woodie

# Specify the handlers to create in the root logger
# (all loggers are children of the root logger)
# The following creates two handlers 
handlers = java.util.logging.ConsoleHandler, java.util.logging.FileHandler

# Set the default logging level for the root logger
.level = ALL

# Set the default logging level for new ConsoleHandler instances
java.util.logging.ConsoleHandler.level = INFO

woodie

We bundle from MRI for JRuby¶ ↑

no such file to load –

/Users/me/Desktop/rails_app/.gems/bundler_gems/jruby/1.8/environment (LoadError)

but this file exists –

/Users/me/Desktop/rails_app/.gems/bundler_gems/ruby/1.8/environment.rb

The stub environment.rb now contains this…

require 'rbconfig'

woodie

def foo(a:int[])
  a.each {|x| x += 1;puts x; redo if x == 2}
end

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# Critical default settings:
disable_system_gems
disable_rubygems
bundle_path '.gems/bundler_gems'

# List gems to bundle here:
gem 'rails_dm_datastore'
gem 'rails', "2.3.5"
gem 'i18n'
gem 'tzinfo'

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# Critical default settings:
disable_system_gems
disable_rubygems
bundle_path ".gems/bundler_gems"

# List gems to bundle here:
gem "appengine-rack"
gem "appengine-apis"
gem 'hpricot',   '0.8.2'
gem 'mechanize', '0.8.5'

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# Critical default settings:
disable_system_gems
disable_rubygems
bundle_path ".gems/bundler_gems"

# List gems to bundle here:
gem "appengine-rack"
gem "appengine-apis"
gem "activesupport", "3.0.pre"
gem "builder"

woodie

~/projects/jruby ➔ jruby -J-Djruby.jit.threshold=0 -J-Djruby.jit.codeCache=`pwd`/codecache -e "load 'test/mri/sample/test.rb'"
assignment : ..................................................................................................................................................................................................................................................................................................................................................................condition : ..if/unless : ...case : .....while/until : ........exception : .......array : .......................................hash : ...........................iterator : .........................................................................................float : ................................................................................bignum : ...............................string & char : ..............................................................assignment : ..........call : ......proc : .........eval : ..

woodie

require "date"
puts "appengine gem versions: #{Time.now}"
cmd = "gem list | grep appengine"
#puts cmd
gems = `#{cmd}`.split("\n").collect{|v| v.strip }.sort

gems.each do |gem|
  if gem =~ /^(\S+) \((.+)\)$/
    name = $1
    versions = $2.split(",").collect{|v| v.strip }.sort

woodie

Working with JRuby CodeCache on App Engine¶ ↑

CodeCache is a way to dump bitecode when classes hit the JRuby JIT. Setting the jruby.jit.threshold low will generate more files, but may not be helpful. Without CodeCache, the default jruby.jit.threshold of 99 is best.

Getting Started¶ ↑

First, make sure you have a current version of 1.5.x

gist.github.com/423990

woodie

diff --git a/src/org/jruby/compiler/JITCompiler.java b/src/org/jruby/compiler/JITCompiler.java
index c1bc58a..3fb2faa 100644
--- a/src/org/jruby/compiler/JITCompiler.java
+++ b/src/org/jruby/compiler/JITCompiler.java
@@ -190,6 +190,7 @@ public class JITCompiler implements JITCompilerMBean {
         private String className;
         private String filename;
         private String methodName;
+        private String key;