org.axonframework.eventhandling

Class ReplayToken

java.lang.Object

org.axonframework.eventhandling.ReplayToken

All Implemented Interfaces:

WrappedToken, TrackingToken

public class ReplayToken
extends Object
implements TrackingToken, WrappedToken

Token keeping track of the position before a reset was triggered. This allows for downstream components to detect messages that are redelivered ass part of a replay.

Since:

3.2

Author:

Allard Buijze

Constructor Summary

Constructors

Modifier	Constructor and Description
	ReplayToken(TrackingToken tokenAtReset) Initialize a ReplayToken, using the given tokenAtReset to represent the position at which a reset was triggered.
protected	ReplayToken(TrackingToken tokenAtReset, TrackingToken newRedeliveryToken)

Method Summary

Modifier and Type	Method and Description
TrackingToken	advancedTo(TrackingToken newToken)
boolean	covers(TrackingToken other) Indicates whether this token covers the other token completely.
boolean	equals(Object o)
int	hashCode()
static boolean	isReplay(Message<?> message)
static boolean	isReplay(TrackingToken trackingToken)
TrackingToken	lowerBound(TrackingToken other) Returns a token that represents the lower bound between this and the other token.
String	toString()
TrackingToken	unwrap() Returns the token representing the current position in the stream.
TrackingToken	upperBound(TrackingToken other) Returns the token that represents the furthest possible position in a stream that either this token or the given other represents.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ReplayToken

public ReplayToken(TrackingToken tokenAtReset)

Initialize a ReplayToken, using the given tokenAtReset to represent the position at which a reset was triggered. The current token is reset to the initial position.

Parameters:

tokenAtReset - The token representing the position at which the reset was triggered.

ReplayToken

protected ReplayToken(TrackingToken tokenAtReset,
                      TrackingToken newRedeliveryToken)

Method Detail

isReplay

public static boolean isReplay(Message<?> message)

isReplay

public static boolean isReplay(TrackingToken trackingToken)

advancedTo

public TrackingToken advancedTo(TrackingToken newToken)

lowerBound

public TrackingToken lowerBound(TrackingToken other)

Description copied from interface: TrackingToken

Returns a token that represents the lower bound between this and the other token. Effectively, the returned token will cause messages not received by both this and the other token to be redelivered.

Specified by:

lowerBound in interface TrackingToken

Parameters:

other - The token to compare to this one

Returns:

The token representing the lower bound of the two

upperBound

public TrackingToken upperBound(TrackingToken other)

Description copied from interface: TrackingToken

Returns the token that represents the furthest possible position in a stream that either this token or the given other represents. Effectively, this means this token will only deliver messages that neither this, nor the other have been received.

Specified by:

upperBound in interface TrackingToken

Parameters:

other - The token to compare this token to

Returns:

a token that represents the furthest position of this or the other stream

covers

public boolean covers(TrackingToken other)

Description copied from interface: TrackingToken

Indicates whether this token covers the other token completely. That means that this token represents a position in a stream that has received all of the messages that a stream represented by the other token has received.

Specified by:

covers in interface TrackingToken

Parameters:

other - The token to compare to this one

Returns:

true if this token covers the other, otherwise false

unwrap

public TrackingToken unwrap()

Description copied from interface: WrappedToken

Returns the token representing the current position in the stream.

Specified by:

unwrap in interface WrappedToken

Returns:

the token representing the current position in the stream

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object