/*
 * 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.log;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.service.log.LogService;

/**
 * * Bundle activator for <code>log_gs</code>. * *
 * 
 * @author Gatespace AB *
 * @version $Revision: 1.1 $
 */
public class Activator implements BundleActivator {

    static final String[] LOG_SERVICE_CLASSES = {
            org.osgi.service.log.LogService.class.getName(),
            org.knopflerfish.service.log.LogService.class.getName() };

    static final String LOG_READER_SERVICE_CLASS = org.osgi.service.log.LogReaderService.class
            .getName();

    private LogServiceFactory lsf;

    private LogReaderServiceFactory lrsf;

    private LogConfigImpl lc;

    /** BundleActivator callback. */
    public void start(BundleContext bc) {

        lc = new LogConfigImpl(bc);
        lrsf = new LogReaderServiceFactory(bc, lc);
        lsf = new LogServiceFactory(lrsf);

        // Catch all framework error and place in the log.
        LogFrameworkListener lfl = new LogFrameworkListener(lrsf);
        bc.addFrameworkListener(lfl);
        bc.addBundleListener(lfl);
        bc.addServiceListener(lfl);

        // Register our services
        bc.registerService(LOG_READER_SERVICE_CLASS, lrsf, null);
        bc.registerService(LOG_SERVICE_CLASSES, lsf, null);

        lc.setLogReaderServiceFactory(lrsf);
    }

    /** BundleActivator callback. */
    public void stop(BundleContext bc) {
        lrsf.log(new LogEntryImpl(bc.getBundle(), LogService.LOG_INFO,
                "Log stopped."));
        lrsf.stop();
        lc.ungrabIO();
    }

}