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package org.openslx.bwlp.sat.thrift.cache;
import java.sql.SQLException;
import java.util.List;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.thrift.transport.TTransportException;
import org.openslx.bwlp.sat.database.mappers.DbOsVirt;
import org.openslx.bwlp.thrift.iface.OperatingSystem;
import org.openslx.thrifthelper.ThriftManager;
import org.openslx.util.QuickTimer;
import org.openslx.util.QuickTimer.Task;
/**
* Holds the list of all known operating systems. The list is synchronized with
* the master server.
*/
public class OperatingSystemList extends CacheBase<List<OperatingSystem>> {
private static final Logger LOGGER = LogManager.getLogger(OperatingSystemList.class);
private static final OperatingSystemList instance = new OperatingSystemList();
public static List<OperatingSystem> get() {
return instance.getInternal();
}
@Override
protected List<OperatingSystem> getCallback() {
final List<OperatingSystem> list;
try {
list = ThriftManager.getMasterClient().getOperatingSystems();
} catch (Exception e1) {
LOGGER.warn("Could not fetch OS list from master, using local data...",
e1 instanceof TTransportException ? null : e1);
try {
return DbOsVirt.getOsList();
} catch (Exception e) {
LOGGER.warn("Using local OS list from database also failed.", e);
}
return null;
}
QuickTimer.scheduleOnce(new Task() {
@Override
public void fire() {
try {
DbOsVirt.storeOsList(list);
} catch (SQLException e) {
}
}
});
return list;
}
}
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