/**
* main() has some simple utility methods.
*
* @param argv Command line parameters.
* @exception Exception if the filesystem does not exist.
*/
public static void main(String[] argv) throws Exception {
StringUtils.startupShutdownMessage(SecondaryNameNode.class, argv, LOG);
Configuration tconf = new Configuration();
if (argv.length >= 1) {
SecondaryNameNode secondary = new SecondaryNameNode(tconf);
int ret = secondary.processArgs(argv);
System.exit(ret);
}
// Create a never ending deamon
Daemon checkpointThread = new Daemon(new SecondaryNameNode(tconf));
checkpointThread.start();
}
void init() {
pendingReplications = new HashMap<Block, PendingBlockInfo>();
timedOutItems = new ArrayList<Block>();
this.timerThread = new Daemon(new PendingReplicationMonitor());
timerThread.start();
}
void start() {
daemon.start();
}