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« Return to Thread: classpath, JRuby, and Tomcat
Re: classpath, JRuby, and Tomcat
by Lenny Marks
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Tomcat has its own set of class loaders so java.class.path doesn't
really apply fully.
http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html
If you are trying to load classes/resources in WEB-INF/lib via one of
the classloaders other than the WebApp class loader(e.g from a class
in a jar not in WEB-INF/lib), I think you will have problems.
-lenny
On Mar 4, 2008, at 5:13 PM, John Woodward wrote:
> I have a JRuby 1.1RC2 application, with Rails 2.0.2, almost ready
> to deploy. I've built a war file with warbler. Configuration of
> warbler is very vanilla, as is my dev installation of tomcat.
>
> The problem that I"m having is that the application relies on a set
> of jar files; all the required jar files are in lib (and so I've
> confirmed that they are packaged properly in WEB-INF/lib).
> Unfortunately, they don't appear to be being added to the classpath
> of the running webapp. An inspection of the property
> java.class.path shows only a few tomcat related jar files in the
> classpath; the library I'm using also fails miserably when it
> searches for resources amongst it's jar files.
>
> In a standalone mode, with test code, everything works fine as long
> as I set CLASSPATH to contain all the relevant jar files. Without
> setting the classpath (despite any require or load statements I may
> have), the app fails miserably; the failure is the same as when
> running under tomcat.
>
> Is there something I'm missing? Should the jars show up in the
> property java.class.path?
>
> Thanks!
>
> john
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really apply fully.
http://tomcat.apache.org/tomcat-5.5-doc/class-loader-howto.html
If you are trying to load classes/resources in WEB-INF/lib via one of
the classloaders other than the WebApp class loader(e.g from a class
in a jar not in WEB-INF/lib), I think you will have problems.
-lenny
On Mar 4, 2008, at 5:13 PM, John Woodward wrote:
> I have a JRuby 1.1RC2 application, with Rails 2.0.2, almost ready
> to deploy. I've built a war file with warbler. Configuration of
> warbler is very vanilla, as is my dev installation of tomcat.
>
> The problem that I"m having is that the application relies on a set
> of jar files; all the required jar files are in lib (and so I've
> confirmed that they are packaged properly in WEB-INF/lib).
> Unfortunately, they don't appear to be being added to the classpath
> of the running webapp. An inspection of the property
> java.class.path shows only a few tomcat related jar files in the
> classpath; the library I'm using also fails miserably when it
> searches for resources amongst it's jar files.
>
> In a standalone mode, with test code, everything works fine as long
> as I set CLASSPATH to contain all the relevant jar files. Without
> setting the classpath (despite any require or load statements I may
> have), the app fails miserably; the failure is the same as when
> running under tomcat.
>
> Is there something I'm missing? Should the jars show up in the
> property java.class.path?
>
> Thanks!
>
> john
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