When mco_db_sniffer() is called it must pass a callback function defined as follows:
typedef MCO_RET (*mco_sniffer_callback_t) (mco_db_h db, void* context, mco_trans_counter_t trans_no);
The parameters are as follows:
| db | A valid database connection handle. |
| context | A user-defined connection context. (This is normally opaque data of size MCO_CFG_CONNECTION_CONEXT_SIZE provided by function mco_db_connect_ctx(). |
| trans_no | The number of the active transaction (0 if there is no active transaction). (This is additional information that could help detect a hung transaction which could signify a dead connection.) |
An example of a sniffer implementation is provided in the SDK sample "samples/native/core/19-recovery/sniffer".