Package com.tangosol.io.journal

Class AbstractJournalRM.CollectorDaemon

java.lang.Object

com.tangosol.util.Base

com.tangosol.util.Daemon

com.tangosol.io.journal.AbstractJournalRM.CollectorDaemon

All Implemented Interfaces:

Guardable, Runnable

Enclosing class:

AbstractJournalRM

protected class AbstractJournalRM.CollectorDaemon
extends Daemon

The CollectorDaemon evaluates the JournalFile objects to see which ones should be evacuated, it evacuates those that should be, and it deletes those that have been successfully evacuated.

This daemon is not intended to be guarded.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	AbstractJournalRM.CollectorDaemon.CollectionCoordinator	A CollectionCoordinator is responsible for shaping an evacuation as well as managing any reserved files created to ensure the journal continues to operate.
protected class	AbstractJournalRM.CollectorDaemon.InvokeGCJournalFile	A AbstractJournalRM.JournalFile implementation returned when the journal has consumed all known capacity.

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

Daemon.DaemonWorker

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

Base.LoggingWriter

Field Summary

Fields inherited from class com.tangosol.util.Base

DEFAULT_LOAD_FACTOR, 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
CollectorDaemon()	Construct a CollectorDaemon.

Method Summary

Modifier and Type	Method	Description
protected void	dedupe()	Give the in-memory radix key stores a chance to de-dupe their byte[] values, similar to the concept behind String's intern() method.
protected AbstractJournalRM.CollectorDaemon.CollectionCoordinator	getCoordinator()	Return a AbstractJournalRM.CollectorDaemon.CollectionCoordinator.
protected String	getDescription()	Format the Daemon attributes into a String for inclusion in the String returned from the Daemon.toString() method.
protected int	getReservedFileId()	Return the currently reserved file id.
protected Daemon.DaemonWorker	instantiateWorker()	Instantiate a DaemonWorker that will be used as a daemon.
void	notifyReleased(int cbReleased, int nFileId)	Notifies the collector that a AbstractJournalRM.JournalFile has had some memory released.
void	run()	The daemon's implementation method.
protected void	setGuardPolicy(Guardian guardian, long cTimeoutMillis, float flPctRecover)	Set the Guardian and policy to guard this Daemon with.
protected Iterator<AbstractJournalRM.JournalFile>	sortedIterator()	Returns a sorted Iterator based on the amount of released memory in each AbstractJournalRM.JournalFile.
void	stop()	Request the daemon to stop.

Methods inherited from class com.tangosol.util.Daemon

changeState, configureWorker, ensureThreadGroup, finishStarting, finishStopping, getConfiguredName, getConfiguredPriority, getContext, getGuardRegisterAction, getMaxWaitMillis, getState, getThread, getThreadContextClassLoader, getWorker, guardIfNeeded, heartbeat, heartbeat, isGuarded, isOnWorkerThread, isRunning, isStopping, recover, setConfiguredName, setConfiguredPriority, setContext, setGuardRegisterAction, setThreadContextClassLoader, shutdown, start, 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, 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, newHashMap, newHashMap, newHashSet, newHashSet, 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, wait, wait, wait

Constructor Details

CollectorDaemon

public CollectorDaemon()

Construct a CollectorDaemon.

Method Details

instantiateWorker

protected Daemon.DaemonWorker instantiateWorker()

Instantiate a DaemonWorker that will be used as a daemon.

Overrides:

instantiateWorker in class Daemon

Returns:

a new instance of DaemonWorker or a sub-class thereof

stop

public void stop()

Request the daemon to stop. This method will only have an effect if the daemon sub-class respects the value returned from Daemon.isStopping().

Overrides:

stop in class Daemon

run

public void run()

The daemon's implementation method. Override this method to implement a daemon.

An example implementation is:

   while (!isStopping())
       {
       // do some processing
       // ...

       synchronized (this)
           {
           // wait for notification of more work
           wait();
           }
       }
 

Specified by:

run in interface Runnable

Specified by:

run in class Daemon

setGuardPolicy

protected void setGuardPolicy(Guardian guardian,
 long cTimeoutMillis,
 float flPctRecover)

Set the Guardian and policy to guard this Daemon with. The Daemon is registered with the specified Guardian each time the Daemon is started, and is released each time the Daemon is stopped.

Overrides:

setGuardPolicy in class Daemon

Parameters:

guardian - the Guardian that will be guarding this Daemon

cTimeoutMillis - the timeout in ms for this Daemon, or 0 for the service guardian timeout

flPctRecover - the recovery percentage for this Daemon

sortedIterator

protected Iterator<AbstractJournalRM.JournalFile> sortedIterator()

Returns a sorted Iterator based on the amount of released memory in each AbstractJournalRM.JournalFile.

Returns:

a sorted iterator ascending based on released memory

getDescription

protected String getDescription()

Format the Daemon attributes into a String for inclusion in the String returned from the Daemon.toString() method.

Overrides:

getDescription in class Daemon

Returns:

a String listing the attributes of the Daemon

dedupe

protected void dedupe()

Give the in-memory radix key stores a chance to de-dupe their byte[] values, similar to the concept behind String's intern() method.

notifyReleased

public void notifyReleased(int cbReleased,
 int nFileId)

Notifies the collector that a AbstractJournalRM.JournalFile has had some memory released.

Parameters:

cbReleased - the number of bytes released

nFileId - the AbstractJournalRM.JournalFile's file id

getReservedFileId

protected int getReservedFileId()

Return the currently reserved file id.

Returns:

the currently reserved file id

getCoordinator

protected AbstractJournalRM.CollectorDaemon.CollectionCoordinator getCoordinator()

Return a AbstractJournalRM.CollectorDaemon.CollectionCoordinator.

Returns:

a CollectionCoordinator