Hi,
I'm having problems doing JSP pre-compilation using Tomcat's JSP
pre-compilation libraries and Ant. The problem is demonstrated by the following:
test.jsp:
<% String myVar = "Hello"; %>
<%@ include file="test2.jsp" %>
Some more text
test2.jsp
<H1>Goodbye</H1>
<%= myVar + "World" %>
Testing
build.xml
<project default="compile-jsps">
<target name="compile-jsps">
<mkdir dir="${basedir}/build/web-test" description="creating classes
directory"/>
<taskdef classname="org.apache.jasper.JspC" name="jasper2"/>
<jasper2 validateXml="false" uriroot="${basedir}/web-test"
outputDir="${basedir}/build/web-test" compile="true"/>
</target>
</project>
test.jsp loads correctly when accessed from Tomcat, however, when I use Ant
with the build.xml above and Tomcat's JSP compiler libraries I get:
D:\dev\myproject\build\web-test\org\apache\jsp\test2_jsp.java:43: cannot find
symbol
symbol : variable myVar
location: class org.apache.jsp.test2_jsp
out.print( myVar + "World" );
^
1 error
I have tested this using both Tomcat 5.5.15 and Tomcat 5.5.20.
When JspC completes there are 2 Java source files, test2_jsp.java which ties up
with test2.jsp's content (making reference to myVar but not declaring it) and
test_jsp.java which contains the combined content of test.jsp and test2.jsp.
I've flagged that JspC should compile the generated source files with the
compile="true" attribute, I discovered this through looking at the Javadocs.
My gut feel is that JspC should remove any Java source files that represent
JSPs that cannot be run standalone, e.g. test2.jsp, as its final step before
completing thus leaving only Java source files that can be compiled.
The main point of reference for doing JSP pre-compilation seems to be
http://tomcat.apache.org/tomcat-5.5-doc/jasper-howto.html but it is very sparse
on this subject i.e. here's a sample build.xml, it doesn't even indicate there
is a compile option. Tomcat should document what attributes the JSPc task
supports, just like any other Ant task.
Thanks,
Martin.
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