io.cdap.plugin.batch.source.TimePartitionedFileSetDatasetAvroSource Maven / Gradle / Ivy
/*
* Copyright © 2015-2019 Cask Data, Inc.
*
* 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.
*/
package io.cdap.plugin.batch.source;
import io.cdap.cdap.api.annotation.Description;
import io.cdap.cdap.api.annotation.Name;
import io.cdap.cdap.api.annotation.Plugin;
import io.cdap.cdap.api.annotation.Requirements;
import io.cdap.cdap.api.data.format.StructuredRecord;
import io.cdap.cdap.api.dataset.lib.FileSetProperties;
import io.cdap.cdap.api.dataset.lib.KeyValue;
import io.cdap.cdap.api.dataset.lib.TimePartitionedFileSet;
import io.cdap.cdap.etl.api.Emitter;
import io.cdap.cdap.etl.api.batch.BatchSource;
import io.cdap.plugin.common.FileSetUtil;
import io.cdap.plugin.format.FileFormat;
import org.apache.hadoop.io.NullWritable;
/**
* A {@link BatchSource} to read Avro record from {@link TimePartitionedFileSet}
*/
@Plugin(type = "batchsource")
@Name("TPFSAvro")
@Description("Reads from a TimePartitionedFileSet whose data is in Avro format.")
@Requirements(datasetTypes = TimePartitionedFileSet.TYPE)
public class TimePartitionedFileSetDatasetAvroSource extends TimePartitionedFileSetSource {
public TimePartitionedFileSetDatasetAvroSource(TPFSConfig tpfsAvroConfig) {
super(tpfsAvroConfig);
}
@Override
protected String getInputFormatName() {
return FileFormat.AVRO.name().toLowerCase();
}
@Override
protected void addFileSetProperties(FileSetProperties.Builder properties) {
FileSetUtil.configureAvroFileSet(config.getSchema().toString(), properties);
}
@Override
public void transform(KeyValue input, Emitter emitter) {
emitter.emit(input.getValue());
}
}