de.jollyday.configuration.impl.URLConfigurationProvider Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jollyday Show documentation

This API determines the holidays for a given year, country/name and eventually state/region. The holiday data is stored in XML files (one for each country) and will be read from the classpath. You can provide your own holiday calendar XML file or use any of the provided ones. Currently there are 63 countries supported like the following: United States, most european countries, Russia, India, Australia. Besides those there will be more special calendars like currently existing NYSE calendar (New York Stock Exchange).

There is a newer version: 0.5.10

Show newest version

/**
 * Copyright 2012 Sven Diedrichsen
 *
 * 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 de.jollyday.configuration.impl;

import java.io.InputStream;
import java.net.URL;
import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;

import de.jollyday.configuration.ConfigurationProvider;

/**
 * An {@link ConfigurationProvider} implementation which reads a list of URLs
 * provided by the system property 'de.jollyday.config.urls' in order they are
 * provided into a {@link Properties} instance.
 *
 * @author Sven Diedrichsen
 */
public class URLConfigurationProvider implements ConfigurationProvider {

	private static final Logger LOG = Logger
			.getLogger(URLConfigurationProvider.class.getName());

	/**
	 * Returns the properties by reading from the URLs provided by the system
	 * property 'de.jollyday.config.urls'.
	 */
	@Override
	public Properties getProperties() {
		Properties properties = new Properties();
		String configURLs = System.getProperty(CONFIG_URLS_PROPERTY);
		if (configURLs != null) {
			String[] strConfigURLs = configURLs.split(",");
			for (String strURL : strConfigURLs) {
				readPropertiesFromURL(properties, strURL);
			}
		}
		return properties;
	}

	private void readPropertiesFromURL(Properties properties, String strURL) {
		if (strURL == null || "".equals(strURL))
			return;
		InputStream inputStream = null;
		try {
			URL configURL = new URL(strURL.trim());
			inputStream = configURL.openStream();
			properties.load(inputStream);
		} catch (Exception e) {
			LOG.log(Level.WARNING, "Cannot read configuration from '" + strURL
					+ "'.", e);
		} finally {
			closeStreamFromURL(strURL, inputStream);
		}
	}

	private void closeStreamFromURL(String strURL, InputStream inputStream) {
		if (inputStream != null) {
			try {
				inputStream.close();
			} catch (Exception e) {
				LOG.warning("Cannot close stream for configuration URL "
						+ strURL + ".");
			}
		}
	}

}