Mercurial > hg > blitz_condensed
diff src/org/dancres/blitz/txn/TxnOp.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/txn/TxnOp.java Sat Mar 21 11:00:06 2009 +0000 @@ -0,0 +1,22 @@ +package org.dancres.blitz.txn; + +import java.io.Serializable; +import java.io.IOException; + +import org.dancres.blitz.entry.OpInfo; + +/** + <p> + Each separate operation of a Transaction identified by TxnId is a TxnOp + which should implement this interface. TxnOp's are repeatable, disk-level + actions which can be logged to disk and re-applied during system recovery. + </p> + */ +public interface TxnOp extends Serializable { + /** + Must be invoked inside an active DiskTxn. + */ + public void restore(TxnState aState) throws IOException; + public void commit(TxnState aState) throws IOException; + public void abort(TxnState aState) throws IOException; +}