[jboss-jira] [JBoss JIRA] Created: (JBAS-8583) facelets class loading takes much longer time after migrating from JBoss EAP 4.3 to 5.0

[Gary Hu (JIRA)]

facelets class loading takes much longer time after migrating from JBoss EAP 4.3 to 5.0
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                 Key: JBAS-8583
                 URL: https://jira.jboss.org/browse/JBAS-8583
             Project: JBoss Application Server
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: JBossAS-5.0.0.GA
            Reporter: Gary Hu


The facelets 1.1.15.B1 is placed under the $JBOSS_HOME/server/$PROFILE/lib folder. 

In EAP 4.3, it takes about 2s to load the facelets library, but in EAP 5.0 it takes about 15s.

The following facelets code is analyzed, which tells us the slowness comes from the facelets library loading:
   
public static URL[] search(ClassLoader cl, String prefix, String suffix) throws IOException {
  Enumeration[] e = new Enumeration[] {
    cl.getResources(prefix),
    cl.getResources(prefix + "MANIFEST.MF")
  };
  Set all = new LinkedHashSet();
  URL url;
  URLConnection conn;
  JarFile jarFile;
  for (int i = 0, s = e.length; i < s; ++i) {
    while (e[i].hasMoreElements()) {
      url = (URL) e[i].nextElement();
      conn = url.openConnection();
      conn.setUseCaches(false);
      conn.setDefaultUseCaches(false);
      if (conn instanceof JarURLConnection) {
	jarFile = ((JarURLConnection) conn).getJarFile();
      } else {
	jarFile = getAlternativeJarFile(url);
      }
      if (jarFile != null) {
	searchJar(cl, all, jarFile, prefix, suffix);
      } else {
	boolean searchDone = searchDir(all, new File(URLDecoder.decode(url.getFile(), "UTF-8")), suffix);
        if (!searchDone)
	{
	  searchFromURL(all, prefix, suffix, url);
	}
      }
    }
  }
  URL[] urlArray = (URL[]) all.toArray(new URL[all.size()]);
  return urlArray;
}


This method is called from com.sun.facelets.compiler.TagLibraryConfig.loadImplicit() with the followign statement: 
  ClassLoader cl = Thread.currentThread().getContextClassLoader();
  URL[] urls = Classpath.search(cl, "META-INF/", SUFFIX); //SUFFIX is ".taglib.xml"




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