I have been working on the following bean for several days and not
getting very far. I think I am missing something but my java knowledge
is limited.
Here are the relivent pieces of code...
package com.mysoftware.poorderItem;
import java.io.*;
import java.sql.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class poorderItemBean implements
HttpSessionBindingListener,Serializable {
private boolean hasError;
private boolean needsConfirm;
private String rawItem;
private String evalItem;
private String Desc1;
private String Desc2;
private String driver = "net.sourceforge.jtds.jdbc.Driver";
private String DBIPAddr = "";
private String url = "jdbc:jtds:sqlserver:";
private String user;
private String pass;
private Connection con;
private HttpSession session;
private ServletContext sc;
public poorderItemBean() {
initValues();
}
private void initValues() {
hasError = true;
needsConfirm = false;
rawItem = null;
evalItem = null;
Desc1 = null;
Desc2 = null;
lineid = -1;
}
private void initDBstuff() {
DBIPAddr = sc.getInitParameter("DatabaseIPAddr");
user = sc.getInitParameter("DatabaseUser");
pass = sc.getInitParameter("DatabasePassword");
url = url + DBIPAddr.trim();
}
public void valueBound(HttpSessionBindingEvent event) {
session = event.getSession();
sc = session.getServletContext();
initDBstuff();
}
public void valueUnbound(HttpSessionBindingEvent event) {
session = null;
sc = null;
}
public String getRawPartNumber() {
return rawItem;
}
public String getPartNumber() {
return evalItem;
}
public void setPartNumber (String pn) {
String tempPartNumber = null;
if (!pn.trim().equals(this.evalItem.trim())) {
// Lookup new description and price
try {
Class.forName(driver);
con = DriverManager.getConnection(url,user,pass);
CallableStatement cs = con.prepareCall("{call EvalCustPOLine
?,?}");
CallableStatement cs1 = con.prepareCall("{call HuntforCatpart
?}");
PreparedStatement ps1 = con.prepareStatement("Select in_Catpart
from dbo.Inventory where in_Catpart = ? and in_Delete=0");
PreparedStatement ps2 = con.prepareStatement("Select in_Catpart,
in_Desc, in_Desc2, in_Nonstock from dbo.Inventory where in_Catpart = ?
and in_Delete=0");
ResultSet rsInvent1;
ResultSet rsInvent2;
ResultSet rsEval;
ResultSet rsHunt;
ps1.setString(1,pn.trim());
rsInvent1 = ps1.executeQuery();
while (rsInvent1.next()) {
tempPartNumber = rsInvent1.getString("in_Catpart").trim();
}
rsInvent1.close();
ps1.close();
if (tempPartNumber==null) {
//Hunt for part number
this.hasError = true;
cs1.setString(1,pn.trim());
rsHunt = cs1.executeQuery();
while(rsHunt.next()) {
tempPartNumber = rsHunt.getString("Suggestion").trim();
if (rsHunt.getInt("Matches")==1) {
this.needsConfirm = true;
this.hasError = false;
} else {
this.needsConfirm = false;
this.hasError = true;
}
}
rsHunt.close();
cs1.close();
}
//Load Description and price
this.evalItem = null;
this.Desc1 = null;
this.Desc2 = null;
this.IsSpecialorder = false;
if (tempPartNumber!=null) {
ps2.setString(1,tempPartNumber);
rsInvent2 = ps2.executeQuery();
while (rsInvent2.next()) {
this.evalItem = rsInvent2.getString("in_Catpart").trim();
this.Desc1 = rsInvent2.getString("in_Desc").trim();
this.Desc2 = rsInvent2.getString("in_Desc2").trim();
this.IsSpecialorder = rsInvent2.getBoolean("in_NonStock");
}
rsInvent2.close();
ps2.close();
}
} catch (Exception e) {
sc.log("Exception caught (poorderItemBean) : "+e.getMessage());
}
}
}
When I call setPartNumber() I get an exception. It looks like it hasn't
assigned a session or servletcontext yet. I am trying to get the
database connection information from the web.xml file.
Any help/suggestions?
Thanks,
Tim
P.S. Sorry if this appears as a cross post. I posted in
comp.lang.java.beans a few days ago and there doesn't seem to be any
activity there.
Raymond DeCampo - 14 Jan 2006 18:38 GMT
> When I call setPartNumber() I get an exception.
From where? How? (E.g. a servlet, a JSP, an applet, an application,
etc.) What is the exact exception?
> It looks like it hasn't
>
[quoted text clipped - 9 lines]
> comp.lang.java.beans a few days ago and there doesn't seem to be any
> activity there.
This would be a multi-post in that case, not a cross-post. Under the
circumstances, a forgivable one.
HTH,
Ray

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This signature intentionally left blank.
mills@brewersmarine.com - 14 Jan 2006 22:06 GMT
>From a servlet... (more code)
public class ProcessPOXLS extends BaseAppServlet {
public void doProcessRequest (HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
ServletContext sc = getServletContext();
HttpSession session = request.getSession();
com.mysoftware.poorderItem.poorderItemBean ItemBean;
try {
List poList = (List)session.getAttribute("poList");
if (poList==null) {
poList = new ArrayList();
}
int quarter = (maxRows-1) / 4;
for (int i = 1; i <= (maxRows-1);i++) {
ItemBean = new com.mysoftware.poorderItem.poorderItemBean();
ItemBean.setLineID(i);
ItemBean.setHasError(false);
ItemBean.setPartNumber('5023');
poList.add(ItemBean);
}
session.setAttribute("poList",poList);
}
catch (Exception e) {
sc.log("Exception caught (ProcessXLS) : "+e.getMessage());
}
}
All I get is the following in my tomcat log file :
2006-01-11 17:10:13 StandardContext[]Exception caught (ProcessXLS) :
null
I have put in sc.log statements to help trace how far this gets and it
fails immediately after ItemBean.setPartNumber
Raymond DeCampo - 15 Jan 2006 19:19 GMT
>>From a servlet... (more code)
>
[quoted text clipped - 44 lines]
> 2006-01-11 17:10:13 StandardContext[]Exception caught (ProcessXLS) :
> null
Log the stack strace of your exception as well via
sc.log("Exception caught (ProcessXLS) : " + e.getMessage(), e);
This should tell you exactly what line is failing (assuming you have
compiled with debug information).
Ray

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This signature intentionally left blank.
mills@brewersmarine.com - 16 Jan 2006 14:47 GMT
Thank you for the correction to my sc.log code. I can now see exactly
where this line is failing.
It is failing on the following line...
sc.log('Some tracing information here');
I believe that the ServletContext object sc is NULL. It gets
initialized when valueBound(HttpSessionBindingEvent event) is called. I
don't think that this event is getting called/triggered. I am not sure
if I have implemented HttpSessionBindingListener properly.
Here is the code for the valueBound event...
private HttpSession session;
private ServletContext sc;
public void valueBound(HttpSessionBindingEvent event) {
session = event.getSession();
sc = session.getServletContext();
initDBstuff();
}