| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.hadoop.hdfs.server.datanode.metrics; |
| |
| import org.apache.hadoop.hdfs.server.datanode.metrics.FSDatasetMBean; |
| import org.apache.hadoop.metrics2.MetricsCollector; |
| import org.apache.hadoop.metrics2.MetricsTag; |
| import org.apache.hadoop.metrics2.lib.Interns; |
| |
| import java.io.IOException; |
| |
| public class DataNodeMetricHelper { |
| |
| /** |
| * Get metrics helper provides Helper function for |
| * metrics2 interface to act as a Metric source |
| * |
| * @param collector Metrics Collector that is passed in |
| * @param beanClass The Class that currently impliments the metric functions |
| * @param context A string that idenitifies the context |
| * |
| * @throws IOException |
| */ |
| public static void getMetrics(MetricsCollector collector, |
| FSDatasetMBean beanClass, String context) |
| throws IOException { |
| |
| if (beanClass == null) { |
| throw new IOException("beanClass cannot be null"); |
| } |
| |
| String className = beanClass.getClass().getName(); |
| |
| collector.addRecord(className) |
| .setContext(context) |
| .addGauge(Interns.info("Capacity", "Total storage capacity"), |
| beanClass.getCapacity()) |
| .addGauge(Interns.info("DfsUsed", "Total bytes used by dfs datanode"), |
| beanClass.getDfsUsed()) |
| .addGauge(Interns.info("Remaining", "Total bytes of free storage"), |
| beanClass.getRemaining()) |
| .add(new MetricsTag(Interns.info("StorageInfo", "Storage ID"), |
| beanClass.getStorageInfo())) |
| .addGauge(Interns.info("NumFailedVolumes", "Number of failed Volumes" + |
| " in the data Node"), beanClass.getNumFailedVolumes()) |
| .addGauge(Interns.info("LastVolumeFailureDate", "Last Volume failure in" + |
| " milliseconds from epoch"), beanClass.getLastVolumeFailureDate()) |
| .addGauge(Interns.info("EstimatedCapacityLostTotal", "Total capacity lost" |
| + " due to volume failure"), beanClass.getEstimatedCapacityLostTotal()) |
| .addGauge(Interns.info("CacheUsed", "Datanode cache used in bytes"), |
| beanClass.getCacheUsed()) |
| .addGauge(Interns.info("CacheCapacity", "Datanode cache capacity"), |
| beanClass.getCacheCapacity()) |
| .addGauge(Interns.info("NumBlocksCached", "Datanode number" + |
| " of blocks cached"), beanClass.getNumBlocksCached()) |
| .addGauge(Interns.info("NumBlocksFailedToCache", "Datanode number of " + |
| "blocks failed to cache"), beanClass.getNumBlocksFailedToCache()) |
| .addGauge(Interns.info("NumBlocksFailedToUnCache", "Datanode number of" + |
| " blocks failed in cache eviction"), |
| beanClass.getNumBlocksFailedToUncache()); |
| |
| } |
| |
| } |