public static TRes Handle <TEvent, TRes>(TEvent input, ILambdaContext context, Func <TRes> handlerFn)
{
if (Utils.CurrentConfig == null || Utils.CurrentConfig.IsEpsagonDisabled)
{
return(handlerFn());
}
var clientCodeExecuted = false;
var returnValue = default(TRes);
Exception exception = null;
try {
Utils.DebugLogIfEnabled("entered epsagon lambda handler");
// handle trigger event
using (var scope = GlobalTracer.Instance.BuildSpan("").StartActive(finishSpanOnDispose: true)) {
var trigger = TriggerFactory.CreateInstance(input.GetType(), input);
trigger.Handle(context, scope);
}
// handle invocation event
using (var scope = GlobalTracer.Instance.BuildSpan((typeof(TEvent).Name)).StartActive(finishSpanOnDispose: true))
using (var handler = new LambdaTriggerHandler <TEvent, TRes>(input, context, scope)) {
handler.HandleBefore();
try {
clientCodeExecuted = true;
returnValue = handlerFn();
} catch (Exception e) {
scope.Span.AddException(e);
exception = e;
}
handler.HandleAfter(returnValue);
}
var trace = EpsagonConverter.CreateTrace(JaegerTracer.GetSpans());
EpsagonTrace.SendTrace(trace);
JaegerTracer.Clear();
Utils.DebugLogIfEnabled("finishing epsagon lambda handler");
} catch (Exception ex) {
HandleInstrumentationError(ex);
} finally {
if (exception != null)
{
throw exception;
}
if (!clientCodeExecuted)
{
returnValue = handlerFn();
}
}
return(returnValue);
}
public static async Task Handle <TEvent>(TEvent input, ILambdaContext context, Func <Task> handlerFn)
{
if (Utils.CurrentConfig == null || Utils.CurrentConfig.IsEpsagonDisabled)
{
await handlerFn();
return;
}
var clientCodeExecuted = false;
Exception exception = null;
try {
if (Utils.CurrentConfig.IsEpsagonDisabled)
{
await handlerFn();
}
Utils.DebugLogIfEnabled("entered epsagon lambda handler");
Utils.DebugLogIfEnabled("handling trigger event");
using (var scope = GlobalTracer.Instance.BuildSpan("").StartActive(finishSpanOnDispose: true)) {
var trigger = TriggerFactory.CreateInstance(input.GetType(), input);
trigger.Handle(context, scope);
}
// handle invocation event
Utils.DebugLogIfEnabled("handling invocation event");
using (var scope = GlobalTracer.Instance.BuildSpan((typeof(TEvent).Name)).StartActive(finishSpanOnDispose: true))
using (var handler = new LambdaTriggerHandler <TEvent, string>(input, context, scope)) {
Utils.DebugLogIfEnabled("handling before execution");
handler.HandleBefore();
Utils.DebugLogIfEnabled("calling client handler");
try {
clientCodeExecuted = true;
await handlerFn();
} catch (Exception e) {
scope.Span.AddException(e);
exception = e;
}
Utils.DebugLogIfEnabled("handling after execution");
handler.HandleAfter("");
}
Utils.DebugLogIfEnabled("creating trace");
var trace = EpsagonConverter.CreateTrace(JaegerTracer.GetSpans());
EpsagonTrace.SendTrace(trace);
JaegerTracer.Clear();
Utils.DebugLogIfEnabled("finishing epsagon lambda handler");
} catch (Exception ex) {
HandleInstrumentationError(ex);
} finally {
if (exception != null)
{
throw exception;
}
if (!clientCodeExecuted)
{
await handlerFn();
}
}
}
