Container that maintains counts of leases per class and lease type. More...

#include <memfile_lease_limits.h>

Public Types
typedef std::unordered_map< ClientClass, size_t >	ClassCountMap
	Defines ClassCountMap as an unordered map of counts.

Public Member Functions
	ClassLeaseCounter ()=default
	Constructor.

	~ClassLeaseCounter ()=default
	Destructor.

void	addLease (LeasePtr lease)
	Increment the counts for all of a lease's classes by one.

void	adjustClassCount (const ClientClass &client_class, int offset, const Lease::Type &ltype=Lease::TYPE_V4)
	Adjust the count for a given class and lease type by a signed offset.

void	adjustClassCounts (data::ConstElementPtr classes, int offset, const Lease::Type &ltype=Lease::TYPE_V4)
	Adjust the count for a list of classes for a lease type by a signed offset.

void	clear ()
	Remove all entries.

size_t	getClassCount (const ClientClass &client_class, const Lease::Type &ltype=Lease::TYPE_V4) const
	Fetches the lease count for the given class and lease type.

void	removeLease (LeasePtr lease)
	Decrement the counts for all of a lease's classes by one.

void	setClassCount (const ClientClass &client_class, size_t count, const Lease::Type &ltype=Lease::TYPE_V4)
	Sets the lease count for the given class and lease type to a value.

size_t	size (const Lease::Type &ltype=Lease::TYPE_V4) const
	Get the number of entries for a given lease type.

void	updateLease (LeasePtr new_lease, LeasePtr old_lease)
	Adjust class lease counts given a new and old version of a lease.

Static Public Member Functions
static data::ConstElementPtr	getLeaseClientClasses (LeasePtr lease)
	Fetches the list of classes from the lease's user-context.

Detailed Description

Container that maintains counts of leases per class and lease type.

For methods on this class which accept the lease type as a parameter the value is one of the following Lease::TYPE_V4, Lease::TYPE_NA, Lease::TYPE_PD. Kea does not support Lease::TYPE_TA leases and this value is treated as invalid. Note that for simplicity and performance an instance of container is assumed to be used either only for DHCPv4 processing or DHCPv6 processing but not both concurrently.

Definition at line 30 of file memfile_lease_limits.h.

Member Typedef Documentation

◆ ClassCountMap

std::unordered_map<ClientClass, size_t> isc::dhcp::ClassLeaseCounter::ClassCountMap

Defines ClassCountMap as an unordered map of counts.

Definition at line 33 of file memfile_lease_limits.h.

Constructor & Destructor Documentation

◆ ClassLeaseCounter()

isc::dhcp::ClassLeaseCounter::ClassLeaseCounter ( )

default

Constructor.

◆ ~ClassLeaseCounter()

isc::dhcp::ClassLeaseCounter::~ClassLeaseCounter ( )

default

Destructor.

Member Function Documentation

◆ addLease()

void isc::dhcp::ClassLeaseCounter::addLease ( LeasePtr lease )

Increment the counts for all of a lease's classes by one.

Function is intended to be whenever a new lease is being added.

Parameters

lease lease whose classes are to be incremented

Definition at line 93 of file memfile_lease_limits.cc.

References adjustClassCounts(), getLeaseClientClasses(), isc_throw, and isc::dhcp::Lease::STATE_DEFAULT.

Referenced by isc::dhcp::Memfile_LeaseMgr::recountClassLeases4(), and isc::dhcp::Memfile_LeaseMgr::recountClassLeases6().

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◆ adjustClassCount()

void isc::dhcp::ClassLeaseCounter::adjustClassCount	(	const ClientClass &	client_class,
		int	offset,
		const Lease::Type &	ltype = Lease::TYPE_V4 )

Adjust the count for a given class and lease type by a signed offset.

If no entry exists in container for the class and type, a new one is created.

Parameters

client_class	client class to adjust
offset	signed amount to add to the current count
ltype	lease type for which the count is desired, defaults to Lease::TYPE_V4

Definition at line 37 of file memfile_lease_limits.cc.

Referenced by adjustClassCounts().

◆ adjustClassCounts()

void isc::dhcp::ClassLeaseCounter::adjustClassCounts	(	data::ConstElementPtr	classes,
		int	offset,
		const Lease::Type &	ltype = Lease::TYPE_V4 )

Adjust the count for a list of classes for a lease type by a signed offset.

Parameters

classes	list of classes to adjust
offset	signed amount to add the current count
ltype	lease type for which the count is desired, defaults to Lease::TYPE_V4

Definition at line 80 of file memfile_lease_limits.cc.

References adjustClassCount().

Referenced by addLease(), removeLease(), and updateLease().

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◆ clear()

void isc::dhcp::ClassLeaseCounter::clear ( )

inline

Remove all entries.

Definition at line 112 of file memfile_lease_limits.h.

Referenced by isc::dhcp::Memfile_LeaseMgr::clearClassLeaseCounts(), isc::dhcp::Memfile_LeaseMgr::recountClassLeases4(), and isc::dhcp::Memfile_LeaseMgr::recountClassLeases6().

◆ getClassCount()

size_t isc::dhcp::ClassLeaseCounter::getClassCount	(	const ClientClass &	client_class,
		const Lease::Type &	ltype = Lease::TYPE_V4 ) const

Fetches the lease count for the given class and lease type.

Parameters

client_class	class for which the count is desired
ltype	lease type for which the count is desired, defaults to Lease::TYPE_V4

Returns: Number of leases for the class and lease type. If there is no entry found for the class and lease type, a value of zero is returned.

Definition at line 17 of file memfile_lease_limits.cc.

Referenced by isc::dhcp::Memfile_LeaseMgr::getClassLeaseCount().

◆ getLeaseClientClasses()

ConstElementPtr isc::dhcp::ClassLeaseCounter::getLeaseClientClasses ( LeasePtr lease )

static

Fetches the list of classes from the lease's user-context.

Parameters

lease lease from which to fetch classes

Returns: ElementPtr to an Element::List containing the client classes or an empty List.

Definition at line 57 of file memfile_lease_limits.cc.

References isc_throw, isc::data::Element::list, and isc::data::prettyPrint().

Referenced by addLease(), removeLease(), and updateLease().

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◆ removeLease()

void isc::dhcp::ClassLeaseCounter::removeLease ( LeasePtr lease )

Decrement the counts for all of a lease's classes by one.

Function is intended to be whenever an existing lease is being deleted.

Parameters

lease lease whose classes are to be decremented

Definition at line 144 of file memfile_lease_limits.cc.

References adjustClassCounts(), getLeaseClientClasses(), isc_throw, and isc::dhcp::Lease::STATE_DEFAULT.

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◆ setClassCount()

void isc::dhcp::ClassLeaseCounter::setClassCount	(	const ClientClass &	client_class,
		size_t	count,
		const Lease::Type &	ltype = Lease::TYPE_V4 )

Sets the lease count for the given class and lease type to a value.

Parameters

client_class	class for which the count is desired
count	new count value for the class and lease type.
ltype	lease type for which the count is desired, defaults to Lease::TYPE_V4

Definition at line 30 of file memfile_lease_limits.cc.

◆ size()

size_t isc::dhcp::ClassLeaseCounter::size ( const Lease::Type & ltype = Lease::TYPE_V4 ) const

inline

Get the number of entries for a given lease type.

Parameters

ltype type of lease for which the number of entries is desired, defaults to Lease::TYPE_V4

Returns: Number of entries for the lease type

Definition at line 123 of file memfile_lease_limits.h.

References size().

Referenced by size().

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◆ updateLease()

void isc::dhcp::ClassLeaseCounter::updateLease	(	LeasePtr	new_lease,
		LeasePtr	old_lease )

Adjust class lease counts given a new and old version of a lease.

Function is intended to be used whenever an existing lease is being updated. If, upon comparison of the two leases, either the lease states or the class lists are different then:

Decrement the counts for the old class list if the old lease state is Lease::STATE_DEFAULT
Increment the counts for the new class list if the new lease state is Lease::STATE_DEFAULT

Parameters

new_lease	new version of the lease
old_lease	old version of the lease

Definition at line 110 of file memfile_lease_limits.cc.

References adjustClassCounts(), getLeaseClientClasses(), isc_throw, and isc::dhcp::Lease::STATE_DEFAULT.

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

Public Types

Public Member Functions

Static Public Member Functions

Detailed Description

Member Typedef Documentation

◆ ClassCountMap

Constructor & Destructor Documentation

◆ ClassLeaseCounter()

◆ ~ClassLeaseCounter()

Member Function Documentation

◆ addLease()

◆ adjustClassCount()

◆ adjustClassCounts()

◆ clear()

◆ getClassCount()

◆ getLeaseClientClasses()

◆ removeLease()

◆ setClassCount()

◆ size()

◆ updateLease()