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Go-dyno is a lightweight and flexible library for Go, inspired by Java's dynamic proxy mechanism. It enables dynamic creation of proxy implementations for interfaces at runtime, allowing developers to intercept and customize method calls programmatically. This makes it a powerful tool for building dynamic behaviors and enhancing flexibility in Go applications.
Latest documentation is availablehere
Install latest version of the library using go get command:
go get -u github.com/ovechkin-dm/go-dyno
This is an example of proxy that prints method name before any method invocation of the original instance.
package mainimport ("fmt""reflect""github.com/ovechkin-dm/go-dyno/pkg/dyno")typeGreeterinterface {Greet()stringSayHello(namestring)string}typeSimpleGreeterstruct {}func (g*SimpleGreeter)Greet()string {return"Hello!"}func (g*SimpleGreeter)SayHello(namestring)string {returnfmt.Sprintf("Hello, %s!",name)}typeProxyHandler[Tany]struct {ImplT}func (p*ProxyHandler[T])Handle(m reflect.Method,values []reflect.Value) []reflect.Value {fmt.Println("Method called:",m.Name)returnreflect.ValueOf(p.Impl).MethodByName(m.Name).Call(values)}funcmain() {greeter:=&SimpleGreeter{}proxyHandler:=&ProxyHandler[Greeter]{Impl:greeter}dynamicGreeter,err:= dyno.Dynamic[Greeter](proxyHandler.Handle)iferr!=nil {fmt.Println("Error creating dynamic greeter:",err)return}fmt.Println(dynamicGreeter.Greet())fmt.Println(dynamicGreeter.SayHello("World"))}
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Dynamic proxy for golang
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