130 lines
4 KiB
C++
130 lines
4 KiB
C++
/* Copyright (C) 2007 J.F.Dockes
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _rcldb_p_h_included_
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#define _rcldb_p_h_included_
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#include "autoconfig.h"
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#include <map>
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#include <xapian.h>
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#ifdef IDX_THREADS
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#include "workqueue.h"
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#endif // IDX_THREADS
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#include "debuglog.h"
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#include "xmacros.h"
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#include "ptmutex.h"
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namespace Rcl {
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class Query;
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#ifdef IDX_THREADS
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class DbUpdTask {
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public:
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DbUpdTask(const string& ud, const string& un, const Xapian::Document &d,
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size_t tl)
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: udi(ud), uniterm(un), doc(d), txtlen(tl)
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{}
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string udi;
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string uniterm;
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Xapian::Document doc;
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size_t txtlen;
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};
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#endif // IDX_THREADS
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// A class for data and methods that would have to expose
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// Xapian-specific stuff if they were in Rcl::Db. There could actually be
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// 2 different ones for indexing or query as there is not much in
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// common.
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class Db::Native {
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public:
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Db *m_rcldb; // Parent
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bool m_isopen;
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bool m_iswritable;
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bool m_noversionwrite; //Set if open failed because of version mismatch!
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#ifdef IDX_THREADS
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WorkQueue<DbUpdTask*> m_wqueue;
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int m_loglevel;
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PTMutexInit m_mutex;
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#endif // IDX_THREADS
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// Indexing
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Xapian::WritableDatabase xwdb;
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// Querying (active even if the wdb is too)
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Xapian::Database xrdb;
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// We sometimes go through the wdb for some query ops, don't
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// really know if this makes sense
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Xapian::Database& xdb() {return m_iswritable ? xwdb : xrdb;}
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Native(Db *db)
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: m_rcldb(db), m_isopen(false), m_iswritable(false),
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m_noversionwrite(false)
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#ifdef IDX_THREADS
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, m_wqueue("DbUpd", 2)
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#endif // IDX_THREADS
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{
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LOGDEB2(("Native::Native: me %p\n", this));
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}
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~Native() {
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LOGDEB2(("Native::~Native: me %p\n", this));
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#ifdef IDX_THREADS
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if (m_iswritable) {
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void *status = m_wqueue.setTerminateAndWait();
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LOGDEB2(("Native::~Native: worker status %ld\n", long(status)));
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}
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#endif // IDX_THREADS
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}
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// Final steps of doc update, part which need to be single-threaded
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bool addOrUpdateWrite(const string& udi, const string& uniterm,
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Xapian::Document& doc, size_t txtlen);
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bool getPagePositions(Xapian::docid docid, vector<int>& vpos);
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int getPageNumberForPosition(const vector<int>& pbreaks, unsigned int pos);
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bool dbDataToRclDoc(Xapian::docid docid, std::string &data, Doc &doc);
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/** Compute list of subdocuments for a given udi. We look for documents
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* indexed by a parent term matching the udi, the posting list for the
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* parentterm(udi) (As suggested by James Aylett)
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*
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* Note that this is not currently recursive: all subdocs are supposed
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* to be children of the file doc.
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* Ie: in a mail folder, all messages, attachments, attachments of
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* attached messages etc. must have the folder file document as
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* parent.
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* Parent-child relationships are defined by the indexer (rcldb user)
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*
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* The file-system indexer currently works this way (flatly),
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* subDocs() could be relatively easily changed to support full recursivity
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* if needed.
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*/
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bool subDocs(const string &udi, vector<Xapian::docid>& docids);
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};
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// This is the word position offset at which we index the body text
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// (abstract, keywords, etc.. are stored before this)
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static const unsigned int baseTextPosition = 100000;
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}
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#endif /* _rcldb_p_h_included_ */
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