On 25/09/2012 13:19, Elgs Chen wrote: > Dear Tomcat Developers, > > I have a question regarding the behavior of the > WebClassLoader.loadClass(String name, boolean resolve) in the > org.apache.catalina.loader package. > > I have the following assumptions, please correct me if any is wrong: > 1, It seems the WebClassLoader only uses the SystemClassLoader (or > AppClassLoader) to loader tomcat core classes, like ServletDef;
Wrong. See [1]. > 2, It seems if tomcat is started up by the startup.sh from the bin directory, > the classpath in the startup command line will include only the jars in the > bin directory: bootstrap.jar, commons-daemon.jar and tomcat-juli.jar; Correct. > 3, ClassLoader.getSystemClassLoader() by default returns the class loader > with the startup command-line classpath; Correct. > Now if the above three assumption are correct, it seems that it's not > possible for the WebClassLoader to load the tomcat core classes as only the > few bootstrap jars are in the system class loader's classpath. However, the > fact is the startup.sh script indeed starts tomcat up. Why? The logical conclusion would be that one or more of the assumptions is wrong. > So my question is: > How does the startup.sh shipped with tomcat binary make the WebClassLoader to > load the ServletDef? See [2], line 262. Mark [1] http://tomcat.apache.org/tomcat-7.0-doc/class-loader-howto.html [2] http://svn.apache.org/viewvc/tomcat/trunk/java/org/apache/catalina/startup/Bootstrap.java?view=annotate --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
