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/*
* Sonar, open source software quality management tool.
* Copyright (C) 2009 SonarSource SA
* mailto:contact AT sonarsource DOT com
*
* Sonar is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* Sonar 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Sonar; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.server.plugins;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.io.IOUtils;
import org.slf4j.LoggerFactory;
import org.sonar.api.ServerComponent;
import org.sonar.api.utils.HttpDownloader;
import org.sonar.api.utils.Logs;
import org.sonar.updatecenter.common.UpdateCenter;
import org.sonar.updatecenter.common.UpdateCenterDeserializer;
import java.io.InputStream;
import java.net.URI;
import java.util.Properties;
/**
* HTTP client to load data from the remote update center hosted at http://update.sonarsource.org.
* @since 2.2
*/
public class UpdateCenterClient implements ServerComponent {
public static final String URL_PROPERTY = "sonar.updatecenter.url";
public static final String DEFAULT_URL = "http://update.sonarsource.org/update-center.properties";
public static final int PERIOD_IN_MILLISECONDS = 60 * 60 * 1000;
private String url;
private UpdateCenter center = null;
private long downloadDate = 0;
private HttpDownloader downloader;
/**
* for unit tests
*/
UpdateCenterClient(HttpDownloader downloader, String url) {
this.downloader = downloader;
this.url = url;
Logs.INFO.info("Update center: " + url);
}
public UpdateCenterClient(HttpDownloader downloader, Configuration configuration) {
this(downloader, configuration.getString(URL_PROPERTY, DEFAULT_URL));
}
public UpdateCenter getCenter() {
return getCenter(false);
}
public UpdateCenter getCenter(boolean forceRefresh) {
if (center == null || forceRefresh || needsRefresh()) {
center = download();
downloadDate = System.currentTimeMillis();
}
return center;
}
private boolean needsRefresh() {
return downloadDate + PERIOD_IN_MILLISECONDS < System.currentTimeMillis();
}
private UpdateCenter download() {
InputStream input = null;
try {
input = downloader.openStream(new URI(url));
if (input != null) {
Properties properties = new Properties();
properties.load(input);
return UpdateCenterDeserializer.fromProperties(properties);
}
} catch (Exception e) {
LoggerFactory.getLogger(getClass()).error("Fail to download data from update center", e);
} finally {
IOUtils.closeQuietly(input);
}
return null;
}
}
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