com.threerings.presents.client

Class DeltaCalculator

java.lang.Object

com.threerings.presents.client.DeltaCalculator

public class DeltaCalculator
extends Object

Used to compute the client/server time delta, attempting to account for the network delay experienced when the server sends its current time to the client.

Constructor Summary

Constructors

Constructor and Description
DeltaCalculator() Constructs a delta calculator which is used to calculate the time delta between the client and server, accounting reasonably well for the delay introduced by sending a timestamp over the network from the server to the client.

Method Summary

Modifier and Type	Method and Description
long	getTimeDelta() Returns the best estimate client/server time-delta.
boolean	gotPong(PongResponse pong) Must be called when the pong response arrives back from the server.
boolean	isDone() Returns true if this calculator has enough data to compute a time delta estimate.
void	sentPing(PingRequest ping) Must be called when a ping message is sent to the server.
boolean	shouldSendPing() Should we send another ping?

Methods inherited from class java.lang.Object

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

Constructor Detail

DeltaCalculator

public DeltaCalculator()

Constructs a delta calculator which is used to calculate the time delta between the client and server, accounting reasonably well for the delay introduced by sending a timestamp over the network from the server to the client.

Method Detail

shouldSendPing

public boolean shouldSendPing()

Should we send another ping?

sentPing

public void sentPing(PingRequest ping)

Must be called when a ping message is sent to the server.

gotPong

public boolean gotPong(PongResponse pong)

Must be called when the pong response arrives back from the server.

Returns:

true if we've iterated sufficiently many times to establish a stable time delta estimate.

getTimeDelta

public long getTimeDelta()

Returns the best estimate client/server time-delta.

isDone

public boolean isDone()

Returns true if this calculator has enough data to compute a time delta estimate. Stick a fork in it!