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#include "database.h"
#include <iostream>
#include <QAtomicInt>
#include <QDebug>
#include <QDir>
#include <QFileInfo>
#include <QReadWriteLock>
#include <QString>
#include <QTime>
#include <kchashdb.h>
class Database::Private
{
public:
Private(const QString &storageRoot, const QString &name);
~Private();
kyotocabinet::TreeDB db;
bool dbOpen;
bool inTransaction;
};
Database::Private::Private(const QString &storageRoot, const QString &name)
: inTransaction(false)
{
QDir dir;
dir.mkdir(storageRoot);
//create file
dbOpen = db.open((storageRoot + "/" + name + ".kch").toStdString(), kyotocabinet::BasicDB::OWRITER | kyotocabinet::BasicDB::OCREATE);
if (!dbOpen) {
// TODO: handle error
}
}
Database::Private::~Private()
{
if (dbOpen && inTransaction) {
db.end_transaction(false);
}
}
Database::Database(const QString &storageRoot, const QString &name)
: d(new Private(storageRoot, name))
{
}
Database::~Database()
{
delete d;
}
bool Database::isInTransaction() const
{
return d->inTransaction;
}
bool Database::startTransaction(TransactionType type)
{
if (!d->dbOpen) {
return false;
}
if (d->inTransaction) {
return true;
}
//TODO handle errors
d->inTransaction = d->db.begin_transaction();
return d->inTransaction;
}
bool Database::commitTransaction()
{
if (!d->dbOpen) {
return false;
}
if (!d->inTransaction) {
return false;
}
bool success = d->db.end_transaction(true);
d->inTransaction = false;
return success;
}
void Database::abortTransaction()
{
if (!d->dbOpen || !d->inTransaction) {
return;
}
d->db.end_transaction(false);
d->inTransaction = false;
}
bool Database::write(const char *key, size_t keySize, const char *value, size_t valueSize)
{
if (!d->dbOpen) {
return false;
}
bool success = d->db.set(key, keySize, value, valueSize);
return success;
}
bool Database::write(const std::string &sKey, const std::string &sValue)
{
if (!d->dbOpen) {
return false;
}
bool success = d->db.set(sKey, sValue);
return success;
}
void Database::read(const std::string &sKey, const std::function<void(const std::string &value)> &resultHandler)
{
if (!d->dbOpen) {
return;
}
std::string value;
if (d->db.get(sKey, &value)) {
resultHandler(value);
}
}
void Database::read(const std::string &sKey, const std::function<void(void *ptr, int size)> &resultHandler)
{
if (!d->dbOpen) {
return;
}
size_t valueSize;
char *valueBuffer = d->db.get(sKey.data(), sKey.size(), &valueSize);
resultHandler(valueBuffer, valueSize);
delete[] valueBuffer;
}
qint64 Database::diskUsage() const
{
if (!d->dbOpen) {
return 0;
}
QFileInfo info(QString::fromStdString(d->db.path()));
return info.size();
}
void Database::removeFromDisk() const
{
if (!d->dbOpen) {
return;
}
QFileInfo info(QString::fromStdString(d->db.path()));
QDir dir = info.dir();
dir.remove(info.fileName());
}
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