hydra.timeserver

Class TimeClient

java.lang.Object

java.lang.Thread

hydra.timeserver.TimeClient

All Implemented Interfaces:

java.lang.Runnable

public class TimeClient
extends java.lang.Thread

A thread that fetches the time from the time server on the specified host and port with the given frequency.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
long	networkLatencySum
long	packetCount
java.math.BigInteger	skewSum big integer is required because the sum can be greater than Long.MAX_VALUE and we need full precision

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
TimeClient(java.lang.String host, int port, int frequencyMs, int latencyThresholdMs, int samplesToAverage)

Method Summary

Modifier and Type	Method and Description
void	closeStatistics()
long	getClockSkew()
int	getFrequencyMs()
long	getNetworkLatency()
void	openStatistics()
void	run()
java.lang.String	toString()
void	waitForInitialization() Wait until the clock skew is set to a real value.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, yield

Methods inherited from class java.lang.Object

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

Field Detail

skewSum

public java.math.BigInteger skewSum

big integer is required because the sum can be greater than Long.MAX_VALUE and we need full precision

networkLatencySum

public long networkLatencySum

packetCount

public long packetCount

Constructor Detail

TimeClient

public TimeClient(java.lang.String host,
                  int port,
                  int frequencyMs,
                  int latencyThresholdMs,
                  int samplesToAverage)
           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getFrequencyMs

public int getFrequencyMs()

getClockSkew

public long getClockSkew()

getNetworkLatency

public long getNetworkLatency()

openStatistics

public void openStatistics()

closeStatistics

public void closeStatistics()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Thread

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

waitForInitialization

public void waitForInitialization()
                           throws java.lang.InterruptedException

Wait until the clock skew is set to a real value.

Throws:

java.lang.InterruptedException - if interrupted while waiting