com.srotya.tau.nucleus.metrics.MetricsSink.java Source code

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Here is the source code for com.srotya.tau.nucleus.metrics.MetricsSink.java

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/**
 * Copyright 2016 Ambud Sharma
 * 
 * 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 com.srotya.tau.nucleus.metrics;

import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.atomic.AtomicLong;

import com.google.common.util.concurrent.AtomicDouble;

/**
 * @author ambudsharma
 */
public class MetricsSink {

    private static final MetricsSink sink = new MetricsSink();
    private SortedMap<String, AtomicLong> intMetrics;
    private SortedMap<String, AtomicDouble> floatMetrics;

    /**
     * 
     */
    private MetricsSink() {
        intMetrics = new TreeMap<>();
        floatMetrics = new TreeMap<>();
    }

    /**
     * @return
     */
    public static MetricsSink getInstance() {
        return sink;
    }

    public void publishIntMetric(String metricName, long value) {
        AtomicLong val = intMetrics.get(metricName);
        if (val == null) {
            val = new AtomicLong(0);
            intMetrics.put(metricName, val);
        }
        val.set(value);
    }

    public void publishFloatMetric(String metricName, double value) {
        AtomicDouble val = floatMetrics.get(metricName);
        if (val == null) {
            val = new AtomicDouble(0);
            floatMetrics.put(metricName, val);
        }
        val.set(value);
    }

    public long getIntMetric(String metricName) throws Exception {
        AtomicLong val = intMetrics.get(metricName);
        if (val != null) {
            return val.get();
        } else {
            throw new Exception("Metric '" + metricName + "' not found");
        }
    }

    public double getDoubleMetric(String metricName) throws Exception {
        AtomicDouble val = floatMetrics.get(metricName);
        if (val != null) {
            return val.get();
        } else {
            throw new Exception("Metric '" + metricName + "' not found");
        }
    }
}