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Liferay Application List API

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.application.list.adapter;

import com.liferay.application.list.PanelApp;
import com.liferay.osgi.util.ServiceTrackerFactory;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import javax.portlet.Portlet;

import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.util.tracker.ServiceTracker;

/**
 * @author Adolfo Pérez
 */
@Component(immediate = true, service = Object.class)
public class PortletPanelAppAdapterRegistry {

	@Activate
	protected void activate(BundleContext bundleContext) {
		_serviceTracker = ServiceTrackerFactory.open(
			bundleContext, Portlet.class,
			new PortletPanelAppAdapterServiceTrackerCustomizer(
				bundleContext, _serviceRegistrations));
	}

	@Deactivate
	protected void deactivate() {
		_serviceTracker.close();

		for (ServiceRegistration serviceRegistration :
				_serviceRegistrations.values()) {

			try {
				serviceRegistration.unregister();
			}
			catch (IllegalStateException ise) {
				_log.error(ise);
			}
		}

		_serviceRegistrations.clear();
	}

	private static final Log _log = LogFactoryUtil.getLog(
		PortletPanelAppAdapterRegistry.class);

	private final
		Map, ServiceRegistration>
			_serviceRegistrations = new ConcurrentHashMap<>();
	private ServiceTracker _serviceTracker;

}