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use reverse looping instead of calling recursion #5

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use reverse looping instead of calling recursion #5

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11 changes: 5 additions & 6 deletions middleware.go
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Original file line number Diff line number Diff line change
Expand Up @@ -14,14 +14,13 @@ type LambdaFunc func(context.Context, interface{}) (interface{}, error)
// take in one LambdaFunc and wrap it within another LambdaFunc
type Middleware func(next LambdaFunc) LambdaFunc

// buildChain builds the middlware chain recursively, functions are first class
// buildChain builds the middlware chain, functions are first class
func buildChain(f LambdaFunc, m ...Middleware) LambdaFunc {
// if our chain is done, use the original LambdaFunc
if len(m) == 0 {
return f
// build middleware chain in reverse order, if no middlewares provided returns f
for i := len(m) - 1; i >= 0; i-- {
f = m[i](f)
}
// otherwise nest the LambdaFuncs
return m[0](buildChain(f, m[1:]...))
return f
}

// newMiddlewareWrapper takes the middleware chain, and converts it into
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