm.participant.http.main.exception.HttpWebClientException;
  30 import org.onap.policy.clamp.acm.participant.http.main.models.ConfigRequest;
  31 import org.onap.policy.clamp.acm.participant.http.main.models.ConfigurationEntity;
  32 import org.onap.policy.clamp.acm.participant.http.main.models.RestParams;
  33 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36 import org.springframework.http.HttpHeaders;
  37 import org.springframework.http.HttpMethod;
  38 import org.springframework.stereotype.Component;
  39 import org.springframework.web.reactive.function.BodyInserters;
  40 import org.springframework.web.reactive.function.client.WebClient;
  41 import org.springframework.web.util.UriComponentsBuilder;
  42 import reactor.core.publisher.Mono;
  43
  44 @Component
  45 public class AcHttpClient {
  46
  47     private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  48
  49     /**
  50      * Runnable to execute http requests.
  51      */
  52     public void run(ConfigRequest configRequest, Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap) {
  53
  54         var webClient = WebClient.builder().baseUrl(configRequest.getBaseUrl())
  55                 .defaultHeaders(httpHeaders -> httpHeaders.addAll(createHeaders(configRequest))).build();
  56
  57         for (var configurationEntity : configRequest.getConfigurationEntities()) {
  58             LOGGER.info("Executing http requests for the config entity {}",
  59                     configurationEntity.getConfigurationEntityId());
  60
  61             executeRequest(webClient, configRequest, configurationEntity, responseMap);
  62         }
  63     }
  64
  65     private void executeRequest(WebClient client, ConfigRequest configRequest, ConfigurationEntity configurationEntity,
  66             Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap) {
  67
  68         // Iterate the sequence of http requests
  69         for (var request : configurationEntity.getRestSequence()) {
  70             try {
  71                 var httpMethod = Objects.requireNonNull(HttpMethod.resolve(request.getHttpMethod()));
  72                 var uri = createUriString(request);
  73                 LOGGER.info("Executing HTTP request: {} for the Rest request id: {}", httpMethod,
  74                         request.getRestRequestId());
  75
  76                 var response = client.method(httpMethod).uri(uri)
  77                         .body(request.getBody() == null ? BodyInserters.empty()
  78                                 : BodyInserters.fromValue(request.getBody()))
  79                         .exchangeToMono(
  80                                 clientResponse -> clientResponse.statusCode().value() == request.getExpectedResponse()
  81                                         ? clientResponse.bodyToMono(String.class)
  82                                         : Mono.error(new HttpWebClientException(clientResponse.statusCode().value(),
  83                                                 clientResponse.bodyToMono(String.class).toString())))
  84                         .block(Duration.ofMillis(configRequest.getUninitializedToPassiveTimeout() * 1000L));
  85
  86                 LOGGER.info("HTTP response for the {} request : {}", httpMethod, response);
  87                 responseMap.put(request.getRestRequestId(),
  88                         new ImmutablePair<>(request.getExpectedResponse(), response));
  89
  90             } catch (HttpWebClientException ex) {
  91                 LOGGER.error("Error occurred on the HTTP request ", ex);
  92                 responseMap.put(request.getRestRequestId(),
  93                         new ImmutablePair<>(ex.getStatusCode().value(), ex.getResponseBodyAsString()));
  94             }
  95         }
  96     }
  97
  98     private HttpHeaders createHeaders(ConfigRequest request) {
  99         var headers = new HttpHeaders();
 100         for (var entry : request.getHttpHeaders().entrySet()) {
 101             headers.add(entry.getKey(), entry.getValue());
 102         }
 103         return headers;
 104     }
 105
 106     private String createUriString(RestParams restParams) {
 107         var uriComponentsBuilder = UriComponentsBuilder.fromUriString(restParams.getPath());
 108         // Add path params if present
 109         if (restParams.getPathParams() != null) {
 110             uriComponentsBuilder.uriVariables(restParams.getPathParams());
 111         }
 112         // Add query params if present
 113         if (restParams.getQueryParams() != null) {
 114             for (var entry : restParams.getQueryParams().entrySet()) {
 115                 uriComponentsBuilder.queryParam(entry.getKey(), entry.getValue());
 116             }
 117         }
 118         return uriComponentsBuilder.build().toUriString();
 119     }
 120
 121 }