create EventLink without onPassivate

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create EventLink without onPassivate

Jens Breitenstein
Hi all!

I use ComponentResources to create my EventLinks. As the page context
(in this example "id") is added to the link onPassivate gets called.
This results in a link like

     /mypage:mycomponent?t:ac=id

Each component context "cc1", "cc2" passed to the createEventLink method
results in a link like

/mypage:mycomponent/cc1/cc2?t:ac=id

My goal is to replace the exisiting ac, means the activation context of
the page which is used in onPassivate to create "arbitrary" eventlinks
like this

/webui/mypage:mycomponent?t:ac=ec1/ec2

without accessing the page members prior link creation. Of course it's
possible to convert the Link to URI / String and perform some string
manipulations, but I wonder if there is a "real Tapestry" solution?


Thanks in advance

Jens


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Re: create EventLink without onPassivate

Thiago H de Paula Figueiredo
Hello!

Why do you want to have EventLinks with an activation context different
from the current one? This doesn't look good at first look, to be honest.

On Thu, Aug 16, 2018 at 10:35 AM Jens Breitenstein <[hidden email]>
wrote:

> Hi all!
>
> I use ComponentResources to create my EventLinks. As the page context
> (in this example "id") is added to the link onPassivate gets called.
> This results in a link like
>
>      /mypage:mycomponent?t:ac=id
>
> Each component context "cc1", "cc2" passed to the createEventLink method
> results in a link like
>
> /mypage:mycomponent/cc1/cc2?t:ac=id
>
> My goal is to replace the exisiting ac, means the activation context of
> the page which is used in onPassivate to create "arbitrary" eventlinks
> like this
>
> /webui/mypage:mycomponent?t:ac=ec1/ec2
>
> without accessing the page members prior link creation. Of course it's
> possible to convert the Link to URI / String and perform some string
> manipulations, but I wonder if there is a "real Tapestry" solution?
>
>
> Thanks in advance
>
> Jens
>
>
>

--
Thiago
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Re: create EventLink without onPassivate

Jens Breitenstein
Hi Thiago!

Well, I have different entry points to show a different amount of the
same type of data. Either I can enter the page
1) using a PK (which results in a list of child entities) or
2) a combination of two PKs (a direct parent / child relation) or
3) an intervall (which directly results in child entities for the
intervall having multiple roots) or
4) a search string
5) a.s.o.

This is all reflected in readable URLs.
The data and all componts used on my page are (more or less) the same
regardless of the entry path. But to show some details I always use a
combination of PKs which I do not have in my activation context for
method 1, 3, 4, 5, but I know it from the hibernate objects anyway.

So consider I have a loop to build up my JSON Objects including an
eventlink: I have to reset my page state prior eventlink creation which
on the other hand destroys my initial onActivate context. So a
workaround is something like this:

     push activation context
         reset context in loop and create eventlinks
     pop activation context

or simply a method which allows me to create the eventlink bypassing
onPassivate and accepting a "new context object array". I know that this
might introduce a different class of errors because the logic of link
creation is now spread across different places, but I believe its still
easier to deal with compared to modifying a "complex" page state in a loop.

The other way round: I can create PageLinks with arbitrary page
activation context objects, why not EventLinks?


Jens

Sorry, I am a non native english speaker as you may have recognized
already, hopefully you understand what I mean.


Am 21.08.18 um 23:56 schrieb Thiago H. de Paula Figueiredo:

> Hello!
>
> Why do you want to have EventLinks with an activation context different
> from the current one? This doesn't look good at first look, to be honest.
>
> On Thu, Aug 16, 2018 at 10:35 AM Jens Breitenstein <[hidden email]>
> wrote:
>
>> Hi all!
>>
>> I use ComponentResources to create my EventLinks. As the page context
>> (in this example "id") is added to the link onPassivate gets called.
>> This results in a link like
>>
>>       /mypage:mycomponent?t:ac=id
>>
>> Each component context "cc1", "cc2" passed to the createEventLink method
>> results in a link like
>>
>> /mypage:mycomponent/cc1/cc2?t:ac=id
>>
>> My goal is to replace the exisiting ac, means the activation context of
>> the page which is used in onPassivate to create "arbitrary" eventlinks
>> like this
>>
>> /webui/mypage:mycomponent?t:ac=ec1/ec2
>>
>> without accessing the page members prior link creation. Of course it's
>> possible to convert the Link to URI / String and perform some string
>> manipulations, but I wonder if there is a "real Tapestry" solution?
>>
>>
>> Thanks in advance
>>
>> Jens
>>
>>
>>


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Re: create EventLink without onPassivate

Thiago H de Paula Figueiredo
On Wed, Aug 22, 2018 at 8:45 AM Jens Breitenstein <[hidden email]>
wrote:

> Hi Thiago!
>

Hello!


> or simply a method which allows me to create the eventlink bypassing
> onPassivate and accepting a "new context object array". I know that this
> might introduce a different class of errors because the logic of link
> creation is now spread across different places, but I believe its still
> easier to deal with compared to modifying a "complex" page state in a loop.
>

I'd just pass everything you need in the EventLink context and ignore the
page activation context in the logic of the corresponding event handler
page. In other words, if you set variables a and b in onActivate(), ignore
them in the event link handler method.

Or, better yet, create a separate page for serving the JSON objects,
returning them in onActivate() according to the page activation context
received. You'd get URLs using PageRenderLinkSource. I believe you're
mixing two different things in the same page.

The other way round: I can create PageLinks with arbitrary page
> activation context objects, why not EventLinks?
>

Because PageLink is very different from EventLink. Pages have their own
activation context, events are part of a page. In a page, everything is
supposed to work according to its page activation context, event links
included. So what you're trying to do, the way you're doing, is going
against the rationale behind the framework, and, in Tapestry and in any
other framework out there, this usually doesn't go well.


> Sorry, I am a non native english speaker as you may have recognized
> already, hopefully you understand what I mean.
>

No problem! It was clear. I'm not an English speaker either. :)


>
>
> Am 21.08.18 um 23:56 schrieb Thiago H. de Paula Figueiredo:
> > Hello!
> >
> > Why do you want to have EventLinks with an activation context different
> > from the current one? This doesn't look good at first look, to be honest.
> >
> > On Thu, Aug 16, 2018 at 10:35 AM Jens Breitenstein <[hidden email]
> >
> > wrote:
> >
> >> Hi all!
> >>
> >> I use ComponentResources to create my EventLinks. As the page context
> >> (in this example "id") is added to the link onPassivate gets called.
> >> This results in a link like
> >>
> >>       /mypage:mycomponent?t:ac=id
> >>
> >> Each component context "cc1", "cc2" passed to the createEventLink method
> >> results in a link like
> >>
> >> /mypage:mycomponent/cc1/cc2?t:ac=id
> >>
> >> My goal is to replace the exisiting ac, means the activation context of
> >> the page which is used in onPassivate to create "arbitrary" eventlinks
> >> like this
> >>
> >> /webui/mypage:mycomponent?t:ac=ec1/ec2
> >>
> >> without accessing the page members prior link creation. Of course it's
> >> possible to convert the Link to URI / String and perform some string
> >> manipulations, but I wonder if there is a "real Tapestry" solution?
> >>
> >>
> >> Thanks in advance
> >>
> >> Jens
> >>
> >>
> >>
>
>
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> To unsubscribe, e-mail: [hidden email]
> For additional commands, e-mail: [hidden email]
>
>

--
Thiago