Re: Wicket, Ajax and JSON
Maybe you are trying to drive screw into a board with a hammer?
I recommend just creating servlet to serve up these json style responses and
then use the excellent json.org libraries(instead of hand constructing json
transform your data structures into json automatically). The only issue
you'll have here is authentication so if you need a unified auth system you
will need to get that up and running in your json responder (wicket would do
it automatically).
filter-mapping
filter-nameWebApplication/filter-name
url-pattern/*/url-pattern
/filter-mapping
servlet
descriptionThis is the JSON Gatewayn/description
display-nameJSON Gateway/display-name
servlet-nameJsonGateway/servlet-name
servlet-classyour.package.json.JsonGateway/servlet-class
/servlet
servlet-mapping
servlet-namegetSomeData/servlet-name
url-pattern/json/getSomeData/url-pattern
/servlet-mapping
John-
On Fri, Jul 31, 2009 at 6:34 AM, Serban Balamaci serban.balam...@asf.rowrote:
Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .
The javascript for the component requires an address from which it will
receive data in the form of a JSON response.
I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a Controller Page
a page that takes parameters such as the entity that is being retrieved and
also paging info, sort order, etc and returns the JSON response.
I do not like this aproach as, most obvious reason is that it would not be
obvious from the component what you need to do in order to get it to work.
I would much more preffer to having a callback method that returns the
json.
So I have created a
AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {
protected void respond(AjaxRequestTarget ajaxRequestTarget) {
ajaxRequestTarget.prependJavascript({page: 1, total: 239
});
}
and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.
Unfortunately the problem is the response when invoked is wrapped in a
ajax-responseevaluate encoding=wicket1
?xml version=1.0 encoding=UTF-8?
ajax-responseevaluate encoding=wicket1![CDATA[{page: 1,total:
239}]]/evaluate/ajax-response
So my question is how to get only the JSON part without the ?xml
version.,
ajax-response . and CDATA decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior?
Or any other ideea to go about the problem.
Thank you,
Serban
RE: Wicket, Ajax and JSON
Hello John.
This I would put in the same category as the Controller Page solution. And
well, that kind of separation will not make a nice reusable component. I
want in the end to get maybe even with something of a model behind it and
not have such a separation, although I guess the model of the component
would know to pass the parameters to the JSON servlet. And to get over the
problem of authentication and injection of other beans that can even be
coded as a Wicket Page.
Curently I'm looking in the direction of not extending
AbstractDefaultAjaxBehavior but looking more at the base classes in
AbstractDefaultAjaxBehavior and implement something like
public final void respond(final RequestCycle requestCycle)
{
final Application app = Application.get();
// Determine encoding
final String encoding =
app.getRequestCycleSettings().getResponseRequestEncoding();
// Set content type based on markup type for page
final WebResponse response =
(WebResponse)requestCycle.getResponse();
response.setCharacterEncoding(encoding);
response.setContentType(text/xml; charset= + encoding);
response.write(json data);
}
-Original Message-
From: John Armstrong [mailto:siber...@siberian.org]
Sent: 31 iulie 2009 17:33
To: users@wicket.apache.org
Subject: Re: Wicket, Ajax and JSON
Maybe you are trying to drive screw into a board with a hammer?
I recommend just creating servlet to serve up these json style responses and
then use the excellent json.org libraries(instead of hand constructing json
transform your data structures into json automatically). The only issue
you'll have here is authentication so if you need a unified auth system you
will need to get that up and running in your json responder (wicket would do
it automatically).
filter-mapping
filter-nameWebApplication/filter-name
url-pattern/*/url-pattern
/filter-mapping
servlet
descriptionThis is the JSON Gatewayn/description
display-nameJSON Gateway/display-name
servlet-nameJsonGateway/servlet-name
servlet-classyour.package.json.JsonGateway/servlet-class
/servlet
servlet-mapping
servlet-namegetSomeData/servlet-name
url-pattern/json/getSomeData/url-pattern
/servlet-mapping
John-
On Fri, Jul 31, 2009 at 6:34 AM, Serban Balamaci
serban.balam...@asf.rowrote:
Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .
The javascript for the component requires an address from which it will
receive data in the form of a JSON response.
I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a Controller Page
a page that takes parameters such as the entity that is being retrieved
and
also paging info, sort order, etc and returns the JSON response.
I do not like this aproach as, most obvious reason is that it would not be
obvious from the component what you need to do in order to get it to work.
I would much more preffer to having a callback method that returns the
json.
So I have created a
AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {
protected void respond(AjaxRequestTarget ajaxRequestTarget) {
ajaxRequestTarget.prependJavascript({page: 1, total:
239
});
}
and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.
Unfortunately the problem is the response when invoked is wrapped in a
ajax-responseevaluate encoding=wicket1
?xml version=1.0 encoding=UTF-8?
ajax-responseevaluate encoding=wicket1![CDATA[{page: 1,total:
239}]]/evaluate/ajax-response
So my question is how to get only the JSON part without the ?xml
version.,
ajax-response . and CDATA decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior?
Or any other ideea to go about the problem.
Thank you,
Serban
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Wicket, Ajax and JSON
Hi,
Instead of using AbstractDefaultAjaxBehavior you can use its superclass
AbstractAjaxBehavior as follows:
AbstractAjaxBehavior behaviour = new AbstractAjaxBehavior()
{
private static final long serialVersionUID = 1L;
@SuppressWarnings(unchecked)
public void onRequest()
{
//get parameters
final RequestCycle requestCycle = RequestCycle.get();
final PageParameters pageParameters = new
PageParameters(requestCycle.getRequest().getParameterMap());
//do something using nice json library to produce a string
of json
String json = ...
requestCycle.setRequestTarget(new
StringRequestTarget(application/json, utf-8, data));
}
};
add(behaviour);
I can't see anything wrong with the servlet example, but this has the
advantage of being in a Wicket component, so you can easily access your
Wicket session, and the user wont have to remember to map extra servlets.
I have also tried making a component out of flexigrid, but ran into issues
(which they may have fixed now), for example, I was getting rendering issues
in the grid when trying to resize the columns.
I then moved onto another jQuery grid called jqGrid
(http://www.trirand.com/blog/) which I felt had more features and was more
robust.
At jWeekend (http://www.jweekend.com) have almost completed the Wicket
mapping of this grid and we hope to release this in the future when we are
satisfied with our testing and API. This will be released as a plugin to
the wiQuery project (http://code.google.com/p/wiquery/), which basically
means it will depend on wiQuery.
Regards - Richard Wilkinson
Developer
jWeekend: OO Java Technologies - Development and Training
http://jWeekend.com
Serban Balamaci wrote:
Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .
The javascript for the component requires an address from which it will
receive data in the form of a JSON response.
I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a Controller Page
a page that takes parameters such as the entity that is being retrieved
and
also paging info, sort order, etc and returns the JSON response.
I do not like this aproach as, most obvious reason is that it would not be
obvious from the component what you need to do in order to get it to work.
I would much more preffer to having a callback method that returns the
json.
So I have created a
AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {
protected void respond(AjaxRequestTarget ajaxRequestTarget) {
ajaxRequestTarget.prependJavascript({page: 1, total:
239
});
}
and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.
Unfortunately the problem is the response when invoked is wrapped in a
ajax-responseevaluate encoding=wicket1
?xml version=1.0 encoding=UTF-8?
ajax-responseevaluate encoding=wicket1![CDATA[{page: 1,total:
239}]]/evaluate/ajax-response
So my question is how to get only the JSON part without the ?xml
version.,
ajax-response . and CDATA decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior?
Or any other ideea to go about the problem.
Thank you,
Serban
-
http://richard-wilkinson.co.uk My blog: http://richard-wilkinson.co.uk
--
View this message in context:
http://www.nabble.com/Wicket%2C-Ajax-and-JSON-tp24756591p24757846.html
Sent from the Wicket - User mailing list archive at Nabble.com.
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: Wicket, Ajax and JSON
That's cool.
I'm still surprised to see that whenever something remotely
ressembling stateless/REST comes up in the mailing list, the gut
reaction is: servlets. It might be simpler for a few usecases, but
normally you also want to take advantage of other Wicket features -
precisely the reason why Serban insists with the Ajax behaviour.
If it is feasible already, what I really would like is to have better
support for doing REST. Of course you don't want to drive screw into
a board with a hammer but for many cases simple stateless suffices,
where Jersey would be an overkill and servlets out of the picture.
Those usecases include sites where you want to expose some
functionality as stateless (including Ajax) and the rest are heavily
interactive pages (like an admin or wizards) where Wicket excels.
I just recall the interest there was when the creator of
http://www.fitcomplex.sk/ mentioned what he was doing with jQuery.
Just a general feeling I'm expressing here.
Thanks,
Francisco
2009/7/31 richardwilko richardjohnwilkin...@gmail.com:
Hi,
Instead of using AbstractDefaultAjaxBehavior you can use its superclass
AbstractAjaxBehavior as follows:
AbstractAjaxBehavior behaviour = new AbstractAjaxBehavior()
{
private static final long serialVersionUID = 1L;
�...@suppresswarnings(unchecked)
public void onRequest()
{
//get parameters
final RequestCycle requestCycle = RequestCycle.get();
final PageParameters pageParameters = new
PageParameters(requestCycle.getRequest().getParameterMap());
//do something using nice json library to produce a string
of json
String json = ...
requestCycle.setRequestTarget(new
StringRequestTarget(application/json, utf-8, data));
}
};
add(behaviour);
I can't see anything wrong with the servlet example, but this has the
advantage of being in a Wicket component, so you can easily access your
Wicket session, and the user wont have to remember to map extra servlets.
I have also tried making a component out of flexigrid, but ran into issues
(which they may have fixed now), for example, I was getting rendering issues
in the grid when trying to resize the columns.
I then moved onto another jQuery grid called jqGrid
(http://www.trirand.com/blog/) which I felt had more features and was more
robust.
At jWeekend (http://www.jweekend.com) have almost completed the Wicket
mapping of this grid and we hope to release this in the future when we are
satisfied with our testing and API. This will be released as a plugin to
the wiQuery project (http://code.google.com/p/wiquery/), which basically
means it will depend on wiQuery.
Regards - Richard Wilkinson
Developer
jWeekend: OO Java Technologies - Development and Training
http://jWeekend.com
Serban Balamaci wrote:
Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .
The javascript for the component requires an address from which it will
receive data in the form of a JSON response.
I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a Controller Page
a page that takes parameters such as the entity that is being retrieved
and
also paging info, sort order, etc and returns the JSON response.
I do not like this aproach as, most obvious reason is that it would not be
obvious from the component what you need to do in order to get it to work.
I would much more preffer to having a callback method that returns the
json.
So I have created a
AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {
protected void respond(AjaxRequestTarget ajaxRequestTarget) {
ajaxRequestTarget.prependJavascript({page: 1, total:
239
});
}
and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.
Unfortunately the problem is the response when invoked is wrapped in a
ajax-responseevaluate encoding=wicket1
?xml version=1.0 encoding=UTF-8?
ajax-responseevaluate encoding=wicket1![CDATA[{page: 1,total:
239}]]/evaluate/ajax-response
So my question is how to get only the JSON part without the ?xml
version.,
ajax-response . and CDATA decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior?
Or any other ideea to go about the problem.
Thank you,
Serban
-
http://richard-wilkinson.co.uk My blog: http://richard-wilkinson.co.uk
--
View this message in context:
http://www.nabble.com/Wicket%2C-Ajax-and-JSON-tp24756591p24757846.html
Sent from the Wicket - User mailing list archive at Nabble.com.
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands,
Re: Wicket, Ajax and JSON
Maybe someone can document a workable solution in the Wiki for future
generations?
Tx
J
On Fri, Jul 31, 2009 at 10:22 AM, francisco treacy
francisco.tre...@gmail.com wrote:
That's cool.
I'm still surprised to see that whenever something remotely
ressembling stateless/REST comes up in the mailing list, the gut
reaction is: servlets. It might be simpler for a few usecases, but
normally you also want to take advantage of other Wicket features -
precisely the reason why Serban insists with the Ajax behaviour.
If it is feasible already, what I really would like is to have better
support for doing REST. Of course you don't want to drive screw into
a board with a hammer but for many cases simple stateless suffices,
where Jersey would be an overkill and servlets out of the picture.
Those usecases include sites where you want to expose some
functionality as stateless (including Ajax) and the rest are heavily
interactive pages (like an admin or wizards) where Wicket excels.
I just recall the interest there was when the creator of
http://www.fitcomplex.sk/ mentioned what he was doing with jQuery.
Just a general feeling I'm expressing here.
Thanks,
Francisco
2009/7/31 richardwilko richardjohnwilkin...@gmail.com:
Hi,
Instead of using AbstractDefaultAjaxBehavior you can use its superclass
AbstractAjaxBehavior as follows:
AbstractAjaxBehavior behaviour = new AbstractAjaxBehavior()
{
private static final long serialVersionUID = 1L;
@SuppressWarnings(unchecked)
public void onRequest()
{
//get parameters
final RequestCycle requestCycle = RequestCycle.get();
final PageParameters pageParameters = new
PageParameters(requestCycle.getRequest().getParameterMap());
//do something using nice json library to produce a string
of json
String json = ...
requestCycle.setRequestTarget(new
StringRequestTarget(application/json, utf-8, data));
}
};
add(behaviour);
I can't see anything wrong with the servlet example, but this has the
advantage of being in a Wicket component, so you can easily access your
Wicket session, and the user wont have to remember to map extra servlets.
I have also tried making a component out of flexigrid, but ran into
issues
(which they may have fixed now), for example, I was getting rendering
issues
in the grid when trying to resize the columns.
I then moved onto another jQuery grid called jqGrid
(http://www.trirand.com/blog/) which I felt had more features and was
more
robust.
At jWeekend (http://www.jweekend.com) have almost completed the Wicket
mapping of this grid and we hope to release this in the future when we
are
satisfied with our testing and API. This will be released as a plugin to
the wiQuery project (http://code.google.com/p/wiquery/), which basically
means it will depend on wiQuery.
Regards - Richard Wilkinson
Developer
jWeekend: OO Java Technologies - Development and Training
http://jWeekend.com
Serban Balamaci wrote:
Hello. I'm trying to create a wicket component out of FlexiGrid
http://www.flexigrid.info/ .
The javascript for the component requires an address from which it will
receive data in the form of a JSON response.
I'm not sure what is the best way to go about it. Simple and most ugly
approach would be to have something of a Controller Page
a page that takes parameters such as the entity that is being retrieved
and
also paging info, sort order, etc and returns the JSON response.
I do not like this aproach as, most obvious reason is that it would not
be
obvious from the component what you need to do in order to get it to
work.
I would much more preffer to having a callback method that returns the
json.
So I have created a
AbstractDefaultAjaxBehavior clientConnectBehavior = new
AbstractDefaultAjaxBehavior() {
protected void respond(AjaxRequestTarget ajaxRequestTarget)
{
ajaxRequestTarget.prependJavascript({page: 1, total:
239
});
}
and used clientConnectBehavior.getCallbackUrl() as the url passed to the
flexigrid.
Unfortunately the problem is the response when invoked is wrapped in a
ajax-responseevaluate encoding=wicket1
?xml version=1.0 encoding=UTF-8?
ajax-responseevaluate encoding=wicket1![CDATA[{page: 1,total:
239}]]/evaluate/ajax-response
So my question is how to get only the JSON part without the ?xml
version.,
ajax-response . and CDATA decoration. Can it be bypassed? Shoul I
override something in AbstractDefaultAjaxBehavior?
Or any other ideea to go about the problem.
Thank you,
Serban
-
http://richard-wilkinson.co.uk My blog:
Re: Wicket, Ajax and JSON
Thanks guys, loved the AbstractAjaxBehavior solution, and by the way jqgrid seems to be more active and the way to go(thanks for pointing it Richard). Keeping fingers crossed for wiQuery and if they even bring the flexi or jqgrid to wicket it's gonna prove you can have awesome visual components in Wicket too. - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
