feat(bot): add Redis cache

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spiral 2022-04-13 08:44:53 -04:00
parent fadf007abc
commit c2094e3b7a
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9 changed files with 560 additions and 1 deletions

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@ -0,0 +1,346 @@
using Google.Protobuf;
using StackExchange.Redis;
using StackExchange.Redis.KeyspaceIsolation;
using Serilog;
using Myriad.Types;
namespace Myriad.Cache;
#pragma warning disable 4014
public class RedisDiscordCache : IDiscordCache
{
private readonly ILogger _logger;
public RedisDiscordCache(ILogger logger)
{
_logger = logger;
}
private ConnectionMultiplexer _redis { get; set; }
private ulong _ownUserId { get; set; }
public async Task InitAsync(string addr, ulong ownUserId)
{
_redis = await ConnectionMultiplexer.ConnectAsync(addr);
_ownUserId = ownUserId;
}
private IDatabase db => _redis.GetDatabase().WithKeyPrefix("discord:");
public async ValueTask SaveGuild(Guild guild)
{
_logger.Verbose("Saving guild {GuildId} to redis", guild.Id);
var g = new CachedGuild();
g.Id = guild.Id;
g.Name = guild.Name;
g.OwnerId = guild.OwnerId;
g.PremiumTier = (int) guild.PremiumTier;
var tr = db.CreateTransaction();
tr.HashSetAsync("guilds", guild.Id.HashWrapper(g));
foreach (var role in guild.Roles)
{
// Don't call SaveRole because that updates guild state
// and we just got a brand new one :)
// actually with redis it doesn't update guild state, but we're still doing it here because transaction
tr.HashSetAsync("roles", role.Id.HashWrapper(new CachedRole()
{
Id = role.Id,
Name = role.Name,
Position = role.Position,
Permissions = (ulong) role.Permissions,
Mentionable = role.Mentionable,
}));
tr.HashSetAsync($"guild_roles:{guild.Id}", role.Id, true, When.NotExists);
}
await tr.ExecuteAsync();
}
public async ValueTask SaveChannel(Channel channel)
{
_logger.Verbose("Saving channel {ChannelId} to redis", channel.Id);
await db.HashSetAsync("channels", channel.Id.HashWrapper(channel.ToProtobuf()));
if (channel.GuildId != null)
await db.HashSetAsync($"guild_channels:{channel.GuildId.Value}", channel.Id, true, When.NotExists);
// todo: use a transaction for this?
if (channel.Recipients != null)
foreach (var recipient in channel.Recipients)
await SaveUser(recipient);
}
public ValueTask SaveOwnUser(ulong userId)
{
// we get the own user ID in InitAsync, so no need to save it here
return default;
}
public async ValueTask SaveUser(User user)
{
_logger.Verbose("Saving user {UserId} to redis", user.Id);
var u = new CachedUser()
{
Id = user.Id,
Username = user.Username,
Discriminator = user.Discriminator,
Bot = user.Bot,
};
if (user.Avatar != null)
u.Avatar = user.Avatar;
await db.HashSetAsync("users", user.Id.HashWrapper(u));
}
public async ValueTask SaveSelfMember(ulong guildId, GuildMemberPartial member)
{
_logger.Verbose("Saving self member for guild {GuildId} to redis", guildId);
var gm = new CachedGuildMember();
foreach (var role in member.Roles)
gm.Roles.Add(role);
await db.HashSetAsync("members", guildId.HashWrapper(gm));
}
public async ValueTask SaveRole(ulong guildId, Myriad.Types.Role role)
{
_logger.Verbose("Saving role {RoleId} in {GuildId} to redis", role.Id, guildId);
await db.HashSetAsync("roles", role.Id.HashWrapper(new CachedRole()
{
Id = role.Id,
Mentionable = role.Mentionable,
Name = role.Name,
Permissions = (ulong) role.Permissions,
Position = role.Position,
}));
await db.HashSetAsync($"guild_roles:{guildId}", role.Id, true, When.NotExists);
}
public async ValueTask SaveDmChannelStub(ulong channelId)
{
// Use existing channel object if present, otherwise add a stub
// We may get a message create before channel create and we want to have it saved
if (await TryGetChannel(channelId) == null)
await db.HashSetAsync("channels", channelId.HashWrapper(new CachedChannel()
{
Id = channelId,
Type = (int) Channel.ChannelType.Dm,
}));
}
public async ValueTask RemoveGuild(ulong guildId)
=> await db.HashDeleteAsync("guilds", guildId);
public async ValueTask RemoveChannel(ulong channelId)
{
var oldChannel = await TryGetChannel(channelId);
if (oldChannel == null)
return;
await db.HashDeleteAsync("channels", channelId);
if (oldChannel.GuildId != null)
await db.HashDeleteAsync($"guild_channels:{oldChannel.GuildId.Value}", oldChannel.Id);
}
public async ValueTask RemoveUser(ulong userId)
=> await db.HashDeleteAsync("users", userId);
// todo: try getting this from redis if we don't have it yet
public Task<ulong> GetOwnUser() => Task.FromResult(_ownUserId);
public async ValueTask RemoveRole(ulong guildId, ulong roleId)
{
await db.HashDeleteAsync("roles", roleId);
await db.HashDeleteAsync($"guild_roles:{guildId}", roleId);
}
public async Task<Guild?> TryGetGuild(ulong guildId)
{
var redisGuild = await db.HashGetAsync("guilds", guildId);
if (redisGuild.IsNullOrEmpty)
return null;
var guild = ((byte[])redisGuild).Unmarshal<CachedGuild>();
var redisRoles = await db.HashGetAllAsync($"guild_roles:{guildId}");
// todo: put this in a transaction or something
var roles = await Task.WhenAll(redisRoles.Select(r => TryGetRole((ulong)r.Name)));
#pragma warning disable 8619
return guild.FromProtobuf() with { Roles = roles } ;
#pragma warning restore 8619
}
public async Task<Channel?> TryGetChannel(ulong channelId)
{
var redisChannel = await db.HashGetAsync("channels", channelId);
if (redisChannel.IsNullOrEmpty)
return null;
return ((byte[])redisChannel).Unmarshal<CachedChannel>().FromProtobuf();
}
public async Task<User?> TryGetUser(ulong userId)
{
var redisUser = await db.HashGetAsync("users", userId);
if (redisUser.IsNullOrEmpty)
return null;
return ((byte[])redisUser).Unmarshal<CachedUser>().FromProtobuf();
}
public async Task<GuildMemberPartial?> TryGetSelfMember(ulong guildId)
{
var redisMember = await db.HashGetAsync("members", guildId);
if (redisMember.IsNullOrEmpty)
return null;
return new GuildMemberPartial()
{
Roles = ((byte[])redisMember).Unmarshal<CachedGuildMember>().Roles.ToArray()
};
}
public async Task<Myriad.Types.Role?> TryGetRole(ulong roleId)
{
var redisRole = await db.HashGetAsync("roles", roleId);
if (redisRole.IsNullOrEmpty)
return null;
var role = ((byte[])redisRole).Unmarshal<CachedRole>();
return new Myriad.Types.Role()
{
Id = role.Id,
Name = role.Name,
Position = role.Position,
Permissions = (PermissionSet) role.Permissions,
Mentionable = role.Mentionable,
};
}
public IAsyncEnumerable<Guild> GetAllGuilds()
{
// return _guilds.Values
// .Select(g => g.Guild)
// .ToAsyncEnumerable();
return new Guild[] {}.ToAsyncEnumerable();
}
public async Task<IEnumerable<Channel>> GetGuildChannels(ulong guildId)
{
var redisChannels = await db.HashGetAllAsync($"guild_channels:{guildId}");
if (redisChannels.Length == 0)
throw new ArgumentException("Guild not found", nameof(guildId));
#pragma warning disable 8619
return await Task.WhenAll(redisChannels.Select(c => TryGetChannel((ulong) c.Name)));
#pragma warning restore 8619
}
}
internal static class CacheProtoExt
{
public static Guild FromProtobuf(this CachedGuild guild)
=> new Guild()
{
Id = guild.Id,
Name = guild.Name,
OwnerId = guild.OwnerId,
PremiumTier = (PremiumTier) guild.PremiumTier,
};
public static CachedChannel ToProtobuf(this Channel channel)
{
var c = new CachedChannel();
c.Id = channel.Id;
c.Type = (int) channel.Type;
if (channel.Position != null)
c.Position = channel.Position.Value;
c.Name = channel.Name;
if (channel.PermissionOverwrites != null)
foreach (var overwrite in channel.PermissionOverwrites)
c.PermissionOverwrites.Add(new Overwrite() {
Id = overwrite.Id,
Type = (int) overwrite.Type,
Allow = (ulong) overwrite.Allow,
Deny = (ulong) overwrite.Deny,
});
if (channel.GuildId != null)
c.GuildId = channel.GuildId.Value;
return c;
}
public static Channel FromProtobuf(this CachedChannel channel)
=> new Channel()
{
Id = channel.Id,
Type = (Channel.ChannelType) channel.Type,
Position = channel.Position,
Name = channel.Name,
PermissionOverwrites = channel.PermissionOverwrites
.Select(x => new Channel.Overwrite()
{
Id = x.Id,
Type = (Channel.OverwriteType) x.Type,
Allow = (PermissionSet) x.Allow,
Deny = (PermissionSet) x.Deny,
}).ToArray(),
GuildId = channel.HasGuildId ? channel.GuildId : null,
ParentId = channel.HasParentId ? channel.ParentId : null,
};
public static User FromProtobuf(this CachedUser user)
=> new User()
{
Id = user.Id,
Username = user.Username,
Discriminator = user.Discriminator,
Avatar = user.HasAvatar ? user.Avatar : null,
Bot = user.Bot,
};
}
internal static class RedisExt
{
// convenience method
public static HashEntry[] HashWrapper<T>(this ulong key, T value) where T : IMessage
=> new[] { new HashEntry(key, value.ToByteArray()) };
}
public static class ProtobufExt
{
private static Dictionary<string, MessageParser> _parser = new();
public static byte[] Marshal(this IMessage message) => message.ToByteArray();
public static T Unmarshal<T>(this byte[] message) where T : IMessage<T>, new()
{
var type = typeof(T).ToString();
if (_parser.ContainsKey(type))
return (T)_parser[type].ParseFrom(message);
else
{
_parser.Add(type, new MessageParser<T>(() => new T()));
return Unmarshal<T>(message);
}
}
}

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@ -21,6 +21,9 @@
</PropertyGroup> </PropertyGroup>
<ItemGroup> <ItemGroup>
<PackageReference Include="Google.Protobuf" Version="3.13.0"/>
<PackageReference Include="Grpc.Net.ClientFactory" Version="2.32.0" />
<PackageReference Include="Grpc.Tools" Version="2.37.0" PrivateAssets="All"/>
<PackageReference Include="Polly" Version="7.2.1"/> <PackageReference Include="Polly" Version="7.2.1"/>
<PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1"/> <PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1"/>
<PackageReference Include="Serilog" Version="2.10.0"/> <PackageReference Include="Serilog" Version="2.10.0"/>
@ -28,4 +31,7 @@
<PackageReference Include="System.Linq.Async" Version="5.0.0"/> <PackageReference Include="System.Linq.Async" Version="5.0.0"/>
</ItemGroup> </ItemGroup>
<ItemGroup>
<Protobuf Include="../proto/discord_cache.proto" GrpcServices="Client" Link="Protos/discord_cache.proto"/>
</ItemGroup>
</Project> </Project>

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@ -2,6 +2,32 @@
"version": 1, "version": 1,
"dependencies": { "dependencies": {
"net6.0": { "net6.0": {
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"type": "Direct",
"requested": "[3.13.0, )",
"resolved": "3.13.0",
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"dependencies": {
"System.Memory": "4.5.2",
"System.Runtime.CompilerServices.Unsafe": "4.5.2"
}
},
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"dependencies": {
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}
},
"Grpc.Tools": {
"type": "Direct",
"requested": "[2.37.0, )",
"resolved": "2.37.0",
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},
"Polly": { "Polly": {
"type": "Direct", "type": "Direct",
"requested": "[7.2.1, )", "requested": "[7.2.1, )",
@ -36,6 +62,109 @@
"resolved": "5.0.0", "resolved": "5.0.0",
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}, },
"Grpc.Core.Api": {
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"dependencies": {
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},
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"dependencies": {
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},
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"type": "Transitive", "type": "Transitive",
"resolved": "5.0.0", "resolved": "5.0.0",
@ -75,6 +204,11 @@
"System.Security.Permissions": "5.0.0" "System.Security.Permissions": "5.0.0"
} }
}, },
"System.Diagnostics.DiagnosticSource": {
"type": "Transitive",
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},
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@ -99,6 +233,16 @@
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"System.Security.AccessControl": { "System.Security.AccessControl": {
"type": "Transitive", "type": "Transitive",
"resolved": "5.0.0", "resolved": "5.0.0",

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@ -20,6 +20,7 @@ public class BotConfig
public string? GatewayQueueUrl { get; set; } public string? GatewayQueueUrl { get; set; }
public bool UseRedisRatelimiter { get; set; } = false; public bool UseRedisRatelimiter { get; set; } = false;
public bool UseRedisCache { get; set; } = false;
public string? RedisGatewayUrl { get; set; } public string? RedisGatewayUrl { get; set; }

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@ -2,6 +2,7 @@ using Autofac;
using Microsoft.Extensions.Configuration; using Microsoft.Extensions.Configuration;
using Myriad.Cache;
using Myriad.Gateway; using Myriad.Gateway;
using Myriad.Types; using Myriad.Types;
using Myriad.Rest; using Myriad.Rest;
@ -51,6 +52,10 @@ public class Init
if (config.UseRedisRatelimiter) if (config.UseRedisRatelimiter)
await redis.InitAsync(coreConfig); await redis.InitAsync(coreConfig);
var cache = services.Resolve<IDiscordCache>();
if (cache is RedisDiscordCache)
await (cache as RedisDiscordCache).InitAsync(coreConfig.RedisAddr, config.ClientId!.Value);
if (config.Cluster == null) if (config.Cluster == null)
{ {
// "Connect to the database" (ie. set off database migrations and ensure state) // "Connect to the database" (ie. set off database migrations and ensure state)

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@ -44,7 +44,13 @@ public class BotModule: Module
}).AsSelf().SingleInstance(); }).AsSelf().SingleInstance();
builder.RegisterType<Cluster>().AsSelf().SingleInstance(); builder.RegisterType<Cluster>().AsSelf().SingleInstance();
builder.RegisterType<RedisGatewayService>().AsSelf().SingleInstance(); builder.RegisterType<RedisGatewayService>().AsSelf().SingleInstance();
builder.Register(c => { return new MemoryDiscordCache(); }).AsSelf().As<IDiscordCache>().SingleInstance(); builder.Register<IDiscordCache>(c => {
var botConfig = c.Resolve<BotConfig>();
if (botConfig.UseRedisCache)
return new RedisDiscordCache(c.Resolve<ILogger>());
return new MemoryDiscordCache();
}).AsSelf().SingleInstance();
builder.RegisterType<PrivateChannelService>().AsSelf().SingleInstance(); builder.RegisterType<PrivateChannelService>().AsSelf().SingleInstance();
builder.Register(c => builder.Register(c =>

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@ -1520,6 +1520,8 @@
"myriad": { "myriad": {
"type": "Project", "type": "Project",
"dependencies": { "dependencies": {
"Google.Protobuf": "3.13.0",
"Grpc.Net.ClientFactory": "2.32.0",
"Polly": "7.2.1", "Polly": "7.2.1",
"Polly.Contrib.WaitAndRetry": "1.1.1", "Polly.Contrib.WaitAndRetry": "1.1.1",
"Serilog": "2.10.0", "Serilog": "2.10.0",

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@ -2063,6 +2063,8 @@
"myriad": { "myriad": {
"type": "Project", "type": "Project",
"dependencies": { "dependencies": {
"Google.Protobuf": "3.13.0",
"Grpc.Net.ClientFactory": "2.32.0",
"Polly": "7.2.1", "Polly": "7.2.1",
"Polly.Contrib.WaitAndRetry": "1.1.1", "Polly.Contrib.WaitAndRetry": "1.1.1",
"Serilog": "2.10.0", "Serilog": "2.10.0",

47
proto/discord_cache.proto Normal file
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@ -0,0 +1,47 @@
syntax = "proto3";
package myriad.cache;
message Overwrite {
uint64 id = 1;
int32 type = 2;
uint64 allow = 3;
uint64 deny = 4;
}
message CachedChannel {
uint64 id = 1;
int32 type = 2;
int32 position = 3;
string name = 4;
repeated Overwrite permission_overwrites = 5;
optional uint64 guild_id = 6;
optional uint64 parent_id = 7;
}
message CachedGuildMember {
repeated uint64 roles = 1;
}
message CachedGuild {
uint64 id = 1;
string name = 2;
uint64 owner_id = 3;
int32 premium_tier = 4;
}
message CachedRole {
uint64 id = 1;
string name = 2;
int32 position = 3;
uint64 permissions = 4;
bool mentionable = 5;
}
message CachedUser {
uint64 id = 1;
string username = 2;
string discriminator = 3;
optional string avatar = 4;
bool bot = 5;
}