独立管理独立AngularJS指令之间的通信

This is more of an organizational approach to solving this issue rather than a direct solution. My question itself is that if I have two directives which are not dependent on each other and can both work independently to serve their purposes. But if one of the directives is present then the other one needs to execute once the other is ready. In this case then what would be the logical way to make sure that it works out that way without the need to hardcode any function calls or events?This is more of an organizational approach to s