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feat(libxce-failover): reconnect/rejoin hook — public setter + post-reconnect invocation before resume (task 4.1)

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Rongsong Shen 2026-06-17 03:46:05 +00:00
parent 12284bc3f5
commit 8783ce5a9d
6 changed files with 264 additions and 26 deletions
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14
src/include/client.h
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@ -11,6 +11,18 @@
typedef void* xcecli_ctx_t;
/*
* xcecli_reconnect_cb: consumer rejoin hook invoked once per transparent
* reconnect/failover, AFTER the reconnect/recovery and BEFORE the interrupted
* op resumes. The callback CONTENT (join handshake, worker job re-sync) belongs
* to the consumer; libxce owns only the mechanism + ordering. Runs on the
* calling thread. Return 0 to proceed with the interrupted op; <0 to treat the
* rejoin as failed (the new primary rejected the join) so the failover loop
* rotates/backs off again instead of resuming. Pure clients register NO hook
* (NULL) — the loop then resumes directly.
*/
typedef int (*xcecli_reconnect_cb)(xcecli_ctx_t ctx, void* arg);
#define N_MAX_MASTERS (3)
typedef struct {
@ -26,6 +38,8 @@ typedef struct {
extern int xcecli_ctx_init(xcecli_ctx_t*, xce_client_config_t*);
extern void xcecli_ctx_fini(xcecli_ctx_t);
extern int xcecli_set_handler(xcecli_ctx_t, xce_request_handler_t, void*);
extern int xcecli_set_reconnect_handler(xcecli_ctx_t, xcecli_reconnect_cb,
void*);
extern int xcecli_start(xcecli_ctx_t);
extern int xcecli_stop(xcecli_ctx_t);
extern int xcecli_wakeup(xcecli_ctx_t, int);