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From Glen Mazza <>
Subject Remove the Tomcat JSP precompile tasks?
Date Sat, 13 Apr 2013 13:47:55 GMT
Anyone mind if we get rid of the Tomcat JSP precompile option in the 
build.xml?  It's of limited usefulness today (we're presently compiling 
with old Tomcat 5.x stuff), the presence of Tomcat 5.x stuff makes the 
project look old, and the tasks involved just add a lot of bloat to the 
build.xml file.  According to the build.xml:

   <!-- This target builds a WAR file that is specially pre-compiled
        for use with Tomcat. By generating and pre-compiling JSPs
        ahead of time (instead of having Tomcat do it on-the-fly
        at runtime), we provide a slight runtime speed bump. In
        addition, in security-conscious environments this means
        that we can eliminate the need for the Jasper JSP compiler,
        and can run Tomcat using just a JRE instead of a full JDK.

The "slight runtime speed bump" is only for startup after initial 
deployment but even then JSPWiki is quite zippy, performance is not an 
issue.  As for security, I really doubt "security conscious 
environments" are going to rely on end-of-life Tomcat 5.0-precompiled 
JSPs but will instead precompile it *themselves* with the precise JDK 
and servlet container versions they are using in production (not 
everyone is using Tomcat, and even those who are are mostly on Tomcat 7 
today).  How to precompile JSPs is a servlet container (& potentially 
servlet container version) specific process for *any* WAR (not just 
JSPWiki) and users need to consult their app server-specific 
documentation for the precise and secure way of doing that, for those 
who actually care about doing so.  Even on the Maven side, the 
corresponding plugin stops at Tomcat 6:, 
i.e., people just aren't doing this that much today.


On 04/03/2013 03:43 PM, Juan Pablo Santos Rodríguez wrote:
> Hi Glen,
> the precompile JSPs option is available through the *-tomcat targets (line
> 1124 onwards) on build.xml, and are meant to enable running the webapp with
> only a JRE, instead of a JDK. They're not part of the main build, so it
> doesn't seem related to me.
> The org.gjt.xpp seems odd to me though, where does it comes from (maybe the
> xerces jars)? Can you try specifying the jaxen dependency as:
>          <dependency>
>              <groupId>jaxen</groupId>
>              <artifactId>jaxen</artifactId>
>              <version>1.1-beta-6</version>
>              <exclusions>
>                <exclusion>
>                  <groupId>*</groupId>
>                  <artifactId>*</artifactId>
>                </exclusion>
>              </exclusions>
>          </dependency>
> to see if it helps? Right now I'm not on my pc so I'm unable to try it
> HTH,
> juan pablo
> On Wed, Apr 3, 2013 at 12:00 AM, Glen Mazza <> wrote:
>> Hi folks, "mvn clean install" and "ant war" will now create nearly
>> identical WARs (differing only in the WEB-INF/lib folder) -- but ATM only
>> the latter still works. I think it's something related to the precompiled
>> JSPs (which the Maven WAR doesn't rely on presently, but I'm not sure where
>> they are in the Ant WAR, so???)  When running the Mavenized version,  the
>> JSPWiki log files are reporting:
>> 2013-04-02 17:29:51,149 [http-bio-8080-exec-6] WARN*
>> *WikiTagBase JSPWiki:/JSPWiki/ JSPWiki:http://localhost:8080/**JSPWiki/<http://localhost:8080/JSPWiki/>-
Including failed, got a servlet exception from sub-page. Rethrowing the
>> exception to the JSP engine.
>> org.apache.jasper.**JasperException: <h3>Validation error messages from
>> TagLibraryValidator for fmt in /templates/default/UserBox.**jsp</h3><p>null:
>> org.xml.sax.SAXParseException; lineNumber: 206; columnNumber: 15; parsing
>> error: org.gjt.xpp.**XmlPullParserException: end tag name should be
>> wiki:Translate not fmt:message at line 206 and column 15 seen
>> "...</jsp:text>\n</fmt:**message"... (parser state END_TAG)</p>
>>      at org.apache.jasper.compiler.**DefaultErrorHandler.jspError(**
>>      at org.apache.jasper.compiler.**ErrorDispatcher.dispatch(**
>>      at org.apache.jasper.compiler.**ErrorDispatcher.jspError(**
>> and
>>      at**java:722)
>> 2013-04-02 17:29:51,833 [http-bio-8080-exec-6] WARN*
>> *WikiTagBase JSPWiki:/JSPWiki/ JSPWiki:http://localhost:8080/**JSPWiki/<http://localhost:8080/JSPWiki/>-
Including failed, got a servlet exception from sub-page. Rethrowing the
>> exception to the JSP engine.
>> org.apache.jasper.**JasperException: java.lang.**ClassNotFoundException:
>> org.apache.jsp.templates.**default_.UserBox_jsp
>>      at org.apache.jasper.servlet.**JspServletWrapper.getServlet(**
>>      at org.apache.jasper.servlet.**JspServletWrapper.service(**
>> The Mavenized version of http://localhost:8080/JSPWiki will still
>> activate but the front page text is not visible (only the headers and
>> footers show).  I'll look into this next but if anyone can see what's
>> immediately wrong with the Maven WAR (and optionally wants to fix it),
>> please go ahead.
>> Another issue the WEB-INF/libs/*.JARs are mostly but not completely
>> identical between the Ant and Maven WARs because with Maven dependency
>> resolution, additional JARs needed by those declared dependencies are
>> brought in (unless we explicitly exclude them) while our Ant scripts will
>> not use JARs that we don't manually configure.  In particular the Jaxen
>> dependency ends up bringing in 11 additional dependencies that the Ant
>> build skips (upping the JAR count from 31 jars to 43), here are some but
>> not all of them (you can see them by running mvn dependency:tree):
>> [INFO] +- jaxen:jaxen:jar:1.1-beta-6:**compile
>> [INFO] |  +- dom4j:dom4j:jar:1.5.2:compile
>> [INFO] |  |  \- jaxme:jaxme-api:jar:0.3:**compile
>> [INFO] |  +- xerces:xmlParserAPIs:jar:2.6.**2:compile
>> [INFO] |  +- xerces:xercesImpl:jar:2.4.0:**compile
>> [INFO] |  \- xom:xom:jar:1.0b3:compile
>> [INFO] |     +-**compile
>> [INFO] |     +- xalan:xalan:jar:2.6.0:compile
>> [INFO] |     |  \- xml-apis:xml-apis:jar:1.0.b2:**compile
>> [INFO] |     \- org.ccil.cowan.tagsoup:**tagsoup:jar:0.9.7:compile
>> Do we need Jaxen today in JSPWiki anyway?  I just see RPCHandlerTest
>> failing if I don't include it.  As I understand, Jaxen was best in the
>> pre-JDK 5.0 days when there was no default XPath parser in the JDK.  If we
>> can rely on what the JDK supplies by default for XPath processing we can
>> remove a lot of extra JARs from the Maven-built WAR.
>> Besides these, there are 4 more JARs that Maven is determining necessary:
>> jakarta-regexp-1.4.jar used by lucene-queries,
>> lucene-queries used by lucene-highlighter, xpp3 used by sandler, and
>> xerces used by nekohtml.
>> Finally, IIRC we had earlier determined that Stripes was not needed in the
>> WAR (it's just used during running the test cases), so I removed it from
>> the "war" task in the Ant build.xml.  If I'm incorrect on this, we can put
>> it back in.
>> Regards,
>> Glen

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