isc::dhcp::LeaseMgrFactory Class Reference

Lease Manager Factory. More...

#include <lease_mgr_factory.h>

Public Types
typedef std::function< std::string()>	DBVersion
	Type of lease mgr version.
typedef std::function< TrackingLeaseMgrPtr(const db::DatabaseConnection::ParameterMap &)	Factory)
	Type of lease mgr factory.

Public Member Functions
	~LeaseMgrFactory ()

Static Public Member Functions
static void	create (const std::string &dbaccess)
	Create an instance of a lease manager.
static bool	deregisterFactory (const std::string &db_type, bool no_log=false)
	Deregister a lease mgr factory.
static void	destroy ()
	Destroy lease manager.
static std::list< std::string >	getDBVersions ()
	Return extended version info for registered backends.
static bool	haveInstance ()
	Indicates if the lease manager has been instantiated.
static TrackingLeaseMgr &	instance ()
	Return current lease manager.
static void	logRegistered ()
	Logs out all registered backends.
static void	recreate (const std::string &dbaccess, bool preserve_callbacks=true)
	Recreate an instance of a lease manager with optionally preserving registered callbacks.
static bool	registeredFactory (const std::string &db_type)
	Check if a lease mgr factory was registered.
static bool	registerFactory (const std::string &db_type, const Factory &factory, bool no_log=false, DBVersion db_version=DBVersion())
	Register a lease mgr factory.

Detailed Description

Lease Manager Factory.

This class comprises nothing but static methods used to create a lease manager. It analyzes the database information passed to the creation function and instantiates an appropriate lease manager based on the type requested.

Strictly speaking these functions could be stand-alone functions. However, it is convenient to encapsulate them in a class for naming purposes.

Todo

: Will need to develop some form of registration mechanism for user-supplied backends (so that there is no need to modify the code).

Definition at line 43 of file lease_mgr_factory.h.

Member Typedef Documentation

DBVersion

typedef std::function<std::string ()> isc::dhcp::LeaseMgrFactory::DBVersion

Type of lease mgr version.

Definition at line 116 of file lease_mgr_factory.h.

Factory

typedef std::function<TrackingLeaseMgrPtr (const db::DatabaseConnection::ParameterMap&) isc::dhcp::LeaseMgrFactory::Factory)

Type of lease mgr factory.

A factory takes a parameter map and returns a pointer to a lease mgr. In case of failure it must throw and not return null.

Definition at line 113 of file lease_mgr_factory.h.

Constructor & Destructor Documentation

~LeaseMgrFactory()

isc::dhcp::LeaseMgrFactory::~LeaseMgrFactory ( )

inline

Definition at line 45 of file lease_mgr_factory.h.

References destroy().

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Member Function Documentation

create()

void isc::dhcp::LeaseMgrFactory::create ( const std::string & dbaccess )

static

Create an instance of a lease manager.

Each database backend has its own lease manager type. This static method sets the "current" lease manager to be a manager of the appropriate type. The actual lease manager is returned by the "instance" method.

Note

When called, the current lease manager is always destroyed and a new one created - even if the parameters are the same.

dbaccess is a generic way of passing parameters. Parameters are passed in the "name=value" format, separated by spaces. The data MUST include a keyword/value pair of the form "type=dbtype" giving the database type, e.q. "mysql" or "sqlite3".

Parameters

dbaccess

Database access parameters. These are in the form of "keyword=value" pairs, separated by spaces. They are backend- -end specific, although must include the "type" keyword which gives the backend in use.

Exceptions

isc::InvalidParameter	dbaccess string does not contain the "type" keyword.
isc::dhcp::InvalidType	The "type" keyword in dbaccess does not identify a supported backend.

Definition at line 43 of file lease_mgr_factory.cc.

References isc::dhcp::dhcpsrv_logger, isc::dhcp::DHCPSRV_NOTYPE_DB, isc::dhcp::DHCPSRV_UNKNOWN_DB, isc_throw, LOG_ERROR, isc::db::DatabaseConnection::parse(), and isc::db::DatabaseConnection::redactedAccessString().

Referenced by recreate().

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deregisterFactory()

bool isc::dhcp::LeaseMgrFactory::deregisterFactory ( const std::string & db_type, bool no_log = false )

static

Deregister a lease mgr factory.

Disassociate the factory to a database type in the map. The no_log is to avoid logging during global object deinitialization.

Parameters

db_type	database type
no_log	do not log (default false)

Returns

true if the factory was successfully removed from the map, false if it was not found.

Definition at line 163 of file lease_mgr_factory.cc.

References isc::dhcp::DHCPSRV_DBG_TRACE, isc::dhcp::DHCPSRV_LEASE_MGR_BACKEND_DEREGISTER, isc::dhcp::dhcpsrv_logger, and LOG_DEBUG.

Referenced by isc::dhcp::MemfileLeaseMgrInit::~MemfileLeaseMgrInit().

destroy()

void isc::dhcp::LeaseMgrFactory::destroy ( )

static

Destroy lease manager.

Destroys the current lease manager object. This should have the effect of closing the database connection. The method is a no-op if no lease manager is available.

Definition at line 89 of file lease_mgr_factory.cc.

References isc::dhcp::DHCPSRV_CLOSE_DB, isc::dhcp::DHCPSRV_DBG_TRACE, isc::dhcp::dhcpsrv_logger, and LOG_DEBUG.

Referenced by isc::dhcp::ControlledDhcpv4Srv::~ControlledDhcpv4Srv(), isc::dhcp::ControlledDhcpv6Srv::~ControlledDhcpv6Srv(), isc::dhcp::Dhcpv4Srv::~Dhcpv4Srv(), isc::dhcp::Dhcpv6Srv::~Dhcpv6Srv(), ~LeaseMgrFactory(), isc::dhcp::ControlledDhcpv4Srv::processConfig(), isc::dhcp::ControlledDhcpv6Srv::processConfig(), and recreate().

getDBVersions()

std::list< std::string > isc::dhcp::LeaseMgrFactory::getDBVersions ( )

static

Return extended version info for registered backends.

Definition at line 200 of file lease_mgr_factory.cc.

References version().

Referenced by isc::dhcp::Dhcpv4Srv::getVersion(), and isc::dhcp::Dhcpv6Srv::getVersion().

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haveInstance()

bool isc::dhcp::LeaseMgrFactory::haveInstance ( )

static

Indicates if the lease manager has been instantiated.

Returns

True if the lease manager instance exists, false otherwise.

Definition at line 119 of file lease_mgr_factory.cc.

Referenced by isc::dhcp::Allocator::~Allocator(), recreate(), and isc::dhcp::SrvConfig::updateStatistics().

instance()

TrackingLeaseMgr & isc::dhcp::LeaseMgrFactory::instance ( )

static

Return current lease manager.

Returns an instance of the "current" lease manager. An exception will be thrown if none is available.

Exceptions

isc::dhcp::NoLeaseManager

No lease manager is available: use create() to create one before calling this method.

Definition at line 124 of file lease_mgr_factory.cc.

References isc_throw.

Referenced by isc::dhcp::Allocator::~Allocator(), isc::lease_cmds::LeaseCmdsImpl::addOrUpdate4(), isc::lease_cmds::LeaseCmdsImpl::addOrUpdate6(), isc::dhcp::AllocEngine::allocateLeases6(), isc::dhcp::Dhcpv4Srv::assignLease(), isc::dhcp::Dhcpv6Srv::checkDynamicSubnetChange(), isc::dhcp::Dhcpv6Srv::declineIA(), isc::dhcp::Dhcpv4Srv::declineLease(), isc::dhcp::Dhcpv6Srv::declineLease(), isc::dhcp::AllocEngine::deleteExpiredReclaimedLeases4(), isc::dhcp::AllocEngine::deleteExpiredReclaimedLeases6(), isc::lease_cmds::LeaseCmdsImpl::getIPv6LeaseForDelete(), isc::lease_cmds::LeaseCmdsImpl::lease4DelHandler(), isc::lease_cmds::LeaseCmdsImpl::lease4ResendDdnsHandler(), isc::lease_cmds::LeaseCmdsImpl::lease4WipeHandler(), isc::lease_cmds::LeaseCmdsImpl::lease6BulkApplyHandler(), isc::lease_cmds::LeaseCmdsImpl::lease6DelHandler(), isc::lease_cmds::LeaseCmdsImpl::lease6ResendDdnsHandler(), isc::lease_cmds::LeaseCmdsImpl::lease6WipeHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseAddHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetAllHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetByClientIdHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetByDuidHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetByHostnameHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetByHwAddressHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseGetPageHandler(), isc::lease_cmds::LeaseCmdsImpl::leaseWriteHandler(), isc::stat_cmds::LeaseStatCmdsImpl::makeResultSet4(), isc::stat_cmds::LeaseStatCmdsImpl::makeResultSet6(), isc::dhcp::Dhcpv4Srv::postAllocateNameUpdate(), isc::dhcp::Dhcpv4Srv::processDecline(), isc::dhcp::Dhcpv4Srv::processRelease(), isc::dhcp::AllocEngine::reclaimExpiredLeases4Internal(), isc::dhcp::AllocEngine::reclaimExpiredLeases6Internal(), isc::dhcp::Dhcpv4Srv::recoverStashedAgentOption(), recreate(), isc::dhcp::Dhcpv6Srv::releaseIA_NA(), isc::dhcp::Dhcpv6Srv::releaseIA_PD(), isc::dhcp::AllocEngine::renewLeases6(), isc::dhcp::Dhcpv4Srv::serverDecline(), isc::dhcp::CfgSubnets4::updateStatistics(), and isc::dhcp::CfgSubnets6::updateStatistics().

logRegistered()

void isc::dhcp::LeaseMgrFactory::logRegistered ( )

static

Logs out all registered backends.

We need a dedicated method for this, because we sometimes can't log the backend type when doing early initialization for backends initialized statically.

Definition at line 185 of file lease_mgr_factory.cc.

References isc::dhcp::DHCPSRV_LEASE_MGR_BACKENDS_REGISTERED, isc::dhcp::dhcpsrv_logger, and LOG_INFO.

Referenced by isc::dhcp::configureDhcp4Server(), and isc::dhcp::configureDhcp6Server().

recreate()

void isc::dhcp::LeaseMgrFactory::recreate ( const std::string & dbaccess, bool preserve_callbacks = true )

static

Recreate an instance of a lease manager with optionally preserving registered callbacks.

Parameters

dbaccess	Database access parameters. These are in the form of "keyword=value" pairs, separated by spaces. They are backend- -end specific, although must include the "type" keyword which gives the backend in use.
preserve_callbacks	a boolean flag indicating if all registered TrackingLeaseMgr callbacks should be copied to the new instance.

Definition at line 100 of file lease_mgr_factory.cc.

References create(), destroy(), haveInstance(), and instance().

Referenced by isc::dhcp::CfgDbAccess::createManagers().

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registeredFactory()

bool isc::dhcp::LeaseMgrFactory::registeredFactory ( const std::string & db_type )

static

Check if a lease mgr factory was registered.

Parameters

db_type

database type

Returns

true if a factory was registered for db_type, false if not.

Definition at line 179 of file lease_mgr_factory.cc.

registerFactory()

bool isc::dhcp::LeaseMgrFactory::registerFactory ( const std::string & db_type, const Factory & factory, bool no_log = false, DBVersion db_version = DBVersion() )

static

Register a lease mgr factory.

Associate the factory to a database type in the map. The no_log is to avoid logging before the logger is initialized as when called at global object initialization.

Parameters

db_type	database type
factory	lease mgr factory
no_log	do not log (default false)
db_version	lease mgr version

Returns

true if the factory was successfully added to the map, false if it already exists.

Definition at line 133 of file lease_mgr_factory.cc.

References isc::dhcp::DHCPSRV_DBG_TRACE, isc::dhcp::DHCPSRV_LEASE_MGR_BACKEND_REGISTER, isc::dhcp::dhcpsrv_logger, and LOG_DEBUG.

Referenced by isc::dhcp::MemfileLeaseMgrInit::MemfileLeaseMgrInit().

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

• lease_mgr_factory.h
• lease_mgr_factory.cc