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#include "index.h"
#include "log.h"
Index::Index(const QString &storageRoot, const QString &name, Sink::Storage::DataStore::AccessMode mode)
: mTransaction(Sink::Storage::DataStore(storageRoot, name, mode).createTransaction(mode)),
mDb(mTransaction.openDatabase(name.toLatin1(), std::function<void(const Sink::Storage::DataStore::Error &)>(), true)),
mName(name),
mLogCtx("index." + name.toLatin1())
{
}
Index::Index(const QByteArray &name, Sink::Storage::DataStore::Transaction &transaction)
: mDb(transaction.openDatabase(name, std::function<void(const Sink::Storage::DataStore::Error &)>(), true)), mName(name),
mLogCtx("index." + name)
{
}
void Index::add(const QByteArray &key, const QByteArray &value)
{
mDb.write(key, value, [&] (const Sink::Storage::DataStore::Error &error) {
SinkWarningCtx(mLogCtx) << "Error while writing value" << error;
});
}
void Index::remove(const QByteArray &key, const QByteArray &value)
{
mDb.remove(key, value, [&] (const Sink::Storage::DataStore::Error &error) {
SinkWarningCtx(mLogCtx) << "Error while removing value: " << key << value << error;
});
}
void Index::lookup(const QByteArray &key, const std::function<void(const QByteArray &value)> &resultHandler, const std::function<void(const Error &error)> &errorHandler, bool matchSubStringKeys)
{
mDb.scan(key,
[&](const QByteArray &key, const QByteArray &value) -> bool {
resultHandler(value);
return true;
},
[&](const Sink::Storage::DataStore::Error &error) {
SinkWarningCtx(mLogCtx) << "Error while retrieving value:" << error << mName;
errorHandler(Error(error.store, error.code, error.message));
},
matchSubStringKeys);
}
QByteArray Index::lookup(const QByteArray &key)
{
QByteArray result;
//We have to create a deep copy, otherwise the returned data may become invalid when the transaction ends.
lookup(key, [&](const QByteArray &value) { result = QByteArray(value.constData(), value.size()); }, [](const Index::Error &) { });
return result;
}
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