Re: [OT] Re: Struts 2 And JFreeChart
--- On Fri, 8/22/08, Milan Milanovic <[EMAIL PROTECTED]> wrote: > But if I don't have "p" property in my action > class, I got warning in log ParamsPrepareParams setting String... > interceptor and so on? ... So put a "p" parameter in your action. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Re: Struts 2 And JFreeChart
But if I don't have "p" property in my action class, I got warning in log
ParamsPrepareParams setting String... interceptor and so on ?
--
Milan
newton.dave wrote:
>
>> do I need to have this "p" (String type)
>> parameter in my action class ?
>
> No, it's there to create a unique URL, so it won't be cached.
>
> Dave
>
>> dynamicd wrote:
>> >
>> >
>> > its some parameter name (the name does not matter) and
>> RANDOM is set in
>> > the controller (Action)
>> > or to make it easy
>> >
>> > img
>> src="/Dashboard/DisplayChart.action?p=<%=request.hashCode()%>"
>> /
>> >
>> > instead of passing DisplayChart.action each time.
>> > it is passed in as a different url everytime and so it
>> will display the
>> > new image other wise if the url is the same then you
>> will get displayed
>> > the cached image.
>> >
>> >
>> >
>> > Milan Milanovic wrote:
>> >>
>> >> I don't understand this solution, what is
>> "p" parameter, and whait is
>> >> "RANDOM" ?
>> >>
>> >>
>> >> --
>> >> Regards, Milan
>> >>
>> >>
>> >> dynamicd wrote:
>> >>>
>> >>>
>> >>> got it to work.. could not stop the caching so
>> added a param to the src
>> >>>
>> >>> img
>> >>>
>> src="/Dashboard/DisplayChart.action?p=<%=request.getParameter("RANDOM")%>"
>> >>> /
>> >>>
>> >>>
>> >>>
>> >>> dynamicd wrote:
>>
>> I have tried
>> <%
>>
>> response.setHeader("Cache-Control",
>> "no-cache"); //HTTP 1.1
>> response.setHeader("Pragma",
>> "no-cache"); //HTTP 1.0
>>
>> response.setDateHeader("Expires", 0); //prevents
>> caching at the
>> proxy server
>>
>> %>
>>
>> as well..
>>
>>
>>
>> newton.dave wrote:
>> >
>> > --- On Wed, 8/6/08, dynamicd
>> <[EMAIL PROTECTED]> wrote:
>> >> Also tried implementing the
>> SessionAware. However the same thing.
>> >
>> > Why?
>> >
>> > Did you try setting the headers for
>> not caching?
>> >
>> > Dave
>> >
>> >> dynamicd wrote:
>> >> >
>> >> > This is cool.. I tried it
>> out. However once the
>> >> > chart_display.jsp is called
>> the first time through the
>> >> image tag. it does
>> >> > not call the
>> DisplayChart.action again to refresh the
>> >> image with a new one
>> >> > when clicked on the
>> DrawChart.action. (I added the
>> >> println statement in
>> >> > the display method to find
>> out that the div is not
>> >> refreshing) I have to
>> >> > log out and log in
>> (invalidate session) to get the new
>> >> chart. I am missing
>> >> > something
>> >> >
>> >> >
>> >> >
>> >> > public String display()
>> throws Exception {
>> >> >
>> System.out.println("I AM IN THE DISPLAY
>> >> NOW ");
>> >> > Map attributes =
>> >>
>> ActionContext.getContext().getSession();
>> >> > this.chart =
>> (JFreeChart)
>> >> attributes.get("CHART");
>> >> >
>> >> > if(chart == null) {
>> >> > return
>> Constants.FORWARD_INVALIDACTION;
>> >> > }
>> >> > return
>> Constants.FORWARD_SUCCESS;
>> >> > }
>> >> >
>> >> >
>> >> > private void
>> setChart(JFreeChart chart){
>> >> > Map attributes =
>> >>
>> ActionContext.getContext().getSession();
>> >> >
>> attributes.put("CHART", null);
>> >> > this.chart = chart;
>> >> >
>> attributes.put("CHART", this.chart);
>> >> > }
>> >> >
>> >> > public JFreeChart getChart()
>> {
>> >> > return chart;
>> >> > }
>> >> >
>> >> >
>> >> >
>> >> > Leena Borle wrote:
>> >> >>
>> >> >> Hello,
>> >> >> See if this helps you.
>> >> >> I have a form with
>> remote DIV which displays
>> >> chart after user clicks on
>> >> >> submit.
>> >> >> Trick here is to generate
>> chart object, store it
>> >> in session and display
>> >> >> it
>> >> >> in separate JSP. Remove
>> the form part if you
>> >> want to display just the
>> >> >> dynamic-DIV using Chart
>> image.
>> >> >>
>> >> >> Form.jsp [
>> >> >>
>> >> >> > id="display_chart"
>> >>
>> value="DrawChart_draw.action"
>> >> >>
>> namespace="/user" />
>> >> >>
>> >> >> > value="Draw
>> >> chart"
>> href="%{display_chart}"
>> >> >> theme="ajax"
>> >> targets="*chart_div*"
>> />
>> >> >>
>> >> >>
>> >> >>
>> >> >> Your
>> Running Chart
>> >> >> > id="*chart_div*">
>> >> >>
>>
>> >> >>
>> >> >>
>> >> >> ]
>> >> >>
>> >> >>
>> >> >> display_chart.jsp [
>> >> >>
>> >> >>
>> >> >>
>> /MyApp/user/DrawChart_display.action
>> >> >>
>> >> >>
>>
[OT] Re: Struts 2 And JFreeChart
> do I need to have this "p" (String type)
> parameter in my action class ?
No, it's there to create a unique URL, so it won't be cached.
Dave
> dynamicd wrote:
> >
> >
> > its some parameter name (the name does not matter) and
> RANDOM is set in
> > the controller (Action)
> > or to make it easy
> >
> > img
> src="/Dashboard/DisplayChart.action?p=<%=request.hashCode()%>"
> /
> >
> > instead of passing DisplayChart.action each time.
> > it is passed in as a different url everytime and so it
> will display the
> > new image other wise if the url is the same then you
> will get displayed
> > the cached image.
> >
> >
> >
> > Milan Milanovic wrote:
> >>
> >> I don't understand this solution, what is
> "p" parameter, and whait is
> >> "RANDOM" ?
> >>
> >>
> >> --
> >> Regards, Milan
> >>
> >>
> >> dynamicd wrote:
> >>>
> >>>
> >>> got it to work.. could not stop the caching so
> added a param to the src
> >>>
> >>> img
> >>>
> src="/Dashboard/DisplayChart.action?p=<%=request.getParameter("RANDOM")%>"
> >>> /
> >>>
> >>>
> >>>
> >>> dynamicd wrote:
>
> I have tried
> <%
>
> response.setHeader("Cache-Control",
> "no-cache"); //HTTP 1.1
> response.setHeader("Pragma",
> "no-cache"); //HTTP 1.0
>
> response.setDateHeader("Expires", 0); //prevents
> caching at the
> proxy server
>
> %>
>
> as well..
>
>
>
> newton.dave wrote:
> >
> > --- On Wed, 8/6/08, dynamicd
> <[EMAIL PROTECTED]> wrote:
> >> Also tried implementing the
> SessionAware. However the same thing.
> >
> > Why?
> >
> > Did you try setting the headers for
> not caching?
> >
> > Dave
> >
> >> dynamicd wrote:
> >> >
> >> > This is cool.. I tried it
> out. However once the
> >> > chart_display.jsp is called
> the first time through the
> >> image tag. it does
> >> > not call the
> DisplayChart.action again to refresh the
> >> image with a new one
> >> > when clicked on the
> DrawChart.action. (I added the
> >> println statement in
> >> > the display method to find
> out that the div is not
> >> refreshing) I have to
> >> > log out and log in
> (invalidate session) to get the new
> >> chart. I am missing
> >> > something
> >> >
> >> >
> >> >
> >> >public String display()
> throws Exception {
> >> >
> System.out.println("I AM IN THE DISPLAY
> >> NOW ");
> >> > Map attributes =
> >>
> ActionContext.getContext().getSession();
> >> > this.chart =
> (JFreeChart)
> >> attributes.get("CHART");
> >> >
> >> > if(chart == null) {
> >> > return
> Constants.FORWARD_INVALIDACTION;
> >> > }
> >> > return
> Constants.FORWARD_SUCCESS;
> >> > }
> >> >
> >> >
> >> > private void
> setChart(JFreeChart chart){
> >> > Map attributes =
> >>
> ActionContext.getContext().getSession();
> >> >
> attributes.put("CHART", null);
> >> > this.chart = chart;
> >> >
> attributes.put("CHART", this.chart);
> >> > }
> >> >
> >> > public JFreeChart getChart()
> {
> >> > return chart;
> >> > }
> >> >
> >> >
> >> >
> >> > Leena Borle wrote:
> >> >>
> >> >> Hello,
> >> >> See if this helps you.
> >> >> I have a form with
> remote DIV which displays
> >> chart after user clicks on
> >> >> submit.
> >> >> Trick here is to generate
> chart object, store it
> >> in session and display
> >> >> it
> >> >> in separate JSP. Remove
> the form part if you
> >> want to display just the
> >> >> dynamic-DIV using Chart
> image.
> >> >>
> >> >> Form.jsp [
> >> >>
> >> >> id="display_chart"
> >>
> value="DrawChart_draw.action"
> >> >>
> namespace="/user" />
> >> >>
> >> >> value="Draw
> >> chart"
> href="%{display_chart}"
> >> >> theme="ajax"
> >> targets="*chart_div*"
> />
> >> >>
> >> >>
> >> >>
> >> >> Your
> Running Chart
> >> >> id="*chart_div*">
> >> >>
>
> >> >>
> >> >>
> >> >> ]
> >> >>
> >> >>
> >> >> display_chart.jsp [
> >> >>
> >> >>
> >> >>
> /MyApp/user/DrawChart_display.action
> >> >>
> >> >>
> >> >> ]
> >> >>
> >> >>
> >> >> struts.xml[
> >> >> name="user"
> >> extends
> >> >>
> ="struts-default,jfreechart-default">
> >> >>
> >> >> >> name="DrawChart_input"
> method="input"
> >> >>
> class=".xxx.DrawChart">
> >> >>
> >> name="input">f
RE: [OT] Re: Struts 2 And JFreeChart
which version Jfreechart are you implementing? Thanks, Martin __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. > Date: Thu, 21 Aug 2008 08:24:41 -0700 > From: [EMAIL PROTECTED] > Subject: [OT] Re: Struts 2 And JFreeChart > To: user@struts.apache.org > > --- On Thu, 8/21/08, Milan Milanovic wrote: > > I don't understand this solution, what is "p" parameter, and > > whait is "RANDOM"? > > This is a common technique to throw off caching mechanisms. > > The "p" parameter is a dummy parameter that gets a random value so that when > the submission is made, since the URL is changing due to the random > parameter, it won't be cached. > > Dave > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > _ Talk to your Yahoo! Friends via Windows Live Messenger. Find out how. http://www.windowslive.com/explore/messenger?ocid=TXT_TAGLM_WL_messenger_yahoo_082008
[OT] Re: Struts 2 And JFreeChart
--- On Thu, 8/21/08, Milan Milanovic wrote: > I don't understand this solution, what is "p" parameter, and > whait is "RANDOM"? This is a common technique to throw off caching mechanisms. The "p" parameter is a dummy parameter that gets a random value so that when the submission is made, since the URL is changing due to the random parameter, it won't be cached. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
