Package bftsmart.demo.counter

Class CounterServer

java.lang.Object

bftsmart.tom.server.defaultservices.DefaultSingleRecoverable

bftsmart.demo.counter.CounterServer

All Implemented Interfaces:

Executable, Recoverable, SingleExecutable

public final class CounterServer
extends DefaultSingleRecoverable

Example replica that implements a BFT replicated service (a counter). If the increment > 0 the counter is incremented, otherwise, the counter value is read.

Field Summary

Fields inherited from class bftsmart.tom.server.defaultservices.DefaultSingleRecoverable

replicaContext

Constructor Summary

Constructors

Constructor	Description
CounterServer(int id)

Method Summary

Modifier and Type	Method	Description
byte[]	appExecuteOrdered(byte[] command, MessageContext msgCtx)	Execute a batch of ordered requests
byte[]	appExecuteUnordered(byte[] command, MessageContext msgCtx)	Execute an unordered request
byte[]	getSnapshot()	Returns a serialized snapshot of the application state
void	installSnapshot(byte[] state)	Given a snapshot received from the state transfer protocol, install it
static void	main(java.lang.String[] args)

Methods inherited from class bftsmart.tom.server.defaultservices.DefaultSingleRecoverable

executeOrdered, executeUnordered, getState, getStateManager, noOp, Op, setClientsManager, setReplicaContext, setState

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface bftsmart.tom.server.Executable

executeUnordered, getTOMMessage

Methods inherited from interface bftsmart.tom.server.SingleExecutable

executeOrdered

Constructor Detail

CounterServer

public CounterServer(int id)

Method Detail

appExecuteUnordered

public byte[] appExecuteUnordered(byte[] command,
                                  MessageContext msgCtx)

Description copied from class: DefaultSingleRecoverable

Execute an unordered request

Specified by:

appExecuteUnordered in class DefaultSingleRecoverable

Parameters:

command - The unordered request

msgCtx - The context associated to the request

Returns:

the reply for the request issued by the client

appExecuteOrdered

public byte[] appExecuteOrdered(byte[] command,
                                MessageContext msgCtx)

Description copied from class: DefaultSingleRecoverable

Execute a batch of ordered requests

Specified by:

appExecuteOrdered in class DefaultSingleRecoverable

Parameters:

command - The ordered request

msgCtx - The context associated to each request

Returns:

the reply for the request issued by the client

main

public static void main(java.lang.String[] args)

installSnapshot

public void installSnapshot(byte[] state)

Description copied from class: DefaultSingleRecoverable

Given a snapshot received from the state transfer protocol, install it

Specified by:

installSnapshot in class DefaultSingleRecoverable

Parameters:

state - The serialized snapshot

getSnapshot

public byte[] getSnapshot()

Description copied from class: DefaultSingleRecoverable

Returns a serialized snapshot of the application state

Specified by:

getSnapshot in class DefaultSingleRecoverable

Returns:

A serialized snapshot of the application state