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Modules: API to log from module I/O callbacks.

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This commit is contained in:
antirez 2016-10-02 16:51:37 +02:00
parent 4674efdee2
commit a1b1fd4f39
2 changed files with 40 additions and 16 deletions
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54
src/module.c
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@ -2908,7 +2908,30 @@ void RM_EmitAOF(RedisModuleIO *io, const char *cmdname, const char *fmt, ...) {
* Logging
* -------------------------------------------------------------------------- */
/* Produces a log message to the standard Redis log, the format accepts
/* This is the low level function implementing both:
*
* RM_Log()
* RM_LogIOError()
*
*/
void RM_LogRaw(RedisModule *module, const char *levelstr, const char *fmt, va_list ap) {
char msg[LOG_MAX_LEN];
size_t name_len;
int level;
if (!strcasecmp(levelstr,"debug")) level = LL_DEBUG;
else if (!strcasecmp(levelstr,"verbose")) level = LL_VERBOSE;
else if (!strcasecmp(levelstr,"notice")) level = LL_NOTICE;
else if (!strcasecmp(levelstr,"warning")) level = LL_WARNING;
else level = LL_VERBOSE; /* Default. */
name_len = snprintf(msg, sizeof(msg),"<%s> ", module->name);
vsnprintf(msg + name_len, sizeof(msg) - name_len, fmt, ap);
serverLogRaw(level,msg);
}
/*
* Produces a log message to the standard Redis log, the format accepts
* printf-alike specifiers, while level is a string describing the log
* level to use when emitting the log, and must be one of the following:
*
@ -2923,26 +2946,24 @@ void RM_EmitAOF(RedisModuleIO *io, const char *cmdname, const char *fmt, ...) {
* a few lines of text.
*/
void RM_Log(RedisModuleCtx *ctx, const char *levelstr, const char *fmt, ...) {
va_list ap;
char msg[LOG_MAX_LEN];
size_t name_len;
int level;
if (!ctx->module) return; /* Can only log if module is initialized */
if (!strcasecmp(levelstr,"debug")) level = LL_DEBUG;
else if (!strcasecmp(levelstr,"verbose")) level = LL_VERBOSE;
else if (!strcasecmp(levelstr,"notice")) level = LL_NOTICE;
else if (!strcasecmp(levelstr,"warning")) level = LL_WARNING;
else level = LL_VERBOSE; /* Default. */
name_len = snprintf(msg, sizeof(msg),"<%s> ", ctx->module->name);
va_list ap;
va_start(ap, fmt);
vsnprintf(msg + name_len, sizeof(msg) - name_len, fmt, ap);
RM_LogRaw(ctx->module,levelstr,fmt,ap);
va_end(ap);
}
serverLogRaw(level,msg);
/* Log errors from RDB / AOF serialization callbacks.
*
* This function should be used when a callback is returning a critical
* error to the caller since cannot load or save the data for some
* critical reason. */
void RM_LogIOError(RedisModuleIO *io, const char *levelstr, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
RM_LogRaw(io->type->module,levelstr,fmt,ap);
va_end(ap);
}
/* --------------------------------------------------------------------------
@ -3261,6 +3282,7 @@ void moduleRegisterCoreAPI(void) {
REGISTER_API(LoadDouble);
REGISTER_API(EmitAOF);
REGISTER_API(Log);
REGISTER_API(LogIOError);
REGISTER_API(StringAppendBuffer);
REGISTER_API(RetainString);
REGISTER_API(StringCompare);

2
src/redismodule.h
View File

@ -185,6 +185,7 @@ char *REDISMODULE_API_FUNC(RedisModule_LoadStringBuffer)(RedisModuleIO *io, size
void REDISMODULE_API_FUNC(RedisModule_SaveDouble)(RedisModuleIO *io, double value);
double REDISMODULE_API_FUNC(RedisModule_LoadDouble)(RedisModuleIO *io);
void REDISMODULE_API_FUNC(RedisModule_Log)(RedisModuleCtx *ctx, const char *level, const char *fmt, ...);
void REDISMODULE_API_FUNC(RedisModule_LogIOError)(RedisModuleIO *io, const char *levelstr, const char *fmt, ...);
int REDISMODULE_API_FUNC(RedisModule_StringAppendBuffer)(RedisModuleCtx *ctx, RedisModuleString *str, const char *buf, size_t len);
void REDISMODULE_API_FUNC(RedisModule_RetainString)(RedisModuleCtx *ctx, RedisModuleString *str);
int REDISMODULE_API_FUNC(RedisModule_StringCompare)(RedisModuleString *a, RedisModuleString *b);
@ -282,6 +283,7 @@ static int RedisModule_Init(RedisModuleCtx *ctx, const char *name, int ver, int
REDISMODULE_GET_API(LoadDouble);
REDISMODULE_GET_API(EmitAOF);
REDISMODULE_GET_API(Log);
REDISMODULE_GET_API(LogIOError);
REDISMODULE_GET_API(StringAppendBuffer);
REDISMODULE_GET_API(RetainString);
REDISMODULE_GET_API(StringCompare);