io.cdap.cdap.internal.app.runtime.batch.MapTaskMetricsWriter Maven / Gradle / Ivy
/*
* Copyright © 2017 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.cdap.internal.app.runtime.batch;
import com.google.common.collect.ImmutableMap;
import io.cdap.cdap.api.metrics.MetricsContext;
import io.cdap.cdap.app.metrics.MapReduceMetrics;
import org.apache.hadoop.mapreduce.MapContext;
import org.apache.hadoop.mapreduce.TaskCounter;
import java.util.Map;
/**
* Gathers statistics from a running map task through its counters and writes the data to the metrics system.
*/
public class MapTaskMetricsWriter extends TaskMetricsWriter {
public MapTaskMetricsWriter(MetricsContext metricsContext, MapContext mapContext) {
super(metricsContext, mapContext);
}
@Override
public Map getTaskCounters() {
return ImmutableMap.of(MapReduceMetrics.METRIC_TASK_INPUT_RECORDS, TaskCounter.MAP_INPUT_RECORDS,
MapReduceMetrics.METRIC_TASK_OUTPUT_RECORDS, TaskCounter.MAP_OUTPUT_RECORDS,
MapReduceMetrics.METRIC_TASK_BYTES, TaskCounter.MAP_OUTPUT_BYTES);
}
}