Re: attempting to understand PlaceTokenizer

Have a look there: http://tbroyer.posterous.com/gwt-21-places-part-ii

On Thursday, March 22, 2012 6:04:52 PM UTC+1, Thad wrote:

I am trying to understand Places, PlaceTokenizer, and how and when to parse the token. I read about them, look at examples, watch there execution, and still I think I'm missing something. (The examples I follow seem not to fit me--they seem either trivial or too complex to follow.)

I have a Place, MyPlace. It may get a null token, or it may get a token with one or more items--state, id, etc. Examples would be "LIST" or "SHOW_ID;1234". I read from Thomas that "parsing should be done in a PlaceTokenizer" (https://groups.google.com/d/​msg/google-web-toolkit/M5jCI-_​95mQ/JJcClisInRoJ). However if when I do my parsing in MyPlace.Tokenizer.getToken(), the MyPlace that is passed to MyActivity contains the previous values for state and id. My trace looks like

instantiate MyPlace(LIST)

AppActivityMapper.getActivity(​): com.foo.bar.client.place.​MyPlace@be4139

instantiate MyActivity, place: com.foo.bar.client.place.​MyPlace@be4139

starting MyActivity

MyView presenter set

It seems that the instantiation method for MyPlace must parse the token or calls to place.getState() and place.getId() will return values no yet set.

I can see MyPlace.Tokenizer.getToken() being called--though I'm not sure from where--but place.getState() does not return an updated value unless in start() wait with Scheduler.get().​scheduleDeferred() and test the value in execute().

I never see MyPlace.Tokenizer.getPlace() called. What is it used for? *WHEN* is it used (never from what I see).

Currently I'm parsing the token in MyPlace's instantiation method, but it doesn't feel right.

Can anyone clarify this for me?

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