Package org.knopflerfish.bundle.http

Source Code of org.knopflerfish.bundle.http.ServletRegistration

/*
* Copyright (c) 2003-2009, KNOPFLERFISH project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
*   copyright notice, this list of conditions and the following
*   disclaimer in the documentation and/or other materials
*   provided with the distribution.
*
* - Neither the name of the KNOPFLERFISH project nor the names of its
*   contributors may be used to endorse or promote products derived
*   from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package org.knopflerfish.bundle.http;

import java.util.Dictionary;
import java.util.Hashtable;

import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;

import org.osgi.service.http.HttpContext;

public class ServletRegistration implements Registration {

    // private fields

    private final ServletContextManager contextManager;

    private final Registrations registrations;

    private final RequestDispatcherImpl dispatcher;

    /**
     * HACK CSM
     */
    private long lastModificationDate;

    // constructors

    public ServletRegistration(final String alias,
                               final Servlet servlet,
                               Dictionary parameters,
                               final HttpContext httpContext,
                               final ServletContextManager contextManager,
                               final Registrations registrations)
        throws ServletException
    {
        if (parameters == null)
            parameters = new Hashtable();

        if (parameters.get(HttpUtil.SERVLET_NAME_KEY) == null)
            parameters.put(HttpUtil.SERVLET_NAME_KEY, servlet.getClass()
                    .getName());

        this.contextManager = contextManager;
        this.registrations = registrations;

        // Fail fast if servlet already registered!
        registrations.addServlet(servlet);

        final ServletContext context = contextManager.getServletContext(
                httpContext, null);
        final ServletConfig config = new ServletConfigImpl(parameters, context);
        servlet.init(config);

        dispatcher = new RequestDispatcherImpl(alias, servlet, httpContext,
                                               lastModificationDate);
    }

    // implements Registration

    public RequestDispatcherImpl getRequestDispatcher(final String uri)
    {
        dispatcher.setURI(uri);

        return dispatcher;
    }

    public void destroy()
    {
        final Servlet servlet = dispatcher.getServlet();
        final ServletConfig cfg = servlet.getServletConfig();
        final ServletContext context = cfg != null ? cfg.getServletContext() : null;
        servlet.destroy();
        if (context != null) {
          contextManager.ungetServletContext(context);
        }
        registrations.removeServlet(servlet);
    }

    /**
     * HACK CSM
     */
    public long getLastModificationDate()
    {
        return lastModificationDate;
    }

} // ServletRegistration
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