How to Remember the State in Eclipse e4

Question

在Eclipse 3.x中，通过检查ApplicationWorkbenchAdvisor类中的restoreState()方法，我们可以很容易地知道应用程序是第一次启动还是正在恢复状态，但是Eclipse 4.x中不提供此功能，所以任何人都可以帮助我我知道Eclipse 4中的Eclipse状态是否已恢复？

Answer 1

You could set a value in the 'persisted state' of the application and check that during start up.

The earliest the application object is available is the @ProcessAdditions step of the LifeCyle class.

@ProcessAdditions
void processAdditions(MApplication app)
{
  String value = app.getPersistedState().get("myKey");

  if (value == null)  // Starting with nothing to restore
   {
     app.getPersistedState().put("myKey", "set");

     ...
   }
  else
   {
     ... persisted state exists
   }

}