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Java 版的 Ruby 解释器 JRuby 1.7.14 发布

2017年12月08日  | 移动技术网IT编程  | 我要评论

jruby 1.7.14 发布 ，此版本现已提供下载：

jruby 1.7 主要是为了兼容 ruby 1.9.3 版本，改进记录如下：

解决了 30 个 issues

修复了 jar 文件源潜在的内存泄漏问题

因为在 rails 应用启动比较慢，所以默认禁用 invokedynamic

load/require 内部重构和简化

解决了一些兼容性问题

1.7.14 修复的 bug：

#1923 - string#start_with? returns false when using an empty string
#1905 - tempfile and deleteonexit
#1899 - can't call static method on java 8 interface
#1898 - fix the memory leak and actually close the resources.
#1889 - npe from org.jruby.java.proxies.arrayjavaproxy.to_a
#1888 - native memory leak when reading files from inside a .jar
#1859 - jmx tries to double-bind a port when using bundle exec
#1858 - jruby with java 8 4 to 10 times slower than java 7
#1852 - jrubyclassloader seems to have a problem with file urls pointing to jar ...
#1850 - embedded jars do not get loaded
#1846 - fix $load_features paths for 1.8
#1818 - fix arrayjavaproxy#to_a failure on arrays containing null
#1813 - can not load resources from jar anymore with jar uri
#1809 - apply minor enebo's comments
#1808 - fix bigdecimal#round behavior with nan and infinity
#1805 - zlib crc improvements
#1803 - fix minor bug in `setnativeenabled`, and expose it in scriptingcontainer
#1802 - fix encoding::converter#inspect output
#1799 - mvn -pall fails at the documentation step
#1790 - make time#to_r consistent with mri
#1777 - serversocket#accept_nonblock returns the server's port, not the client's
#1772 - avoid sub-classing threadlocal since it will leak in envs such as .wars
#1765 - added a java_field method for use in the jrubyc command.
#1762 - enhanced the java_class compiler so it can handle multiple constructors
#1750 - refactor loadservice to make use of resources
#1729 - no valid struct layout for ethon::curl::slist
#1676 - empty hash optimization
#1580 - io.select raises cancelledkeyexception on shutdown
#1520 - date comparison as java objects
#1435 - bouncy-castle-java jars missing when warbling with jruby 1.7.10

jruby是面向ruby、基于java虚拟机(jvm)的一种解释程序，它结合了ruby语言的简易性和功能强大的jvm的执行机制，包括与 java库 全面集成。rails彻底加快及简化了web应用的开发，不过它让人觉得不够成熟，特别是在高端企业级功能方面。另一方面，java平台及其虚拟机、库和 应用服务器的速度、稳定性和功能方面却一直在提升，现在已被公认为是开发高端服务器应用的领先平台。不过如果java平台不与ruby等新兴语言联系在一 起，就有可能落后于流行趋势。

示例代码：

require "java"
include_class "java.util.treeset"
include_class "com.example.callme"
include_class "com.example.ispeaker"
puts "hello from ruby"
set = treeset.new
set.add "foo"
set.add "bar"
set.add "baz"
set.each { |v| puts "value: #{v}" }
cm = callme.new
cm.hello
$globalcm.hello
class calljava
include ispeaker
def initialize
 super
 @count = 0
end
def say(msg)
 puts "ruby saying #{msg}"
end
def addone(from)
#  m.synchronize {
  @count += 1
  puts "now got #@count from #{from}"
#  }
end
end

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