2 * ===============================LICENSE_START======================================
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4 * ================================================================================
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5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
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6 * ================================================================================
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ============================LICENSE_END===========================================
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21 package org.openecomp.dcae.apod.analytics.cdap.plugins.batch.sink.dmaap;
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23 import co.cask.cdap.api.annotation.Description;
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24 import co.cask.cdap.api.annotation.Name;
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25 import co.cask.cdap.api.annotation.Plugin;
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26 import co.cask.cdap.api.data.batch.Output;
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27 import co.cask.cdap.api.data.format.StructuredRecord;
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28 import co.cask.cdap.api.data.schema.Schema;
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29 import co.cask.cdap.api.dataset.lib.KeyValue;
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30 import co.cask.cdap.etl.api.Emitter;
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31 import co.cask.cdap.etl.api.PipelineConfigurer;
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32 import co.cask.cdap.etl.api.batch.BatchSink;
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33 import co.cask.cdap.etl.api.batch.BatchSinkContext;
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34 import org.apache.hadoop.io.NullWritable;
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35 import org.openecomp.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
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36 import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSinkPluginConfig;
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37 import org.openecomp.dcae.apod.analytics.cdap.plugins.utils.CDAPPluginUtils;
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38 import org.openecomp.dcae.apod.analytics.cdap.plugins.validator.DMaaPMRSinkPluginConfigValidator;
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39 import org.slf4j.Logger;
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40 import org.slf4j.LoggerFactory;
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43 * @author Rajiv Singla . Creation Date: 1/26/2017.
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45 @Plugin(type = BatchSink.PLUGIN_TYPE)
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46 @Name("DMaaPMRSink")
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47 @Description("A batch sink Plugin that publishes messages to DMaaP MR Topic.")
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48 public class DMaaPMRSink extends BatchSink<StructuredRecord, String, NullWritable> {
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50 private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSink.class);
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52 private final DMaaPMRSinkPluginConfig pluginConfig;
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54 public DMaaPMRSink(final DMaaPMRSinkPluginConfig pluginConfig) {
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55 LOG.debug("Creating DMaaP MR Sink Plugin with plugin Config: {}", pluginConfig);
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56 this.pluginConfig = pluginConfig;
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60 public void configurePipeline(final PipelineConfigurer pipelineConfigurer) {
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61 super.configurePipeline(pipelineConfigurer);
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62 ValidationUtils.validateSettings(pluginConfig, new DMaaPMRSinkPluginConfigValidator());
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63 // validates that input schema contains the field provided in Sink Message Column Name property
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64 final Schema inputSchema = pipelineConfigurer.getStageConfigurer().getInputSchema();
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65 CDAPPluginUtils.validateSchemaContainsFields(inputSchema, pluginConfig.getMessageColumnName());
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70 public void prepareRun(BatchSinkContext context) throws Exception {
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71 context.addOutput(Output.of(pluginConfig.getReferenceName(), new DMaaPMROutputFormatProvider(pluginConfig)));
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75 public void transform(StructuredRecord structuredRecord,
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76 Emitter<KeyValue<String, NullWritable>> emitter) throws Exception {
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77 // get incoming message from structured record
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78 final String incomingMessage = structuredRecord.get(pluginConfig.getMessageColumnName());
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80 // if incoming messages does not have message column name log warning as it should not happen
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81 if (incomingMessage == null) {
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82 LOG.warn("Column Name: {}, contains no message.Skipped for DMaaP MR Publishing....",
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83 pluginConfig.getMessageColumnName());
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86 // emit the messages as key
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87 emitter.emit(new KeyValue<String, NullWritable>(incomingMessage, null));
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