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Use background service semaphore

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Must have missed it the first time...
This commit is contained in:
Noi 2022-11-21 19:17:07 -08:00
parent a9853021f4
commit e62a89d0a0
1 changed files with 16 additions and 7 deletions
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21
BackgroundServices/AutoUserDownload.cs
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@ -1,7 +1,7 @@
using BirthdayBot.Data;
using Microsoft.EntityFrameworkCore;
namespace BirthdayBot.BackgroundServices;
/// <summary>
/// Proactively fills the user cache for guilds in which any birthday data already exists.
/// </summary>
@ -9,14 +9,23 @@ class AutoUserDownload : BackgroundService {
public AutoUserDownload(ShardInstance instance) : base(instance) { }
public override async Task OnTick(int tickCount, CancellationToken token) {
using var db = new BotDatabaseContext();
// Take action if a guild's cache is incomplete...
var incompleteCaches = ShardInstance.DiscordClient.Guilds.Where(g => !g.HasAllMembers).Select(g => (long)g.Id).ToHashSet();
// ...and if the guild contains any user data
var mustFetch = db.UserEntries.Where(e => incompleteCaches.Contains(e.GuildId)).Select(e => e.GuildId).Distinct();
IEnumerable<long> mustFetch;
try {
await DbConcurrentOperationsLock.WaitAsync(token);
using var db = new BotDatabaseContext();
mustFetch = db.UserEntries.AsNoTracking()
.Where(e => incompleteCaches.Contains(e.GuildId)).Select(e => e.GuildId).Distinct()
.ToList();
} finally {
try {
DbConcurrentOperationsLock.Release();
} catch (ObjectDisposedException) { }
}
int processed = 0;
var processed = 0;
foreach (var item in mustFetch) {
// May cause a disconnect in certain situations. Cancel all further attempts until the next pass if it happens.
if (ShardInstance.DiscordClient.ConnectionState != ConnectionState.Connected) break;
@ -28,6 +37,6 @@ class AutoUserDownload : BackgroundService {
processed++;
}
if (processed > 100) Log($"Explicit user list request processed for {processed} guild(s).");
if (processed > 25) Log($"Explicit user list request processed for {processed} guild(s).");
}
}