Add a new server to the cluster @param server @return true if request is accepted, or false if no leader, rpc fails or leader declines

Append multiple application logs to log store @param values, the application log entries @return true if request is accepted or false if no leader, rp

Apply the log pack to current log store, starting from index @param index, the log index that start applying the logPack, index starts from 1 @param l

This is used to verify the rpc module's functionality @param mode

Upper value for election timeout @return

Heartbeat interval for each peer @return

The batch size for each ReplicateLogRequest message @return

the max gap allowed for log sync, if the gap between the client and leader is less than this value, the ReplicateLogRequest will be stopped @return

The maximum log entries in an appendEntries request @return

Rpc backoff for peers that failed to be connected @return

The block size to sync while syncing snapshots to peers @return

Pack {@code itemsToPack} log items starts from {@code index} @param index @param itemsToPack @return log pack

Remove a server from cluster, the server will step down when the removal is confirmed @param serverId, the id for the server to be removed @return tru

Over writes a log entry at index of {@code index} @param index a value < {@code this.getFirstAvailableIndex()}, and starts from 1 @param logEntry