OK, thanks.
ADC
-Original Message-
From: Frode E. Moe [mailto:[EMAIL PROTECTED]
Sent: 08 January 2004 09:57
To: Tomcat Users List
Subject: Re: Static ints being cached
On Thu, Jan 08, 2004 at 09:53:14 -, Allistair Crossley wrote:
Hi All,
I have an interface containing public final static ints. My servlets reference these
ints when making database inserts. Yesterday I reordered the values of the ints and
noticed that old values were still being placed into the database. I guess this was
somehow a caching problem. I deleted the .class from Tomcat to ensure a recompile
would place a new .class and restarted Tomcat, but old values still went in the
database!
- If I output the static ints from a JSP the new values come out.
- If I output the static ints from a class the old values come out.
- If I force the class using the interface to recompile, then the class starts using
the new values
It seems that somehow references are being stored by Tomcat somewhere since a
restart does not work but I don't know much about this. I would like to trust that
when I change values that Tomcat is able to pick these up, at the very least on a
restart!! I don't want to go through recompiling my whole app.
I am using Ant in a multi-developer environment to compile and it compiles only
classes that have changed. I cannot recompile the whole app everytime I change
constant values.
Help and understanding appreciated ...
The values of static final ints are copied into classes referring to
those as an optimization by the java compiler. So if you have class A
with some public static final ints in, and a class B referencing these
values, you will need to recompile class B if you change class A. Or you
need to make them non-final, so that java will actually look at the
current values in class A every time.
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