使用警告程序创建jRuby 1.9 Sinatra应用程序失败

Question

我有一个简单的Sinatra应用程序，我将托管在tomcat作为一个战争。当我对其进行警告并在tomcat中运行它时，一切都运行正常。如果我在warble配置中设置了Ruby1.9标志

config.webxml.jruby.compat.version = "1.9“

然后war就不会运行，我会在tomcat日志中看到以下错误

INFO: An exception happened during JRuby-Rack startup
no such file to load -- mysinatraapp
--- System
jruby 1.6.5.1 (ruby-1.9.2-p136) (2011-12-27 1bf37c2) (Java HotSpot(TM) 64-Bit Server VM 1.6.0_29) [darwin-x86_64-java]
Time: 2012-01-16 10:06:32 -0600
Server: Apache Tomcat/7.0.23
jruby.home: file:/apache-tomcat-7.0.23/webapps/ROOT/WEB-INF/lib/jruby-stdlib-1.6.5.1.jar!/META-INF/jruby.home

--- Context Init Parameters:
jruby.compat.version = 1.9
jruby.max.runtimes = 1
jruby.min.runtimes = 1
public.root = /
rack.env = production

--- Backtrace
LoadError: no such file to load -- mysinatraapp
        require at org/jruby/RubyKernel.java:1047
        require at file:/apache-tomcat-7.0.23/webapps/ROOT/WEB-INF/lib/jruby-stdlib-1.6.5.1.jar!/META-INF/jruby.home/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36
         (root) at /apache-tomcat-7.0.23/webapps/ROOT/WEB-INF/config.ru:2
  instance_eval at org/jruby/RubyBasicObject.java:1720
     initialize at file:/apache-tomcat-7.0.23/webapps/ROOT/WEB-INF/lib/jruby-rack-1.1.3.jar!/vendor/rack-1.3.6/rack/builder.rb:51
         (root) at /apache-tomcat-7.0.23/webapps/ROOT/WEB-INF/config.ru:1

mysinatraapp.rb文件在war中，所以我不明白为什么它找不到它。这个应用程序在jruby中从命令行运行时运行得很好，所以我不认为这是一个与我的代码和1.9兼容的问题。即使只是从web.xml中删除这些行

<context-param>
<param-name>jruby.compat.version</param-name>
<param-value>1.9</param-value>
</context-param>

将让应用程序正常启动。

我的jar的版本是jruby-core-1.6.5.1.jar jruby-rack 1.1.3.jar jruby-stdlib-1.6.5.1.jar

Answer 1

我认为这可以通过1.8和1.9之间负载路径行为的细微变化来解释(MRI也是如此，而不仅仅是JRuby)。见证者：

$ jruby -v -rpp -e 'pp $LOAD_PATH'
jruby 1.7.0.dev (ruby-1.8.7-p357) (2012-01-12 0e83d96) (Java HotSpot(TM) Client VM 1.6.0_29) [darwin-i386-java]
["/Users/nicksieger/Projects/ruby/jruby/lib/ruby/site_ruby/1.8",
 "/Users/nicksieger/Projects/ruby/jruby/lib/ruby/shared",
 "/Users/nicksieger/Projects/ruby/jruby/lib/ruby/1.8",
 "."]

$ jruby -v --1.9 -rpp -e 'pp $LOAD_PATH'
jruby 1.7.0.dev (ruby-1.9.3-p6) (2012-01-12 0e83d96) (Java HotSpot(TM) Client VM 1.6.0_29) [darwin-i386-java]
["/Users/nicksieger/Projects/ruby/jruby/lib/ruby/site_ruby/1.9",
 "/Users/nicksieger/Projects/ruby/jruby/lib/ruby/shared",
 "/Users/nicksieger/Projects/ruby/jruby/lib/ruby/1.9"]

因此，您可能必须显式地将'.'或$servlet_context.getRealPath("/WEB-INF")添加到config.ru内的加载路径中。