Hi folks, Could you please recommend your favourite reference for Java Network Programming or how to use the java.net package effectively and efficiently... Thanks Peter -----Original Message----- From: Riley, Cameron <[EMAIL PROTECTED]> To: '[EMAIL PROTECTED]' <[EMAIL PROTECTED]> Date: Thursday, January 04, 2001 6:11 PM Subject: RE: TOMCAT 4.0 / Catalina Policy / Reading files >Craig, > >Thanks for your prompt reply. > >>The first thing to understand is that security manager support in Tomcat >4.0 is >>not complete yet. This should be fixed within the next couple weeks. By >>default, it is not enabled -- the exception above has a different cause. > >No worries. Thanks for all your work on Catalina. > >>Yes. The docs about Java2's security model are in the JDK 1.2 or 1.3 >>documentation bundle, under the "Security" heading. > >I read through them but have never had to digest them before, hence some >confusion on my part. > >>However, a sealing violation error occurs under the following >circumstances: >>* Classes are packaged into JAR files (assume your classes >> are in package com.mycompany.mypackage). >>* JAR files are marked as "sealed" in the JAR manifest entry. >>* You attempt to load a class in the "com.mycompany.mypackage" >> class from some *other* JAR file. >> >>The basic idea of sealing is that a Java package can say "all of the >classes in >>this package are in this JAR file -- any classes who claim they are part of >this >>package from elsewhere are imposters." > >ok I was barking up the wrong tree then, I thought it was the reference to a >File Object pointing outside of Tomcat which was causing it. > >In my case I have 'mypackage' classes compiled to /WEB-INF/classes without >being jarred. The particular class and method that is causing the sealed >Exception is in package com.mycompany.util, the method though uses Objects >from jdom-b5.jar. The jdom JAR is in the /WEB-INF/lib, it isnt marked >"sealed" and my classes arent in a JAR. Are classes compiled to >/WEB-INF/classes assumed sealed? I tried adding a manifest file to the >/classes/meta-inf directory but to no effect. > > > >Cameron Riley > > > > > > > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [EMAIL PROTECTED] >For additional commands, email: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
