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config.h: Added enumerated types MAX_RLAG_AVAILABLE and MAX_RLAG_UNDEFINED to be used instead of magic numbers as max_slave_replication_lag values.

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readwritesplit.h: Added TARGET_RLAG_MAX to the list of hint targets. It is used in case of hint max_slave_replication_lag=<value>
readwritesplit.c: get_dcb is called when readwritesplit router chooses target backend for a query. Backend is selected from those the router has connection to. get_dcb now takes additional parameters, name and max_rlag. Name is used if there is a hint route to server <server name>. max_rlag is used for hint max_slave_replication_lag=<value> or if it doesn't exist, then for configure parameter max_slave_replication_lag=<configured value> or if both are absent, ignored.
This commit is contained in:
VilhoRaatikka
2014-08-01 16:33:29 +03:00
parent 4f3d746f4e
commit 65b121889b
3 changed files with 74 additions and 20 deletions
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4
server/modules/include/readwritesplit.h
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@ -75,13 +75,15 @@ typedef enum {
TARGET_MASTER = 0x01,
TARGET_SLAVE = 0x02,
TARGET_NAMED_SERVER = 0x04,
TARGET_ALL = 0x08
TARGET_ALL = 0x08,
TARGET_RLAG_MAX = 0x10
} route_target_t;
#define TARGET_IS_MASTER(t) (t & TARGET_MASTER)
#define TARGET_IS_SLAVE(t) (t & TARGET_SLAVE)
#define TARGET_IS_NAMED_SERVER(t) (t & TARGET_NAMED_SERVER)
#define TARGET_IS_ALL(t) (t & TARGET_ALL)
#define TARGET_IS_RLAG_MAX(t) (t & TARGET_RLAG_MAX)
typedef struct rses_property_st rses_property_t;
typedef struct router_client_session ROUTER_CLIENT_SES;