This package provides instrumentation for AWS Lambda functions writen in .NET for collection of distributed tracing and performence monitoring.

Using .NET CLI:

$ dotnet add package Epsagon.Dotnet.Lambda

Using PackageReference in a *.csproj file:

Follow instructions here.

• Set the following environment variables:
  • EPSAGON_TOKEN - Epsagon's token, can be found in the Dashboard
  • EPSAGON_APP_NAME - Name for the application of this function (optional)
• Generate a new AWS Lambda Function project (For more info)
• Add Epsagon.Dotnet.Lambda package to your project

• Modify your Lambda Function Handler (usually found in Function.cs) like so:

// handling S3 invoked lambda
public class Function : LambdaHandler<S3Event, string> // LambdaHandler<TEvent, TRes>
{
    public override string HandlerFunction(S3Event input, ILambdaContext context)
    {
        return "Hello from Epsagon!";
    }
}

• Change the function-handler in your project's aws-lambda-tools-defaults.json to be EpsagonEnabledHandler (see demo for more info)
• And that's it!

• Add a call to EpsagonBootstrap.Bootstrap() in the constructor of your lambda
• Invoke EpsagonHandler.Handle to instrument your function like so:

public class FunctionClass {
    public FunctionClass() {
        EpsagonBootstrap.Bootstrap();
    }

    public string MyHandler(S3Event input, ILambdaContext context) {
        return EpsagonHandler.Handle(input, context, () => {
            // your code is here...
        });
    }

    // Can be async as well
    public Task<string> MyAsyncHandler(S3Event input, ILambdaContext context) {
        return EpsagonHandler.Handle(input, context, async () => {
            // your async code is here
        });
    }
}

• And that's it!

Provided under the MIT license. See LICENSE for details.

Copyright 2019, Epsagon