gerrit.onap Code Review - dcaegen2/collectors/datafile.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  *  Copyright (C) 2019 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.dcaegen2.collectors.datafile.tasks;
  22
  23 import com.google.gson.JsonElement;
  24 import com.google.gson.JsonParser;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.net.URI;
  28 import java.nio.file.Path;
  29 import java.time.Duration;
  30 import java.util.Map;
  31 import org.apache.commons.io.IOUtils;
  32 import org.apache.http.HttpResponse;
  33 import org.apache.http.client.methods.HttpPut;
  34 import org.apache.http.entity.ByteArrayEntity;
  35 import org.onap.dcaegen2.collectors.datafile.configuration.AppConfig;
  36 import org.onap.dcaegen2.collectors.datafile.model.CommonFunctions;
  37 import org.onap.dcaegen2.collectors.datafile.model.ConsumerDmaapModel;
  38 import org.onap.dcaegen2.collectors.datafile.model.logging.MappedDiagnosticContext;
  39 import org.onap.dcaegen2.collectors.datafile.service.HttpUtils;
  40 import org.onap.dcaegen2.collectors.datafile.service.producer.DmaapProducerHttpClient;
  41 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.config.DmaapPublisherConfiguration;
  42 import org.slf4j.Logger;
  43 import org.slf4j.LoggerFactory;
  44 import org.slf4j.MDC;
  45 import org.springframework.core.io.FileSystemResource;
  46 import org.springframework.http.HttpHeaders;
  47 import org.springframework.http.HttpStatus;
  48 import reactor.core.publisher.Mono;
  49
  50 /**
  51  * Publishes a file to the DataRouter.
  52  *
  53  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
  54  * @author <a href="mailto:henrik.b.andersson@est.tech">Henrik Andersson</a>
  55  */
  56 public class DataRouterPublisher {
  57     private static final String X_DMAAP_DR_META = "X-DMAAP-DR-META";
  58     private static final String CONTENT_TYPE = "application/octet-stream";
  59     private static final String NAME_JSON_TAG = "name";
  60     private static final String INTERNAL_LOCATION_JSON_TAG = "internalLocation";
  61     private static final String PUBLISH_TOPIC = "publish";
  62     private static final String DEFAULT_FEED_ID = "1";
  63
  64     private static final Logger logger = LoggerFactory.getLogger(DataRouterPublisher.class);
  65     private final AppConfig datafileAppConfig;
  66     private DmaapProducerHttpClient dmaapProducerReactiveHttpClient;
  67
  68     public DataRouterPublisher(AppConfig datafileAppConfig) {
  69         this.datafileAppConfig = datafileAppConfig;
  70     }
  71
  72
  73     /**
  74      * Publish one file.
  75      *
  76      * @param model information about the file to publish
  77      * @param numRetries the maximal number of retries if the publishing fails
  78      * @param firstBackoff the time to delay the first retry
  79      * @param contextMap tracing context variables
  80      * @return the (same) ConsumerDmaapModel
  81      */
  82     public Mono<ConsumerDmaapModel> execute(ConsumerDmaapModel model, long numRetries, Duration firstBackoff,
  83             Map<String, String> contextMap) {
  84         MDC.setContextMap(contextMap);
  85         logger.trace("Publish called with arg {}", model);
  86         dmaapProducerReactiveHttpClient = resolveClient();
  87
  88         return Mono.just(model)
  89                 .cache()
  90                 .flatMap(m -> publishFile(m, contextMap)) //
  91                 .flatMap(httpStatus -> handleHttpResponse(httpStatus, model, contextMap)) //
  92                 .retryBackoff(numRetries, firstBackoff);
  93     }
  94
  95     private Mono<HttpStatus> publishFile(ConsumerDmaapModel consumerDmaapModel, Map<String, String> contextMap) {
  96         logger.trace("Entering publishFile with {}", consumerDmaapModel);
  97         try {
  98             HttpPut put = new HttpPut();
  99             prepareHead(consumerDmaapModel, put);
 100             prepareBody(consumerDmaapModel, put);
 101             dmaapProducerReactiveHttpClient.addUserCredentialsToHead(put);
 102
 103             HttpResponse response =
 104                     dmaapProducerReactiveHttpClient.getDmaapProducerResponseWithRedirect(put, contextMap);
 105             logger.trace("{}", response);
 106             return Mono.just(HttpStatus.valueOf(response.getStatusLine().getStatusCode()));
 107         } catch (Exception e) {
 108             logger.warn("Unable to send file to DataRouter. Data: {}", consumerDmaapModel.getInternalLocation(), e);
 109             return Mono.error(e);
 110         }
 111     }
 112
 113     private void prepareHead(ConsumerDmaapModel model, HttpPut put) {
 114         put.addHeader(HttpHeaders.CONTENT_TYPE, CONTENT_TYPE);
 115         JsonElement metaData = new JsonParser().parse(CommonFunctions.createJsonBody(model));
 116         metaData.getAsJsonObject().remove(NAME_JSON_TAG).getAsString();
 117         metaData.getAsJsonObject().remove(INTERNAL_LOCATION_JSON_TAG);
 118         put.addHeader(X_DMAAP_DR_META, metaData.toString());
 119         put.setURI(getPublishUri(model.getName()));
 120         MappedDiagnosticContext.appendTraceInfo(put);
 121     }
 122
 123     private void prepareBody(ConsumerDmaapModel model, HttpPut put) throws IOException {
 124         Path fileLocation = model.getInternalLocation();
 125         try (InputStream fileInputStream = createInputStream(fileLocation)) {
 126             put.setEntity(new ByteArrayEntity(IOUtils.toByteArray(fileInputStream)));
 127         }
 128     }
 129
 130     private URI getPublishUri(String fileName) {
 131         return dmaapProducerReactiveHttpClient.getBaseUri() //
 132                 .pathSegment(PUBLISH_TOPIC) //
 133                 .pathSegment(DEFAULT_FEED_ID) //
 134                 .pathSegment(fileName).build();
 135     }
 136
 137     private Mono<ConsumerDmaapModel> handleHttpResponse(HttpStatus response, ConsumerDmaapModel model,
 138             Map<String, String> contextMap) {
 139         MDC.setContextMap(contextMap);
 140         if (HttpUtils.isSuccessfulResponseCode(response.value())) {
 141             logger.trace("Publish to DR successful!");
 142             return Mono.just(model);
 143         } else {
 144             logger.warn("Publish to DR unsuccessful, response code: {}", response);
 145             return Mono.error(new Exception("Publish to DR unsuccessful, response code: " + response));
 146         }
 147     }
 148
 149     InputStream createInputStream(Path filePath) throws IOException {
 150         FileSystemResource realResource = new FileSystemResource(filePath);
 151         return realResource.getInputStream();
 152     }
 153
 154     DmaapPublisherConfiguration resolveConfiguration() {
 155         return datafileAppConfig.getDmaapPublisherConfiguration();
 156     }
 157
 158     DmaapProducerHttpClient resolveClient() {
 159         return new DmaapProducerHttpClient(resolveConfiguration());
 160     }
 161 }