eu.serco.dhus.config.PropertiesLoader.java Source code

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Here is the source code for eu.serco.dhus.config.PropertiesLoader.java

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/*
 * Data HUb Service (DHuS) - For Space data distribution.
 * Copyright (C) 2013,2014,2015,2016 European Space Agency (ESA)
 * Copyright (C) 2013,2014,2015,2016 GAEL Systems
 * Copyright (C) 2013,2014,2015,2016 Serco Spa
 *
 * This file is part of DHuS software sources.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package eu.serco.dhus.config;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class PropertiesLoader {

    private static Log logger = LogFactory.getLog(PropertiesLoader.class);

    private static Properties rulesProps;

    private PropertiesLoader() {

    }

    public static Properties loadProperties(String propFileName) {
        InputStream inputStream = null;
        try {
            rulesProps = new Properties();

            inputStream = PropertiesLoader.class.getClassLoader().getResourceAsStream(propFileName);

            if (inputStream != null) {
                rulesProps.load(inputStream);
            } else {
                logger.error("property file '" + propFileName + "' not found in the classpath");
                throw new FileNotFoundException("property file '" + propFileName + "' not found in the classpath");
            }

        } catch (Exception e) {
            logger.error("Exception: " + e);
        } finally {
            if (inputStream != null)
                try {
                    inputStream.close();
                } catch (IOException e) {
                    logger.error("Error closing InputStream for properties file: " + e);
                    e.printStackTrace();
                }
        }
        return rulesProps;

    }

    public static String getProperty(String key) throws IOException {

        String value = "";
        try {

            value = rulesProps.getProperty(key);
            logger.info("Property[ " + key + "] = " + value);
        } catch (Exception e) {
            logger.error("Exception: " + e);
        }
        return value;
    }

}