Also, look if identical files are generated
based on 2 different context:
abc.MyClass is not the same as xyx.MyClass.
If 2 class loaders
load from identical class files - JVM verifier
should throw the exception
before a second object is created. If this
doesn't happen - this is a
serious bug.
Also it is not possible to synchronize on the class
- only on the method
and a variable that is an object
----- Original Message -----
Sent: Tuesday, June 12, 2001 3:35
PM
Subject: RE: static,synchronized and
classloaders(was:Java Question)
Now is this true for when I have multiple contexts mapped to
the same docbase? I have seen on this list that Tomcat loads the
classes(in web-inf/classes) independently for each context and passing
MyObject class instance between contexts is not the same 'MyObject' class in
the second context even though it is the same code. Since it is not the same
class I would assume that I would have two instances of a static method/field.
And if it is synchronized on a static member(or the class itself) it would
only be synchonized for this context.
I'm really not sure what I would have if the class is static.
Thoughts?
Charlie
-----Original Message-----
From: Pae
Choi [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, June 12, 2001 2:42 PM
To: [EMAIL PROTECTED]
Subject: Re:
Java Question
When you access the 'synchronized' static method, it locks its
class.
so this will ensure the thread-safe access.
Otherwise, the result is
unknown.
Pae
> I have looked all over and can't find the answer to this
simple question.
> If you use a static method, do
you have to synchronize it in case other
> people
may access it at the same time. For example, I have a static
Utility
> class to do date calculations. The
method Utility.getMonth(String date)
> takes in a
full date string, parses it, and returns just the month value.
> If 5 different people all using the website attempt to
use
> Utility.getMonth(String date) at the same
time for different dates, will it
> return the
right results? If not, do I have to synchronize it or something
> in case multiple users attempt to access it?
>
> I know this is not really
related to tomcat, but since I am using tomcat,
>
and everyone else using tomcat is also a java developer, I figured this
is
> the best place I can ask.
>
> Thanks for any help!!!
>
> Brandon
>
