Hi all..
I'm using jsp & tomcat4.
The application collects user data.
I have a bean that contains all relevant data.
I am using serializtion to make the data persistant.
In order to restore the state of the bean I use:
<% URL resourceUrl =
application.getResource("/resource/SerializedBean.ser"); %>
// returns a valid url: jndi:/localhost/resource/MemberBean.ser
<jsp:useBean id="registrationBean" scope="application"
type="Package.class" beanName="Package.SerializedBean" >
<%
// the saved version is restored if there is no instance of this bean.
boolean bool = registrationBean.restoreState(registrationBean,
resourceUrl);
out.print("restored state: " + bool); //for debugging purposes..
%>
</jsp:useBean>
When saving the state with:
registrationBean.saveState(resourceUrl);
I get the following exception report:
Starting service Tomcat-Netbeans
Apache Tomcat/4.0.4
restoring state : jndi:/localhost/resource/MemberBean.ser
saving state to : jndi:/localhost/resource/MemberBean.ser
can do output: true */ SEE METHOD CALL BELOW /*
java.net.UnknownServiceException: protocol doesn't support output
at java.net.URLConnection.getOutputStream(URLConnection.java:679)
etc...
the code of the save state method is below:
public synchronized void saveState(URL url){
this.url = url;
try {
URLConnection uConn = url.openConnection();
uConn.setDoOutput(true);
if (debug)
{ System.out.println("can do output: " + uConn.getDoOutput()); }
OutputStream out = uConn.getOutputStream();
ObjectOutputStream s = new ObjectOutputStream(out);
s.writeObject(this);
s.flush();
s.close();
uConn.setDoOutput(false);
}
catch(FileNotFoundException fnfex){ fnfex.printStackTrace(); }
catch(IOException ioe){ ioe.printStackTrace(); }
}
Can anybody shed some light on this problem?
What other means are availiable to make beans persistant within a Servlet
Container?
Any suggestions are greatly appreciated.
Thank you
CARL WOERMANN
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