X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2FReplicatedLog.java;h=82d0839bee772bd8efba88a8d1392ab1d336ff1c;hb=2a89ae48921724ef5a4ab42dcff6afc74c5b0a4a;hp=29d6a4557db8dde765accbfe767b9b4f8debd290;hpb=3019650e87a3fc05f80e8f6359e01ca5f1c5f197;p=controller.git

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/ReplicatedLog.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/ReplicatedLog.java
index 29d6a4557d..82d0839bee 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/ReplicatedLog.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/ReplicatedLog.java
@@ -44,7 +44,10 @@ public interface ReplicatedLog {
     long lastTerm();
 
     /**
-     * Remove all the entries from the logs >= index
+     * To be called when we need to remove entries from the in-memory log.
+     * This method will remove all entries >= index. This method should be used
+     * during recovery to appropriately trim the log based on persisted
+     * information
      *
      * @param index the index of the log entry
      */
@@ -52,10 +55,14 @@ public interface ReplicatedLog {
 
 
     /**
-     * Remove all entries starting from the specified entry and persist the
-     * information to disk
+     * To be called when we need to remove entries from the in-memory log and we
+     * need that information persisted to disk. This method will remove all
+     * entries >= index.
+     * <p>
+     * The persisted information would then be used during recovery to properly
+     * reconstruct the state of the in-memory replicated log
      *
-     * @param index
+     * @param index the index of the log entry
      */
     void removeFromAndPersist(long index);
 
@@ -65,6 +72,13 @@ public interface ReplicatedLog {
      */
     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
@@ -77,6 +91,11 @@ public interface ReplicatedLog {
      */
     List<ReplicatedLogEntry> getFrom(long index);
 
+    /**
+     *
+     * @param index the index of the log entry
+     */
+    List<ReplicatedLogEntry> getFrom(long index, int max);
 
     /**
      *
@@ -101,13 +120,6 @@ public interface ReplicatedLog {
      */
     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
      *
@@ -122,4 +134,47 @@ public interface ReplicatedLog {
      * 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();
+
 }