beedb/include/concurrency/transaction_callback.h

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2022-04-04 20:25:01 +02:00
/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include "transaction.h"
#include <functional>
namespace beedb::concurrency
{
/**
* The transaction callback will be called when a transaction begins
* and when the transaction was aborted or committed.
*/
class TransactionCallback
{
public:
TransactionCallback() = default;
virtual ~TransactionCallback() = default;
/**
* Will be called when a transaction starts.
* @param transaction Transaction that started.
*/
virtual void on_begin(Transaction *transaction) = 0;
/**
* Will be called when a transaction ends. This may be
* a successful or not successful commit or abort.
* @param transaction Transaction that ends.
* @param successful True, when successful committed.
*/
virtual void on_end(Transaction *transaction, const bool successful) = 0;
};
class SilentTransactionCallback : public TransactionCallback
{
public:
SilentTransactionCallback() = default;
~SilentTransactionCallback() override = default;
void on_begin(Transaction *) override
{
}
void on_end(Transaction *, const bool) override
{
}
};
/**
* This implementation of a transaction callback takes two lambdas
* that will be invoked on start and end of a transaction.
*/
class FunctionTransactionCallback : public TransactionCallback
{
public:
FunctionTransactionCallback(std::function<void(Transaction *)> &&begin_callback,
std::function<void(Transaction *, const bool)> &&end_callback)
: _begin_transaction_callback(std::move(begin_callback)), _end_transaction_callback(std::move(end_callback))
{
}
~FunctionTransactionCallback() override = default;
void on_begin(Transaction *transaction) override
{
_begin_transaction_callback(transaction);
}
void on_end(Transaction *transaction, const bool successful) override
{
_end_transaction_callback(transaction, successful);
}
private:
std::function<void(Transaction *)> _begin_transaction_callback;
std::function<void(Transaction *, const bool)> _end_transaction_callback;
};
} // namespace beedb::concurrency