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- Committer: edam
- Date: 2010-07-27 15:12:55 UTC
- Revision ID: edam@waxworlds.org-20100727151255-goaqgdz4kj13q7gz
- update TODO
- added some missing includes for <string>
- changed usage of database::exec() to not require return code!
- prevented transaction_guard destructor from throwing an exception
- added some missing includes for <string>
- changed usage of database::exec() to not require return code!
- prevented transaction_guard destructor from throwing an exception
- files added:
- Makefile.in
- build-aux
- m4
- files removed:
- docs
- files renamed:
- include/sqlite3cc/connection.h => include/sqlite3cc/database.h
- src/connection.cc => src/database.cc
- files modified:
- .bzrignore
added
removed
include/sqlite3cc/transaction.h
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/*
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* transaction.h
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*
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* Copyright (C) 2009 Tim Marston <tim@ed.am>
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* Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
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*
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* This file is part of sqlite3cc (hereafter referred to as "this program").
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* See http://ed.am/dev/sqlite3cc for more information.
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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* details.
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* See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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{
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class connection;
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namespace detail
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{
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/**
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* A basic (default, deferred) transaction.
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*/
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class basic_transaction
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:
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private boost::noncopyable
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{
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//__________________________________________________________________________
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// instantiation
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public:
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/**
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* Constructor that provides a connection upon which to act.
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*
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* @param connection a connection
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*/
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explicit basic_transaction(
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connection &connection );
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//__________________________________________________________________________
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// public interface
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public:
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/**
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* Begin the transaction
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*/
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virtual void begin();
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/**
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* Commit the transaction
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*/
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virtual void commit();
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/**
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* Rollback the transaction
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*/
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virtual void rollback();
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//__________________________________________________________________________
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// implementation
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protected:
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/** reset any in-progress statements */
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void reset_active_queries();
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/** the connection on which to act */
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connection &_connection;
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};
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} // namespace detail
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////////////////////////////////////////////////////////////////////////////////
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/**
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* A deferred transaction.
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*/
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typedef detail::basic_transaction deferred_transaction;
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////////////////////////////////////////////////////////////////////////////////
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/**
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* An immediate transaction.
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*/
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class immediate_transaction
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class database;
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class basic_transaction
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:
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public detail::basic_transaction
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private boost::noncopyable
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{
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//______________________________________________________________________________
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// instantiation
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public:
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/**
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* Constructor that provides a connection upon which to act.
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*
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* @param connection a connection
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* Constructor that provides a database upon which to act
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* @param database a database
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*/
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explicit immediate_transaction(
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connection &connection );
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explicit basic_transaction(
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database &database );
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//______________________________________________________________________________
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// public interface
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public:
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/**
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* Begin the transaction.
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* Begin the transaction
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*/
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virtual void begin();
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/**
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* Commit the transaction
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*/
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virtual void commit();
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/**
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* Rollback the transaction
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*/
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virtual void rollback();
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//______________________________________________________________________________
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// implementation
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protected:
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/* the database on which to act */
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database &_database;
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};
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////////////////////////////////////////////////////////////////////////////////
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/**
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* An exclusive transaction.
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*/
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class exclusive_transaction
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:
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public detail::basic_transaction
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public basic_transaction
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{
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//______________________________________________________________________________
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// instantiation
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public:
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/**
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* Constructor that provides a connection upon which to act.
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*
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* @param connection a connection
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* Constructor that provides a database upon which to act
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* @param database a database
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*/
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explicit exclusive_transaction(
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connection &connection );
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database &database );
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//______________________________________________________________________________
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// public interface
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////////////////////////////////////////////////////////////////////////////////
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/**
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* A recursive transaction, allowing transactions to be nested.
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*/
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class recursive_transaction
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:
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public detail::basic_transaction
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public basic_transaction
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{
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//______________________________________________________________________________
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// instantiation
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public:
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/**
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* Constructor that provides a connection upon which to act.
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*
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* @param connection a connection
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* Constructor that provides a database upon which to act
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* @param database a database
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*/
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explicit recursive_transaction(
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connection &connection );
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database &database );
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//______________________________________________________________________________
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// public interface
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public:
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/**
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* Begin the transaction.
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* Begin the transaction
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*/
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virtual void begin();
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/**
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* Commit the transaction.
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* Commit the transaction
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*/
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virtual void commit();
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/**
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* Rollback the transaction.
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* Rollback the transaction
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*/
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virtual void rollback();
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////////////////////////////////////////////////////////////////////////////////
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/**
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* A scope guard (sentinel) for use with one of the transaction classes to
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* provide RAII-style transactions. It defaults to using deferred transactions.
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*/
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template< class T = deferred_transaction >
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template< class T = basic_transaction >
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class transaction_guard
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:
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private boost::noncopyable
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public:
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/**
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* Constructor that provides a connection upon which to act.
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*
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* @param connection a connection
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* Constructor that provides a database upon which to act
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* @param database a database
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*/
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explicit transaction_guard(
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connection &connection )
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database &database )
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:
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_transaction( connection ),
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_released( true )
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_transaction( database ),
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_released( false )
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{
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_transaction.begin();
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_released = false;
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}
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~transaction_guard()
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{
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if( !_released )
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_transaction.rollback();
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if( !_released ) {
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try {
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_transaction.rollback();
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}
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catch( ... ) {
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}
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}
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}
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//______________________________________________________________________________
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public:
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/**
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* Begin the transaction. Note that this is done automatically in the
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* constructor.
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*/
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void begin()
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{
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if( _released ) {
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_transaction.begin();
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_released = false;
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}
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}
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/**
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* Commit the transaction.
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* Commit the transaction
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*/
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void commit()
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{
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}
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}
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/**
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* Rollback the transaction. Note that this is done automatically in the
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* destructor if the transaction hasn't otherwise been completed.
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*/
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void rollback()
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{
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if( !_released ) {
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_transaction.rollback();
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_released = true;
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}
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}
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//______________________________________________________________________________
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// implementation
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protected:
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/** the transaction */
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/* the transaction */
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T _transaction;
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/** have we released the transaction yet? */
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/* have we released the transaction yet? */
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bool _released;
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};
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