2 * ===============================LICENSE_START======================================
4 * ================================================================================
5 * Copyright © 2017 AT&T 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
11 * http://www.apache.org/licenses/LICENSE-2.0
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===========================================
21 package org.openecomp.dcae.apod.analytics.cdap.plugins.batch.sink.dmaap;
23 import co.cask.cdap.api.annotation.Description;
24 import co.cask.cdap.api.annotation.Name;
25 import co.cask.cdap.api.annotation.Plugin;
26 import co.cask.cdap.api.data.batch.Output;
27 import co.cask.cdap.api.data.format.StructuredRecord;
28 import co.cask.cdap.api.data.schema.Schema;
29 import co.cask.cdap.api.dataset.lib.KeyValue;
30 import co.cask.cdap.etl.api.Emitter;
31 import co.cask.cdap.etl.api.PipelineConfigurer;
32 import co.cask.cdap.etl.api.batch.BatchSink;
33 import co.cask.cdap.etl.api.batch.BatchSinkContext;
34 import org.apache.hadoop.io.NullWritable;
35 import org.openecomp.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
36 import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSinkPluginConfig;
37 import org.openecomp.dcae.apod.analytics.cdap.plugins.utils.CDAPPluginUtils;
38 import org.openecomp.dcae.apod.analytics.cdap.plugins.validator.DMaaPMRSinkPluginConfigValidator;
39 import org.slf4j.Logger;
40 import org.slf4j.LoggerFactory;
43 * @author Rajiv Singla . Creation Date: 1/26/2017.
45 @Plugin(type = BatchSink.PLUGIN_TYPE)
47 @Description("A batch sink Plugin that publishes messages to DMaaP MR Topic.")
48 public class DMaaPMRSink extends BatchSink<StructuredRecord, String, NullWritable> {
50 private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSink.class);
52 private final DMaaPMRSinkPluginConfig pluginConfig;
54 public DMaaPMRSink(final DMaaPMRSinkPluginConfig pluginConfig) {
55 LOG.debug("Creating DMaaP MR Sink Plugin with plugin Config: {}", pluginConfig);
56 this.pluginConfig = pluginConfig;
60 public void configurePipeline(final PipelineConfigurer pipelineConfigurer) {
61 super.configurePipeline(pipelineConfigurer);
62 ValidationUtils.validateSettings(pluginConfig, new DMaaPMRSinkPluginConfigValidator());
63 // validates that input schema contains the field provided in Sink Message Column Name property
64 final Schema inputSchema = pipelineConfigurer.getStageConfigurer().getInputSchema();
65 CDAPPluginUtils.validateSchemaContainsFields(inputSchema, pluginConfig.getMessageColumnName());
70 public void prepareRun(BatchSinkContext context) throws Exception {
71 context.addOutput(Output.of(pluginConfig.getReferenceName(), new DMaaPMROutputFormatProvider(pluginConfig)));
75 public void transform(StructuredRecord structuredRecord,
76 Emitter<KeyValue<String, NullWritable>> emitter) throws Exception {
77 // get incoming message from structured record
78 final String incomingMessage = structuredRecord.get(pluginConfig.getMessageColumnName());
80 // if incoming messages does not have message column name log warning as it should not happen
81 if (incomingMessage == null) {
82 LOG.warn("Column Name: {}, contains no message.Skipped for DMaaP MR Publishing....",
83 pluginConfig.getMessageColumnName());
86 // emit the messages as key
87 emitter.emit(new KeyValue<String, NullWritable>(incomingMessage, null));