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Reset persistent MySQL connections

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When a persistent connection is taken from the pool, the state is reset
with a COM_CHANGE_USER on the next write. This allows reuse of persistent
connections without having to worry about the state of the MySQL session.
This commit is contained in:
Markus Makela
2016-10-28 11:57:52 +03:00
parent e8e2933b56
commit 5085b41d20
5 changed files with 102 additions and 20 deletions
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37
include/maxscale/protocol/mysql.h
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@ -262,28 +262,25 @@ typedef struct server_command_st
typedef struct
{
#if defined(SS_DEBUG)
skygw_chk_t protocol_chk_top;
skygw_chk_t protocol_chk_top;
#endif
int fd; /*< The socket descriptor */
struct dcb *owner_dcb; /*< The DCB of the socket
* we are running on */
SPINLOCK protocol_lock;
mysql_server_cmd_t current_command; /**< Current command being executed */
server_command_t protocol_command; /*< session command list */
server_command_t* protocol_cmd_history; /*< session command history */
mxs_auth_state_t protocol_auth_state; /*< Authentication status */
mysql_protocol_state_t protocol_state; /*< Protocol struct status */
uint8_t scramble[MYSQL_SCRAMBLE_LEN]; /*< server scramble,
* created or received */
uint32_t server_capabilities; /*< server capabilities,
* created or received */
uint32_t client_capabilities; /*< client capabilities,
* created or received */
unsigned long tid; /*< MySQL Thread ID, in
* handshake */
unsigned int charset; /*< MySQL character set at connect time */
int fd; /*< The socket descriptor */
struct dcb* owner_dcb; /*< The DCB of the socket we are running on */
SPINLOCK protocol_lock; /*< Protocol lock */
mysql_server_cmd_t current_command; /*< Current command being executed */
server_command_t protocol_command; /*< session command list */
server_command_t* protocol_cmd_history; /*< session command history */
mxs_auth_state_t protocol_auth_state; /*< Authentication status */
mysql_protocol_state_t protocol_state; /*< Protocol struct status */
uint8_t scramble[MYSQL_SCRAMBLE_LEN]; /*< server scramble, created or received */
uint32_t server_capabilities; /*< server capabilities, created or received */
uint32_t client_capabilities; /*< client capabilities, created or received */
unsigned long tid; /*< MySQL Thread ID, in handshake */
unsigned int charset; /*< MySQL character set at connect time */
bool ignore_reply; /*< If the reply should be discarded */
GWBUF* stored_query; /*< Temporarily stored queries */
#if defined(SS_DEBUG)
skygw_chk_t protocol_chk_tail;
skygw_chk_t protocol_chk_tail;
#endif
} MySQLProtocol;