Transaction class

Author: asfernandes

src/lib/Transaction.cpp

@@ -0,0 +1,198 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2025 Adriano dos Santos Fernandes
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * 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.
+ */
+
+#include "Transaction.h"
+#include "Attachment.h"
+#include "Client.h"
+#include "Exception.h"
+#include <cassert>
+
+using namespace fbcpp;
+using namespace fbcpp::impl;
+
+
+Transaction::Transaction(Attachment& attachment, const TransactionOptions& options)
+	: client{attachment.getClient()}
+{
+	assert(attachment.isValid());
+
+	const auto master = client.getMaster();
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	auto tpbBuilder = fbUnique(master->getUtilInterface()->getXpbBuilder(&statusWrapper, fb::IXpbBuilder::TPB,
+		reinterpret_cast<const std::uint8_t*>(options.getTpb().data()),
+		static_cast<unsigned>(options.getTpb().size())));
+
+	if (const auto accessMode = options.getAccessMode())
+	{
+		switch (accessMode.value())
+		{
+			case TransactionAccessMode::READ_ONLY:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_read);
+				break;
+
+			case TransactionAccessMode::READ_WRITE:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_write);
+				break;
+
+			default:
+				assert(false);
+				break;
+		}
+	}
+
+	if (const auto waitMode = options.getWaitMode())
+	{
+		switch (waitMode.value())
+		{
+			case TransactionWaitMode::NO_WAIT:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_nowait);
+				break;
+
+			case TransactionWaitMode::WAIT:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_wait);
+				break;
+
+			default:
+				assert(false);
+				break;
+		}
+	}
+
+	if (const auto isolationLevel = options.getIsolationLevel())
+	{
+		switch (isolationLevel.value())
+		{
+			case TransactionIsolationLevel::CONSISTENCY:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_consistency);
+				break;
+
+			case TransactionIsolationLevel::SNAPSHOT:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_concurrency);
+				break;
+
+			case TransactionIsolationLevel::READ_COMMITTED:
+				tpbBuilder->insertTag(&statusWrapper, isc_tpb_read_committed);
+
+				if (const auto readCommittedMode = options.getReadCommittedMode())
+				{
+					switch (readCommittedMode.value())
+					{
+						case TransactionReadCommittedMode::NO_RECORD_VERSION:
+							tpbBuilder->insertTag(&statusWrapper, isc_tpb_no_rec_version);
+							break;
+
+						case TransactionReadCommittedMode::RECORD_VERSION:
+							tpbBuilder->insertTag(&statusWrapper, isc_tpb_rec_version);
+							break;
+
+						default:
+							assert(false);
+							break;
+					}
+				}
+
+				break;
+
+			default:
+				assert(false);
+				break;
+		}
+	}
+
+	if (options.getNoAutoUndo())
+		tpbBuilder->insertTag(&statusWrapper, isc_tpb_no_auto_undo);
+
+	if (options.getIgnoreLimbo())
+		tpbBuilder->insertTag(&statusWrapper, isc_tpb_ignore_limbo);
+
+	if (options.getRestartRequests())
+		tpbBuilder->insertTag(&statusWrapper, isc_tpb_restart_requests);
+
+	if (options.getAutoCommit())
+		tpbBuilder->insertTag(&statusWrapper, isc_tpb_autocommit);
+
+	const auto tpbBuffer = tpbBuilder->getBuffer(&statusWrapper);
+	const auto tpbBufferLen = tpbBuilder->getBufferLength(&statusWrapper);
+
+	handle.reset(attachment.getHandle()->startTransaction(&statusWrapper, tpbBufferLen, tpbBuffer));
+}
+
+Transaction::Transaction(Attachment& attachment, std::string_view setTransactionCmd)
+	: client{attachment.getClient()}
+{
+	assert(attachment.isValid());
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	handle.reset(
+		attachment.getHandle()->execute(&statusWrapper, nullptr, static_cast<unsigned>(setTransactionCmd.length()),
+			setTransactionCmd.data(), SQL_DIALECT_V6, nullptr, nullptr, nullptr, nullptr));
+}
+
+void Transaction::rollback()
+{
+	assert(isValid());
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	handle->rollback(&statusWrapper);
+	handle.reset();
+}
+
+
+void Transaction::commit()
+{
+	assert(isValid());
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	handle->commit(&statusWrapper);
+	handle.reset();
+}
+
+void Transaction::commitRetaining()
+{
+	assert(isValid());
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	handle->commitRetaining(&statusWrapper);
+}
+
+void Transaction::rollbackRetaining()
+{
+	assert(isValid());
+
+	const auto status = client.newStatus();
+	StatusWrapper statusWrapper{client, status.get()};
+
+	handle->rollbackRetaining(&statusWrapper);
+}