92 lines
3.3 KiB
C#
92 lines
3.3 KiB
C#
// <copyright file="BaseGuildInfoPlugIn.cs" company="MUnique">
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// Licensed under the MIT License. See LICENSE file in the project root for full license information.
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// </copyright>
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namespace MUnique.OpenMU.GameServer.RemoteView.Guild;
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using System.Collections.Concurrent;
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using MUnique.OpenMU.GameLogic;
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using MUnique.OpenMU.GameLogic.Views.Guild;
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using MUnique.OpenMU.Interfaces;
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/// <summary>
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/// Abstract base class for a <see cref="IShowGuildInfoPlugIn" /> which allows to cache serialized guild infos.
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/// </summary>
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/// <typeparam name="T">The type of the actual <see cref="IShowGuildInfoPlugIn"/>. Required, so there is one cache per type.</typeparam>
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// ReSharper disable once UnusedTypeParameter we just use it to get type specific static fields.
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public abstract class BaseGuildInfoPlugIn<T>
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{
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/// <summary>
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/// The cache for already serialized guilds. This data doesn't change, but is requested often.
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/// </summary>
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// ReSharper disable once StaticMemberInGenericType That's what we want
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private static readonly ConcurrentDictionary<uint, Memory<byte>> Cache = new();
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// ReSharper disable once StaticMemberInGenericType That's what we want
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private static readonly HashSet<IGameServerContext> AppendedGuildDeletedSenders = new();
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/// <summary>
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/// Initializes a new instance of the <see cref="BaseGuildInfoPlugIn{T}"/> class.
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/// </summary>
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/// <param name="player">The player.</param>
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protected BaseGuildInfoPlugIn(RemotePlayer player)
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{
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this.Player = player;
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lock (AppendedGuildDeletedSenders)
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{
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if (AppendedGuildDeletedSenders.Add(player.GameServerContext))
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{
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// to make sure we just add one event handler
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this.Player.GameServerContext.GuildDeleted += OnGuildChanged;
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this.Player.GameServerContext.GuildChanged += OnGuildChanged;
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}
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}
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}
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/// <summary>
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/// Gets the player.
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/// </summary>
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/// <value>
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/// The player.
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/// </value>
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protected RemotePlayer Player { get; }
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/// <summary>
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/// Serializes the specified guild.
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/// </summary>
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/// <param name="guild">The guild.</param>
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/// <param name="guildId">The guild identifier.</param>
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/// <returns>The serialized guild data packet.</returns>
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protected abstract Memory<byte> Serialize(Guild guild, uint guildId);
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/// <summary>
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/// Returns the Guild Info Data of a Guild. It will either
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/// take the data out of the Cache, or get it from the database and serializes it.
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/// </summary>
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/// <param name="guildId">The id of the guild.</param>
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/// <returns>
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/// The data of the guild.
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/// </returns>
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protected async ValueTask<Memory<byte>> GetGuildDataAsync(uint guildId)
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{
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if (Cache.TryGetValue(guildId, out var guildInfo))
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{
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return guildInfo;
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}
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var guild = await this.Player.GameServerContext.GuildServer.GetGuildAsync(guildId).ConfigureAwait(false);
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if (guild is null)
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{
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return Memory<byte>.Empty;
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}
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var data = this.Serialize(guild, guildId);
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Cache.TryAdd(guildId, data);
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return data;
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}
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private static void OnGuildChanged(object? sender, GuildEventArgs args)
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{
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Cache.TryRemove(args.GuildId, out _);
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}
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} |