thx to all 3 of you! my very little example is now working (is there a place
to upload examples? it is nice to understand activities and places without
MVP)
placeController.getWhere() is the essence that made it clear for me. thats
the place the comparison uses with the place given to goTo,
Oh yeah small typo in my MainActivityMapper example. It has to be:
if(place instanceof XYZPlace) {
this.lastActivity = new XYZActivity(place);
return this.lastActivity;
} else if() {.} .
So its just implemented as a field that stores the activity. Nothing fancy
;-)
-- J.
thx that's realy nice - on first sight much better than
filtering/caching/overriding equal just to get the same as before.
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Thomas/Jens.
... and the CachingActivityMapper will then return the same activity
instance as previously ...
how to achieve that? i am able to create caching/filtered mapper but Filter
returns a place and all my mappers are returning new activities? How to
get / hold the old activity without
Are you use gin?
2011/6/24 tanteanni tantea...@hotmail.com
Thomas/Jens.
... and the CachingActivityMapper will then return the same activity
instance as previously ...
how to achieve that? i am able to create caching/filtered mapper but Filter
returns a place and all my mappers are
no
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The common pattern is ActivityManager → FilteredActivityMapper →
CachingActivityMapper → MyActivityMapper.
The FilteredActivityMapper's Filter transforms places to common cases that
can be compared with .equals(). In a Spring Roo app (at least of the kind
that came with the first version of
i didn't understand much thomas - sorry.
in meantime i wrote a little sandbox app to boil my problem down to a
minimum amount of code. My Problem is either i didn't understand anything or
CachingActivityMapper is a misleading term because where is the cache and
the cached activity. All i got
FilteredActivityMapper and CachingActivityMapper are the one from
gwt-user.jar, you only have to write a FilteredActivityMapper.Filter to
transform places, and an ActivityMapper which will provide the activities
(the one I called MyActivityMapper in my previous message).
Mauro replied a few
ok thats clear enough but there is my problem: providing an activity mapper
that returns a cached activity. how does such an getActivity -method looks
like (my only idea is to return an activity saved in some global field). but
i can't believe that CachingActivityMapper could provide a cached
On Friday, June 24, 2011 3:52:08 PM UTC+2, tanteanni wrote:
ok thats clear enough but there is my problem: providing an activity mapper
that returns a cached activity. how does such an getActivity -method looks
like (my only idea is to return an activity saved in some global field). but
thx thomas for your never ending endurance, i guess i came a little closer
after reading the source.
Sorry for that: But what is the value of lastPlace and lastActivity after
construction time?
And i miss the connection with Mauro's current code: If His CachingMApper
returns new
On Jun 24, 4:44 pm, tanteanni tantea...@hotmail.com wrote:
thx thomas for your never ending endurance, i guess i came a little closer
after reading the source.
Sorry for that: But what is the value of lastPlace and lastActivity after
construction time?
both null, of course..
And i miss
Its pretty easy. If you have looked at the source code of
CachingActivityMapper you see that it only calls place.equals(lastPlace) to
check if it has to return the previous activity or has to create a new one.
After construction of CachingActivityMapper both lastPlace and lastActivity
are null
Ok a Custom CachingActivityMapper was easy to implement and works but
there is still a case I am not happy with. If a user bookmarks
EmployeePlace(1,123) and 123 gets deleted the activity would redirect to
EmployeePlace(1, null) to keep the URL in sync (activity can not preselect
the deleted
Because you activity lasts longer than a place, it should listen to
PlaceChangeEvent (as if it were a singleton, except that it can be garbage
collected and will be recreated if you go to another activity in the mean
time), or the ActivityMapper should update it with the new place.
But
In that case I do not wanna cache things on client side. The app should be
smart enough that it doesn't try to reload the list each time a list item is
selected.
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Instead of changing the equality behavior of your place, you should instead
put your list activity mapper behind a FilteredActivityMapper and
CachingActivityMapper: the FilteredActivityMapper will convert an
EmployeePlace(empyer, employee) into, say, an EmployeePlace(employer, null),
and the
Thanks I will try that. Haven't thought of a FilteredActivityMapper. I
already tried a CachingActivityMapper on its own and because of the equality
stuff it doesn't work.
I have just went through some examples but the layoutmvp example posted in
this group also has an activity that starts over
It must have been in an earlier version. It's still in the bikeshed's
Scaffold app (thus probably in any app generated by Spring Roo btw)
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Hm I have tried it now and at least the activity does not get restarted. But
now if I bookmark my selected employee and access it later it can not be
reselected because the activity filter always sets the employee id to null.
The filter can not distinguish if the app is running and the user
Oh, so you have a single activity handling both the master and details?
In that case, then I'd probably implement the caching by hand in the
ActivityMapper (or in your own proxy activity mapper, inspired by
CachingActivityMapper but doing the comparison using a more sofisticated
approach than
Yeah its a migration to activities and for simplicity I have only defined a
single display area. Thats somehow the work area of the app.
The reason is that I have a custom widget (layout panel) that can do quite a
lot of things. So for each place I have that custom widget that effectively
Hi,
I just integrating activities and got stuck when it comes to list
selections. Hopefully someone with more practically experience can help me.
The application has one activity mapper that holds providers (GIN) of
activity proxies (code splitting) and creates new, clean activity instances
I think you can use a singleton in client side to manage
getEmployesOf(employer). You can cache the last query.
2011/6/15 Jens jens.nehlme...@gmail.com
Hi,
I just integrating activities and got stuck when it comes to list
selections. Hopefully someone with more practically experience can
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