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//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
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//  and Apache License v2.0 which accompanies this distribution.
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//      The Apache License v2.0 is available at
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package org.eclipse.jetty.util.preventers;

import javax.xml.parsers.DocumentBuilderFactory;

DOMLeakPreventer
See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6916498
Prevent the RuntimeException that is a static member of AbstractDOMParser
from pinning a webapp classloader by causing it to be set here by a non-webapp classloader.
Note that according to the bug report, a heap dump may not identify the GCRoot, making
it difficult to identify the cause of the leak.
/**
 * DOMLeakPreventer
 *
 * See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6916498
 *
 * Prevent the RuntimeException that is a static member of AbstractDOMParser
 * from pinning a webapp classloader by causing it to be set here by a non-webapp classloader.
 *
 * Note that according to the bug report, a heap dump may not identify the GCRoot, making
 * it difficult to identify the cause of the leak.
 */
public class DOMLeakPreventer extends AbstractLeakPreventer
{

    
See Also:
prevent.prevent(ClassLoader)/**
     * @see org.eclipse.jetty.util.preventers.AbstractLeakPreventer#prevent(java.lang.ClassLoader)
     */
    @Override
    public void prevent(ClassLoader loader)
    {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        try
        {
            factory.newDocumentBuilder();
        }
        catch (Exception e)
        {
            LOG.warn(e);
        }
    }
}