--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/config/TimeBarrierPersistent.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,47 @@
+package org.dancres.blitz.config;
+
+/**
+   <p>Configures Blitz to make operations durable after a certain period of
+   time such that if an operation was submitted more than that time period ago,
+   it is guarenteed to be durable.</p>
+
+   <p>This kind of persistence provides the developer/administrator with the
+   ability to trade persistence guarentee for speed.  Certain applications can
+   tolerate this sort of behaviour because they incorporate their own
+   consistency checks which allow them to recover a certain amount of recent 
+   state that the space hadn't yet persisted.</p>
+ */
+public class TimeBarrierPersistent extends PersistentBase {
+
+    private long theFlushTime;
+
+    /**
+       @param shouldReset specifies whether to reset the ObjectOutputStream
+       used for logging. This is a performance vs memory tradeoff
+
+       @param shouldClean specifies whether old log files and snapshots should
+       be cleaned up or left for archiving.
+
+       @param aMaxLogsBeforeSync is the maximum number of log entries before
+       a checkpoint is forced.
+
+       @param aLogBufferSize especially useful when doing flushing
+       All commands are rendered to the buffer before going to disk in one
+       large block. Without the buffer, each command will trickle to disk as a
+       small update which isn't good for throughput!
+
+       @param aFlushTime the period in millis after which a logged command
+       should be made durable.
+     */
+    public TimeBarrierPersistent(boolean shouldReset, boolean shouldClean,
+                                 int aMaxLogsBeforeSync, int aLogBufferSize,
+                                 long aFlushTime) {
+
+        super(shouldReset, shouldClean, aLogBufferSize, aMaxLogsBeforeSync);
+        theFlushTime = aFlushTime;
+    }
+
+    public long getFlushTime() {
+        return theFlushTime;
+    }
+}