Remove NewLambda.swift and merge into Lambda.swift

Author: aryan-25

Sources/AWSLambdaRuntimeCore/Lambda.swift

@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Dispatch
 import Logging
 import NIOCore
 import NIOPosix
@@ -28,7 +29,39 @@ import ucrt
 #error("Unsupported platform")
 #endif
 
-enum Lambda {}
+enum Lambda {
+    package static func runLoop<RuntimeClient: LambdaRuntimeClientProtocol, Handler>(
+        runtimeClient: RuntimeClient,
+        handler: Handler,
+        logger: Logger
+    ) async throws where Handler: StreamingLambdaHandler {
+        var handler = handler
+
+        while !Task.isCancelled {
+            let (invocation, writer) = try await runtimeClient.nextInvocation()
+
+            do {
+                try await handler.handle(
+                    invocation.event,
+                    responseWriter: writer,
+                    context: NewLambdaContext(
+                        requestID: invocation.metadata.requestID,
+                        traceID: invocation.metadata.traceID,
+                        invokedFunctionARN: invocation.metadata.invokedFunctionARN,
+                        deadline: DispatchWallTime(millisSinceEpoch: invocation.metadata.deadlineInMillisSinceEpoch),
+                        logger: logger
+                    )
+                )
+            } catch {
+                try await writer.reportError(error)
+                continue
+            }
+        }
+    }
+
+    /// The default EventLoop the Lambda is scheduled on.
+    package static var defaultEventLoop: any EventLoop = NIOSingletons.posixEventLoopGroup.next()
+}
 
 // MARK: - Public API