2013/11/21 <it-media.her...@daimler.com>:
> Hi,
>
Please file an issue in Bugzilla against the Jasper component
> consider the following (simplified) project configuration.
>
> web_base_jar (shared taglib etc.)
> web_war (uses web_base_jar)
>
So, you have two projects in Eclipse IDE.
The "war" project references "jar" project as a dependency in its Java
Build Path configuration.
> When developing our web project locally we use an exploded war layout. The
> compile output of web_base_jar is directly copied (not as a jar!) to the war’s
> web_war/WEB-INF/classes directory by our ide’s (eclipse with sysdeo plugin
> and intellij). Our shared taglib ends up here:
> web_war/WEB-INF/classes/META-INF/myTaglib.tld. The taglib is successfully
> picked up by the Jar Scanner configured with “scanAllDirectories”.
>
> This leads to the following generated jsp code when myTaglib is used:
>
> static {
> _jspx_dependants = new
> java.util.HashMap<java.lang.String,java.lang.Long>(1);
>
> _jspx_dependants.put("file:/somepath/pc_web_war_exploded/WEB-INF/classes/META-INF/
> myTaglib.tld ", Long.valueOf(-1L));
> }
It should not be -1. Here the things start going wrong.
> The relevant code for this snippet is in
> org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:173).
> Because the Taglib is a file uri
> (file:/C:/somepath/pc_web_war_exploded/WEB-INF/classes/META-INF/myTaglib.tld)
> it is not found by ApplicationContext#getResource and the method
> org.apache.jasper.JspCompilationContext.getLastModified(JspCompilationContext.java:437)
> returns -1 in this case.
>
> When the compiler checks if the current jsp is outdated it checks also all
> includes/dependants. Because myTaglib is in the dependants list of our jsps
> it is also checked. The check tests
> the lastModified timestamp of the file against -1 and returns always true.
> See here org.apache.jasper.compiler.Compiler.isOutDated(Compiler.java:519)
> This means that our jsps are recompiled on every request. We have some
> workarounds for this but it would be nice if this setup would work
>
> Tomcat Version: 7.0.47
>
> Thanks and regards
>
> Philip Herbst
>
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