com.tangosol.io

Class AsyncBinaryStore.QueueDaemon

java.lang.Object

com.tangosol.util.Base

com.tangosol.util.Daemon

com.tangosol.io.AsyncBinaryStore.QueueDaemon

All Implemented Interfaces:

Guardable, Runnable

Enclosing class:

AsyncBinaryStore

protected class AsyncBinaryStore.QueueDaemon
extends Daemon

A daemon that processes queued writes.

Nested Class Summary

Nested classes/interfaces inherited from class com.tangosol.util.Daemon

Daemon.DaemonWorker

Nested classes/interfaces inherited from class com.tangosol.util.Base

Base.LoggingWriter, Base.StackFrame

Field Summary

Fields inherited from class com.tangosol.util.Base

LOG_ALWAYS, LOG_DEBUG, LOG_ERR, LOG_INFO, LOG_MAX, LOG_MIN, LOG_QUIET, LOG_WARN, POWER_0, POWER_G, POWER_K, POWER_M, POWER_T, UNIT_D, UNIT_H, UNIT_M, UNIT_MS, UNIT_NS, UNIT_S, UNIT_US

Constructor Summary

Constructors

Constructor and Description
QueueDaemon() Construct a queue daemon to process pending writes.

Method Summary

Modifier and Type	Method and Description
boolean	isDone() Determine if the daemon thread should continue processing or should shut itself down.
protected boolean	isDormant() Determine whether the daemon is dormant or not.
protected void	processPending(Binary binKey, Binary binValue) Store the specified value under the specific key in the underlying store, or if the value is AsyncBinaryStore.DELETED then erase the value from the underlying store.
void	run() This method is invoked on the daemon thread and performs the daemon processing until the thread stops.
void	scheduleWork() Notify the daemon that there is work to be done.
protected void	setDormant(boolean fDormant) Specify whether the daemon is dormant or not.
protected void	takeBreak() Take a short break before plowing into the pending work again.
protected void	takeNap() Take a nap before checking for more pending work.
protected void	takeVacation() Go on an extended vacation until there is any pending work.
void	wakeNow() Force the daemon to wake up immediately.

Methods inherited from class com.tangosol.util.Daemon

changeState, configureWorker, ensureThreadGroup, finishStarting, finishStopping, getConfiguredName, getConfiguredPriority, getContext, getDescription, getGuardRegisterAction, getMaxWaitMillis, getState, getThread, getThreadContextClassLoader, getWorker, guardIfNeeded, heartbeat, heartbeat, instantiateWorker, isGuarded, isOnWorkerThread, isRunning, isStopping, recover, setConfiguredName, setConfiguredPriority, setContext, setGuardPolicy, setGuardRegisterAction, setThreadContextClassLoader, shutdown, start, stop, terminate, toStateString, toString

Methods inherited from class com.tangosol.util.Base

azzert, azzert, azzert, azzertFailed, breakLines, breakLines, capitalize, checkNotEmpty, checkNotNull, checkRange, computeSafeWaitTime, decimalValue, dup, dup, ensureBigDecimal, ensureClassLoader, ensureRuntimeException, ensureRuntimeException, equals, equalsDeep, err, err, err, err, err, escape, formatDateTime, getCallerStackFrame, getCommonMonitor, getCommonMonitor, getCommonMonitor, getContextClassLoader, getContextClassLoader, getDeepMessage, getErr, getLastSafeTimeMillis, getLog, getMaxDecDigits, getMaxHexDigits, getOriginalException, getOut, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mod, mod, octalValue, out, out, out, out, out, pad, parseBandwidth, parseBandwidth, parseDelimitedString, parseHex, parseHex, parseMemorySize, parseMemorySize, parsePercentage, parseTime, parseTime, parseTimeNanos, parseTimeNanos, printStackTrace, randomize, randomize, randomize, read, read, read, read, read, read, read, replace, setErr, setLog, setLogEcho, setOut, sleep, toBandwidthString, toBandwidthString, toCharEscape, toCrc, toCrc, toCrc, toCrc, toCrc, toDecString, toDelimitedString, toDelimitedString, toDelimitedString, toDelimitedString, toHex, toHex, toHexDump, toHexEscape, toHexEscape, toHexEscape, toHexEscape, toHexString, toMemorySizeString, toMemorySizeString, toQuotedCharEscape, toQuotedStringEscape, toSqlString, toString, toString, toStringEscape, toUnicodeEscape, trace, trace, trace, trace, trace, trace, trace, trace, trace, truncateString, truncateString, wait

Methods inherited from class java.lang.Object

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

Constructor Detail

QueueDaemon

public QueueDaemon()

Construct a queue daemon to process pending writes.

Method Detail

scheduleWork

public void scheduleWork()

Notify the daemon that there is work to be done.

wakeNow

public void wakeNow()

Force the daemon to wake up immediately.

isDone

public boolean isDone()

Determine if the daemon thread should continue processing or should shut itself down. The daemon thread will continue processing as long as there is an underlying BinaryStore to write pending items to and the write-behind mode has not explicitly been disabled.

Returns:

true if the daemon should shut itself down

run

public void run()

This method is invoked on the daemon thread and performs the daemon processing until the thread stops.

Specified by:

run in interface Runnable

Specified by:

run in class Daemon

processPending

protected void processPending(Binary binKey,
                              Binary binValue)

Store the specified value under the specific key in the underlying store, or if the value is AsyncBinaryStore.DELETED then erase the value from the underlying store.

Parameters:

binKey - key to store the value under

binValue - value to be stored

takeBreak

protected void takeBreak()

Take a short break before plowing into the pending work again. This mode is used when there is already more work to do.

takeNap

protected void takeNap()

Take a nap before checking for more pending work. This mode is purposefully relaxed to let some work queue up before trying to process it.

takeVacation

protected void takeVacation()

Go on an extended vacation until there is any pending work. This is called a "dormant" mode in which this thread will go to sleep indefinitely and require another thread to wake it up should any work need to be done.

isDormant

protected boolean isDormant()

Determine whether the daemon is dormant or not.

Returns:

true if the daemon is dormant, which means that the daemon must be woken up in order to do any work

setDormant

protected void setDormant(boolean fDormant)

Specify whether the daemon is dormant or not.

Parameters:

fDormant - pass true if the daemon is going dormant, or false if the daemon is waking up from a dormant state