Greetings, I have a need to get version information for classes that I have been packaged in a war, and loaded into Tomcat 7.0.trunk on Windows 7. For example:
System.out.println(this.getClass().getPackage().getImplementationVersion()); Assuming my.war/META-INF/MANIFEST.MF: Manifest-Version: 1.0 Implementation-Version: 1.0 getImplementationVersion() always returns null. If I review the code for WebappClassLoader the reason for this is clear. All roads lead to findResourceInternal(File, String), line 2983 in 7.x/trunk. This method makes no attempt to load the manifest from the war. My first instinct was that this is a bug. However, I did a quick check using the same scenario using Wildfly 8 and the behavior is the same. Given the clarity of the Tomcat code, and that two robust, well-tested platforms behave the same, I have to assume this is intentional. My question is this: why? Is META-INF/MANIFEST.MF not part of the war standard? I've googled, but am not enough of a java standards wonk to know what docs are authoritative on this topic. I've certainly seen examples that use it. Thanks in advance, -- m.
