bftsmart.tom.server

Interface SingleExecutable

All Superinterfaces:

Executable

All Known Subinterfaces:

FIFOExecutable

All Known Implementing Classes:

BFTMapServer, DefaultSingleRecoverable, FIFOExecutableRecoverable, LatencyServer, ThroughputLatencyServer

public interface SingleExecutable
extends Executable

Author:

Marcel Santos

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	executeOrdered(byte[] command, MessageContext msgCtx) Method called to execute a request totally ordered.

Methods inherited from interface bftsmart.tom.server.Executable

executeUnordered

Method Detail

executeOrdered

byte[] executeOrdered(byte[] command,
                    MessageContext msgCtx)

Method called to execute a request totally ordered. The message context contains a lot of information about the request, such as timestamp, nonces and sender. The code for this method MUST use the value of timestamp instead of relying on its own local clock, and nonces instead of trying to generated its own random values. This is important because this values are the same for all replicas, and therefore, ensure the determinism required in a replicated state machine.

Parameters:

command - the command issue by the client

msgCtx - information related with the command

Returns:

the reply for the request issued by the client