outputrecord.java

hadoop:Nutch集群平台

/*
 * OutputRecord.java
 *
 * Copyright 2006 The Apache Software Foundation
 *
 * 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 org.apache.hadoop.metrics.spi;

import java.util.Collections;
import java.util.Set;
import org.apache.hadoop.metrics.spi.AbstractMetricsContext.MetricMap;
import org.apache.hadoop.metrics.spi.AbstractMetricsContext.TagMap;

/**
 * Represents a record of metric data to be sent to a metrics system.
 */
public class OutputRecord {
    
    private TagMap tagMap;
    private MetricMap metricMap;
    
    /** Creates a new instance of OutputRecord */
    OutputRecord(TagMap tagMap, MetricMap metricMap) {
        this.tagMap = tagMap;
        this.metricMap = metricMap;
    }
    
    /**
     * Returns the set of tag names
     */
    //public Set<String> getTagNames() {
    public Set getTagNames() {
        return Collections.unmodifiableSet(tagMap.keySet());
    }
    
    /**
     * Returns a tag object which is can be a String, Integer, Short or Byte.
     *
     * @return the tag value, or null if there is no such tag
     */
    public Object getTag(String name) {
        return tagMap.get(name);
    }
    
    /**
     * Returns the set of metric names.
     */
    //public Set<String> getMetricNames() {
    public Set getMetricNames() {
        return Collections.unmodifiableSet(metricMap.keySet());
    }
    
    /**
     * Returns the metric object which can be a Float, Integer, Short or Byte.
     */
    public Number getMetric(String name) {
        return (Number) metricMap.get(name);
    }
    
}