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new way for doc unique terms: only path for monodoc, only path+ipath for doc inside multidoc, add pseudo-doc for file itself

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This commit is contained in:
dockes 2006-04-25 09:59:12 +00:00
parent 4928503f60
commit 4646f62d6b
2 changed files with 107 additions and 75 deletions
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58
src/index/indexer.cpp
View File

@ -1,5 +1,5 @@
#ifndef lint
static char rcsid[] = "@(#$Id: indexer.cpp,v 1.31 2006-04-12 10:41:39 dockes Exp $ (C) 2004 J.F.Dockes";
static char rcsid[] = "@(#$Id: indexer.cpp,v 1.32 2006-04-25 09:59:12 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
/*
* This program is free software; you can redistribute it and/or modify
@ -248,33 +248,48 @@ DbIndexer::processone(const std::string &fn, const struct stat *stp,
}
FileInterner interner(fn, m_config, m_tmpdir);
// File name transcoded to utf8 for indexation.
string charset = m_config->getDefCharset(true);
// If this fails, the file name won't be indexed, no big deal
// Note that we used to do the full path here, but I ended up believing
// that it made more sense to use only the file name
string utf8fn;
transcode(path_getsimple(fn), utf8fn, charset, "UTF-8");
FileInterner::Status fis = FileInterner::FIAgain;
bool hadNullIpath = false;
Rcl::Doc doc;
char ascdate[20];
sprintf(ascdate, "%ld", long(stp->st_ctime));
while (fis == FileInterner::FIAgain) {
Rcl::Doc doc;
doc.erase();
string ipath;
fis = interner.internfile(doc, ipath);
if (fis == FileInterner::FIError)
break;
if (fis == FileInterner::FIError) {
// We dont stop indexing for one bad doc
return FsTreeWalker::FtwOk;
}
// Set the date if this was not done in the document handler
if (doc.fmtime.empty()) {
char ascdate[20];
sprintf(ascdate, "%ld", long(stp->st_ctime));
doc.fmtime = ascdate;
}
// Internal access path for multi-document files
doc.ipath = ipath;
// File name transcoded to utf8 for indexation.
string charset = m_config->getDefCharset(true);
// If this fails, the file name won't be indexed, no big deal
// Note that we used to do the full path here, but I ended up believing
// that it made more sense to use only the file name
transcode(path_getsimple(fn), doc.utf8fn, charset, "UTF-8");
// Do database-specific work to update document data
// Internal access path for multi-document files
if (ipath.empty())
hadNullIpath = true;
else
doc.ipath = ipath;
doc.utf8fn = utf8fn;
// Add document to database
if (!m_db.add(fn, doc, stp))
return FsTreeWalker::FtwError;
// Tell what we are doing and check for interrupt request
if (m_updater) {
if ((++(m_updater->status.docsdone) % 10) == 0) {
m_updater->status.fn = fn;
@ -287,6 +302,19 @@ DbIndexer::processone(const std::string &fn, const struct stat *stp,
}
}
// If we had no instance with a null ipath, we create an empty
// document to stand for the file itself, to be used mainly for up
// to date checks. Typically this happens for an mbox file.
if (hadNullIpath == false) {
LOGDEB1(("Creating empty doc for file\n"));
Rcl::Doc fileDoc;
fileDoc.fmtime = doc.fmtime;
fileDoc.utf8fn = doc.utf8fn;
fileDoc.mimetype = doc.mimetype;
if (!m_db.add(fn, fileDoc, stp))
return FsTreeWalker::FtwError;
}
return FsTreeWalker::FtwOk;
}

124
src/rcldb/rcldb.cpp
View File

@ -1,5 +1,5 @@
#ifndef lint
static char rcsid[] = "@(#$Id: rcldb.cpp,v 1.71 2006-04-25 08:17:36 dockes Exp $ (C) 2004 J.F.Dockes";
static char rcsid[] = "@(#$Id: rcldb.cpp,v 1.72 2006-04-25 09:59:12 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
/*
* This program is free software; you can redistribute it and/or modify
@ -522,18 +522,20 @@ bool Db::add(const string &fn, const Doc &idoc,
string hash;
pathHash(fn, hash, PATHHASHLEN);
LOGDEB2(("Db::add: pathhash [%s]\n", hash.c_str()));
string pathterm = "P" + hash;
newdocument.add_term(pathterm);
// Unique term: with path, makes unique identifier for documents
// inside multidocument files.
// Unique term: makes unique identifier for documents
// either path or path+ipath inside multidocument files.
// We only add a path term if ipath is empty. Else there will be a qterm
// (path+ipath), and a pseudo-doc will be created to stand for the file
// itself (for up to date checks). This is handled by
// DbIndexer::processone()
string uniterm;
if (doc.ipath.empty()) {
uniterm = pathterm;
uniterm = "P" + hash;
} else {
uniterm = "Q" + hash + "|" + doc.ipath;
newdocument.add_term(uniterm);
uniterm = "Q" + hash + "|" + doc.ipath;
}
newdocument.add_term(uniterm);
// Dates etc...
time_t mtime = atol(doc.dmtime.empty() ? doc.fmtime.c_str() :
@ -613,11 +615,11 @@ bool Db::needUpdate(const string &filename, const struct stat *stp)
if (m_ndb == 0)
return false;
// If no document exist with this path, we do need update
string hash;
pathHash(filename, hash, PATHHASHLEN);
string pathterm = "P" + hash;
string pterm = "P" + hash;
const char *ermsg;
string qterm = "Q"+ hash + "|";
// Look for all documents with this path. We need to look at all
// to set their existence flag. We check the update time on the
@ -626,42 +628,54 @@ bool Db::needUpdate(const string &filename, const struct stat *stp)
// file changed)
Xapian::PostingIterator doc;
try {
if (!m_ndb->wdb.term_exists(pathterm)) {
LOGDEB1(("Db::needUpdate: no such path: %s\n", pathterm.c_str()));
if (!m_ndb->wdb.term_exists(pterm)) {
// If no document exist with this path, we do need update
LOGDEB2(("Db::needUpdate: no such path: [%s]\n", pterm.c_str()));
return true;
}
// Check the date using the Pterm doc or pseudo-doc
Xapian::PostingIterator docid = m_ndb->wdb.postlist_begin(pterm);
Xapian::Document doc = m_ndb->wdb.get_document(*docid);
string data = doc.get_data();
const char *cp = strstr(data.c_str(), "fmtime=");
if (cp) {
cp += 7;
} else {
cp = strstr(data.c_str(), "mtime=");
if (cp)
cp+= 6;
}
long mtime = cp ? atol(cp) : 0;
if (mtime < stp->st_mtime) {
LOGDEB2(("Db::needUpdate: yes: mtime: Db %ld file %ld\n",
(long)mtime, (long)stp->st_mtime));
// Db is not up to date. Let's index the file
return true;
}
Xapian::PostingIterator docid0 = m_ndb->wdb.postlist_begin(pathterm);
for (Xapian::PostingIterator docid = docid0;
docid != m_ndb->wdb.postlist_end(pathterm); docid++) {
LOGDEB2(("Db::needUpdate: uptodate: [%s]\n", pterm.c_str()));
Xapian::Document doc = m_ndb->wdb.get_document(*docid);
// Up to date.
// Check the date once. no need to look at the others if
// the db needs updating. Note that the fmtime used to be
// called mtime, and we're keeping compat
if (docid == docid0) {
string data = doc.get_data();
const char *cp = strstr(data.c_str(), "fmtime=");
if (cp) {
cp += 7;
} else {
cp = strstr(data.c_str(), "mtime=");
if (cp)
cp+= 6;
}
long mtime = cp ? atol(cp) : 0;
if (mtime < stp->st_mtime) {
LOGDEB2(("Db::needUpdate: yes: mtime: Db %ld file %ld\n",
(long)mtime, (long)stp->st_mtime));
// Db is not up to date. Let's index the file
return true;
}
}
// Set the uptodate flag for doc / pseudo doc
m_ndb->updated[*docid] = true;
// Db is up to date. Make a note that this document exists.
if (*docid < m_ndb->updated.size())
// Set the existence flag for all the subdocs (if any)
Xapian::TermIterator it = m_ndb->wdb.allterms_begin();
it.skip_to(qterm);
LOGDEB2(("First qterm: [%s]\n", (*it).c_str()));
for (;it != m_ndb->wdb.allterms_end(); it++) {
// If current term does not begin with qterm or has another |, not
// the same file
if ((*it).find(qterm) != 0 ||
(*it).find_last_of("|") != qterm.length() -1)
break;
docid = m_ndb->wdb.postlist_begin(*it);
if (*docid < m_ndb->updated.size()) {
LOGDEB2(("Db::needUpdate: set exist flag for docid %d [%s]\n",
*docid, (*it).c_str()));
m_ndb->updated[*docid] = true;
}
}
return false;
} catch (const Xapian::Error &e) {
@ -1246,9 +1260,7 @@ bool Db::getDoc(int exti, Doc &doc, int *percent)
return m_ndb->dbDataToRclDoc(data, doc, m_qOpts, docid, terms);
}
// Retrieve document defined by file name and internal path. Very inefficient,
// used only for history display. We'd need to enter path+ipath terms in the
// db if we wanted to make this more efficient.
// Retrieve document defined by file name and internal path.
bool Db::getDoc(const string &fn, const string &ipath, Doc &doc, int *pc)
{
LOGDEB(("Db:getDoc: [%s] (%d) [%s]\n", fn.c_str(), fn.length(),
@ -1265,32 +1277,24 @@ bool Db::getDoc(const string &fn, const string &ipath, Doc &doc, int *pc)
string hash;
pathHash(fn, hash, PATHHASHLEN);
string pathterm = "P" + hash;
// Look for all documents with this path, searching for the one
// with the appropriate ipath. This is very inefficient.
string pqterm = ipath.empty() ? "P" + hash : "Q" + hash + "|" + ipath;
const char *ermsg = "";
try {
if (!m_ndb->db.term_exists(pathterm)) {
if (!m_ndb->db.term_exists(pqterm)) {
// Document found in history no longer in the database.
// We return true (because their might be other ok docs further)
// but indicate the error with pc = -1
if (*pc)
*pc = -1;
LOGINFO(("Db:getDoc: no such path in index: [%s] (len %d)\n",
pathterm.c_str(), pathterm.length()));
LOGINFO(("Db:getDoc: no such doc in index: [%s] (len %d)\n",
pqterm.c_str(), pqterm.length()));
return true;
}
for (Xapian::PostingIterator docid =
m_ndb->db.postlist_begin(pathterm);
docid != m_ndb->db.postlist_end(pathterm); docid++) {
Xapian::Document xdoc = m_ndb->db.get_document(*docid);
string data = xdoc.get_data();
list<string> terms;
if (m_ndb->dbDataToRclDoc(data, doc, QO_NONE, *docid, terms)
&& doc.ipath == ipath)
return true;
}
Xapian::PostingIterator docid = m_ndb->db.postlist_begin(pqterm);
Xapian::Document xdoc = m_ndb->db.get_document(*docid);
string data = xdoc.get_data();
list<string> terms;
return m_ndb->dbDataToRclDoc(data, doc, QO_NONE, *docid, terms);
} catch (const Xapian::Error &e) {
ermsg = e.get_msg().c_str();
} catch (const string &s) {