JRuby

Peculiar errors with failed java_import in different scenarios

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Fixed
  • Affects Version/s: JRuby 1.6RC1
  • Fix Version/s: JRuby 1.6
  • Component/s: None
  • Labels:
    None
  • Number of attachments :
    0

Description

Strangely different errors.

Works as expected (NameError because YumYum is not in quotes):

~ ➔ jruby -rjava -e 'import "java.util.ArrayList" do; YumYum; end'
org/jruby/RubyModule.java:2530:in `const_missing': uninitialized constant YumYum (NameError)
	from -e:1:in `__file__'
	from /Users/headius/projects/jruby/lib/ruby/site_ruby/shared/builtin/javasupport/core_ext/object.rb:79:in `java_import'
	from -e:1:in `(root)'

Now with Minecraft's jar, also ok:

~ ➔ jruby -rjava -r'~/Library/Application Support/minecraft/bin/minecraft.jar' -e 'import "er" do; YumYum; end'
org/jruby/RubyModule.java:2530:in `const_missing': uninitialized constant YumYum (NameError)
	from -e:1:in `__file__'
	from /Users/headius/projects/jruby/lib/ruby/site_ruby/shared/builtin/javasupport/core_ext/object.rb:79:in `java_import'
	from -e:1:in `(root)'

Require 'yaml' first:

~ ➔ jruby -ryaml -rjava -r'~/Library/Application Support/minecraft/bin/minecraft.jar' -e 'import "er" do; YumYum; end'
org/jruby/javasupport/JavaClass.java:1052:in `for_name': security exception loading Java class er (NameError)
	from org/jruby/javasupport/JavaUtilities.java:34:in `get_proxy_class'
	from /Users/headius/projects/jruby/lib/ruby/site_ruby/shared/builtin/javasupport/core_ext/object.rb:46:in `java_import'
	from -e:1:in `(root)'

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Charles Oliver Nutter added a comment -

The problem here was that the Minecraft jar is signed, and the yecht.jar file we use for YAML is not. However they both have classes at the root of the package structure. When YAML loads first, that package is set to have no security policy. Minecraft's classes then cause an error when trying to load, since the security policy must differ.

We can't fix that, other than by eliminating yecht.jar (which we'd like to do, but it's outside the scope of this bug). I have at least modified JRuby to raise the original SecurityException message in a ruby SecurityError.

commit c8d316738ea0ac7aff1393598bf3a6089151687a
Author: Charles Oliver Nutter <headius@headius.com>
Date: Thu Jan 13 13:46:24 2011 -0600

Fix JRUBY-5351: Peculiar errors with failed java_import in different scenarios

  • Do not mask the original SecurityError's message behind a generic NameError. Raise a Ruby SecurityError with the same message.
Show
Charles Oliver Nutter added a comment - The problem here was that the Minecraft jar is signed, and the yecht.jar file we use for YAML is not. However they both have classes at the root of the package structure. When YAML loads first, that package is set to have no security policy. Minecraft's classes then cause an error when trying to load, since the security policy must differ. We can't fix that, other than by eliminating yecht.jar (which we'd like to do, but it's outside the scope of this bug). I have at least modified JRuby to raise the original SecurityException message in a ruby SecurityError. commit c8d316738ea0ac7aff1393598bf3a6089151687a Author: Charles Oliver Nutter <headius@headius.com> Date: Thu Jan 13 13:46:24 2011 -0600 Fix JRUBY-5351 : Peculiar errors with failed java_import in different scenarios Do not mask the original SecurityError's message behind a generic NameError. Raise a Ruby SecurityError with the same message.
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Charles Oliver Nutter added a comment -

FWIW, we did eventually roll yecht.jar's contents directly into JRuby.jar, so I suspect this may work fine now. It does for me:

~/projects/jruby &#10132; jruby -ryaml -rjava -r'~/Library/Application Support/minecraft/bin/minecraft.jar' -e 'import "er" do; "YumYum"; end; p YumYum.instance_methods.sort'
["==", "===", "=~", "__id__", "__jcreate!", "__jsend!", "__send__", "a", "a?", "b", "b?", "ba", "c", "c?", "class", "clone", "com", "d", "display", "dup", "e", "e?", "enum_for", "eql?", "equal?", "equals", "equals?", "extend", "f", "finalize", "freeze", "frozen?", "g", "getClass", "get_class", "h", "handle_different_imports", "hash", "hashCode", "hash_code", "i", "i?", "id", "include_class", "initialize", "inspect", "instance_eval", "instance_exec", "instance_of?", "instance_variable_defined?", "instance_variable_get", "instance_variable_set", "instance_variables", "is_a?", "java", "java_annotation", "java_class", "java_implements", "java_kind_of?", "java_method", "java_name", "java_object", "java_object=", "java_package", "java_require", "java_send", "java_signature", "javax", "kind_of?", "marshal_dump", "marshal_load", "method", "methods", "nil?", "notify", "notifyAll", "notify_all", "object_id", "org", "private_methods", "protected_methods", "public_methods", "respond_to?", "send", "singleton_methods", "synchronized", "taguri", "taguri=", "taint", "tainted?", "tap", "toString", "to_a", "to_enum", "to_java", "to_java_object", "to_s", "to_string", "to_yaml", "to_yaml_properties", "to_yaml_style", "type", "untaint", "wait"]

I'd love to see an installable JRuby library that would import and re-alias all the key classes and methods in Minecraft.

Show
Charles Oliver Nutter added a comment - FWIW, we did eventually roll yecht.jar's contents directly into JRuby.jar, so I suspect this may work fine now. It does for me: ~/projects/jruby &#10132; jruby -ryaml -rjava -r'~/Library/Application Support/minecraft/bin/minecraft.jar' -e 'import "er" do; "YumYum"; end; p YumYum.instance_methods.sort' ["==", "===", "=~", "__id__", "__jcreate!", "__jsend!", "__send__", "a", "a?", "b", "b?", "ba", "c", "c?", "class", "clone", "com", "d", "display", "dup", "e", "e?", "enum_for", "eql?", "equal?", "equals", "equals?", "extend", "f", "finalize", "freeze", "frozen?", "g", "getClass", "get_class", "h", "handle_different_imports", "hash", "hashCode", "hash_code", "i", "i?", "id", "include_class", "initialize", "inspect", "instance_eval", "instance_exec", "instance_of?", "instance_variable_defined?", "instance_variable_get", "instance_variable_set", "instance_variables", "is_a?", "java", "java_annotation", "java_class", "java_implements", "java_kind_of?", "java_method", "java_name", "java_object", "java_object=", "java_package", "java_require", "java_send", "java_signature", "javax", "kind_of?", "marshal_dump", "marshal_load", "method", "methods", "nil?", "notify", "notifyAll", "notify_all", "object_id", "org", "private_methods", "protected_methods", "public_methods", "respond_to?", "send", "singleton_methods", "synchronized", "taguri", "taguri=", "taint", "tainted?", "tap", "toString", "to_a", "to_enum", "to_java", "to_java_object", "to_s", "to_string", "to_yaml", "to_yaml_properties", "to_yaml_style", "type", "untaint", "wait"] I'd love to see an installable JRuby library that would import and re-alias all the key classes and methods in Minecraft.

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  • Assignee:
    Charles Oliver Nutter
    Reporter:
    Charles Oliver Nutter
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