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Take SessionCommand into use in readwritesplit

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Readwritesplit now uses the SessionCommand class as a "master list" of
executed session commands. This allows the session commands to be easily
copied over to slaves that are taken into use after session commands have
already been executed.

Currently, the code doesn't execute the session command history when a
mid-session reconnection occurs. A method to cleanly copy the session
commands needs to be exposed by the Backend class.
This commit is contained in:
Markus Mäkelä
2017-06-15 20:42:20 +03:00
parent b48bb4fc5e
commit 0c45eb5d17
6 changed files with 100 additions and 828 deletions
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7
server/modules/routing/readwritesplit/rwsplit_internal.hh
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@ -43,7 +43,7 @@ bool handle_target_is_all(route_target_t route_target,
GWBUF *querybuf, int packet_type, uint32_t qtype);
uint8_t determine_packet_type(GWBUF *querybuf, bool *non_empty_packet);
void log_transaction_status(ROUTER_CLIENT_SES *rses, GWBUF *querybuf, uint32_t qtype);
bool is_packet_a_one_way_message(int packet_type);
bool command_will_respond(uint8_t packet_type);
bool is_packet_a_query(int packet_type);
bool send_readonly_error(DCB *dcb);
@ -75,10 +75,7 @@ bool handle_master_is_target(ROUTER_INSTANCE *inst, ROUTER_CLIENT_SES *rses,
SRWBackend& target);
bool handle_got_target(ROUTER_INSTANCE *inst, ROUTER_CLIENT_SES *rses,
GWBUF *querybuf, SRWBackend& target, bool store);
bool route_session_write(ROUTER_CLIENT_SES *router_cli_ses,
GWBUF *querybuf, ROUTER_INSTANCE *inst,
int packet_type,
uint32_t qtype);
bool route_session_write(ROUTER_CLIENT_SES *rses, GWBUF *querybuf, uint8_t command);
void process_sescmd_response(ROUTER_CLIENT_SES* rses, SRWBackend& bref,
GWBUF** ppPacket, bool* reconnect);