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Back to a single connection

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This commit is contained in:
Bond-009
2019-03-11 22:33:27 +01:00
committed by Bond_009
parent 30842656a7
commit 27c29bbb4c
10 changed files with 30 additions and 88 deletions
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94
Emby.Server.Implementations/Data/BaseSqliteRepository.cs
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@@ -1,9 +1,7 @@
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using SQLitePCL;
using SQLitePCL.pretty;
@@ -33,8 +31,6 @@ namespace Emby.Server.Implementations.Data
private SQLiteDatabaseConnection WriteConnection;
private readonly BlockingCollection<SQLiteDatabaseConnection> ReadConnectionPool = new BlockingCollection<SQLiteDatabaseConnection>();
static BaseSqliteRepository()
{
ThreadSafeMode = raw.sqlite3_threadsafe();
@@ -43,70 +39,37 @@ namespace Emby.Server.Implementations.Data
private string _defaultWal;
protected async Task CreateConnections()
{
await WriteLock.WaitAsync().ConfigureAwait(false);
try
{
if (WriteConnection == null)
{
WriteConnection = SQLite3.Open(
DbFilePath,
DefaultConnectionFlags | ConnectionFlags.Create | ConnectionFlags.ReadWrite,
null);
}
if (string.IsNullOrWhiteSpace(_defaultWal))
{
_defaultWal = WriteConnection.Query("PRAGMA journal_mode").SelectScalarString().First();
Logger.LogInformation("Default journal_mode for {0} is {1}", DbFilePath, _defaultWal);
}
if (EnableTempStoreMemory)
{
WriteConnection.Execute("PRAGMA temp_store = memory");
}
else
{
WriteConnection.Execute("PRAGMA temp_store = file");
}
}
catch
{
throw;
}
finally
{
WriteLock.Release();
}
// Add one reading connection for each thread
int threads = System.Environment.ProcessorCount;
for (int i = 0; i <= threads; i++)
{
ReadConnectionPool.Add(SQLite3.Open(DbFilePath, DefaultConnectionFlags | ConnectionFlags.ReadOnly, null));
}
}
protected ManagedConnection GetConnection(bool isReadOnly = false)
{
if (isReadOnly)
WriteLock.Wait();
if (WriteConnection != null)
{
return new ManagedConnection(ReadConnectionPool.Take(), ReadConnectionPool);
return new ManagedConnection(WriteConnection, WriteLock);
}
WriteConnection = SQLite3.Open(
DbFilePath,
DefaultConnectionFlags | ConnectionFlags.Create | ConnectionFlags.ReadWrite,
null);
if (string.IsNullOrWhiteSpace(_defaultWal))
{
_defaultWal = WriteConnection.Query("PRAGMA journal_mode").SelectScalarString().First();
Logger.LogInformation("Default journal_mode for {0} is {1}", DbFilePath, _defaultWal);
}
if (EnableTempStoreMemory)
{
WriteConnection.Execute("PRAGMA temp_store = memory");
}
else
{
if (WriteConnection == null)
{
throw new InvalidOperationException("Can't access the write connection at this time.");
}
WriteLock.Wait();
return new ManagedConnection(WriteConnection, WriteLock);
WriteConnection.Execute("PRAGMA temp_store = file");
}
return new ManagedConnection(WriteConnection, WriteLock);
}
public IStatement PrepareStatement(ManagedConnection connection, string sql)
@@ -217,14 +180,11 @@ namespace Emby.Server.Implementations.Data
WriteLock.Release();
}
foreach (var i in ReadConnectionPool)
{
i.Dispose();
}
ReadConnectionPool.Dispose();
WriteLock.Dispose();
}
WriteConnection = null;
_disposed = true;
}