Remove one attribute of all online sessions

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Apache

JSP

Hi all,

I want to remove one attribute of all online sessions. I have cached a content of one short textfile to session. But the problem occur when i update the textfile, it continue use old content so that is reason which i want to remove the attribute of all online session.

Any one meet this problem? Please help me...

The include my code in a jsp as following:

result =(String) session.getAttribute("TVMS");
if(result == "" || result == null){
try{
System.out.println("RUNNING READ FILE CODE");
    BufferedReader reader = new BufferedReader(new FileReader(application.getRealPath("/")+"/TVMS.txt"));
    StringBuilder sb = new StringBuilder();
    String line;
    while((line = reader.readLine())!= null){
         result += line + "^";
    }
    session.setAttribute("TVMS", result.substring(0, result.length()-1));
}catch (Exception e) {
    e.printStackTrace();
}

And in javascript I declare a list:

var tvmslist = "<%=result%>".split('^');

function runText(){
    if("<%=userid%>" == "testhcm05"){

        var cur = new Date();
        if(tvmslist.length>0){
           alert("At this time " + cur +" Run");         

        }
        setTimeout("runText()", 60000);
    }
}

With above code, if I modify the TVMS.txt it still using old content (be stored in session variable). So I want to remove the attribute of all online session when I update the text file.