GCalActivator.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.io.gcal.internal;

import org.openhab.core.events.EventPublisher;
import org.openhab.core.items.ItemRegistry;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.util.tracker.ServiceTracker;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Extension of the default OSGi bundle activator
 *
 * @author Thomas.Eichstaedt-Engelen
 * @since 0.7.0
 */
public final class GCalActivator implements BundleActivator {

    private static Logger logger = LoggerFactory.getLogger(GCalActivator.class);

    private static BundleContext context;

    public static ServiceTracker<ItemRegistry, ItemRegistry> itemRegistryTracker;
    public static ServiceTracker<EventPublisher, EventPublisher> eventPublisherTracker;

    /**
     * Called whenever the OSGi framework starts our bundle
     */
    @Override
    public void start(BundleContext bc) throws Exception {
        context = bc;

        itemRegistryTracker = new ServiceTracker<ItemRegistry, ItemRegistry>(bc, ItemRegistry.class, null);
        itemRegistryTracker.open();

        eventPublisherTracker = new ServiceTracker<EventPublisher, EventPublisher>(bc, EventPublisher.class, null);
        eventPublisherTracker.open();

        logger.debug("Google Calendar IO has been started.");
    }

    /**
     * Called whenever the OSGi framework stops our bundle
     */
    @Override
    public void stop(BundleContext bc) throws Exception {
        context = null;
        itemRegistryTracker.close();
        eventPublisherTracker.close();

        logger.debug("Google Calendar IO has been stopped.");
    }

    /**
     * Returns the bundle context of this bundle
     *
     * @return the bundle context
     */
    public static BundleContext getContext() {
        return context;
    }

}