On 6/21/11 12:25, ext2 wrote:
Thanks Richard S. Hall.
The framework class must be loaded by a class loader by definition
What's "definition" really means?
All classes are loaded by a class loader.
There is no standard way to define the framework class loader or its
parent. I don't think it would be possible to do this. However, it is
possible to define the parent class loader for bundles
(org.osgi.framework.bundle.parent or something property). This value is
only important when it comes to boot delegation, which generally isn't
used since it isn't very modular.
Is there any resource, I could find the exact property name? It seems this
is what I want: passing the host application's class loader to Felix, and
use it as system bundle's parent class loader.
The OSGi spec or check the Felix framework usage document...
The only reason why it is typically necessary to set the framework's
parent class loader is if you want to export packages from the system
bundle that are available on a specific class loader.
-> richard
-----Richard -----
Sender: Richard S. Hall [mailto:[email protected]]
Date: 2011/6/21 17:16
Receiver: [email protected]
Subject: Re: How to specify a custom class loader as embedded felix's
parent class
loader?
On 6/21/11 10:55, ext2 wrote:
Hi:
I am trying to embedded a felix framework in a application.
But the application will create a custom class loader, as make the
launched
felix to use the class loader as its parent class loader.
1) Could anyone help me to explain how Felix framework know which
class loader is it's parent class loader? the caller's class loader,
thread
context class loader or something else?
The framework class must be loaded by a class loader by definition. This
is the class loader that the framework will delegate to when it comes to
exposing "system" packages.
2) Is the way of choosing classloader used by felix same as equinox?
Does OSGI specification defined this?
There is no standard way to define the framework class loader or its
parent. I don't think it would be possible to do this. However, it is
possible to define the parent class loader for bundles
(org.osgi.framework.bundle.parent or something property). This value is
only important when it comes to boot delegation, which generally isn't
used since it isn't very modular.
-> richard
Thanks any suggestion
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