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.HashMap;
  26 import java.util.Map;
  27 import java.util.Objects;
  28 import org.apache.commons.lang3.tuple.ImmutablePair;
  29 import org.apache.commons.lang3.tuple.Pair;
  30 import org.onap.policy.clamp.acm.participant.http.main.exception.HttpWebClientException;
  31 import org.onap.policy.clamp.acm.participant.http.main.models.ConfigRequest;
  32 import org.onap.policy.clamp.acm.participant.http.main.models.ConfigurationEntity;
  33 import org.onap.policy.clamp.acm.participant.http.main.models.RestParams;
  34 import org.onap.policy.models.tosca.authorative.concepts.ToscaConceptIdentifier;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37 import org.springframework.http.HttpHeaders;
  38 import org.springframework.http.HttpMethod;
  39 import org.springframework.stereotype.Component;
  40 import org.springframework.web.reactive.function.BodyInserters;
  41 import org.springframework.web.reactive.function.client.WebClient;
  42 import org.springframework.web.reactive.function.client.WebClientRequestException;
  43 import org.springframework.web.util.UriComponentsBuilder;
  44 import reactor.core.publisher.Mono;
  45
  46 @Component
  47 public class AcHttpClient {
  48
  49     private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  50
  51     /**
  52      * Runnable to execute http requests.
  53      */
  54     public Map<ToscaConceptIdentifier, Pair<Integer, String>> run(ConfigRequest configRequest) {
  55
  56         var webClient = WebClient.builder().baseUrl(configRequest.getBaseUrl())
  57                 .defaultHeaders(httpHeaders -> httpHeaders.addAll(createHeaders(configRequest))).build();
  58
  59         Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap = new HashMap<>();
  60         for (var configurationEntity : configRequest.getConfigurationEntities()) {
  61             LOGGER.info("Executing http requests for the config entity {}",
  62                     configurationEntity.getConfigurationEntityId());
  63
  64             responseMap.putAll(executeRequest(webClient, configRequest, configurationEntity));
  65         }
  66         return responseMap;
  67     }
  68
  69     private Map<ToscaConceptIdentifier, Pair<Integer, String>> executeRequest(WebClient client,
  70             ConfigRequest configRequest, ConfigurationEntity configurationEntity) {
  71
  72         Map<ToscaConceptIdentifier, Pair<Integer, String>> responseMap = new HashMap<>();
  73         // Iterate the sequence of http requests
  74         for (var request : configurationEntity.getRestSequence()) {
  75             try {
  76                 var httpMethod = Objects.requireNonNull(HttpMethod.resolve(request.getHttpMethod()));
  77                 var uri = createUriString(request);
  78                 LOGGER.info("Executing HTTP request: {} for the Rest request id: {}", httpMethod,
  79                         request.getRestRequestId());
  80
  81                 var response = client.method(httpMethod).uri(uri)
  82                         .body(request.getBody() == null ? BodyInserters.empty()
  83                                 : BodyInserters.fromValue(request.getBody()))
  84                         .exchangeToMono(
  85                                 clientResponse -> clientResponse.statusCode().value() == request.getExpectedResponse()
  86                                         ? clientResponse.bodyToMono(String.class)
  87                                         : Mono.error(new HttpWebClientException(clientResponse.statusCode().value(),
  88                                                 clientResponse.bodyToMono(String.class).toString())))
  89                         .block(Duration.ofMillis(configRequest.getUninitializedToPassiveTimeout() * 1000L));
  90
  91                 LOGGER.info("HTTP response for the {} request : {}", httpMethod, response);
  92                 responseMap.put(request.getRestRequestId(),
  93                         new ImmutablePair<>(request.getExpectedResponse(), response));
  94
  95             } catch (HttpWebClientException ex) {
  96                 LOGGER.error("Error occurred on the HTTP response ", ex);
  97                 responseMap.put(request.getRestRequestId(),
  98                         new ImmutablePair<>(ex.getStatusCode().value(), ex.getResponseBodyAsString()));
  99             } catch (WebClientRequestException | IllegalStateException ex) {
 100                 LOGGER.error("Error occurred on the HTTP request ", ex);
 101                 responseMap.put(request.getRestRequestId(), new ImmutablePair<>(404, ex.getMessage()));
 102             }
 103         }
 104         return responseMap;
 105     }
 106
 107     private HttpHeaders createHeaders(ConfigRequest request) {
 108         var headers = new HttpHeaders();
 109         for (var entry : request.getHttpHeaders().entrySet()) {
 110             headers.add(entry.getKey(), entry.getValue());
 111         }
 112         return headers;
 113     }
 114
 115     private String createUriString(RestParams restParams) {
 116         var uriComponentsBuilder = UriComponentsBuilder.fromUriString(restParams.getPath());
 117         // Add path params if present
 118         if (restParams.getPathParams() != null) {
 119             uriComponentsBuilder.uriVariables(restParams.getPathParams());
 120         }
 121         // Add query params if present
 122         if (restParams.getQueryParams() != null) {
 123             for (var entry : restParams.getQueryParams().entrySet()) {
 124                 uriComponentsBuilder.queryParam(entry.getKey(), entry.getValue());
 125             }
 126         }
 127         return uriComponentsBuilder.build().toUriString();
 128     }
 129
 130 }