Package org.apache.cassandra.service

Class SSTablesGlobalTracker

  • All Implemented Interfaces:
    INotificationConsumer
    public class SSTablesGlobalTracker
extends java.lang.Object
implements INotificationConsumer
    Tracks all sstables in use on the local node.

    Each table tracks its own SSTables in ColumnFamilyStore (through Tracker) for most purposes, but this class groups information we need on all the sstables the node has.

    • Constructor Detail

      • SSTablesGlobalTracker

        public SSTablesGlobalTracker​(SSTableFormat<?,​?> currentSSTableFormat)

    • Method Detail

      • versionsInUse

        public java.util.Set<Version> versionsInUse()
        The set of all sstable versions currently in use on this node.

      • register

        public boolean register​(INotificationConsumer subscriber)
        Register a new subscriber to this tracker. Registered subscribers are currently notified when the set of sstable versions in use changes, using a SSTablesVersionsInUseChangeNotification.
        Parameters:
        subscriber - the new subscriber to register. If this subscriber is already registered, this method does nothing (meaning that even if a subscriber is registered multiple times, it will only be notified once on every change).
        Returns:
        whether the subscriber was register (so whether it was not already registered).

      • unregister

        public boolean unregister​(INotificationConsumer subscriber)
        Unregister a subscriber from this tracker.
        Parameters:
        subscriber - the subscriber to unregister. If this subscriber is not registered, this method does nothing.
        Returns:
        whether the subscriber was unregistered (so whether it was registered subscriber of this tracker).