Is it Safe for a Class in Server package to access a method in Client package in GWT?

Question

Ok, I am uisng GWTP, it got Client, Server & Shared package.

I have a Util class in client.

my.client.Util.java{
  public static String method1();
  //more methods here
}

In server i have

my.server.GetDataActionHandler{
    ///Should I do like this
    String s=my.client.Util.method1();
}

Is it safe to do that or I should put Util into shared package, like this

my.shared.Util.java{
  public static String method1();
  //more methods here
}

What is the different if we put a Util in shared package? is it safer or any other good reasons?

Answer 1

client is as safe as shared, these are just names and conventions.

By placing your class in client though, you lose the indication that you're using it also on the server side, where client-specific code won't run.

By placing it in shared, you're signaling to yourself that you should make sure the code your put in the class can effectively be used in both the client and the server.