bftsmart.demo.counter

Class CounterState

java.lang.Object

bftsmart.demo.counter.CounterState

All Implemented Interfaces:

ApplicationState, java.io.Serializable

public class CounterState
extends java.lang.Object
implements ApplicationState

Author:

Joao Sousa

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CounterState() Constructs a TansferableState This constructor should be used when there isn't a valid state to construct the object with
CounterState(int lastEid, byte[] state, byte[] stateHash) Constructs a TansferableState This constructor should be used when there is a valid state to construct the object with

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) This method MUST be implemented.
int	getLastEid() The consensus of the last batch of commands which the application was given
byte[]	getSerializedState() Byte array that must be a representation of the application state
byte[]	getStateHash() Gets an secure hash of the application state
int	hashCode() This method MUST be implemented.
boolean	hasState() Indicates if the sender replica had the state requested by the recovering replica
void	setSerializedState(byte[] state) Sets a byte array that must be a representation of the application state

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CounterState

public CounterState(int lastEid,
            byte[] state,
            byte[] stateHash)

Constructs a TansferableState This constructor should be used when there is a valid state to construct the object with

Parameters:

messageBatches - Batches received since the last checkpoint.

state - State associated with the last checkpoint

stateHash - Hash of the state associated with the last checkpoint

CounterState

public CounterState()

Constructs a TansferableState This constructor should be used when there isn't a valid state to construct the object with

Method Detail

getLastEid

public int getLastEid()

Description copied from interface: ApplicationState

The consensus of the last batch of commands which the application was given

Specified by:

getLastEid in interface ApplicationState

Returns:

consensus of the last batch of commands which the application was given

hasState

public boolean hasState()

Description copied from interface: ApplicationState

Indicates if the sender replica had the state requested by the recovering replica

Specified by:

hasState in interface ApplicationState

Returns:

true if the sender replica had the state requested by the recovering replica, false otherwise

setSerializedState

public void setSerializedState(byte[] state)

Description copied from interface: ApplicationState

Sets a byte array that must be a representation of the application state

Specified by:

setSerializedState in interface ApplicationState

Parameters:

state - a byte array that must be a representation of the application state

getSerializedState

public byte[] getSerializedState()

Description copied from interface: ApplicationState

Byte array that must be a representation of the application state

Specified by:

getSerializedState in interface ApplicationState

getStateHash

public byte[] getStateHash()

Description copied from interface: ApplicationState

Gets an secure hash of the application state

Specified by:

getStateHash in interface ApplicationState

Returns:

Secure hash of the application state

equals

public boolean equals(java.lang.Object obj)

Description copied from interface: ApplicationState

This method MUST be implemented. However, the attribute returned by getSerializedState() should be ignored, and getStateHash() should be used instead

Specified by:

equals in interface ApplicationState

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Description copied from interface: ApplicationState

This method MUST be implemented. However, the attribute returned by getSerializedState() should be ignored, and getStateHash() should be used instead

Specified by:

hashCode in interface ApplicationState

Overrides:

hashCode in class java.lang.Object