MessagesService.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.binding.mailcontrol.service;

import java.util.Dictionary;
import java.util.Set;

import org.creek.accessemail.connector.mail.ConnectorException;
import org.creek.accessemail.connector.mail.MailConnector;
import org.creek.mailcontrol.model.message.TransformException;
import org.openhab.core.events.EventPublisher;
import org.openhab.core.types.Command;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Receives messages in JSON format and submits them for further processing.
 *
 * @author Andrey.Pereverzin
 * @since 1.7.0
 */
public class MessagesService<T extends Command> {
    private static final Logger logger = LoggerFactory.getLogger(MessagesService.class);

    private final MailConnector mailConnector;
    private final MessagesProcessor<T> messagesProcessor;

    static final String REQUEST_SUBJECT = "OpenHABRequest";

    public MessagesService(MailConnector mailConnector, EventPublisher eventPublisher, Dictionary<String, ?> config) {
        this.mailConnector = mailConnector;
        this.messagesProcessor = new MessagesProcessor<T>(mailConnector, eventPublisher, config);
    }

    public MessagesService(MailConnector mailConnector, MessagesProcessor<T> messagesProcessor) {
        this.mailConnector = mailConnector;
        this.messagesProcessor = messagesProcessor;
    }

    public void receiveMessages() throws ServiceException {
        logger.debug("Receiving messages: " + REQUEST_SUBJECT);
        try {
            Set<Object> messages = mailConnector.receiveMessages(REQUEST_SUBJECT);
            logger.debug("Messages received: " + messages.size());

            if (messages.size() > 0) {
                messagesProcessor.processReceivedMessages(messages);
            }
        } catch (TransformException ex) {
            throw new ServiceException(ex);
        } catch (ConnectorException ex) {
            throw new ServiceException(ex);
        }
    }
}