Package org.knopflerfish.bundle.console

Source Code of org.knopflerfish.bundle.console.Activator

/*
* 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.console;

import java.util.ArrayList;
import java.util.Iterator;

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

// ******************** Console ********************
/**
* Bundle activator implementation.
*
* @author Anders Rimen
* @version $Revision: 1.1.1.1 $
*/
public class Activator
  implements BundleActivator
{
    static private final String logServiceName
      = org.osgi.service.log.LogService.class.getName();

    static private final String consoleServiceName
      = org.knopflerfish.service.console.ConsoleService.class.getName();

    BundleContext bc;

    ServiceRegistration consoleReg;

    // The set of active sessions that must be closed when this
    // bundle is stopped.
    static final ArrayList /*<SessionImpl>*/ sessions = new ArrayList();

    /**
     * Called by the framework when this bundle is started.
     *
     * @param bc Bundle context.
     */
    public void start(BundleContext bc) {
        this.bc = bc;

        log(LogService.LOG_INFO, "Starting version "
                + bc.getBundle().getHeaders().get("Bundle-Version"));

        consoleReg = bc.registerService(consoleServiceName,
                new ConsoleServiceImpl(bc), null);
    }

    /**
     * * Called by the framework when this bundle is stopped. * *
     *
     * @param bc
     *            Bundle context.
     */
    public void stop(BundleContext bc) {
        log(LogService.LOG_INFO, "Stopping");
        ArrayList currentSessions = new ArrayList(sessions);
        for (Iterator it = currentSessions.iterator(); it.hasNext();) {
          SessionImpl s = (SessionImpl) it.next();
          s.bundleStopped();
        }
    }

    /**
     * Utility method used for logging.
     *
     * @param level Log level
     * @param msg Log message
     */
    void log(int level, String msg) {
        ServiceReference srLog = bc.getServiceReference(logServiceName);
        if (srLog != null) {
            LogService sLog = (LogService) bc.getService(srLog);
            if (sLog != null) {
                sLog.log(level, msg);
            }
            bc.ungetService(srLog);
        }
    }
}
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