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POHow do I read the manifest file for a webapp running in apache tomcat?
 

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  1. POHow do I read the manifest file for a webapp running in apache tomcat?
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    <p>I have a webapp which contains a manifest file, in which I write the current version of my application during an ant build task. The manifest file is created correctly, but when I try to read it in during runtime, I get some strange side-effects. My code for reading in the manifest is something like this:</p> <pre><code> InputStream manifestStream = Thread.currentThread() .getContextClassLoader() .getResourceAsStream("META-INFFFF/MANIFEST.MF"); try { Manifest manifest = new Manifest(manifestStream); Attributes attributes = manifest.getMainAttributes(); String impVersion = attributes.getValue("Implementation-Version"); mVersionString = impVersion; } catch(IOException ex) { logger.warn("Error while reading version: " + ex.getMessage()); } </code></pre> <p>When I attach eclipse to tomcat, I see that the above code works, but it seems to get a different manifest file than the one I expected, which I can tell because the ant version and build timestamp are both different. Then, I put "META-INFFFF" in there, and the above code still works! This means that I'm reading some other manifest, not mine. I also tried</p> <pre><code>this.getClass().getClassLoader().getResourceAsStream(...) </code></pre> <p>But the result was the same. What's the proper way to read the manifest file from inside of a webapp running in tomcat?</p> <p><strong>Edit</strong>: Thanks for the suggestions so far. Also, I should note that I <em>am</em> running tomcat standalone; I launch it from the command line, and then attach to the running instance in Eclipse's debugger. That shouldn't make a difference, should it?</p>
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    1. CO@PascalThivent's answer is the right way to it. Add some exception handling in case your MANIFEST does not exist (ie.:IDE) and it should be A1.
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