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Move binlog event processing into a separate file

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This clarifies what parts of the router are specific to the binlogrouter
and what are common between the binlogrouter and avrorouter.

Ideally, the two modules would use the same infrastructure to handle the
processing of replication events. This is the first, albeit small, step
towards making the code in the binlogrouter the common infrastructure.
This commit is contained in:
Markus Mäkelä
2018-05-23 17:37:51 +03:00
parent 14a3b0052b
commit 5a3bbf0d15
6 changed files with 516 additions and 483 deletions
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45
server/modules/routing/binlogrouter/blr.h
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@ -30,6 +30,7 @@
#include <maxscale/buffer.h>
#include <maxscale/dcb.h>
#include <maxscale/protocol/mysql.h>
#include <maxscale/router.h>
#include <maxscale/secrets.h>
#include <maxscale/service.h>
#include <maxscale/sqlite3.h>
@ -665,7 +666,7 @@ typedef struct binlog_encryption_ctx
/**
* The per instance data for the router.
*/
typedef struct router_instance
typedef struct router_instance: public MXS_ROUTER
{
SERVICE *service; /*< Pointer to the service using this router */
ROUTER_SLAVE *slaves; /*< Link list of all the slave connections */
@ -766,6 +767,14 @@ typedef struct router_instance
struct router_instance *next;
} ROUTER_INSTANCE;
/** Master Semi-Sync capability */
typedef enum
{
MASTER_SEMISYNC_NOT_AVAILABLE, /*< Semi-Sync replication not available */
MASTER_SEMISYNC_DISABLED, /*< Semi-Sync is disabled */
MASTER_SEMISYNC_ENABLED /*< Semi-Sync is enabled */
} master_semisync_capability_t;
/**
* Holds information about:
* truncating a corrupted file
@ -943,6 +952,13 @@ static const char *blrs_states[] =
#define EXTRACT32(x) extract_field((x), 32)
#endif
#define MASTER_BYTES_BEFORE_EVENT 5
#define MASTER_BYTES_BEFORE_EVENT_SEMI_SYNC MASTER_BYTES_BEFORE_EVENT + 2
/* Semi-Sync indicator in network packet (byte 6) */
#define BLR_MASTER_SEMI_SYNC_INDICATOR 0xef
/* Semi-Sync flag ACK_REQ in network packet (byte 7) */
#define BLR_MASTER_SEMI_SYNC_ACK_REQ 0x01
/*
* Externals within the router
*/
@ -1022,6 +1038,33 @@ extern bool blr_start_master_in_main(void* data);
extern bool blr_binlog_file_exists(ROUTER_INSTANCE *router,
const MARIADB_GTID_INFO *info_file);
// Functions used by blr_handle_one_event
int blr_rotate_event(ROUTER_INSTANCE *router, uint8_t *ptr, REP_HEADER *hdr);
int blr_send_semisync_ack(ROUTER_INSTANCE *router, uint64_t pos);
bool blr_handle_fake_rotate(ROUTER_INSTANCE *router, REP_HEADER *hdr, uint8_t *ptr);
void blr_handle_fake_gtid_list(ROUTER_INSTANCE *router, REP_HEADER *hdr, uint8_t *ptr);
void blr_master_close(ROUTER_INSTANCE *);
void blr_notify_all_slaves(ROUTER_INSTANCE *router);
bool blr_save_mariadb_gtid(ROUTER_INSTANCE *inst);
void blr_master_delayed_connect(ROUTER_INSTANCE *router);
/**
* Handler for binlog events
*
* This function is called for each event replicated from the master.
*
* @param instance Router instance
* @param hdr Event header
* @param ptr Event data
* @param len Buffer length
* @param semisync 1 if semisync is enabled (TODO: change this)
*
* @return True if event was successfully processed, false if an error occurred
* and the processing should be stopped.
*/
bool blr_handle_one_event(MXS_ROUTER* instance, REP_HEADER& hdr, uint8_t* ptr, uint32_t len,
int semi_sync_send_ack);
MXS_END_DECLS
#endif