httpserver.java

OSGI这是一个中间件,与UPNP齐名,是用于移植到嵌入式平台之上

/*
 * Copyright (c) 2003, 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.Enumeration;
import java.util.Hashtable;

import org.knopflerfish.service.log.LogRef;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.cm.ConfigurationException;

public class HttpServer {

    // private fields

    private final HttpConfig httpConfig;

    private final Registrations registrations;

    private final ServletContextManager contextManager;

    private final HttpServiceFactory serviceFactory;

    private final HttpSessionManager sessionManager;

    private final TransactionManager transactionManager;

    private final SocketListener httpSocketListener;

    private final SocketListener httpsSocketListener;

    private ServiceRegistration httpReg = null;

    private BundleContext bc = null;

    // constructors

    public HttpServer(BundleContext bc, final HttpConfig httpConfig,
            final LogRef log) {

        this.bc = bc;
        this.httpConfig = httpConfig;
        registrations = new Registrations();

        contextManager = new ServletContextManager(httpConfig, log,
                registrations);
        serviceFactory = new HttpServiceFactory(log, registrations,
                contextManager);

        sessionManager = new HttpSessionManager(httpConfig);
        transactionManager = new TransactionManager(log, registrations,
                sessionManager);

        httpSocketListener = new SocketListener(httpConfig.HTTP, log,
                transactionManager, bc);
        httpsSocketListener = new SocketListener(httpConfig.HTTPS, log,
                transactionManager, bc);
    }

    // public methods

    public HttpConfig getHttpConfig() {
        return httpConfig;
    }

    public HttpServiceFactory getHttpServiceFactory() {
        return serviceFactory;
    }

    public void updated() throws ConfigurationException {

        try {
            httpSocketListener.updated();
            httpsSocketListener.updated();
            Dictionary conf = httpConfig.getConfiguration();

            Hashtable props = new Hashtable();
            for (Enumeration e = conf.keys(); e.hasMoreElements();) {
                Object key = e.nextElement();
                Object val = conf.get(key);
                props.put(key, val);
            }
            // UPnP Ref impl need this
            props.put("openPort", props.get(HttpConfig.HTTP_PORT_KEY));

            // register and/or update service properties
            if (httpReg == null) {
                httpReg = bc.registerService(HttpServiceImpl.HTTP_INTERFACES,
                        getHttpServiceFactory(), props);
            } else {
                httpReg.setProperties(props);
            }
        } catch (ConfigurationException e) {
            // If configuration failed, make sure we don't have
            // any registered service
            if (httpReg != null) {
                httpReg.unregister();
                httpReg = null;
            }
            // and rethrow the exception
            throw e;
        }
    }

    public void destroy() {

        if (httpSocketListener != null) {
            httpSocketListener.destroy();
        }
        if (httpsSocketListener != null) {
            httpsSocketListener.destroy();
        }
        if (httpReg != null) {
            httpReg.unregister();
            httpReg = null;
        }
    }

} // HttpServer