Instrumenting multiple methods within same class with ByteBuddy

[diegolovison]

My question is the same as https://stackoverflow.com/questions/49189495/instrumenting-multiple-methods-within-same-class-with-bytebuddy

But I can't understand why it is not working
Here is my code

         new AgentBuilder.Default()
               .disableClassFormatChanges()
               .with(AgentBuilder.RedefinitionStrategy.RETRANSFORMATION)
               .type(ElementMatchers.isSubTypeOf(Class.forName(className)))
               .transform((builder, type, classLoader, module, protectionDomain) -> {
                  for (int i = 0; i < methodNameData.length; i++) {
                     String innerMethodName = methodNameData[i].trim();
                     String[] innerArguments = argumentsData[i].trim().split(",");
                     Class<?>[] argumentTypes = new Class<?>[innerArguments.length];
                     for (int j = 0; j < argumentTypes.length; j++) {
                        try {
                           argumentTypes[j] = Class.forName(innerArguments[j].trim());
                        } catch (ClassNotFoundException e) {
                           throw new RuntimeException(e);
                        }
                     }
                     builder.visit(Advice.to(MethodInterceptor.class).on(named(innerMethodName).and(takesArguments(argumentTypes))));
                  }
                  return builder;
               }).installOn(ByteBuddyAgent.install());

I would like to intercept multiple methods using the same Interceptor

[raphw]

You need to assign the builder which is immutable:

builder = builder.visit(...);

On a side note, you should reuse Advice.to(MethodInterceptor.class) as a shared instance.

[diegolovison]

Thanks. It worked