CConcSessionContext Class Reference

common session data, sharable by multiple worker threads extracted from ddc-2.0.x CConcHolder; now CConcSession More...

#include <ConcSessionContext.h>

Inheritance diagram for CConcSessionContext:

Collaboration diagram for CConcSessionContext:

Public Member Functions
	CConcSessionContext ()
	~CConcSessionContext ()
bool	CacheGet (CConcHolder &Holder, const string &Query, DWORD &EndHitNo)
void	CacheSet (CConcHolder &Holder, const string &Query, vector< size_t >::const_iterator start, vector< size_t >::const_iterator end)
void	CacheClear ()
size_t	CacheSize ()
Public Member Functions inherited from ddcLockable
	ddcLockable ()
virtual	~ddcLockable ()
int	lock () const
int	unlock () const

Public Attributes
map< string, CQueryResult >	m_QueryCache
	hit results for the last MaxQueryCacheSize queries More...
deque< string >	m_Queries
	a deque for last MaxQueryCacheSize queries; m_Queries.last() is the last given query More...
Public Attributes inherited from ddcLockable
pthread_mutex_t	m_Mutex

Detailed Description

common session data, sharable by multiple worker threads extracted from ddc-2.0.x CConcHolder; now CConcSession

Constructor & Destructor Documentation

CConcSessionContext()

CConcSessionContext::CConcSessionContext ( )

inline

default constructor

~CConcSessionContext()

CConcSessionContext::~CConcSessionContext ( )

inline

default destructor

References CacheClear(), CacheGet(), CacheSet(), and CacheSize().

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Member Function Documentation

CacheGet()

bool CConcSessionContext::CacheGet	(	CConcHolder &	Holder,
		const string &	Query,
		DWORD &	EndHitNo
	)

fetch cached result for Query if available

• formerly CConcHolder::TryToGetFromCache()
• implicitly handles locking

  Parameters

  Holder	session object / result set to populate
  Query	query string (cache key) to be fetched
  EndHitNo	on call, index of first hit to retrieve; on return index of last hit retrieved

  Returns

  true on success, otherwise false

References CACHEDEBUG, CACHEDEBUGLOG, CConcSession::ClearQueryResults(), concord_daemon_log(), Format(), jsonStr(), ddcLockable::lock(), CQueryResult::m_AllHitsCount, CQueryResult::m_bSortByString, CQueryResult::m_DebugInfo, CQueryResult::m_HighlightIds, CQueryResult::m_HighlightOccurs, CQueryResult::m_Hits, CConcordance::m_MaxCachedHitsCount, CConcSession::m_pConcordance, m_Queries, m_QueryCache, CQueryResult::m_RelevantDocumentCount, CConcSession::m_ResultLimit, CConcSession::m_ResultOffset, CQueryResult::m_SortOrder, and ddcLockable::unlock().

Referenced by ~CConcSessionContext().

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CacheSet()

void CConcSessionContext::CacheSet	(	CConcHolder &	Holder,
		const string &	Query,
		vector< size_t >::const_iterator	start,
		vector< size_t >::const_iterator	end
	)

store a result for Query in the cache

• formerly CConcHolder::SaveToCache()
• implicitly handles locking

  Parameters

  Holder	session object / result set to store
  Query	query string (cache key) to be stored
  start	hit-index iterator wrt Holder.m_Hits[] of first hit to be stored
  end	hit-index iterator wrt Holder.m_Hits[] of first hit NOT to store

References CACHEDEBUGLOG, Format(), jsonStr(), ddcLockable::lock(), CQueryResult::m_AllHitsCount, CQueryResult::m_bSortByString, CQueryResult::m_DebugInfo, CQueryResult::m_HighlightIds, CQueryResult::m_HighlightOccurs, CQueryResult::m_Hits, CConcordance::m_MaxCachedHitsCount, CConcordance::m_MaxQueryCacheSize, CConcSession::m_pConcordance, m_Queries, m_QueryCache, CQueryResult::m_RelevantDocumentCount, CQueryResult::m_SortOrder, and ddcLockable::unlock().

Referenced by ~CConcSessionContext().

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CacheClear()

void CConcSessionContext::CacheClear

(

)

clear the query cache; implicitly handles locking

References ClearContainer(), ddcLockable::lock(), m_Queries, m_QueryCache, TrimHeap(), and ddcLockable::unlock().

Referenced by ~CConcSessionContext().

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CacheSize()

size_t CConcSessionContext::CacheSize

(

void

)

get current cache size; implicitly handles locking

References ddcLockable::lock(), m_QueryCache, and ddcLockable::unlock().

Referenced by ~CConcSessionContext().

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Member Data Documentation

m_QueryCache

map<string, CQueryResult> CConcSessionContext::m_QueryCache

hit results for the last MaxQueryCacheSize queries

Referenced by CacheClear(), CacheGet(), CacheSet(), and CacheSize().

m_Queries

deque<string> CConcSessionContext::m_Queries

a deque for last MaxQueryCacheSize queries; m_Queries.last() is the last given query

Referenced by CacheClear(), CacheGet(), and CacheSet().

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

• ConcSessionContext.h
• ConcSessionContext.cpp