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

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2021 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.controlloop.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.controlloop.participant.http.main.exception.HttpWebClientException;
  30 import org.onap.policy.clamp.controlloop.participant.http.main.models.ConfigRequest;
  31 import org.onap.policy.clamp.controlloop.participant.http.main.models.ConfigurationEntity;
  32 import org.onap.policy.clamp.controlloop.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.web.reactive.function.BodyInserters;
  39 import org.springframework.web.reactive.function.client.WebClient;
  40 import org.springframework.web.util.UriComponentsBuilder;
  41 import reactor.core.publisher.Mono;
  42
  43 public class ClHttpClient implements Runnable {
  44
  45     private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  46
  47     private final ConfigRequest configRequest;
  48
  49     private Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap;
  50
  51     /**
  52      * Constructor.
  53      */
  54     public ClHttpClient(ConfigRequest configRequest, Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap) {
  55         this.configRequest = configRequest;
  56         this.responseMap = responseMap;
  57     }
  58
  59     /**
  60      * Runnable to execute http requests.
  61      */
  62     @Override
  63     public void run() {
  64
  65         var webClient = WebClient.builder()
  66             .baseUrl(configRequest.getBaseUrl())
  67             .defaultHeaders(httpHeaders -> httpHeaders.addAll(createHeaders(configRequest)))
  68             .build();
  69
  70         for (ConfigurationEntity configurationEntity : configRequest.getConfigurationEntities()) {
  71             LOGGER.info("Executing http requests for the config entity {}",
  72                 configurationEntity.getConfigurationEntityId());
  73
  74             executeRequest(webClient, configurationEntity);
  75         }
  76     }
  77
  78     private void executeRequest(WebClient client, ConfigurationEntity configurationEntity)  {
  79
  80         // Iterate the sequence of http requests
  81         for (RestParams request: configurationEntity.getRestSequence()) {
  82             String response = null;
  83             try {
  84                 var httpMethod = Objects.requireNonNull(HttpMethod.resolve(request.getHttpMethod()));
  85                 var uri = createUriString(request);
  86                 LOGGER.info("Executing HTTP request: {} for the Rest request id: {}", httpMethod,
  87                         request.getRestRequestId());
  88
  89                 response = client.method(httpMethod)
  90                     .uri(uri)
  91                     .body(request.getBody() == null ? BodyInserters.empty()
  92                         : BodyInserters.fromValue(request.getBody()))
  93                     .exchangeToMono(clientResponse ->
  94                         clientResponse.statusCode().value() == request.getExpectedResponse()
  95                             ? clientResponse.bodyToMono(String.class)
  96                             : Mono.error(new HttpWebClientException(clientResponse.statusCode().value(),
  97                                 clientResponse.bodyToMono(String.class).toString())))
  98                     .block(Duration.ofMillis(configRequest.getUninitializedToPassiveTimeout() * 1000L));
  99
 100                 LOGGER.info("HTTP response for the {} request : {}", httpMethod, response);
 101                 responseMap.put(request.getRestRequestId(), new ImmutablePair<>(request.getExpectedResponse(),
 102                     response));
 103
 104             } catch (HttpWebClientException ex) {
 105                 LOGGER.error("Error occurred on the HTTP request ", ex);
 106                 responseMap.put(request.getRestRequestId(), new ImmutablePair<>(ex.getStatusCode().value(),
 107                      ex.getResponseBodyAsString()));
 108             }
 109         }
 110     }
 111
 112     private HttpHeaders createHeaders(ConfigRequest request) {
 113         var headers = new HttpHeaders();
 114         for (Map.Entry<String, String> entry: request.getHttpHeaders().entrySet()) {
 115             headers.add(entry.getKey(), entry.getValue());
 116         }
 117         return headers;
 118     }
 119
 120     private String createUriString(RestParams restParams) {
 121         var uriComponentsBuilder = UriComponentsBuilder.fromUriString(restParams.getPath());
 122         // Add path params if present
 123         if (restParams.getPathParams() != null) {
 124             uriComponentsBuilder.uriVariables(restParams.getPathParams());
 125         }
 126         // Add query params if present
 127         if (restParams.getQueryParams() != null) {
 128             for (Map.Entry<String, String> entry : restParams.getQueryParams().entrySet()) {
 129                 uriComponentsBuilder.queryParam(entry.getKey(), entry.getValue());
 130             }
 131         }
 132         return uriComponentsBuilder.build().toUriString();
 133     }
 134
 135 }