I have my ConnectionPool object stored into my ServletContext; however, I
get an ClassCastException:
pool = (ConnectionPool)getServletContext().getAttribute("pool");
Then, I tried writing ConnectionPool object to use an instance of itself
instead of the object itself; however, now I get an exception in my
StartupServlet loading my ConnectionPool instance
(ConnectionPool object)
...
protected static ConnectionPool instance;
private ConnectionPool ( )
throws SQLException, ClassNotFoundException {
// Load the specified driver class
Class.forName( ... );
connections = new Hashtable ();
// Put our pool of Connections in the Hashtable
// The FALSE value indicates they are unused.
for (int i = 0; i < initialConnections; i++) {
connections.put (DriverManager.getConnection(dbURL, user,
password), Boolean.FALSE);
}
}
public static ConnectionPool getinstance() {
if (instance == null){
instance = ConnectionPool.getinstance();
}
return instance;
}
...
(StartupServlet init )
...
public void init (ServletConfig config) throws ServletException {
super.init(config);
context = config.getServletContext();
try {
// Load the JDBC driver and register it
pool = ConnectionPool.getinstance ();
}
catch(Exception e) {
throw new UnavailableException (this, "Could not create
connection pool");
}
}
...
So now I'm getting:
[03/Jul/2000:15:02:59] failure ( 190): Internal error: unexpected exception
thrown from the servlet init function (servlet class=StartupServlet):
java.lang.StackOverflowError, Stack: java.lang.StackOverflowError
at java.io.PrintStream.println(PrintStream.java:551)
at ConnectionPool.getinstance(ConnectionPool.java:36)
at ConnectionPool.getinstance(ConnectionPool.java:37)
.... (about 60+ more of the above line..)
at ConnectionPool.getinstance(ConnectionPool.java:37)
at ConnectionPoo[03/Jul/2000:15:02:59] warning ( 190): Internal
error: Failed to load servlet (servlet=StartupServlet)
Any ideas or suggestion would be greatly appreciated.
-------------------------------------------------------------------------
James C. Bragg
Senior Software Consultant
Computer Associates International Inc
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