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
  26 import java.io.IOException;
  27 import java.io.InputStream;
  28 import java.net.MalformedURLException;
  29 import java.net.URI;
  30 import java.nio.file.Path;
  31 import java.time.Duration;
  32
  33 import org.apache.commons.io.IOUtils;
  34 import org.apache.http.HttpResponse;
  35 import org.apache.http.client.methods.HttpPut;
  36 import org.apache.http.entity.ByteArrayEntity;
  37 import org.onap.dcaegen2.collectors.datafile.configuration.AppConfig;
  38 import org.onap.dcaegen2.collectors.datafile.configuration.PublisherConfiguration;
  39 import org.onap.dcaegen2.collectors.datafile.exceptions.DatafileTaskException;
  40 import org.onap.dcaegen2.collectors.datafile.model.FilePublishInformation;
  41 import org.onap.dcaegen2.collectors.datafile.model.JsonSerializer;
  42 import org.onap.dcaegen2.collectors.datafile.model.logging.MappedDiagnosticContext;
  43 import org.onap.dcaegen2.collectors.datafile.service.HttpUtils;
  44 import org.onap.dcaegen2.collectors.datafile.service.producer.DmaapProducerHttpClient;
  45 import org.onap.dcaegen2.services.sdk.rest.services.dmaap.client.config.DmaapPublisherConfiguration;
  46 import org.slf4j.Logger;
  47 import org.slf4j.LoggerFactory;
  48 import org.slf4j.MDC;
  49 import org.springframework.core.io.FileSystemResource;
  50 import org.springframework.http.HttpHeaders;
  51 import org.springframework.http.HttpStatus;
  52 import org.springframework.web.util.DefaultUriBuilderFactory;
  53
  54 import reactor.core.publisher.Mono;
  55
  56 /**
  57  * Publishes a file to the DataRouter.
  58  *
  59  * @author <a href="mailto:przemyslaw.wasala@nokia.com">Przemysław Wąsala</a> on 4/13/18
  60  * @author <a href="mailto:henrik.b.andersson@est.tech">Henrik Andersson</a>
  61  */
  62 public class DataRouterPublisher {
  63     private static final String X_DMAAP_DR_META = "X-DMAAP-DR-META";
  64     private static final String CONTENT_TYPE = "application/octet-stream";
  65
  66     private static final Logger logger = LoggerFactory.getLogger(DataRouterPublisher.class);
  67     private final AppConfig datafileAppConfig;
  68
  69     public DataRouterPublisher(AppConfig datafileAppConfig) {
  70         this.datafileAppConfig = datafileAppConfig;
  71     }
  72
  73     /**
  74      * Publish one file.
  75      *
  76      * @param publishInfo 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      * @return the (same) filePublishInformation
  80      */
  81     public Mono<FilePublishInformation> publishFile(FilePublishInformation publishInfo, long numRetries,
  82             Duration firstBackoff) {
  83         MDC.setContextMap(publishInfo.getContext());
  84         return Mono.just(publishInfo) //
  85                 .cache() //
  86                 .flatMap(this::publishFile) //
  87                 .flatMap(httpStatus -> handleHttpResponse(httpStatus, publishInfo)) //
  88                 .retryBackoff(numRetries, firstBackoff);
  89     }
  90
  91     private Mono<HttpStatus> publishFile(FilePublishInformation publishInfo) {
  92         MDC.setContextMap(publishInfo.getContext());
  93         logger.trace("Entering publishFile with {}", publishInfo);
  94         try {
  95             DmaapProducerHttpClient dmaapProducerHttpClient = resolveClient(publishInfo.getChangeIdentifier());
  96             HttpPut put = new HttpPut();
  97             prepareHead(publishInfo, put);
  98             prepareBody(publishInfo, put);
  99             dmaapProducerHttpClient.addUserCredentialsToHead(put);
 100
 101             HttpResponse response =
 102                     dmaapProducerHttpClient.getDmaapProducerResponseWithRedirect(put, publishInfo.getContext());
 103             logger.trace("{}", response);
 104             return Mono.just(HttpStatus.valueOf(response.getStatusLine().getStatusCode()));
 105         } catch (Exception e) {
 106             logger.warn("Unable to send file to DataRouter. Data: {}", publishInfo.getInternalLocation(), e);
 107             return Mono.error(e);
 108         }
 109     }
 110
 111     private void prepareHead(FilePublishInformation publishInfo, HttpPut put) throws DatafileTaskException {
 112
 113         put.addHeader(HttpHeaders.CONTENT_TYPE, CONTENT_TYPE);
 114         JsonElement metaData = new JsonParser().parse(JsonSerializer.createJsonBodyForDataRouter(publishInfo));
 115         put.addHeader(X_DMAAP_DR_META, metaData.toString());
 116         URI uri = new DefaultUriBuilderFactory(
 117                 datafileAppConfig.getPublisherConfiguration(publishInfo.getChangeIdentifier()).publishUrl()) //
 118                 .builder() //
 119                 .pathSegment(publishInfo.getName()) //
 120                 .build();
 121         put.setURI(uri);
 122
 123         MappedDiagnosticContext.appendTraceInfo(put);
 124     }
 125
 126     private void prepareBody(FilePublishInformation publishInfo, HttpPut put) throws IOException {
 127         Path fileLocation = publishInfo.getInternalLocation();
 128         try (InputStream fileInputStream = createInputStream(fileLocation)) {
 129             put.setEntity(new ByteArrayEntity(IOUtils.toByteArray(fileInputStream)));
 130         }
 131     }
 132
 133     private static Mono<FilePublishInformation> handleHttpResponse(HttpStatus response, FilePublishInformation publishInfo) {
 134         MDC.setContextMap(publishInfo.getContext());
 135         if (HttpUtils.isSuccessfulResponseCode(response.value())) {
 136             logger.trace("Publish to DR successful!");
 137             return Mono.just(publishInfo);
 138         } else {
 139             logger.warn("Publish to DR unsuccessful, response code: {}", response);
 140             return Mono.error(new Exception("Publish to DR unsuccessful, response code: " + response));
 141         }
 142     }
 143
 144     InputStream createInputStream(Path filePath) throws IOException {
 145         FileSystemResource realResource = new FileSystemResource(filePath);
 146         return realResource.getInputStream();
 147     }
 148
 149     PublisherConfiguration resolveConfiguration(String changeIdentifer) throws DatafileTaskException {
 150         return datafileAppConfig.getPublisherConfiguration(changeIdentifer);
 151     }
 152
 153     DmaapProducerHttpClient resolveClient(String changeIdentifier) throws DatafileTaskException {
 154         try {
 155             DmaapPublisherConfiguration cfg = resolveConfiguration(changeIdentifier).toDmaap();
 156             return new DmaapProducerHttpClient(cfg);
 157         } catch (MalformedURLException e) {
 158             throw new DatafileTaskException("Cannot resolve producer client", e);
 159         }
 160
 161     }
 162 }