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.streaming.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.format.StructuredRecord;
27 import co.cask.cdap.etl.api.PipelineConfigurer;
28 import co.cask.cdap.etl.api.streaming.StreamingContext;
29 import co.cask.cdap.etl.api.streaming.StreamingSource;
30 import org.apache.spark.storage.StorageLevel;
31 import org.apache.spark.streaming.api.java.JavaDStream;
32 import org.openecomp.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
33 import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSourcePluginConfig;
34 import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.schema.dmaap.DMaaPSourceOutputSchema;
35 import org.openecomp.dcae.apod.analytics.cdap.plugins.validator.DMaaPMRSourcePluginConfigValidator;
36 import org.slf4j.Logger;
37 import org.slf4j.LoggerFactory;
40 * DMaaP MR Source Plugin which polls DMaaP MR topic at frequent intervals
42 * @author Rajiv Singla . Creation Date: 1/18/2017.
44 @Plugin(type = StreamingSource.PLUGIN_TYPE)
45 @Name("DMaaPMRSource")
46 @Description("Fetches DMaaP MR Messages at regular intervals")
47 public class DMaaPMRSource extends StreamingSource<StructuredRecord> {
49 private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSource.class);
50 private static final long serialVersionUID = 1L;
52 private final DMaaPMRSourcePluginConfig pluginConfig;
54 public DMaaPMRSource(final DMaaPMRSourcePluginConfig pluginConfig) {
55 LOG.debug("Creating DMaaP MR Source plugin with plugin Config: {}", pluginConfig);
56 this.pluginConfig = pluginConfig;
60 public void configurePipeline(PipelineConfigurer pipelineConfigurer) {
61 ValidationUtils.validateSettings(pluginConfig, new DMaaPMRSourcePluginConfigValidator());
62 pipelineConfigurer.getStageConfigurer().setOutputSchema(DMaaPSourceOutputSchema.getSchema());
66 public JavaDStream<StructuredRecord> getStream(final StreamingContext streamingContext) throws Exception {
67 return streamingContext.getSparkStreamingContext().receiverStream(
68 new DMaaPMRReceiver(StorageLevel.MEMORY_ONLY(), pluginConfig, streamingContext.getMetrics()));