co::InstanceCache Class Reference

List of all members.

Classes
struct	Data
	One cache entry. More...
struct	Item
Public Member Functions
CO_API	InstanceCache (const uint64_t maxSize=LB_100MB)
	Construct a new instance cache.
CO_API	~InstanceCache ()
	Destruct this instance cache.
CO_API bool	add (const ObjectVersion &rev, const uint32_t instanceID, Command &command, const uint32_t usage=0)
	Add a new command to the instance cache.
void	remove (const NodeID &node)
	Remove all items from the given node.
CO_API const Data &	operator[] (const UUID &id)
	Direct access to the cached instance data for the given object id.
CO_API bool	release (const UUID &id, const uint32_t count)
	Release the retrieved instance data of the given object.
CO_API bool	erase (const UUID &id)
	Erase all the data for the given object.
uint64_t	getSize () const
uint64_t	getMaxSize () const
void	expire (const int64_t age)
	Remove all items which are older than the given time.
bool	isEmpty ()

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Detailed Description

Definition at line 36 of file instanceCache.h.

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Constructor & Destructor Documentation

CO_API co::InstanceCache::InstanceCache

(

const uint64_t

maxSize = LB_100MB

)

Construct a new instance cache.

CO_API co::InstanceCache::~InstanceCache

(

)

Destruct this instance cache.

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Member Function Documentation

CO_API bool co::InstanceCache::add	(	const ObjectVersion &	rev,
		const uint32_t	instanceID,
		Command &	command,
		const uint32_t	usage = 0
	)

Add a new command to the instance cache.

Parameters:

rev	the object identifier and version.
instanceID	the master instance ID.
command	The command to add.
usage	pre-set usage count.

Returns:

true if the command was entered, false if not.

CO_API bool co::InstanceCache::erase

(

const UUID &

id

)

Erase all the data for the given object.

The data does not have to be accessed, i.e., release has been called for each previous access.

Returns:

true if the element was erased, false otherwise.

void co::InstanceCache::expire

(

const int64_t

age

)

Remove all items which are older than the given time.

uint64_t co::InstanceCache::getMaxSize

(

)

const [inline]

Returns:

the maximum number of bytes used by the instance cache.

Definition at line 110 of file instanceCache.h.

uint64_t co::InstanceCache::getSize

(

)

const [inline]

Returns:

the number of bytes used by the instance cache.

Definition at line 107 of file instanceCache.h.

CO_API const Data& co::InstanceCache::operator[]

(

const UUID &

id

)

Direct access to the cached instance data for the given object id.

The instance data for the given object has to be released by the caller, unless 0 has been returned. Not all returned data stream might be ready.

Parameters:

id	the identifier of the object to look up.

Returns:

the list of cached instance datas, or Data::NONE if no data is cached for this object.

CO_API bool co::InstanceCache::release	(	const UUID &	id,
		const uint32_t	count
	)

Release the retrieved instance data of the given object.

Parameters:

id	the identifier of the object to release.
count	the number of access operations to release

Returns:

true if the element was unpinned, false if it is not in the instance cache.

void co::InstanceCache::remove

(

const NodeID &

node

)

Remove all items from the given node.

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The documentation for this class was generated from the following file:

• instanceCache.h