DebugSample

LambdaSharp Debug Logging

Before you begin, make sure to setup your LambdaSharp CLI.

Function Code

The ALambdaFunction base class defines the LogDebug(string format, params object[] arguments) method, which only logs when DebugLoggingEnabled is true. For more complex logging, it is recommend to first check DebugLoggingEnabled before constructing an expensive log statement that will be discarded.

public sealed class Function : ALambdaFunction<FunctionRequest, FunctionResponse> {

    //--- Methods ---
    public override async Task InitializeAsync(LambdaConfig config) { }

    public override async Task<FunctionResponse> ProcessMessageAsync(FunctionRequest request) {

        // LogDebug() is only emitted to the logs when the DEBUG_LOGGING_ENABLED environment variable is set
        LogDebug("this will only show if DEBUG_LOGGING_ENABLED environment variable is set");

        // to avoid unnecessary overhead, check if debug logging is enabled before constructing debug output
        if(DebugLoggingEnabled) {
            LogDebug("more complex statements should be guarded using the DebugLoggingEnabled property");
        }
        return new FunctionResponse();
    }
}