protected void restoreTable(RestoreTable rtm)
{
String tableName = rtm.getTableName();
int version = rtm.getTableVersion();
int myversion = DatabaseStateImpl.getInstance().getTableVersion(tableName);
Logger.getInstance().log(
"Restore table '" + tableName + "' to version " + version + " - my is " + myversion,
LOGGING_NAME,
Logger.Level.INFO);
if( myversion < version)
{
try {
DbConnectorImpl.getInstance().importTable(tableName, version, rtm.getTableDump());
} catch (ImportTableException e) {
Logger.getInstance().log("ImportTableException" + e.Message,
LOGGING_NAME, Logger.Level.WARNING);
}
}
else
{
Logger.getInstance().log(
"Table skipped - my version is newer or equal",
LOGGING_NAME,
Logger.Level.INFO);
}
}
// throws TimeoutException, InterruptedException
public void Restore()
{
Message msg;
Message.MessageType[] incentiveReply = { Message.MessageType.RESTORE_ACK, Message.MessageType.RESTORE_NACK };
Logger.getInstance().log(
"Starting restoration - sending incentive : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
// send restore incentive
TcpSender.getInstance().sendToNode(new RestoreIncentive(), targetNode);
// receive reply
setTimeout(RESTORE_TIMEOUT);
msg = accept(incentiveReply, targetNode);
if(msg is RestoreNack)
{
Logger.getInstance().log(
"Restore rejected by node : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
return;
}
Logger.getInstance().log(
"Restore accepted by node, sending tables' versions : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
// TODO: tutaj nie moze byc zadnych transakcji
// TODO: lock whole database ( all tables )
RestoreTableList rtl = new RestoreTableList(DatabaseStateImpl.getInstance().getTableVersions());
TcpSender.getInstance().sendToNode(rtl, targetNode);
Logger.getInstance().log(
"Awaiting ack : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
// receive reply
setTimeout(RESTORE_TIMEOUT);
msg = accept(Message.MessageType.RESTORE_ACK, targetNode);
Logger.getInstance().log(
"Got ack, trasfering tables : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
// send all tables
foreach(TableVersion tv in rtl.getTables())
{
Logger.getInstance().log(
"Transfering table '" + tv.Name + "' version " + tv.Version + " : " + targetNode.ToString(),
LOGGING_NAME,
Logger.Level.INFO);
String dump;
try {
dump = DbConnectorImpl.getInstance().dumpTable(tv.Name);
RestoreTable rt = new RestoreTable(tv.Version, tv.Name, dump);
TcpSender.getInstance().sendToNode(rt, targetNode);
} catch (DumpTableException e) {
Logger.getInstance().log(
"DumpTableException " + e.Message,
LOGGING_NAME,
Logger.Level.WARNING);
RestoreTable rt = new RestoreTable(tv.Version, tv.Name, "");
TcpSender.getInstance().sendToNode(rt, targetNode);
}
}
// finished
}
