gerrit.onap Code Review - dcaegen2/services/sdk.git/blob

   1 /*
   2  * ============LICENSE_START====================================
   3  * DCAEGEN2-SERVICES-SDK
   4  * =========================================================
   5  * Copyright (C) 2019 Nokia. All rights reserved.
   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.onap.dcaegen2.services.sdk.rest.services.dmaap.client.impl;
  22
  23 import static org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.impl.Commons.extractFailReason;
  24
  25 import com.google.gson.Gson;
  26 import com.google.gson.JsonArray;
  27 import java.nio.charset.StandardCharsets;
  28 import org.jetbrains.annotations.NotNull;
  29 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpMethod;
  30 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpRequest;
  31 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.HttpResponse;
  32 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.ImmutableHttpRequest;
  33 import org.onap.dcaegen2.services.sdk.rest.services.adapters.http.RxHttpClient;
  34 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.api.MessageRouterSubscriber;
  35 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.ImmutableMessageRouterSubscribeResponse;
  36 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeRequest;
  37 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.model.MessageRouterSubscribeResponse;
  38 import reactor.core.publisher.Mono;
  39
  40 /**
  41  * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
  42  * @since March 2019
  43  */
  44 // TODO: This is a PoC. It's untested.
  45 public class MessageRouterSubscriberImpl implements MessageRouterSubscriber {
  46     private final RxHttpClient httpClient;
  47     private final Gson gson;
  48
  49     public MessageRouterSubscriberImpl(RxHttpClient httpClient, Gson gson) {
  50         this.httpClient = httpClient;
  51         this.gson = gson;
  52     }
  53
  54     @Override
  55     public Mono<MessageRouterSubscribeResponse> get(MessageRouterSubscribeRequest request) {
  56         return httpClient.call(buildGetHttpRequest(request)).map(this::buildGetResponse);
  57     }
  58
  59
  60     private @NotNull MessageRouterSubscribeResponse buildGetResponse(HttpResponse httpResponse) {
  61         final ImmutableMessageRouterSubscribeResponse.Builder builder =
  62                 ImmutableMessageRouterSubscribeResponse.builder();
  63         return httpResponse.successful()
  64                 ? builder.items(httpResponse.bodyAsJson(StandardCharsets.UTF_8, gson, JsonArray.class)).build()
  65                 : builder.failReason(extractFailReason(httpResponse)).build();
  66     }
  67
  68
  69     private @NotNull HttpRequest buildGetHttpRequest(MessageRouterSubscribeRequest request) {
  70         return ImmutableHttpRequest.builder()
  71                 .method(HttpMethod.GET)
  72                 .url(buildSubscribeUrl(request))
  73                 .diagnosticContext(request.diagnosticContext())
  74                 .build();
  75     }
  76
  77     private String buildSubscribeUrl(MessageRouterSubscribeRequest request) {
  78         return String.format("%s/%s/%s", request.sourceDefinition().topicUrl(), request.consumerGroup(),
  79                 request.consumerId());
  80     }
  81 }