--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/entry/WriteEscort.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,20 @@
+package org.dancres.blitz.entry;
+
+import net.jini.core.transaction.TransactionException;
+
+/**
+   Whenever a write is performed, it needs protection until commit time.
+   This is achieved by escorting the written Entry through the write process
+   with an instance of this type.  The Escort is responsible for setting
+   appropriate TxnLocks etc. to achieve the required protection.
+ */
+public interface WriteEscort {
+    /**
+       Called before the Entry which is being written actually becomes
+       available in the filesystem.  At this point, an ID has been allocated
+       etc. but the Entry is not visible outside of this thread.
+
+       @return <code>true</code> if the write should proceed, false otherwise
+     */
+    public boolean writing(OpInfo anOp);
+}