001/**
002 * Copyright (C) 2012 FuseSource, Inc.
003 * http://fusesource.com
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *    http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package org.fusesource.hawtdispatch;
019
020/**
021 * <p>
022 * </p>
023 *
024 * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
025 */
026public class Metrics {
027
028    /**
029     * How long the metrics gathered
030     */
031    public long durationNS;
032
033    /**
034     * The dispatch queue associated with the metrics collected.
035     */
036    public DispatchQueue queue;
037
038    /**
039     * The number of runnable tasks queued.
040     */
041    public long enqueued;
042
043    /**
044     * The number of runnable tasks that have been removed from the queue
045     * and executed.
046     */
047    public long dequeued;
048
049    /**
050     * The longest amount of time at runnable task spent waiting in
051     * the queue.
052     */
053    public long maxWaitTimeNS;
054
055    /**
056     * The long amount of time a runnable task spent executing in nanoseconds.
057     */
058    public long maxRunTimeNS;
059
060    /**
061     * The sum of all the time spent executing tasks in nanoseconds.
062     */
063    public long totalRunTimeNS;
064
065    /**
066     * The sum of all the time that tasks spent waiting in the queue in nanoseconds.
067     */
068    public long totalWaitTimeNS;
069
070    @Override
071    public String toString() {
072        return String.format("{ label:%s, enqueued:%d, dequeued:%d, max_wait_time:%.2f ms, max_run_time:%.2f ms, total_run_time:%.2f ms, total_wait_time:%.2f ms }",
073                queue.getLabel(),
074                enqueued,
075                dequeued,
076                maxWaitTimeNS / 1000000.0f,
077                maxRunTimeNS / 1000000.0f,
078                totalRunTimeNS / 1000000.0f,
079                totalWaitTimeNS / 1000000.0f);
080    }
081}