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     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      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.error("Exception while executing HTTP request: {}", e);
  73         }
  74
  75         return extendedDetails;
  76     }
  77
  78     private Boolean isExtendedURINotNull(URI extendedURI) {
  79         return extendedURI != null;
  80     }
  81
  82     private Optional<StringEntity> createStringEntity(Optional<String> jsonBody) {
  83         return Optional.of(parseJson(jsonBody).get());
  84     }
  85
  86     private Optional<StringEntity> parseJson(Optional<String> jsonBody) {
  87         Optional<StringEntity> stringEntity = Optional.empty();
  88
  89         try {
  90             stringEntity = Optional.of(new StringEntity(jsonBody.get()));
  91         } catch (UnsupportedEncodingException e) {
  92             logger.error("Exception while parsing JSON: {}", e);
  93         }
  94
  95         return stringEntity;
  96     }
  97
  98     private Optional<HttpRequestBase> createRequest (DmaapPublisherRequestDetails requestDetails) {
  99
 100         Optional<HttpRequestBase> request = Optional.empty();
 101         final URI extendedURI = createDmaapPublisherExtendedURI(requestDetails);
 102
 103         if ("application/json".equals(dmaapContentType)) {
 104             request = Optional.ofNullable(createRequest(extendedURI, requestDetails));
 105             request.get().addHeader("Content-type", dmaapContentType);
 106         }
 107
 108         return request;
 109     }
 110
 111     private URI createDmaapPublisherExtendedURI(DmaapPublisherRequestDetails requestDetails) {
 112         URI extendedURI = null;
 113
 114         final URIBuilder uriBuilder = new URIBuilder()
 115                 .setScheme(dmaapProtocol)
 116                 .setHost(dmaapHostName)
 117                 .setPort(dmaapPortNumber)
 118                 .setPath(requestDetails.dmaapAPIPath() + "/" + dmaapTopicName);
 119
 120         try {
 121             extendedURI = uriBuilder.build();
 122             logger.info("Building extended URI: {}",extendedURI);
 123         } catch (URISyntaxException e) {
 124             logger.error("Exception while building extended URI: {}", e);
 125         }
 126
 127         return extendedURI;
 128     }
 129
 130     private HttpRequestBase createRequest(URI extendedURI, DmaapPublisherRequestDetails requestDetails) {
 131         if (isExtendedURINotNull(extendedURI) && requestDetails.jsonBody().isPresent()) {
 132             return createHttpPost(extendedURI, requestDetails.jsonBody());
 133         } else {
 134             return null;
 135         }
 136     }
 137
 138     private HttpPost createHttpPost(URI extendedURI, Optional<String> jsonBody) {
 139         HttpPost post = new HttpPost(extendedURI);
 140         Optional<StringEntity> stringEntity = createStringEntity(jsonBody);
 141         post.setEntity(stringEntity.get());
 142         return post;
 143     }
 144
 145     private ResponseHandler<Optional<String>> dmaapProducerResponseHandler() {
 146         return httpResponse ->  {
 147             final int responseCode = httpResponse.getStatusLine().getStatusCode();
 148             final HttpEntity responseEntity = httpResponse.getEntity();
 149
 150             if (HttpUtils.isSuccessfulResponseCode(responseCode)) {
 151                 logger.info("HTTP response successful.");
 152                 return Optional.of("" + responseCode);
 153             } else {
 154                 String response = responseEntity != null ? EntityUtils.toString(responseEntity) : "";
 155                 logger.error("HTTP response not successful : {}", response);
 156                 return Optional.of("" + responseCode);
 157             }
 158         };
 159     }
 160 }