Package com.tangosol.net

Class LoadBalancer.Queue

java.lang.Object

com.tangosol.util.Base

com.tangosol.net.LoadBalancer.Queue

Enclosing class:

LoadBalancer

public static class LoadBalancer.Queue
extends Base

A Queue is used to effeciently queue up items for daemon threads to work on.

Nested Class Summary

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

Base.LoggingWriter

Field Summary

Fields

Modifier and Type	Field	Description
protected List	m_list	A list of items that have been queued.

Fields inherited from class com.tangosol.util.Base

LOG_ALWAYS, LOG_CONFIG, 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	Description
Queue()	Construct a queue.

Method Summary

Modifier and Type	Method	Description
void	add(Object o)	Add an object to the end of the queue.
boolean	isEmpty()	Determine if the queue is empty.
Object	remove()	Wait for and remove an item from the from of the queue.
Object	removeNoWait()	Remove an item from the queue if the queue is not empty.
int	size()	Determine the number of items in the queue.

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, getProcessRandom, getRandom, getRandomBinary, getRandomBinary, getRandomString, getSafeTimeMillis, getStackFrame, getStackFrames, getStackTrace, getStackTrace, getStackTrace, getThreadFactory, getTimeZone, getUpTimeMillis, hashCode, hexValue, indentString, indentString, isDecimal, isHex, isLogEcho, isOctal, log, log, log, log, log, makeInteger, makeLong, makeThread, mergeArray, mergeBooleanArray, mergeByteArray, mergeCharArray, mergeDoubleArray, mergeFloatArray, mergeIntArray, mergeLongArray, 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, 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, toString, wait, wait, wait

Field Details

m_list

protected List m_list

A list of items that have been queued.

Constructor Details

Queue

public Queue()

Construct a queue.

Method Details

size

public int size()

Determine the number of items in the queue.

Returns:

the number of items in the queue

isEmpty

public boolean isEmpty()

Determine if the queue is empty.

Returns:

true if the queue currently has no items in it

add

public void add(Object o)

Add an object to the end of the queue.

Parameters:

o - the item to add to the end of the queue

remove

public Object remove()
              throws InterruptedException

Wait for and remove an item from the from of the queue.

Returns:

an item from the queue

Throws:

InterruptedException - if the thread is interrupted while waiting for something to be added to the queue

removeNoWait

public Object removeNoWait()

Remove an item from the queue if the queue is not empty.

Returns:

an item if the queue is not empty, otherwise null