Hi,
do I need to have this "p" (String type) parameter in my action class ?
--
Thx, Milan
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 [
>>>>>> >> <s:form>
>>>>>> >> <s:url id="display_chart"
>>>>>> value="DrawChart_draw.action"
>>>>>> >> namespace="/user" />
>>>>>> >>
>>>>>> >> <s:submit value="Draw
>>>>>> chart" href="%{display_chart}"
>>>>>> >> theme="ajax"
>>>>>> targets="*chart_div*" />
>>>>>> >> <br />
>>>>>> >> </s:form>
>>>>>> >>
>>>>>> >> <h4>Your Running Chart</h4>
>>>>>> >> <div id="*chart_div*">
>>>>>> >> </div> <!-- End display chart
>>>>>> -->
>>>>>> >> </div>
>>>>>> >>
>>>>>> >> ]
>>>>>> >>
>>>>>> >>
>>>>>> >> display_chart.jsp [
>>>>>> >> <body>
>>>>>> >>
>>>>>> >> /MyApp/user/DrawChart_display.action
>>>>>> >> </body>
>>>>>> >>
>>>>>> >> ]
>>>>>> >>
>>>>>> >>
>>>>>> >> struts.xml[
>>>>>> >> <package name="user"
>>>>>> extends
>>>>>> >> ="struts-default,jfreechart-default">
>>>>>> >> <!-- Separate method to draw and
>>>>>> display due to Remote
>>>>>> >> DIV/Button tag contsraints.
>>>>>> >> -->
>>>>>> >> <action
>>>>>> name="DrawChart_input" method="input"
>>>>>> >> class=".xxx.DrawChart">
>>>>>> >> <result
>>>>>> name="input">form.jsp </result>
>>>>>> >> </action>
>>>>>> >>
>>>>>> >> <action
>>>>>> name="DrawChart_draw" method="draw"
>>>>>> >> class="xxx..DrawChart">
>>>>>> >> <result
>>>>>> name="success">/jsp/display_chart.jsp
>>>>>> >> </result>
>>>>>> >> </action>
>>>>>> >> <action
>>>>>> name="DrawChart_display"
>>>>>> method="display"
>>>>>> >> class="xxx.DrawChart">
>>>>>> >> <result
>>>>>> name="success" type="chart">
>>>>>> >> 400
>>>>>> >> 300
>>>>>> >> </result>
>>>>>> >> </action>
>>>>>> >>
>>>>>> >> </package>
>>>>>> >> ]
>>>>>> >>
>>>>>> >>
>>>>>> >> DrawChart.java [
>>>>>> >> JFreeChart chart;
>>>>>> >> public String draw() throws Exception {
>>>>>> >> //chart creation logic.
>>>>>> >> //generate chart object
>>>>>> >> chart = ....
>>>>>> >> session = ....
>>>>>> >> session.put("CHART",
>>>>>> chart);
>>>>>> >> return success;
>>>>>> >> }
>>>>>> >>
>>>>>> >> /**
>>>>>> >> * returns chart obejct from the session.
>>>>>> >> This methos is used by display_chart.jsp
>>>>>> >> */
>>>>>> >> public String display() throws Exception {
>>>>>> >> session = ...get session ...
>>>>>> >> this.chart = (JFreeChart)
>>>>>> session.get("CHART");
>>>>>> >> if(chart == null) {
>>>>>> >>
>>>>>> addActionError(getText("error.nochart"));
>>>>>> >> return ERROR;
>>>>>> >> }
>>>>>> >> return SUCCESS;
>>>>>> >> }
>>>>>> >>
>>>>>> >> // this method will get called if we specify
>>>>>> chart
>>>>>> >> public JFreeChart getChart() {
>>>>>> >> return chart;
>>>>>> >> }
>>>>>> >>
>>>>>> >> /**
>>>>>> >> * <p> input action
>>>>>> >> */
>>>>>> >> public String input() throws Exception {
>>>>>> >> return INPUT;
>>>>>> >> }
>>>>>> >>
>>>>>> >> ]
>>>>>
>>>>>
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>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
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