xa::recovery Namespace Reference

Functions
bool	recover_prepared_in_tc_one_ht (THD *thd, plugin_ref plugin, void *arg)
	Callback to be invoked by ha_recover over each storage engine plugin. More...
bool	recover_one_ht (THD *thd, plugin_ref plugin, void *arg)
	Callback to be invoked by ha_recover over each storage engine plugin. More...

Function Documentation

recover_one_ht()

bool xa::recovery::recover_one_ht	(	THD *	thd,
		plugin_ref	plugin,
		void *	arg
	)

Callback to be invoked by ha_recover over each storage engine plugin.

1. It invokes handler::recover(XA_recover_txn[]) callback from the plugin interface, in order to retrieve the list of transactions that are, at the moment, in prepared state within the storage engine.
2. Invokes recover_one_internal_trx for all the retrieved transactions that are internally coordinated transactions.
3. Invokes recover_one_external_trx for all the retrieved transactions that are externally coordinated transactions.

Parameters

thd	The THD session object to be used in recovering the transactions.
plugin	The plugin interface for the storage engine to recover the transactions for.
arg	A pointer to struct xarecover_st that hold the information about the transaction coordinator state.

Returns

false if the recovery ended successfully, false otherwise.

recover_prepared_in_tc_one_ht()

bool xa::recovery::recover_prepared_in_tc_one_ht	(	THD *	thd,
		plugin_ref	plugin,
		void *	arg
	)

Callback to be invoked by ha_recover over each storage engine plugin.

1. It invokes handler::recover_prepared_in_tc(XA_recover_txn[]) callback from the plugin interface, in order to retrieve the list of transactions that are, at the moment, in prepared in TC state within the storage engine.
2. For all externally coordinated transactions that are in prepared in TC state, adds each to the list of recoverable XA transactions xarecover_st::xa_list in PREPARED state.

Parameters

thd	The THD session object to be used in recovering the transactions.
plugin	The plugin interface for the storage engine to recover the transactions for.
arg	A pointer to struct xarecover_st that hold the information about the transaction coordinator state.

Returns

false if the recovery ended successfully, false otherwise.