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/*
* ===============================LICENSE_START======================================
* dcae-analytics
* ================================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ============================LICENSE_END===========================================
*/
package org.openecomp.dcae.apod.analytics.cdap.plugins.streaming.dmaap;
import co.cask.cdap.api.annotation.Description;
import co.cask.cdap.api.annotation.Name;
import co.cask.cdap.api.annotation.Plugin;
import co.cask.cdap.api.data.format.StructuredRecord;
import co.cask.cdap.etl.api.PipelineConfigurer;
import co.cask.cdap.etl.api.streaming.StreamingContext;
import co.cask.cdap.etl.api.streaming.StreamingSource;
import org.apache.spark.storage.StorageLevel;
import org.apache.spark.streaming.api.java.JavaDStream;
import org.openecomp.dcae.apod.analytics.cdap.common.utils.ValidationUtils;
import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.config.dmaap.DMaaPMRSourcePluginConfig;
import org.openecomp.dcae.apod.analytics.cdap.plugins.domain.schema.dmaap.DMaaPSourceOutputSchema;
import org.openecomp.dcae.apod.analytics.cdap.plugins.validator.DMaaPMRSourcePluginConfigValidator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* DMaaP MR Source Plugin which polls DMaaP MR topic at frequent intervals
* <p>
* @author Rajiv Singla . Creation Date: 1/18/2017.
*/
@Plugin(type = StreamingSource.PLUGIN_TYPE)
@Name("DMaaPMRSource")
@Description("Fetches DMaaP MR Messages at regular intervals")
public class DMaaPMRSource extends StreamingSource<StructuredRecord> {
private static final Logger LOG = LoggerFactory.getLogger(DMaaPMRSource.class);
private static final long serialVersionUID = 1L;
private final DMaaPMRSourcePluginConfig pluginConfig;
public DMaaPMRSource(final DMaaPMRSourcePluginConfig pluginConfig) {
LOG.debug("Creating DMaaP MR Source plugin with plugin Config: {}", pluginConfig);
this.pluginConfig = pluginConfig;
}
@Override
public void configurePipeline(PipelineConfigurer pipelineConfigurer) {
ValidationUtils.validateSettings(pluginConfig, new DMaaPMRSourcePluginConfigValidator());
pipelineConfigurer.getStageConfigurer().setOutputSchema(DMaaPSourceOutputSchema.getSchema());
}
@Override
public JavaDStream<StructuredRecord> getStream(final StreamingContext streamingContext) throws Exception {
return streamingContext.getSparkStreamingContext().receiverStream(
new DMaaPMRReceiver(StorageLevel.MEMORY_ONLY(), pluginConfig, streamingContext.getMetrics()));
}
}
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