/*
* Copyright © 2014-2016 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 co.cask.cdap.app.metrics;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import java.util.Map;
/**
* Metrics collector for MapReduce job.
* todo: extract TaskType enum in its own class
*/
public final class MapReduceMetrics {
public static final String METRIC_INPUT_RECORDS = "process.entries.in";
public static final String METRIC_OUTPUT_RECORDS = "process.entries.out";
public static final String METRIC_BYTES = "process.bytes";
public static final String METRIC_COMPLETION = "process.completion";
public static final String METRIC_TASK_INPUT_RECORDS = "process.entries.task.in";
public static final String METRIC_TASK_OUTPUT_RECORDS = "process.entries.task.out";
public static final String METRIC_TASK_BYTES = "process.task.bytes";
public static final String METRIC_TASK_COMPLETION = "process.completion.task";
public static final String METRIC_USED_CONTAINERS = "resources.used.containers";
public static final String METRIC_USED_MEMORY = "resources.used.memory";
/**
* Type of map reduce task.
*/
public enum TaskType {
Mapper("m"),
Reducer("r");
private static final Map<org.apache.hadoop.mapreduce.TaskType, TaskType> LOOKUP_BY_MAP =
ImmutableMap.of(org.apache.hadoop.mapreduce.TaskType.MAP, Mapper,
org.apache.hadoop.mapreduce.TaskType.REDUCE, Reducer);
private final String id;
TaskType(String id) {
this.id = id;
}
public String getId() {
return id;
}
public static boolean hasType(org.apache.hadoop.mapreduce.TaskType hadoopTaskType) {
return LOOKUP_BY_MAP.containsKey(hadoopTaskType);
}
/**
* @return the corresponding {@link TaskType} for the given {@link org.apache.hadoop.mapreduce.TaskType}, or throws
* IllegalArgumentException if there is no corresponding TaskType.
*/
public static TaskType from(org.apache.hadoop.mapreduce.TaskType hadoopTaskType) {
Preconditions.checkArgument(LOOKUP_BY_MAP.containsKey(hadoopTaskType),
"No TaskType for value: %s.", hadoopTaskType);
return LOOKUP_BY_MAP.get(hadoopTaskType);
}
}
}