Improve dead-lock error handling by making sure only 1 thread at time retries to execute a transaction so they don't keep dead-locking each other.
(cherry picked from commit 62001360dd)
Fix transactions not being recommitted on dead-lock error (error code 1213) because of calling http://dev.mysql.com/doc/refman/5.0/en/mysql-errno.html after sending the ROLLBACK command. This way the returned error code was related to the ROLLBACK command, not the failed transaction.
(cherry picked from commit d4db0c15c7)
- Implement DatabaseWorkerPool::DirectCommitTransaction for synchronous transaction execution (as opposed to asynchronous/enqueued).
- Add MySQL errno 1213 "Deadlock found when trying to get lock; try restarting transaction" handler. If 1213 is called the core will retry to directly execute the transaction a maximum of 5 times.
- Declare the datatypes used to determine transaction element data (prepared statement/adhoc query string) on a generic level in SQLOperation.h
- Implement variable SQL element data for SQLQueryHolder class so it can execute both prepared statements and adhoc queries
- Make MySQLConnection::Query for adhoc queries return pointer to type instead of an autopointer, the autopointer is now applied on higher level code just like the function for querying prepared statements
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branch : trunk
- Allow transactions to contain both raw ad-hoc queries and prepared statement elements
* When coding on high level code, just make sure you use the right argument type for Transaction::Append and the proper execution will be done automagically
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branch : trunk
- Implement sLog.outSQLDriver that will log SQL driver related events (non-content related).
- Queries will now be logged into this file as well instead of normal log file (requires debug build).
- Don´t forget to update your authserver.conf and worldserver.conf
Core/build:
- Fix non-PCH build
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branch : trunk
- All "'xxx' will be initialized after 'yyy' when initialized here"
- Some "unused variable"
- Some "enumeration value 'xxx' not handled in switch"
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branch : trunk
- Make SQL Transactions actual objects used in code. (Thanks to Derex for the idea)
* Uncommitted transactions will be automatically rolled back and cleaned up using ACE_Refcounted_Auto_Ptr, so no need to call Rollback() in the code.
* Prevents recursive transactions and makes developers aware of transactions going on.
* Gets rid of unneccesary overhead iterating over a concurrent map.
- Some cleanups in affected code, including better usage of transaction control in AH / mail related code to prevent data loss.
*** Experimental, use at own risk, recommended to backup your DBs. ***
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branch : trunk
