Getting resources

Ruby JRuby
1

I’m not sure if I’m missing something obvious here. I’m attempting to
adapt code of the following form:

Application.class.getResource(“config/application.conf”);

or

getClass().getResource("/config/application.conf");

but am having problems. More specifically, I can’t seem to find the
getResource() method from JRuby. I’ve tried:

Application.class.getResource()
Application.getClass.getResource()
Application.java_class.getResource()

and none of these seem to find getResource(). This is on JRuby trunk.
What am I missing?

Thanks.

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2

I recently ran into this same issue, but I was able to get what I
needed using something like:

jc = Java::JavaClass.for_name(“classname”)
jc.java_class.java_method(“getResource”).invoke(jc)

I was also a bit confused why none of the things you tried below
worked, but I never got around to posting.

Related to this, is there a reason why JRuby doesn’t set the current
Java thread’s contextClassLoader to the JRubyClassLoader? This caused
all kinds of problems for me because I was trying to use the Spring’s
ClassPathXmlApplicationContext, but it seems that internally, Spring
keeps trying to load stuff with the Thread’s contextClassLoader so
resources that I had added to the $CLASSPATH were not being found. I
wound up with something like:

load_from_class = Java::JavaClass.for_name
(“org.springframework.context.support.ClassPathXmlApplicationContext”)
class_loader = load_from_class.java_class.java_method
(“getClassLoader”).invoke(load_from_class)

JThread.currentThread().setContextClassLoader(class_loader)

@@app_context = ClassPathXmlApplicationContext.new(paths.to_java
(:string), ClassPathXmlApplicationContext.java_class)

I’m still not sure if that’s going to come back and bite me eventually.

-lenny

On Oct 8, 2007, at 4:38 PM, Nolan D. wrote:

getResource() method from JRuby. I’ve tried:

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3

On Oct 8, 2007, at 3:59 PM, Lenny M. wrote:

jc = Java::JavaClass.for_name(“classname”)
jc.java_class.java_method(“getResource”).invoke(jc)

Ewww. Much as I’m looking forward to writing future apps in Ruby,
I’m not looking forward to having to do that. :confused: I use the
getClass().getResource() pattern fairly often.

Is this a bug in the Java integration? Has it already been filed, or
should I? Not sure why self.class.getResource shouldn’t work for Ruby
subclasses of Java classes. Maybe self.java_class.getResource() at
worst.

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4

I’ve seen the same behavior; get_resource always returns nil when I
could
run the same thing in Java and have it work. I thought it might be a
bug,
but never got around to posting it here.

My intermediate solution was to make a pure Java class that did just the
getResource part for me. But using something like
self.java_class.get_resource does look better than what I did. I’m going
to
switch to that for now.