*/
void append(ReplicatedLogEntry replicatedLogEntry);
+ /**
+ * Optimization method to increase the capacity of the journal log prior to appending entries.
+ *
+ * @param amount the amount to increase by
+ */
+ void increaseJournalLogCapacity(int amount);
+
/**
*
* @param replicatedLogEntry
*/
List<ReplicatedLogEntry> getFrom(long index);
+ /**
+ *
+ * @param index the index of the log entry
+ */
+ List<ReplicatedLogEntry> getFrom(long index, int max);
/**
*
*/
boolean isInSnapshot(long index);
- /**
- * Get the snapshot
- *
- * @return an object representing the snapshot if it exists. null otherwise
- */
- Object getSnapshot();
-
/**
* Get the index of the snapshot
*
* otherwise
*/
long getSnapshotTerm();
+
+ /**
+ * sets the snapshot index in the replicated log
+ * @param snapshotIndex
+ */
+ void setSnapshotIndex(long snapshotIndex);
+
+ /**
+ * sets snapshot term
+ * @param snapshotTerm
+ */
+ void setSnapshotTerm(long snapshotTerm);
+
+ /**
+ * Clears the journal entries with startIndex(inclusive) and endIndex (exclusive)
+ * @param startIndex
+ * @param endIndex
+ */
+ void clear(int startIndex, int endIndex);
+
+ /**
+ * Handles all the bookkeeping in order to perform a rollback in the
+ * event of SaveSnapshotFailure
+ * @param snapshotCapturedIndex
+ * @param snapshotCapturedTerm
+ */
+ void snapshotPreCommit(long snapshotCapturedIndex, long snapshotCapturedTerm);
+
+ /**
+ * Sets the Replicated log to state after snapshot success.
+ */
+ void snapshotCommit();
+
+ /**
+ * Restores the replicated log to a state in the event of a save snapshot failure
+ */
+ void snapshotRollback();
+
+ /**
+ * Size of the data in the log (in bytes)
+ */
+ int dataSize();
+
}