Db4oConfiguration.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.persistence.db4o.internal;

import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.osgi.framework.BundleContext;
import org.osgi.service.cm.ManagedService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Configuration class which implements {@link ManagedService} to act as a central
 * handler for configuration issues. It holds the current configuration values
 * and gives access through static member fields.
 *
 * @author Thomas.Eichstaedt-Engelen
 * @since 1.0.0
 */
public class Db4oConfiguration {

    private static final Logger logger = LoggerFactory.getLogger(Db4oConfiguration.class);

    /**
     * the backup interval as Cron-Expression (optional, defaults to '0 0 1 * * ?' which means every morning at 1
     * o'clock)
     */
    public static String backupInterval = "0 0 1 * * ?";

    /** the commit interval in seconds (optional, default to '5') */
    public static int commitInterval = 5;

    /** the amount of backup files allowed in DB_FOLDER_NAME (optional, defaults to '7') */
    public static int maxBackups = 7;

    /**
     * {@inheritDoc}
     */
    public void activate(final BundleContext bundleContext, final Map<String, Object> config) {
        String backupIntervalString = (String) config.get("backupinterval");
        if (StringUtils.isNotBlank(backupIntervalString)) {
            backupInterval = backupIntervalString;
        }

        String commitIntervalString = (String) config.get("commitinterval");
        if (StringUtils.isNotBlank(commitIntervalString)) {
            try {
                commitInterval = Integer.valueOf(commitIntervalString);
            } catch (IllegalArgumentException iae) {
                logger.warn("couldn't parse '{}' to an integer");
            }
        }

        String maxBackupsString = (String) config.get("maxbackups");
        if (StringUtils.isNotBlank(maxBackupsString)) {
            try {
                maxBackups = Integer.valueOf(maxBackupsString);
            } catch (IllegalArgumentException iae) {
                logger.warn("couldn't parse '{}' to an integer");
            }
        }
    }

}