Mercurial > hg > blitz_condensed
diff src/org/dancres/blitz/disk/Syncable.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/org/dancres/blitz/disk/Syncable.java Sat Mar 21 11:00:06 2009 +0000 @@ -0,0 +1,23 @@ +package org.dancres.blitz.disk; + +/** + Those involved in storage management should implement this interface and + register with Disk. This facilitates, checkpointing and clean shutdown + of Blitz. + */ +public interface Syncable { + /** + When called, the instance should synchronize all "dirtied" state to + disk - i.e. if no further operations were carried out and the JVM + was stopped, recovery wouldn't be necessary because the disk contains + an accurate copy of the memory state at the point when sync() was + invoked. + */ + public void sync() throws Exception; + + /** + When called, the instance should close and release any files it is + currently using. + */ + public void close() throws Exception; +}