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sqlitedbservice: Move to BEGIN IMMEDIATE TRANSACTION,finish queries

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This commit is contained in:
Albert S. 2024-05-23 18:46:01 +02:00
parent b0c0e34a25
commit 78962ad4e2
2 changed files with 63 additions and 13 deletions
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68
shared/sqlitedbservice.cpp
View File

@ -82,10 +82,9 @@ unsigned int SqliteDbService::getFiles(QVector<FileData> &results, QString wildC
throw LooqsGeneralException("Error while trying to retrieve files from database: " + query.lastError().text());
}
// TODO: port this to QRegularExpression once >5.12 gets more widespread because of this bug
// https://bugreports.qt.io/browse/QTBUG-72539?focusedCommentId=439053&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel
bool usePattern = !wildCardPattern.isEmpty();
QRegularExpression regexPattern(QRegularExpression::wildcardToRegularExpression(wildCardPattern));
QString regex = QRegularExpression::wildcardToRegularExpression(wildCardPattern, QRegularExpression::UnanchoredWildcardConversion);
QRegularExpression regexPattern(regex);
while(query.next())
{
@ -166,7 +165,7 @@ QVector<QString> SqliteDbService::getPathsForTag(QString tag)
bool SqliteDbService::setTags(QString path, const QSet<QString> &tags)
{
QSqlDatabase db = dbFactory->forCurrentThread();
if(!db.transaction())
if(!this->beginTransaction(db))
{
Logger::error() << "Failed to open transaction for " << path << " : " << db.lastError() << Qt::endl;
return false;
@ -182,6 +181,8 @@ bool SqliteDbService::setTags(QString path, const QSet<QString> &tags)
return false;
}
deletionQuery.finish();
for(const QString &tag : tags)
{
QSqlQuery tagQuery = QSqlQuery(db);
@ -193,6 +194,7 @@ bool SqliteDbService::setTags(QString path, const QSet<QString> &tags)
Logger::error() << "Failed to insert tag " << tagQuery.lastError() << Qt::endl;
return false;
}
tagQuery.finish();
QSqlQuery fileTagQuery(db);
fileTagQuery.prepare(
"INSERT INTO filetag(fileid, tagid) VALUES((SELECT id FROM file WHERE path = ?), (SELECT id "
@ -205,8 +207,9 @@ bool SqliteDbService::setTags(QString path, const QSet<QString> &tags)
Logger::error() << "Failed to assign tag to file" << Qt::endl;
return false;
}
fileTagQuery.finish();
}
if(!db.commit())
if(!this->commitTransaction(db))
{
db.rollback();
Logger::error() << "Failed to commit transaction when saving tags" << Qt::endl;
@ -240,6 +243,7 @@ bool SqliteDbService::insertToFTS(bool useTrigrams, QSqlDatabase &db, int fileid
Logger::error() << "Failed fts insertion " << ftsQuery.lastError() << Qt::endl;
return false;
}
ftsQuery.finish();
QSqlQuery contentQuery(db);
contentQuery.prepare(contentInsertStatement);
contentQuery.addBindValue(fileid);
@ -249,6 +253,7 @@ bool SqliteDbService::insertToFTS(bool useTrigrams, QSqlDatabase &db, int fileid
Logger::error() << "Failed content insertion " << contentQuery.lastError() << Qt::endl;
return false;
}
contentQuery.finish();
}
return true;
}
@ -314,6 +319,32 @@ bool SqliteDbService::execBool(QString querystr, std::initializer_list<QVariant>
return query.value(0).toBool();
}
/*
* The default only opens BEGIN TRANSACTION, but for multi-threaded, IMMEDIATE TRANSACTION is the more reasonable choice */
bool SqliteDbService::beginTransaction(QSqlDatabase &db)
{
QSqlQuery query(db);
if(!query.exec("BEGIN IMMEDIATE TRANSACTION"))
{
Logger::error() << "Immediate transaction could not be acquired" << query.lastError() << Qt::endl;
/* TODO: handle maybe the busy time out here */
return false;
}
return true;
}
bool SqliteDbService::commitTransaction(QSqlDatabase &db)
{
QSqlQuery query(db);
if(!query.exec("COMMIT TRANSACTION"))
{
Logger::error() << "Transaction failed to commit" << Qt::endl;
/* TODO: handle maybe the busy time out here */
return false;
}
return true;
}
SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResult &processResult, bool pathsOnly)
{
QString absPath = fileInfo.absoluteFilePath();
@ -324,6 +355,11 @@ SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResu
fileType = 'f';
}
/* Insertion can take a long time and other threads can be be busy... we are not guaranteed to get a lock for the transaction.
* Don't want to set the sqlite busy handler to eternity. */
QMutexLocker lock(&this->writeMutex);
QSqlDatabase db = dbFactory->forCurrentThread();
QSqlQuery delQuery(db);
delQuery.prepare("DELETE FROM file WHERE path = ?");
@ -336,7 +372,7 @@ SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResu
inserterQuery.addBindValue(fileInfo.size());
inserterQuery.addBindValue(fileType);
if(!db.transaction())
if(!this->beginTransaction(db))
{
Logger::error() << "Failed to open transaction for " << absPath << " : " << db.lastError() << Qt::endl;
return DBFAIL;
@ -348,6 +384,7 @@ SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResu
db.rollback();
return DBFAIL;
}
delQuery.finish();
if(!inserterQuery.exec())
{
@ -355,10 +392,11 @@ SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResu
db.rollback();
return DBFAIL;
}
int lastid = inserterQuery.lastInsertId().toInt();
inserterQuery.finish();
if(!pathsOnly)
{
int lastid = inserterQuery.lastInsertId().toInt();
if(!insertToFTS(false, db, lastid, processResult.pages))
{
db.rollback();
@ -379,7 +417,7 @@ SaveFileResult SqliteDbService::saveFile(QFileInfo fileInfo, DocumentProcessResu
}
}
if(!db.commit())
if(!this->commitTransaction(db))
{
db.rollback();
Logger::error() << "Failed to commit transaction for " << absPath << " : " << db.lastError() << Qt::endl;
@ -409,7 +447,7 @@ bool SqliteDbService::addTag(QString tag, const QVector<QString> &paths)
fileTagQuery.prepare("INSERT INTO filetag(fileid, tagid) VALUES((SELECT id FROM file WHERE path = ?), (SELECT id "
"FROM tag WHERE name = ?))");
fileTagQuery.bindValue(1, tag);
if(!db.transaction())
if(!this->beginTransaction(db))
{
Logger::error() << "Failed to open transaction to add paths for tag " << tag << " : " << db.lastError()
<< Qt::endl;
@ -421,6 +459,7 @@ bool SqliteDbService::addTag(QString tag, const QVector<QString> &paths)
Logger::error() << "Failed INSERT query" << tagQuery.lastError() << Qt::endl;
return false;
}
tagQuery.finish();
for(const QString &path : paths)
{
@ -431,9 +470,9 @@ bool SqliteDbService::addTag(QString tag, const QVector<QString> &paths)
Logger::error() << "Failed to add paths to tag" << Qt::endl;
return false;
}
fileTagQuery.finish();
}
if(!db.commit())
if(!this->commitTransaction(db))
{
db.rollback();
Logger::error() << "Failed to commit tag insertion transaction" << db.lastError() << Qt::endl;
@ -464,6 +503,7 @@ bool SqliteDbService::removePathsForTag(QString tag, const QVector<QString> &pat
Logger::error() << "An error occured while trying to remove paths from tag assignment" << Qt::endl;
return false;
}
fileTagQuery.finish();
}
return true;
}
@ -471,7 +511,7 @@ bool SqliteDbService::removePathsForTag(QString tag, const QVector<QString> &pat
bool SqliteDbService::deleteTag(QString tag)
{
QSqlDatabase db = dbFactory->forCurrentThread();
if(!db.transaction())
if(!this->beginTransaction(db))
{
Logger::error() << "Failed to open transaction while trying to delete tag " << tag << " : " << db.lastError()
<< Qt::endl;
@ -488,6 +528,7 @@ bool SqliteDbService::deleteTag(QString tag)
Logger::error() << "Error while trying to delete tag: " << db.lastError() << Qt::endl;
return false;
}
assignmentDeleteQuery.finish();
QSqlQuery deleteTagQuery(db);
deleteTagQuery.prepare("DELETE FROM tag WHERE name = ?");
@ -498,8 +539,9 @@ bool SqliteDbService::deleteTag(QString tag)
Logger::error() << "Error while trying to delete tag: " << db.lastError() << Qt::endl;
return false;
}
deleteTagQuery.finish();
if(!db.commit())
if(!this->commitTransaction(db))
{
db.rollback();
Logger::error() << "Error while trying to delete tag: " << db.lastError() << Qt::endl;

8
shared/sqlitedbservice.h
View File

@ -1,6 +1,7 @@
#ifndef SQLITEDBSERVICE_H
#define SQLITEDBSERVICE_H
#include <QFileInfo>
#include <QMutexLocker>
#include <optional>
#include "databasefactory.h"
@ -20,6 +21,11 @@ class SqliteDbService
QSqlQuery exec(QString query, std::initializer_list<QVariant> args);
bool execBool(QString querystr, std::initializer_list<QVariant> args);
bool beginTransaction(QSqlDatabase &db);
bool commitTransaction(QSqlDatabase &db);
QMutex writeMutex;
public:
SqliteDbService(DatabaseFactory &dbFactory);
SaveFileResult saveFile(QFileInfo fileInfo, DocumentProcessResult &pageData, bool pathsOnly);
@ -43,6 +49,8 @@ class SqliteDbService
std::optional<QChar> queryFileType(QString absPath);
bool insertOutline(QSqlDatabase &db, int fileid, const QVector<DocumentOutlineEntry> &outlines);
bool runWalCheckpoint();
};
#endif // SQLITEDBSERVICE_H