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Date: Wed, 16 Feb 2011 15:19:57 +0000 (UTC)
From: "Stepan Koltsov (JIRA)" <jira@apache.org>
To: dev@jackrabbit.apache.org
Message-ID: 
 <1656561059.20790.1297869597653.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] Created: (JCR-2896) WebdavResponseImpl should cache
 TransformerFactory
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WebdavResponseImpl should cache TransformerFactory
--------------------------------------------------

                 Key: JCR-2896
                 URL: https://issues.apache.org/jira/browse/JCR-2896
             Project: Jackrabbit Content Repository
          Issue Type: Bug
          Components: jackrabbit-webdav
    Affects Versions: 2.2.2
            Reporter: Stepan Koltsov


JackrabbitResponeImpl.sendXmlResponse creates an instance of TransformerFactory on each invocation. We see, that this TransformerFactory initialization consumes significant amount of time, because of complex logic inside:

{code}
    at java.lang.String.intern(Native Method)
    at java.util.jar.Attributes$Name.<init>(Attributes.java:449)
    at java.util.jar.Attributes.putValue(Attributes.java:151)
    at java.util.jar.Attributes.read(Attributes.java:404)
    at java.util.jar.Manifest.read(Manifest.java:234)
    at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:188)
    at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:176)
    at java.util.jar.JarVerifier.processEntry(JarVerifier.java:277)
    at java.util.jar.JarVerifier.update(JarVerifier.java:188)
    at java.util.jar.JarFile.initializeVerifier(JarFile.java:321)
    at java.util.jar.JarFile.getInputStream(JarFile.java:386)
    at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:144)
    at java.net.URL.openStream(URL.java:1009)
    at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1170)
    at javax.xml.transform.SecuritySupport$4.run(SecuritySupport.java:94)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.xml.transform.SecuritySupport.getResourceAsStream(SecuritySupport.java:87)
    at javax.xml.transform.FactoryFinder.findJarServiceProvider(FactoryFinder.java:250)
    at javax.xml.transform.FactoryFinder.find(FactoryFinder.java:223)
    at javax.xml.transform.TransformerFactory.newInstance(TransformerFactory.java:102)
    at org.apache.jackrabbit.webdav.WebdavResponseImpl.sendXmlResponse(WebdavResponseImpl.java:163)
{code}

TransformerFactory can be cached in static field:

private static final TransofmerFactory transformerFactory = TransformerFactory.newInstance().

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