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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