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https://github.com/pocoproject/poco.git
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[SF 2580108] Improve transaction handling
This commit is contained in:
Aleksandar Fabijanic
@@ -89,7 +89,7 @@ private:
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private:
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MYSQL* h;
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MYSQL* _pHandle;
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};
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@@ -99,7 +99,7 @@ private:
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inline SessionHandle::operator MYSQL* ()
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{
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return h;
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return _pHandle;
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}
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@@ -1,146 +1,221 @@
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//
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// SessionImpl.h
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//
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// $Id: //poco/1.4/Data/MySQL/include/Poco/Data/MySQL/SessionImpl.h#1 $
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//
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// Library: Data
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// Package: MySQL
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// Module: SessionImpl
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//
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// Definition of the SessionImpl class.
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//
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// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Data_MySQL_SessionImpl_INCLUDED
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#define Data_MySQL_SessionImpl_INCLUDED
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#include "Poco/Data/MySQL/MySQL.h"
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#include "Poco/Data/AbstractSessionImpl.h"
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#include "Poco/Data/MySQL/SessionHandle.h"
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namespace Poco {
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namespace Data {
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namespace MySQL {
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class MySQL_API SessionImpl: public Poco::Data::AbstractSessionImpl<SessionImpl>
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/// Implements SessionImpl interface
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{
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public:
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SessionImpl(const std::string& connectionString);
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/// Creates the SessionImpl. Opens a connection to the database
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///
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/// Connection string format:
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/// <str> == <assignment> | <assignment> ';' <str>
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/// <assignment> == <name> '=' <value>
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/// <name> == 'host' | 'port' | 'user' | 'password' | 'db' } 'compress' | 'auto-reconnect'
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/// <value> == [~;]*
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///
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/// for compress and auto-reconnect correct values are true/false
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/// for port - numeric in decimal notation
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///
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~SessionImpl();
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/// Destroys the SessionImpl.
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virtual Poco::Data::StatementImpl* createStatementImpl();
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/// Returns an MySQL StatementImpl
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virtual void begin();
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/// Starts a transaction
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virtual void commit();
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/// Commits and ends a transaction
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virtual void rollback();
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/// Aborts a transaction
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virtual void close();
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/// Closes the connection
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virtual bool isConnected();
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/// Returns true iff session is connected.
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virtual bool isTransaction();
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/// Returns true iff a transaction is in progress.
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void setInsertId(const std::string&, const Poco::Any&);
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/// Try to set insert id - do nothing.
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Poco::Any getInsertId(const std::string&);
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/// Get insert id
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SessionHandle& handle();
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// Get handle
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//
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// SessionImpl.h
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//
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// $Id: //poco/1.4/Data/MySQL/include/Poco/Data/MySQL/SessionImpl.h#1 $
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//
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// Library: Data
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// Package: MySQL
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// Module: SessionImpl
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//
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// Definition of the SessionImpl class.
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//
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// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Data_MySQL_SessionImpl_INCLUDED
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#define Data_MySQL_SessionImpl_INCLUDED
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#include "Poco/Data/MySQL/MySQL.h"
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#include "Poco/Data/AbstractSessionImpl.h"
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#include "Poco/Data/MySQL/SessionHandle.h"
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#include "Poco/Mutex.h"
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namespace Poco {
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namespace Data {
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namespace MySQL {
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class MySQL_API SessionImpl: public Poco::Data::AbstractSessionImpl<SessionImpl>
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/// Implements SessionImpl interface
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{
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public:
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static const std::string MYSQL_READ_UNCOMMITTED;
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static const std::string MYSQL_READ_COMMITTED;
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static const std::string MYSQL_REPEATABLE_READ;
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static const std::string MYSQL_SERIALIZABLE;
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SessionImpl(const std::string& connectionString);
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/// Creates the SessionImpl. Opens a connection to the database
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///
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/// Connection string format:
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/// <str> == <assignment> | <assignment> ';' <str>
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/// <assignment> == <name> '=' <value>
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/// <name> == 'host' | 'port' | 'user' | 'password' | 'db' } 'compress' | 'auto-reconnect'
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/// <value> == [~;]*
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///
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/// for compress and auto-reconnect correct values are true/false
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/// for port - numeric in decimal notation
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///
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~SessionImpl();
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/// Destroys the SessionImpl.
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Poco::Data::StatementImpl* createStatementImpl();
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/// Returns an MySQL StatementImpl
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void begin();
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/// Starts a transaction
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void commit();
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/// Commits and ends a transaction
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void rollback();
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/// Aborts a transaction
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void close();
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/// Closes the connection
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bool isConnected();
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/// Returns true if connected, false otherwise.
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bool canTransact();
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/// Returns true if session has transaction capabilities.
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bool isTransaction();
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/// Returns true iff a transaction is a transaction is in progress, false otherwise.
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void setTransactionIsolation(Poco::UInt32 ti);
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/// Sets the transaction isolation level.
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Poco::UInt32 getTransactionIsolation();
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/// Returns the transaction isolation level.
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bool hasTransactionIsolation(Poco::UInt32 ti);
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/// Returns true iff the transaction isolation level corresponding
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/// to the supplied bitmask is supported.
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bool isTransactionIsolation(Poco::UInt32 ti);
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/// Returns true iff the transaction isolation level corresponds
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/// to the supplied bitmask.
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void autoCommit(const std::string&, bool val);
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/// Sets autocommit property for the session.
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bool isAutoCommit(const std::string& name="");
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/// Returns autocommit property value.
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void setInsertId(const std::string&, const Poco::Any&);
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/// Try to set insert id - do nothing.
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Poco::Any getInsertId(const std::string&);
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/// Get insert id
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SessionHandle& handle();
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// Get handle
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const std::string& connectorName();
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/// Returns the name of the connector.
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private:
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std::string _connector;
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SessionHandle _mysql;
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bool _connected;
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int _inTransaction;
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};
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//
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// inlines
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//
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inline void SessionImpl::setInsertId(const std::string&, const Poco::Any&)
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{
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}
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inline Poco::Any SessionImpl::getInsertId(const std::string&)
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{
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return Poco::Any(Poco::UInt64(mysql_insert_id(_mysql)));
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}
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inline SessionHandle& SessionImpl::handle()
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{
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return _mysql;
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private:
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template <typename T>
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inline T& getValue(MYSQL_BIND* pResult, T& val)
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{
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return val = *((T*) pResult->buffer);
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}
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template <typename T>
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T& getSetting(const std::string& name, T& val)
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/// Returns required setting.
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/// Limited to one setting at a time.
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{
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StatementExecutor ex(_handle);
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ResultMetadata metadata;
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metadata.reset();
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ex.prepare(Poco::format("SELECT @@%s", name));
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metadata.init(ex);
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if (metadata.columnsReturned() > 0)
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ex.bindResult(metadata.row());
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else
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throw InvalidArgumentException("No data returned.");
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ex.execute(); ex.fetch();
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MYSQL_BIND* pResult = metadata.row();
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return getValue<T>(pResult, val);
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}
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std::string _connector;
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SessionHandle _handle;
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bool _connected;
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bool _inTransaction;
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Poco::FastMutex _mutex;
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};
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//
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// inlines
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//
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inline bool SessionImpl::canTransact()
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{
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return true;
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}
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inline void SessionImpl::setInsertId(const std::string&, const Poco::Any&)
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{
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}
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inline Poco::Any SessionImpl::getInsertId(const std::string&)
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{
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return Poco::Any(Poco::UInt64(mysql_insert_id(_handle)));
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}
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inline SessionHandle& SessionImpl::handle()
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{
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return _handle;
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}
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inline const std::string& SessionImpl::connectorName()
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{
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return _connector;
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}
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} } } // namespace Poco::Data::MySQL
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#endif // Data_MySQL_SessionImpl_INCLUDED
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}
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inline bool SessionImpl::isTransactionIsolation(Poco::UInt32 ti)
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{
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return getTransactionIsolation() == ti;
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}
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template <>
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inline std::string& SessionImpl::getValue(MYSQL_BIND* pResult, std::string& val)
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{
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val.assign((char*) pResult->buffer, pResult->buffer_length);
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return val;
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}
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} } } // namespace Poco::Data::MySQL
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#endif // Data_MySQL_SessionImpl_INCLUDED
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@@ -96,7 +96,7 @@ private:
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private:
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MYSQL_STMT* h;
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MYSQL_STMT* _pHandle;
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int _state;
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std::string _query;
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};
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@@ -108,7 +108,7 @@ private:
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inline StatementExecutor::operator MYSQL_STMT* ()
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{
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return h;
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return _pHandle;
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}
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