memindex Class Reference

implementation of terimber_memindex interface More...

#include <memdb.h>

Inheritance diagram for memindex:

List of all members.

Public Member Functions

virtual terimber_memlookup * add_lookup (const terimber_db_value_vector *info)

for navigation the user has to create index lookup first the list of values should be the same length & type as the index columns or less for example, let us assume that we got the index with two columns (id, integer) & (name, string) if the user provides values for id & name then the lookup will search for rows with specified id & name however, if only id is specified, lookup will ignore the second column values. it's impossible to set search lookup on the second column without setting the first column to do such a thing the user needs to create index with a different order of index columns, for instance name and id, and set search criteria for the name column. user is allowed to ignore search criteria completely, then lookup will move row by row in the order they came from the database, including the row with status = deleted

virtual bool remove_lookup (terimber_memlookup *obj)

destroys lookup after using

const memtable & get_table () const

returns const memtable

memtable & get_table ()

returns memtable

const memdb_index_t & get_index ()

returns index table

Protected Member Functions

memindex (memtable &parent, const memdb_rowset_less &pred)

constructor

virtual ~memindex ()

destructor users can't call destructor, memtable will take case about cleanup

Private Types

typedef list< memlookup * > list_lookups_t

list of lookups

Private Member Functions

bool construct ()

constructs index

void notify (memdb_rowset_citerator_t iter, bool insert_or_delete)

notifies all lookup about changes

Private Attributes

memtable & _parent

parent memtable

memdb_index_t _index

index table

mutex _mtx

mutex

list_lookups_t _lookups

list of lookups

Friends

class memtable

memtable

Detailed Description

implementation of terimber_memindex interface

Definition at line 647 of file memdb.h.

Member Typedef Documentation

memindex::list_lookups_t [private]

list of lookups

Definition at line 654 of file memdb.h.

Constructor & Destructor Documentation

BEGIN_TERIMBER_NAMESPACE memindex::memindex	(	memtable &	parent,
		const memdb_rowset_less &	pred
	)			`[protected]`

constructor

Parameters:

parent	parent memtable
pred	predicate for row copmparision

Definition at line 38 of file memindex.cpp.

memindex::~memindex ( ) [protected, virtual]

destructor users can't call destructor, memtable will take case about cleanup

Definition at line 44 of file memindex.cpp.

References _lookups, _mtx, base_list< T >::begin(), list< T >::clear(), and base_list< T >::end().

Member Function Documentation

terimber_memlookup * memindex::add_lookup ( const terimber_db_value_vector * info ) [virtual]

for navigation the user has to create index lookup first the list of values should be the same length & type as the index columns or less for example, let us assume that we got the index with two columns (id, integer) & (name, string) if the user provides values for id & name then the lookup will search for rows with specified id & name however, if only id is specified, lookup will ignore the second column values. it's impossible to set search lookup on the second column without setting the first column to do such a thing the user needs to create index with a different order of index columns, for instance name and id, and set search criteria for the name column. user is allowed to ignore search criteria completely, then lookup will move row by row in the order they came from the database, including the row with status = deleted

Parameters:

info

value vector

Implements terimber_memindex.

Definition at line 64 of file memindex.cpp.

References _lookups, _mtx, memlookup::construct(), terimber_log_helper::log_on(), and list< T >::push_back().

bool memindex::remove_lookup ( terimber_memlookup * obj ) [virtual]

destroys lookup after using

Parameters:

obj

pointer to the lookup object

Implements terimber_memindex.