com.cloudera.hadoop.hdfs.nfs.metrics.InMemoryMetricsPublisher.java Source code

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Here is the source code for com.cloudera.hadoop.hdfs.nfs.metrics.InMemoryMetricsPublisher.java

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/**
 * Copyright 2012 Cloudera Inc.
 *
 * 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 com.cloudera.hadoop.hdfs.nfs.metrics;

import java.util.Map;
import java.util.concurrent.ConcurrentMap;

import com.google.common.collect.Maps;

public class InMemoryMetricsPublisher implements MetricPublisher {

    private final ConcurrentMap<String, Long> mLatest;

    public InMemoryMetricsPublisher() {
        mLatest = Maps.newConcurrentMap();
    }

    public Map<String, Long> getValues() {
        return mLatest;
    }

    @Override
    public void publish(Map<String, Long> values) {
        for (String key : values.keySet()) {
            long current = mLatest.containsKey(key) ? mLatest.get(key) : 0L;
            mLatest.put(key, current + values.get(key));
        }
    }
}