strangeness with MemoryUserDatabase

["Robert J. Carr" <rj...@apl.washington.edu>]

Yesterday I asked a question about using tomcat authorization with httpd
authentication.  Here's the subject: "httpd authentication with tomcat
authorization". I'm still awaiting a response, but I thought I'd come up
with a solution anyway.  I've got something working, but wanted to dig a
bit deeper.  Again, this is in Tomcat 6.0.41.

I overrode the UserDatabaseRealm to take advantage of its creation of the
MemoryUserDatabase and all I needed to do was override the hasRole().  When
asking it to print the database, I get a reasonable result:


MemoryUserDatabase[id=UserDatabase,pathname=conf/tomcat-users.xml,groupCount=0,roleCount=11,userCount=9]

And when asking it to give me users and roles with findUser() and
findRole() it works fine.

However, when I try to iterate over all the users and roles the iterator is
always empty.  This is true for the groups as well.  Looking at the code
from MemoryUserDatabase seems straight forward enough:

    public Iterator getUsers() {
        synchronized (users) {
            return (users.values().iterator());
        }
    }

But as I said, this iterator is always empty. I'm not sure how this is
possible given the findUser(), that works, is equally simple:

    public User findUser(String username) {
        synchronized (users) {
            return ((User) users.get(username));
        }
    }

And the iterators seem to be empty either when first loaded from the
UserDatabaseRealm in start() or when in the hasRole().

I'm not reporting a problem of my own, since I'm not using the iterators,
but just wanted to report the strangeness that I'm seeing.