internal async Task InvokeOnceAsync(CancellationToken cancellationToken = default)
{
using (var invocation = await Client.GetNextInvocationAsync(cancellationToken))
{
InvocationResponse response = null;
bool invokeSucceeded = false;
try
{
response = await _handler(invocation);
invokeSucceeded = true;
}
catch (Exception exception)
{
await Client.ReportInvocationErrorAsync(invocation.LambdaContext.AwsRequestId, exception);
}
if (invokeSucceeded)
{
try
{
await Client.SendResponseAsync(invocation.LambdaContext.AwsRequestId, response?.OutputStream);
}
finally
{
if (response != null && response.DisposeOutputStream)
{
response.OutputStream?.Dispose();
}
}
}
}
}
/// <summary>
/// Get a HandlerWrapper that will call the given delegate on function invocation.
/// </summary>
/// <param name="invokeDelegate">Action called for each invocation of the Lambda function</param>
/// <returns>A HandlerWrapper</returns>
public static HandlerWrapper GetHandlerWrapper(Action <Stream, ILambdaContext, MemoryStream> invokeDelegate)
{
var handlerWrapper = new HandlerWrapper();
handlerWrapper.Handler = invocation =>
{
handlerWrapper.OutputStream.SetLength(0);
invokeDelegate(invocation.InputStream, invocation.LambdaContext, handlerWrapper.OutputStream);
handlerWrapper.OutputStream.Position = 0;
var response = new InvocationResponse(handlerWrapper.OutputStream, false);
return(Task.FromResult(response));
};
return(handlerWrapper);
}
internal async Task InvokeOnceAsync(CancellationToken cancellationToken = default)
{
this._logger.LogInformation($"Starting InvokeOnceAsync");
using (var invocation = await Client.GetNextInvocationAsync(cancellationToken))
{
InvocationResponse response = null;
bool invokeSucceeded = false;
try
{
this._logger.LogInformation($"Starting invoking handler");
response = await _handler(invocation);
invokeSucceeded = true;
}
catch (Exception exception)
{
WriteUnhandledExceptionToLog(exception);
await Client.ReportInvocationErrorAsync(invocation.LambdaContext.AwsRequestId, exception);
}
finally
{
this._logger.LogInformation($"Finished invoking handler");
}
if (invokeSucceeded)
{
this._logger.LogInformation($"Starting sending response");
try
{
await Client.SendResponseAsync(invocation.LambdaContext.AwsRequestId, response?.OutputStream);
}
finally
{
if (response != null && response.DisposeOutputStream)
{
response.OutputStream?.Dispose();
}
this._logger.LogInformation($"Finished sending response");
}
}
this._logger.LogInformation($"Finished InvokeOnceAsync");
}
}