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com.tangosol.io.journal
Class RamJournalRM.DefaultDependencies

java.lang.Object
com.tangosol.io.journal.AbstractJournalRM.DefaultDependencies
com.tangosol.io.journal.RamJournalRM.DefaultDependencies

All Implemented Interfaces:

AbstractJournalRM.Dependencies, RamJournalRM.Dependencies

Enclosing class:

RamJournalRM

public static class RamJournalRM.DefaultDependencies

extends AbstractJournalRM.DefaultDependencies

implements RamJournalRM.Dependencies

The DefaultDependencies class provides a default implementation of Dependencies.

Field Summary

static double	DFT_COLLECT_PCT Default collection factor (collect files that are 84% or less utilized).
static long	DFT_FILE_SIZE Default size of a "file" i.e. a buffer (2MB).
static long	DFT_POOL_SIZE Default pool size (16MB).
static long	DFT_TOTAL_SIZE Default total size of RAM used (1GB).
static int	DFT_VALUE_SIZE Default maximum value size (16KB).
static long	MAX_FILE_SIZE Maximum size of a "file" i.e. a buffer (2GB).
static long	MAX_POOL_SIZE Maximum pool size (64GB).
static long	MAX_TOTAL_SIZE Maximum total size of RAM used (64GB).
static int	MAX_VALUE_SIZE Maximum value size (4MB).
static long	MIN_FILE_SIZE Minimum maximum size of a "file" i.e. a buffer (1MB).
static long	MIN_TOTAL_SIZE Minimum maximum total size of RAM used (16MB).

Fields inherited from class com.tangosol.io.journal.AbstractJournalRM.DefaultDependencies

m_cbMaxFile, m_cbMaxValue, m_dflLoadFactorGC, MAX_COLLECT_PCT, MAX_FILE_COUNT, MIN_COLLECT_PCT

Constructor Summary

RamJournalRM.DefaultDependencies()
Construct a DefaultDependencies object.

RamJournalRM.DefaultDependencies(RamJournalRM.Dependencies deps)
Construct a DefaultDependencies object.

Method Summary

protected double	getDefaultCollectorLoadFactor() Get the default percentage at which a file is eligible for garbage collection.
protected long	getDefaultMaxFileSize() Get the default maximum file size for this Journal Resource Manager.
protected int	getDefaultMaxValueSize() Get the default maximum value size for this Journal Resource Manager.
long	getMaxPoolSize() Return the maximum size (in bytes) of the buffers that can be held by the pool.
long	getMaxTotalRam() Return the total amount, in bytes, of RAM that will be used for the Journal.
boolean	isNioRam() Return if the journal will use off-heap buffers (NIO RAM) instead of on-heap buffers (byte arrays).
RamJournalRM.DefaultDependencies	setMaxPoolSize(long maxPool) Set the size of the buffers pool.
RamJournalRM.DefaultDependencies	setMaxTotalRam(long maxRam) Set the total amount of RAM that will be used for the journal.
RamJournalRM.DefaultDependencies	setNioRam(boolean fUseNioRam) Set the journal to use direct buffers (NIO RAM) versus on-heap buffers (byte arrays) to store the journal data.
java.lang.String	toString() Return the DefautlDependencies in String format.
RamJournalRM.DefaultDependencies	validate() Validate the supplied dependencies.

Methods inherited from class com.tangosol.io.journal.AbstractJournalRM.DefaultDependencies

getCollectorLoadFactor, getMaxFileSize, getMaxValueSize, setCollectorLoadFactor, setMaxFileSize, setMaxValueSize, validateLoadFactor

Methods inherited from interface com.tangosol.io.journal.AbstractJournalRM.Dependencies

getCollectorLoadFactor, getMaxFileSize, getMaxValueSize

Field Detail

MIN_FILE_SIZE

public static final long MIN_FILE_SIZE

Minimum maximum size of a "file" i.e. a buffer (1MB).

See Also:

Constant Field Values

MAX_FILE_SIZE

public static final long MAX_FILE_SIZE

Maximum size of a "file" i.e. a buffer (2GB).

See Also:

Constant Field Values

DFT_FILE_SIZE

public static final long DFT_FILE_SIZE

Default size of a "file" i.e. a buffer (2MB).

See Also:

Constant Field Values

MIN_TOTAL_SIZE

public static final long MIN_TOTAL_SIZE

Minimum maximum total size of RAM used (16MB).

See Also:

Constant Field Values

MAX_TOTAL_SIZE

public static final long MAX_TOTAL_SIZE

Maximum total size of RAM used (64GB).

See Also:

Constant Field Values

DFT_TOTAL_SIZE

public static final long DFT_TOTAL_SIZE

Default total size of RAM used (1GB).

See Also:

Constant Field Values

MAX_VALUE_SIZE

public static final int MAX_VALUE_SIZE

Maximum value size (4MB).

See Also:

Constant Field Values

DFT_VALUE_SIZE

public static final int DFT_VALUE_SIZE

Default maximum value size (16KB).

See Also:

Constant Field Values

DFT_COLLECT_PCT

public static final double DFT_COLLECT_PCT

Default collection factor (collect files that are 84% or less utilized).

See Also:

Constant Field Values

MAX_POOL_SIZE

public static final long MAX_POOL_SIZE

Maximum pool size (64GB).

See Also:

Constant Field Values

DFT_POOL_SIZE

public static final long DFT_POOL_SIZE

Default pool size (16MB).

See Also:

Constant Field Values

Constructor Detail

RamJournalRM.DefaultDependencies

public RamJournalRM.DefaultDependencies()

Construct a DefaultDependencies object.

RamJournalRM.DefaultDependencies

public RamJournalRM.DefaultDependencies(RamJournalRM.Dependencies deps)

Construct a DefaultDependencies object. Copy the values from the specified Dependencies object.

Parameters:

deps - the dependencies to copy, or null

Method Detail

getMaxTotalRam

public long getMaxTotalRam()

Return the total amount, in bytes, of RAM that will be used for the Journal.

Specified by:

getMaxTotalRam in interface RamJournalRM.Dependencies

Returns:

the maximum number of bytes that will be allocated for Journal storage

setMaxTotalRam

public RamJournalRM.DefaultDependencies setMaxTotalRam(long maxRam)

Set the total amount of RAM that will be used for the journal.

Parameters:

maxRam - the maximum number of bytes that will be allocated for journal storage

Returns:

this object

isNioRam

public boolean isNioRam()

Return if the journal will use off-heap buffers (NIO RAM) instead of on-heap buffers (byte arrays).

Specified by:

isNioRam in interface RamJournalRM.Dependencies

Returns:

true if the journal is configured to use NIO "direct buffer" RAM

setNioRam

public RamJournalRM.DefaultDependencies setNioRam(boolean fUseNioRam)

Set the journal to use direct buffers (NIO RAM) versus on-heap buffers (byte arrays) to store the journal data. The default is that the journal data is kept on heap in byte arrays.

Parameters:

fUseNioRam - pass true to use NIO direct buffers off the heap, or false to use byte arrays on the heap

Returns:

this object

getMaxPoolSize

public long getMaxPoolSize()

Return the maximum size (in bytes) of the buffers that can be held by the pool. This is not a limit of how many buffers can be allocated, since some may be in use at any time, but rather how many will be held by the pool (i.e. recycled) as they are released.

Specified by:

getMaxPoolSize in interface RamJournalRM.Dependencies

Returns:

the maximum size in bytes of all of the buffers that the buffer pool can hold onto

setMaxPoolSize

public RamJournalRM.DefaultDependencies setMaxPoolSize(long maxPool)

Set the size of the buffers pool. The default is defined by DFT_POOL_SIZE, with a maximum defined by MAX_POOL_SIZE and a minimum of zero.

Parameters:

maxPool - the size, in bytes, for the buffer pool

Returns:

this object

validate

public RamJournalRM.DefaultDependencies validate()

Validate the supplied dependencies.

Overrides:

validate in class AbstractJournalRM.DefaultDependencies

Returns:

this object

Throws:

java.lang.IllegalArgumentException - if the dependencies are not valid

getDefaultMaxFileSize

protected long getDefaultMaxFileSize()

Get the default maximum file size for this Journal Resource Manager.

Specified by:

getDefaultMaxFileSize in class AbstractJournalRM.DefaultDependencies

Returns:

the default maximum file size

getDefaultMaxValueSize

protected int getDefaultMaxValueSize()

Get the default maximum value size for this Journal Resource Manager.

Specified by:

getDefaultMaxValueSize in class AbstractJournalRM.DefaultDependencies

Returns:

the default maximum value size

getDefaultCollectorLoadFactor

protected double getDefaultCollectorLoadFactor()

Get the default percentage at which a file is eligible for garbage collection.

Specified by:

getDefaultCollectorLoadFactor in class AbstractJournalRM.DefaultDependencies

Returns:

the default garbage collection load factor

toString

public java.lang.String toString()

Return the DefautlDependencies in String format.

Overrides:

toString in class AbstractJournalRM.DefaultDependencies

Returns:

this object in String format

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