• Fast dependency injection(DI) container in go (golang)
• like uber-go/dig library, but better than it :) .

This Future

• Split build and call, fast call speed in product.
• Support user custom provider.
• Support delay inject. (dynamic inject from call argument)
• Thread safely.

Example:

http_test.go
container_test.go
request_di_test.go

func TestHttpHandler(t *testing.T) {
	di := dig2.New()
	type test struct {
		A int
	}
	di.Provide(func() test {
		return test{A: 1}
	})

	diHandler := dig2_handler.NewHttpHandler(di, dig2_handler.HttpHandlerOpt{
		AfterRequest: dig2_handler.DefaultHttpJsonApiAfterRequest,
	})
	http.Handle("/test1", diHandler(func(resp http.ResponseWriter, a test, req *http.Request) {
		fmt.Fprintf(resp, "%v,%v", a.A, req.FormValue("id"))
	}))
	http.Handle("/test2", diHandler(func(a test) string {
		// auto response from DefaultHttpJsonApiAfterRequest
		return strconv.Itoa(a.A + 1)
	}))
	http.Handle("/test3", diHandler(func(a test) test {
		// auto response from DefaultHttpJsonApiAfterRequest
		return test{A: a.A + 2}
	}))
	srv := httptest.NewServer(nil)

	s1 := httpTestGet(t, srv.URL+"/test1?id=99")
	require.Equal(t, s1, "1,99")
	s2 := httpTestGet(t, srv.URL+"/test2")
	require.Equal(t, s2, "2")
	s3 := httpTestGet(t, srv.URL+"/test3")
	require.Equal(t, s3, `{"A":3}`)
}

Some TODO

• some uber.dig test function not cover.
• ptr auto cast

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