/// <summary>
/// execute as an asynchronous operation.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">The state.</param>
/// <returns>Task.</returns>
protected override async Task <int?> ExecuteAsync(OperationExecutionToken <SQLiteConnection, SQLiteTransaction> executionToken, OperationImplementationAsync <SQLiteConnection, SQLiteTransaction> implementation, CancellationToken cancellationToken, object?state)
{
if (executionToken == null)
{
throw new ArgumentNullException(nameof(executionToken), $"{nameof(executionToken)} is null.");
}
if (implementation == null)
{
throw new ArgumentNullException(nameof(implementation), $"{nameof(implementation)} is null.");
}
var mode = DisableLocks ? LockType.None : (executionToken as SQLiteOperationExecutionToken)?.LockType ?? LockType.Write;
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
IDisposable?lockToken = null;
try
{
switch (mode)
{
case LockType.Read: lockToken = await SyncLock.ReaderLockAsync().ConfigureAwait(false); break;
case LockType.Write: lockToken = await SyncLock.WriterLockAsync().ConfigureAwait(false); break;
}
var rows = await implementation(m_Connection, m_Transaction, cancellationToken).ConfigureAwait(false);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return(rows);
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert SQLiteException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
finally
{
if (lockToken != null)
{
lockToken.Dispose();
}
}
}
/// <summary>
/// Executes the operation asynchronously.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation that handles processing the result of the command.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">User supplied state.</param>
/// <returns>Task.</returns>
/// <exception cref="NotImplementedException"></exception>
protected override async Task <int?> ExecuteAsync(CommandExecutionToken <SQLiteCommand, SQLiteParameter> executionToken, CommandImplementationAsync <SQLiteCommand> implementation, CancellationToken cancellationToken, object?state)
{
if (executionToken == null)
{
throw new ArgumentNullException(nameof(executionToken), $"{nameof(executionToken)} is null.");
}
if (implementation == null)
{
throw new ArgumentNullException(nameof(implementation), $"{nameof(implementation)} is null.");
}
var mode = DisableLocks ? LockType.None : (executionToken as SQLiteCommandExecutionToken)?.LockType ?? LockType.Write;
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
IDisposable?lockToken = null;
try
{
switch (mode)
{
case LockType.Read: lockToken = await SyncLock.ReaderLockAsync().ConfigureAwait(false); break;
case LockType.Write: lockToken = await SyncLock.WriterLockAsync().ConfigureAwait(false); break;
}
using (var cmd = new SQLiteCommand())
{
cmd.Connection = m_Connection;
if (m_Transaction != null)
{
cmd.Transaction = m_Transaction;
}
if (DefaultCommandTimeout.HasValue)
{
cmd.CommandTimeout = (int)DefaultCommandTimeout.Value.TotalSeconds;
}
cmd.CommandText = executionToken.CommandText;
cmd.CommandType = executionToken.CommandType;
foreach (var param in executionToken.Parameters)
{
cmd.Parameters.Add(param);
}
executionToken.ApplyCommandOverrides(cmd);
var rows = await implementation(cmd).ConfigureAwait(false);
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return(rows);
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert SQLiteException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
finally
{
if (lockToken != null)
{
lockToken.Dispose();
}
}
}