hcq/MaxScale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Initial implementation of the support for multiple slaves in read/write split router session. Omits configuration changes.

Browse Source
This commit is contained in:
VilhoRaatikka
2014-04-23 14:55:04 +03:00
parent a6ea56a153
commit 04313caf82
4 changed files with 543 additions and 409 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
server/modules/include/readwritesplit.h
View File

@ -31,15 +31,14 @@
#include <dcb.h>
/**
* Internal structure used to define the set of backend servers we are routing
* connections to. This provides the storage for routing module specific data
* that is required for each of the backend servers.
*/
typedef struct backend {
SERVER* backend_server; /*< The server itself */
int backend_conn_count; /*< Number of connections to the server */
} BACKEND;
typedef enum backend_type_t {
BE_UNDEFINED=-1,
BE_MASTER,
BE_JOINED = BE_MASTER,
BE_SLAVE,
BE_COUNT
} backend_type_t;
typedef struct rses_property_st rses_property_t;
typedef struct router_client_session ROUTER_CLIENT_SES;
@ -52,14 +51,6 @@ typedef enum rses_property_type_t {
RSES_PROP_TYPE_COUNT=RSES_PROP_TYPE_LAST+1
} rses_property_type_t;
typedef enum backend_type_t {
BE_UNDEFINED=-1,
BE_MASTER,
BE_JOINED = BE_MASTER,
BE_SLAVE,
BE_COUNT
} backend_type_t;
/**
* Session variable command
*/
@ -98,13 +89,38 @@ struct rses_property_st {
};
typedef struct sescmd_cursor_st {
#if defined(SS_DEBUG)
skygw_chk_t scmd_cur_chk_top;
#endif
ROUTER_CLIENT_SES* scmd_cur_rses; /*< pointer to owning router session */
rses_property_t** scmd_cur_ptr_property; /*< address of pointer to owner property */
mysql_sescmd_t* scmd_cur_cmd; /*< pointer to current session command */
bool scmd_cur_active; /*< true if command is being executed */
backend_type_t scmd_cur_be_type; /*< BE_MASTER or BE_SLAVE */
#if defined(SS_DEBUG)
skygw_chk_t scmd_cur_chk_tail;
#endif
} sescmd_cursor_t;
/**
* Internal structure used to define the set of backend servers we are routing
* connections to. This provides the storage for routing module specific data
* that is required for each of the backend servers.
*/
typedef struct backend {
#if defined(SS_DEBUG)
skygw_chk_t be_chk_top;
#endif
SERVER* backend_server; /*< The server itself */
int backend_conn_count; /*< Number of connections to the server */
bool be_valid; /*< valid when belongs to the router's configuration */
DCB* be_dcb;
/*< cursor is pointer and status variable to current session command */
sescmd_cursor_t be_sescmd_cursor;
#if defined(SS_DEBUG)
skygw_chk_t be_chk_tail;
#endif
} BACKEND;
/**
* The client session structure used within this router.
*/
@ -113,14 +129,13 @@ struct router_client_session {
skygw_chk_t rses_chk_top;
#endif
SPINLOCK rses_lock; /*< protects rses_deleted */
int rses_versno; /*< even = no active update, else odd */
int rses_versno; /*< even = no active update, else odd. not used 4/14 */
bool rses_closed; /*< true when closeSession is called */
/** Properties listed by their type */
rses_property_t* rses_properties[RSES_PROP_TYPE_COUNT];
BACKEND* rses_backend[BE_COUNT];/*< Backends used by client session */
DCB* rses_dcb[BE_COUNT];
/*< cursor is pointer and status variable to current session command */
sescmd_cursor_t rses_cursor[BE_COUNT];
BACKEND* rses_master; /*< Pointer to master */
BACKEND** rses_backend; /*< All backends used by client session */
int rses_nbackends;
int rses_capabilities; /*< input type, for example */
struct router_client_session* next;
#if defined(SS_DEBUG)