409 lines
11 KiB
C#
409 lines
11 KiB
C#
#region MIT License
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/*
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* WebSocketServiceManager.cs
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*
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* The MIT License
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*
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* Copyright (c) 2012-2013 sta.blockhead
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Timers;
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namespace WebSocketSharp.Server {
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/// <summary>
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/// Manages the collection of <see cref="WebSocketService"/> objects.
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/// </summary>
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public class WebSocketServiceManager {
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#region Fields
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private object _forSweep;
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private volatile bool _isStopped;
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private volatile bool _isSweeping;
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private Dictionary<string, WebSocketService> _services;
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private Timer _sweepTimer;
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private object _syncRoot;
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#endregion
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#region Constructor
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internal WebSocketServiceManager()
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{
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_forSweep = new object();
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_isStopped = false;
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_isSweeping = false;
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_services = new Dictionary<string, WebSocketService>();
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_syncRoot = new object();
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setSweepTimer();
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startSweepTimer();
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}
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#endregion
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#region Properties
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/// <summary>
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/// Gets the collection of IDs of active <see cref="WebSocketService"/> objects
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <value>
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/// An IEnumerable<string> that contains the collection of IDs of active <see cref="WebSocketService"/> objects.
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/// </value>
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public IEnumerable<string> ActiveIDs {
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get {
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return from result in Broadping(String.Empty)
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where result.Value
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select result.Key;
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}
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}
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/// <summary>
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/// Gets the number of <see cref="WebSocketService"/> objects
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <value>
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/// An <see cref="int"/> that contains the number of <see cref="WebSocketService"/> objects
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </value>
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public int Count {
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get {
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lock (_syncRoot)
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{
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return _services.Count;
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}
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}
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}
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/// <summary>
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/// Gets the collection of IDs of inactive <see cref="WebSocketService"/> objects
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <value>
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/// An IEnumerable<string> that contains the collection of IDs of inactive <see cref="WebSocketService"/> objects.
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/// </value>
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public IEnumerable<string> InactiveIDs {
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get {
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return from result in Broadping(String.Empty)
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where !result.Value
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select result.Key;
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}
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}
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/// <summary>
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/// Gets the collection of IDs of <see cref="WebSocketService"/> objects
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <value>
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/// An IEnumerable<string> that contains the collection of IDs of <see cref="WebSocketService"/> objects.
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/// </value>
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public IEnumerable<string> IDs {
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get {
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lock (_syncRoot)
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{
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return _services.Keys;
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}
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}
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}
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/// <summary>
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/// Gets a value indicating whether the <see cref="WebSocketServiceManager"/> cleans up
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/// the inactive <see cref="WebSocketService"/> objects periodically.
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/// </summary>
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/// <value>
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/// <c>true</c> if the <see cref="WebSocketServiceManager"/> cleans up the inactive <see cref="WebSocketService"/> objects
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/// every 60 seconds; otherwise, <c>false</c>.
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/// </value>
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public bool Sweeped {
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get {
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return _sweepTimer.Enabled;
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}
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internal set {
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if (value && !_isStopped)
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startSweepTimer();
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if (!value)
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stopSweepTimer();
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}
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}
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#endregion
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#region Private Methods
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private void broadcast(byte[] data)
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{
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lock (_syncRoot)
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{
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foreach (var service in _services.Values)
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service.Send(data);
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}
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}
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private void broadcast(string data)
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{
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lock (_syncRoot)
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{
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foreach (var service in _services.Values)
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service.Send(data);
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}
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}
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private void broadcastAsync(byte[] data)
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{
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var copied = copy();
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var services = copied.Values.GetEnumerator();
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Action completed = null;
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completed = () =>
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{
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if (services.MoveNext())
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services.Current.SendAsync(data, completed);
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};
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if (services.MoveNext())
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services.Current.SendAsync(data, completed);
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}
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private void broadcastAsync(string data)
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{
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var copied = copy();
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var services = copied.Values.GetEnumerator();
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Action completed = null;
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completed = () =>
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{
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if (services.MoveNext())
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services.Current.SendAsync(data, completed);
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};
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if (services.MoveNext())
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services.Current.SendAsync(data, completed);
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}
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private Dictionary<string, WebSocketService> copy()
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{
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lock (_syncRoot)
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{
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return new Dictionary<string, WebSocketService>(_services);
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}
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}
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private string createID()
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{
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return Guid.NewGuid().ToString("N");
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}
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private void setSweepTimer()
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{
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_sweepTimer = new Timer(60 * 1000);
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_sweepTimer.Elapsed += (sender, e) =>
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{
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Sweep();
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};
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}
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private void startSweepTimer()
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{
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if (!Sweeped)
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_sweepTimer.Start();
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}
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private void stop(ushort code, string reason, bool ignoreArgs)
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{
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stopSweepTimer();
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lock (_syncRoot)
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{
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if (_isStopped)
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return;
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_isStopped = true;
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foreach (var service in copy().Values)
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if (ignoreArgs)
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service.Stop();
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else
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service.Stop(code, reason);
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}
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}
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private void stopSweepTimer()
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{
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if (Sweeped)
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_sweepTimer.Stop();
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}
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#endregion
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#region Internal Methods
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internal string Add(WebSocketService service)
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{
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lock (_syncRoot)
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{
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if (_isStopped)
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return null;
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var id = createID();
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_services.Add(id, service);
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return id;
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}
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}
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internal bool Remove(string id)
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{
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lock (_syncRoot)
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{
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return _services.Remove(id);
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}
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}
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internal void Stop()
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{
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stop(0, null, true);
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}
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internal void Stop(ushort code, string reason)
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{
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stop(code, reason, false);
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}
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internal void Stop(CloseStatusCode code, string reason)
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{
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Stop((ushort)code, reason);
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}
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#endregion
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#region Public Methods
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/// <summary>
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/// Broadcasts the specified array of <see cref="byte"/> to the clients of every <see cref="WebSocketService"/>
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <param name="data">
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/// An array of <see cref="byte"/> to broadcast.
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/// </param>
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public void Broadcast(byte[] data)
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{
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if (_isStopped)
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broadcast(data);
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else
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broadcastAsync(data);
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}
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/// <summary>
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/// Broadcasts the specified <see cref="string"/> to the clients of every <see cref="WebSocketService"/>
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <param name="data">
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/// A <see cref="string"/> to broadcast.
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/// </param>
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public void Broadcast(string data)
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{
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if (_isStopped)
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broadcast(data);
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else
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broadcastAsync(data);
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}
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/// <summary>
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/// Pings with the specified <see cref="string"/> to the clients of every <see cref="WebSocketService"/>
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/// managed by the <see cref="WebSocketServiceManager"/>.
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/// </summary>
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/// <returns>
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/// A Dictionary<string, bool> that contains the collection of IDs and values
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/// indicating whether each <see cref="WebSocketService"/> received a Pong in a time.
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/// </returns>
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/// <param name="message">
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/// A <see cref="string"/> that contains a message.
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/// </param>
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public Dictionary<string, bool> Broadping(string message)
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{
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var result = new Dictionary<string, bool>();
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foreach (var session in copy())
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result.Add(session.Key, session.Value.Ping(message));
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return result;
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}
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/// <summary>
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/// Cleans up the inactive <see cref="WebSocketService"/> objects.
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/// </summary>
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public void Sweep()
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{
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if (_isStopped || _isSweeping || Count == 0)
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return;
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lock (_forSweep)
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{
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_isSweeping = true;
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foreach (var id in InactiveIDs)
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{
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lock (_syncRoot)
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{
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if (_isStopped)
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{
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_isSweeping = false;
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return;
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}
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WebSocketService service;
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if (TryGetWebSocketService(id, out service))
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service.Stop(CloseStatusCode.ABNORMAL, String.Empty);
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}
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}
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_isSweeping = false;
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}
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}
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/// <summary>
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/// Tries to get the <see cref="WebSocketService"/> associated with the specified <paramref name="id"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the <see cref="WebSocketServiceManager"/> manages the <see cref="WebSocketService"/> with the specified <paramref name="id"/>; otherwise, <c>false</c>.
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/// </returns>
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/// <param name="id">
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/// A <see cref="string"/> that contains the ID to find.
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/// </param>
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/// <param name="service">
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/// When this method returns, contains the <see cref="WebSocketService"/> with the specified <paramref name="id"/>, if the <paramref name="id"/> is found; otherwise, <see langword="null"/>.
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/// </param>
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public bool TryGetWebSocketService(string id, out WebSocketService service)
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{
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lock (_syncRoot)
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{
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return _services.TryGetValue(id, out service);
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}
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}
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#endregion
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}
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}
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