135 lines
4.1 KiB
C#
135 lines
4.1 KiB
C#
#nullable enable
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using System.Data;
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using System.Data.Common;
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using System.Diagnostics.CodeAnalysis;
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using App.Metrics;
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using NodaTime;
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using Npgsql;
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using Serilog;
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namespace PluralKit.Core;
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internal class PKCommand: DbCommand, IPKCommand
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{
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private readonly ILogger _logger;
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private readonly IMetrics _metrics;
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private readonly PKConnection _ourConnection;
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public PKCommand(NpgsqlCommand inner, PKConnection ourConnection, ILogger logger, IMetrics metrics)
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{
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Inner = inner;
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_ourConnection = ourConnection;
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_logger = logger.ForContext<PKCommand>();
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_metrics = metrics;
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}
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private NpgsqlCommand Inner { get; }
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protected override DbParameterCollection DbParameterCollection => Inner.Parameters;
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protected override DbTransaction? DbTransaction
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{
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get => Inner.Transaction;
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set => Inner.Transaction = value switch
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{
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NpgsqlTransaction npg => npg,
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PKTransaction pk => pk.Inner,
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_ => throw new ArgumentException($"Can't convert input type {value?.GetType()} to NpgsqlTransaction")
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};
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}
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public override bool DesignTimeVisible
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{
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get => Inner.DesignTimeVisible;
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set => Inner.DesignTimeVisible = value;
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}
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protected override DbConnection? DbConnection
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{
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get => Inner.Connection;
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set =>
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Inner.Connection = value switch
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{
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NpgsqlConnection npg => npg,
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PKConnection pk => pk.Inner,
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_ => throw new ArgumentException($"Can't convert input type {value?.GetType()} to NpgsqlConnection")
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};
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}
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public override Task<int> ExecuteNonQueryAsync(CancellationToken ct) =>
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LogQuery(Inner.ExecuteNonQueryAsync(ct));
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public override Task<object?> ExecuteScalarAsync(CancellationToken ct) =>
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LogQuery(Inner.ExecuteScalarAsync(ct));
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public override Task PrepareAsync(CancellationToken ct = default) => Inner.PrepareAsync(ct);
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public override void Cancel() => Inner.Cancel();
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[AllowNull]
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public override string CommandText
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{
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get => Inner.CommandText;
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set => Inner.CommandText = value;
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}
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public override int CommandTimeout
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{
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get => Inner.CommandTimeout;
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set => Inner.CommandTimeout = value;
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}
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public override CommandType CommandType
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{
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get => Inner.CommandType;
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set => Inner.CommandType = value;
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}
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public override UpdateRowSource UpdatedRowSource
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{
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get => Inner.UpdatedRowSource;
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set => Inner.UpdatedRowSource = value;
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}
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public override int ExecuteNonQuery() => throw SyncError(nameof(ExecuteNonQuery));
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public override object ExecuteScalar() => throw SyncError(nameof(ExecuteScalar));
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public override void Prepare() => throw SyncError(nameof(Prepare));
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protected override async Task<DbDataReader>
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ExecuteDbDataReaderAsync(CommandBehavior behavior, CancellationToken ct) =>
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await LogQuery(Inner.ExecuteReaderAsync(behavior, ct));
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protected override DbParameter CreateDbParameter() => Inner.CreateParameter();
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protected override DbDataReader ExecuteDbDataReader(CommandBehavior behavior) =>
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throw SyncError(nameof(ExecuteDbDataReader));
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private async Task<T> LogQuery<T>(Task<T> task)
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{
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var start = SystemClock.Instance.GetCurrentInstant();
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try
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{
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return await task;
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}
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finally
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{
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var end = SystemClock.Instance.GetCurrentInstant();
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var elapsed = end - start;
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_logger.Verbose("Executed query {Query} in {ElapsedTime} on connection {ConnectionId}", CommandText,
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elapsed, _ourConnection.ConnectionId);
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// One "BCL compatible tick" is 100 nanoseconds
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var micros = elapsed.BclCompatibleTicks / 10;
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_metrics.Provider.Timer.Instance(CoreMetrics.DatabaseQuery, new MetricTags("query", CommandText))
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.Record(micros, TimeUnit.Microseconds, CommandText);
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}
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}
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private static Exception SyncError(string caller) =>
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throw new Exception($"Executed synchronous IDbCommand function {caller}!");
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} |