at.molindo.notify.channel.feed.AbstractPullChannel Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of molindo-notify Show documentation
Extensible notification framework
The newest version!
/**
 * Copyright 2010 Molindo GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package at.molindo.notify.channel.feed;

import java.util.Date;
import java.util.List;

import at.molindo.notify.channel.IPullChannel;
import at.molindo.notify.dao.INotificationDAO;
import at.molindo.notify.dao.IPreferencesDAO;
import at.molindo.notify.dispatch.IDispatchService;
import at.molindo.notify.model.ConfigurableChannelPreferences;
import at.molindo.notify.model.IChannelPreferences;
import at.molindo.notify.model.IPreferences;
import at.molindo.notify.model.Message;
import at.molindo.notify.model.Notification;
import at.molindo.notify.model.Param;
import at.molindo.notify.model.Params;
import at.molindo.notify.render.IRenderService.RenderException;
import at.molindo.notify.render.IRenderService.Version;
import at.molindo.utils.data.StringUtils;

import com.google.common.collect.Lists;

public abstract class AbstractPullChannel implements IPullChannel {

	private IDispatchService _dispatchService;
	private INotificationDAO _notificationDAO;
	private IPreferencesDAO _preferencesDAO;

	public static final Param SECRET = Param.pString("secret");
	public static final Param AMOUNT = Param.pInteger("amount");

	public static final int MAX_AMOUNT = 100;
	public static final int DEFAULT_AMOUNT = 25;

	private Integer _defaultAmount = DEFAULT_AMOUNT;

	@Override
	public boolean isAuthorized(String userId, IChannelPreferences cPrefs) {
		IPreferences p = _preferencesDAO.getPreferences(userId);
		if (p == null) {
			return false;
		}
		String prefSecret = p.getParams().get(SECRET);
		String reqSecret = cPrefs.getParams().get(SECRET);

		return prefSecret != null && StringUtils.equals(prefSecret, reqSecret);
	}

	@Override
	public boolean isConfigured(Params params) {
		return true;
	}

	@Override
	public final String pull(String userId, IChannelPreferences cPrefs) throws PullException {

		IPreferences prefs = _preferencesDAO.getPreferences(userId);

		Integer amount = cPrefs.getParams().get(AMOUNT);
		if (amount == null) {
			amount = _defaultAmount;
		}

		List notifications = _notificationDAO.getRecent(userId, getNotificationTypes(), 0, amount);
		if (notifications.size() == 0) {
			throw new PullException("no notifications found");
		}

		Date lastModified = notifications.get(0).getDate();
		List messages = Lists.newArrayListWithCapacity(notifications.size());
		for (Notification notification : notifications) {
			try {
				messages.add(render(notification, prefs, cPrefs));
			} catch (RenderException e) {
				throw new PullException("failed to render notification: " + notification, e);
			}
		}

		return pull(messages, lastModified, cPrefs, prefs);

	}

	@Override
	public IChannelPreferences newDefaultPreferences() {
		ConfigurableChannelPreferences prefs = new ConfigurableChannelPreferences();
		prefs.setVersion(Version.LONG);
		return prefs;
	}

	protected Message render(final Notification notification, IPreferences prefs, IChannelPreferences cPrefs)
			throws RenderException {
		return _dispatchService.create(notification, prefs, cPrefs).getMessage();
	}

	public Integer getDefaultAmount() {
		return _defaultAmount;
	}

	public void setDefaultAmount(Integer defaultAmount) {
		_defaultAmount = defaultAmount;
	}

	public void setNotificationDAO(INotificationDAO notificationDAO) {
		_notificationDAO = notificationDAO;
	}

	public void setPreferencesDAO(IPreferencesDAO preferencesDAO) {
		_preferencesDAO = preferencesDAO;
	}

	public void setDispatchService(IDispatchService dispatchService) {
		_dispatchService = dispatchService;
	}

	/**
	 * @param dispatchService
	 * @deprecated use {@link #setDispatchService(IDispatchService)}
	 */
	@Deprecated
	public void setNotificationRenderService(IDispatchService dispatchService) {
		setDispatchService(dispatchService);
	}

	protected abstract String pull(List messages, Date lastModified, IChannelPreferences cPrefs,
			IPreferences prefs) throws PullException;

}