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

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * PNF-REGISTRATION-HANDLER
   4  * ================================================================================
   5  * Copyright (C) 2018 NOKIA Intellectual Property. 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.service.producer;
  22
  23 import org.apache.http.HttpEntity;
  24 import org.apache.http.client.ResponseHandler;
  25 import org.apache.http.client.methods.HttpPost;
  26 import org.apache.http.client.methods.HttpRequestBase;
  27 import org.apache.http.client.utils.URIBuilder;
  28 import org.apache.http.entity.StringEntity;
  29 import org.apache.http.impl.client.CloseableHttpClient;
  30 import org.apache.http.util.EntityUtils;
  31 import org.onap.dcaegen2.services.config.DmaapPublisherConfiguration;
  32 import org.onap.dcaegen2.services.service.DmaapHttpClientImpl;
  33 import org.onap.dcaegen2.services.service.HttpUtils;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 import java.io.IOException;
  38 import java.io.UnsupportedEncodingException;
  39 import java.net.URI;
  40 import java.net.URISyntaxException;
  41 import java.util.Optional;
  42
  43 public class ExtendedDmaapProducerHttpClientImpl {
  44
  45     private static Logger logger = LoggerFactory.getLogger(ExtendedDmaapProducerHttpClientImpl.class);
  46
  47     private final CloseableHttpClient closeableHttpClient;
  48     private final String dmaapHostName;
  49     private final String dmaapProtocol;
  50     private final Integer dmaapPortNumber;
  51     private final String dmaapTopicName;
  52     private final String dmaapContentType;
  53
  54
  55     public ExtendedDmaapProducerHttpClientImpl(DmaapPublisherConfiguration configuration) {
  56         this.closeableHttpClient = new DmaapHttpClientImpl(configuration).getHttpClient();
  57         this.dmaapHostName = configuration.dmaapHostName();
  58         this.dmaapProtocol = configuration.dmaapProtocol();
  59         this.dmaapPortNumber = configuration.dmaapPortNumber();
  60         this.dmaapTopicName = configuration.dmaapTopicName();
  61         this.dmaapContentType = configuration.dmaapContentType();
  62     }
  63
  64     public Optional<String> getHttpProducerResponse(DmaapPublisherRequestDetails requestDetails) {
  65
  66         Optional<String> extendedDetails = Optional.empty();
  67         Optional<HttpRequestBase> request = createRequest(requestDetails);
  68
  69         try {
  70             extendedDetails = closeableHttpClient.execute(request.get(), dmaapProducerResponseHandler());
  71         } catch (IOException | NullPointerException e) {
  72             logger.warn("Exception while executing HTTP request: ", e);
  73         }
  74
  75         return extendedDetails;
  76     }
  77
  78     private Optional<StringEntity> createStringEntity(Optional<String> jsonBody) {
  79         return Optional.of(parseJson(jsonBody).get());
  80     }
  81
  82     private Optional<StringEntity> parseJson(Optional<String> jsonBody) {
  83         Optional<StringEntity> stringEntity = Optional.empty();
  84
  85         try {
  86             stringEntity = Optional.of(new StringEntity(jsonBody.get()));
  87         } catch (UnsupportedEncodingException e) {
  88             logger.warn("Exception while parsing JSON: ", e);
  89         }
  90
  91         return stringEntity;
  92     }
  93
  94     private Optional<HttpRequestBase> createRequest(DmaapPublisherRequestDetails requestDetails) {
  95
  96         Optional<HttpRequestBase> request = Optional.empty();
  97         final URI extendedURI = createDmaapPublisherExtendedURI(requestDetails);
  98
  99         if ("application/json".equals(dmaapContentType)) {
 100             request = Optional.ofNullable(createRequest(extendedURI, requestDetails));
 101             request.get().addHeader("Content-type", dmaapContentType);
 102         }
 103
 104         return request;
 105     }
 106
 107     private URI createDmaapPublisherExtendedURI(DmaapPublisherRequestDetails requestDetails) {
 108         URI extendedURI = null;
 109
 110         final URIBuilder uriBuilder = new URIBuilder()
 111             .setScheme(dmaapProtocol)
 112             .setHost(dmaapHostName)
 113             .setPort(dmaapPortNumber)
 114             .setPath(requestDetails.dmaapAPIPath() + "/" + dmaapTopicName);
 115
 116         try {
 117             extendedURI = uriBuilder.build();
 118             logger.trace("Building extended URI: {}", extendedURI);
 119         } catch (URISyntaxException e) {
 120             logger.warn("Exception while building extended URI: ", e);
 121         }
 122
 123         return extendedURI;
 124     }
 125
 126     private HttpRequestBase createRequest(URI extendedURI, DmaapPublisherRequestDetails requestDetails) {
 127         if (extendedURI != null) {
 128             return createHttpPost(extendedURI, Optional.ofNullable(requestDetails.jsonBody()));
 129         } else {
 130             return null;
 131         }
 132     }
 133
 134     private HttpPost createHttpPost(URI extendedURI, Optional<String> jsonBody) {
 135         HttpPost post = new HttpPost(extendedURI);
 136         Optional<StringEntity> stringEntity = createStringEntity(jsonBody);
 137         post.setEntity(stringEntity.get());
 138         return post;
 139     }
 140
 141     private ResponseHandler<Optional<String>> dmaapProducerResponseHandler() {
 142         return httpResponse -> {
 143             final int responseCode = httpResponse.getStatusLine().getStatusCode();
 144             final HttpEntity responseEntity = httpResponse.getEntity();
 145
 146             if (HttpUtils.isSuccessfulResponseCode(responseCode)) {
 147                 logger.trace("HTTP response successful.");
 148                 return Optional.of("" + responseCode);
 149             } else {
 150                 String response = responseEntity != null ? EntityUtils.toString(responseEntity) : "";
 151                 logger.warn("HTTP response not successful : {}", response);
 152                 return Optional.of("" + responseCode);
 153             }
 154         };
 155     }
 156 }