mirror of https://github.com/redis/redis.git
312 lines
12 KiB
C
312 lines
12 KiB
C
/* This module is used to test the server events hooks API.
|
|
*
|
|
* -----------------------------------------------------------------------------
|
|
*
|
|
* Copyright (c) 2019, Salvatore Sanfilippo <antirez at gmail dot com>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of Redis nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "redismodule.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
/* We need to store events to be able to test and see what we got, and we can't
|
|
* store them in the key-space since that would mess up rdb loading (duplicates)
|
|
* and be lost of flushdb. */
|
|
RedisModuleDict *event_log = NULL;
|
|
|
|
typedef struct EventElement {
|
|
long count;
|
|
RedisModuleString *last_val_string;
|
|
long last_val_int;
|
|
} EventElement;
|
|
|
|
void LogStringEvent(RedisModuleCtx *ctx, const char* keyname, const char* data) {
|
|
EventElement *event = RedisModule_DictGetC(event_log, (void*)keyname, strlen(keyname), NULL);
|
|
if (!event) {
|
|
event = RedisModule_Alloc(sizeof(EventElement));
|
|
memset(event, 0, sizeof(EventElement));
|
|
RedisModule_DictSetC(event_log, (void*)keyname, strlen(keyname), event);
|
|
}
|
|
if (event->last_val_string) RedisModule_FreeString(ctx, event->last_val_string);
|
|
event->last_val_string = RedisModule_CreateString(ctx, data, strlen(data));
|
|
event->count++;
|
|
}
|
|
|
|
void LogNumericEvent(RedisModuleCtx *ctx, const char* keyname, long data) {
|
|
REDISMODULE_NOT_USED(ctx);
|
|
EventElement *event = RedisModule_DictGetC(event_log, (void*)keyname, strlen(keyname), NULL);
|
|
if (!event) {
|
|
event = RedisModule_Alloc(sizeof(EventElement));
|
|
memset(event, 0, sizeof(EventElement));
|
|
RedisModule_DictSetC(event_log, (void*)keyname, strlen(keyname), event);
|
|
}
|
|
event->last_val_int = data;
|
|
event->count++;
|
|
}
|
|
|
|
void FreeEvent(RedisModuleCtx *ctx, EventElement *event) {
|
|
if (event->last_val_string)
|
|
RedisModule_FreeString(ctx, event->last_val_string);
|
|
RedisModule_Free(event);
|
|
}
|
|
|
|
int cmdEventCount(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
|
|
{
|
|
if (argc != 2){
|
|
RedisModule_WrongArity(ctx);
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
EventElement *event = RedisModule_DictGet(event_log, argv[1], NULL);
|
|
RedisModule_ReplyWithLongLong(ctx, event? event->count: 0);
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
int cmdEventLast(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
|
|
{
|
|
if (argc != 2){
|
|
RedisModule_WrongArity(ctx);
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
EventElement *event = RedisModule_DictGet(event_log, argv[1], NULL);
|
|
if (event && event->last_val_string)
|
|
RedisModule_ReplyWithString(ctx, event->last_val_string);
|
|
else if (event)
|
|
RedisModule_ReplyWithLongLong(ctx, event->last_val_int);
|
|
else
|
|
RedisModule_ReplyWithNull(ctx);
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
void clearEvents(RedisModuleCtx *ctx)
|
|
{
|
|
RedisModuleString *key;
|
|
EventElement *event;
|
|
RedisModuleDictIter *iter = RedisModule_DictIteratorStart(event_log, "^", NULL);
|
|
while((key = RedisModule_DictNext(ctx, iter, (void**)&event)) != NULL) {
|
|
event->count = 0;
|
|
event->last_val_int = 0;
|
|
if (event->last_val_string) RedisModule_FreeString(ctx, event->last_val_string);
|
|
event->last_val_string = NULL;
|
|
RedisModule_DictDel(event_log, key, NULL);
|
|
RedisModule_Free(event);
|
|
}
|
|
RedisModule_DictIteratorStop(iter);
|
|
}
|
|
|
|
int cmdEventsClear(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
|
|
{
|
|
REDISMODULE_NOT_USED(argc);
|
|
REDISMODULE_NOT_USED(argv);
|
|
clearEvents(ctx);
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
/* Client state change callback. */
|
|
void clientChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
|
|
RedisModuleClientInfo *ci = data;
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_CLIENT_CHANGE_CONNECTED) ?
|
|
"client-connected" : "client-disconnected";
|
|
LogNumericEvent(ctx, keyname, ci->id);
|
|
}
|
|
|
|
void flushdbCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
|
|
RedisModuleFlushInfo *fi = data;
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_FLUSHDB_START) ?
|
|
"flush-start" : "flush-end";
|
|
LogNumericEvent(ctx, keyname, fi->dbnum);
|
|
}
|
|
|
|
void roleChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
|
|
RedisModuleReplicationInfo *ri = data;
|
|
char *keyname = (sub == REDISMODULE_EVENT_REPLROLECHANGED_NOW_MASTER) ?
|
|
"role-master" : "role-replica";
|
|
LogStringEvent(ctx, keyname, ri->masterhost);
|
|
}
|
|
|
|
void replicationChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_REPLICA_CHANGE_ONLINE) ?
|
|
"replica-online" : "replica-offline";
|
|
LogNumericEvent(ctx, keyname, 0);
|
|
}
|
|
|
|
void rasterLinkChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_MASTER_LINK_UP) ?
|
|
"masterlink-up" : "masterlink-down";
|
|
LogNumericEvent(ctx, keyname, 0);
|
|
}
|
|
|
|
void persistenceCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
|
|
char *keyname = NULL;
|
|
switch (sub) {
|
|
case REDISMODULE_SUBEVENT_PERSISTENCE_RDB_START: keyname = "persistence-rdb-start"; break;
|
|
case REDISMODULE_SUBEVENT_PERSISTENCE_AOF_START: keyname = "persistence-aof-start"; break;
|
|
case REDISMODULE_SUBEVENT_PERSISTENCE_SYNC_RDB_START: keyname = "persistence-syncrdb-start"; break;
|
|
case REDISMODULE_SUBEVENT_PERSISTENCE_ENDED: keyname = "persistence-end"; break;
|
|
case REDISMODULE_SUBEVENT_PERSISTENCE_FAILED: keyname = "persistence-failed"; break;
|
|
}
|
|
/* modifying the keyspace from the fork child is not an option, using log instead */
|
|
RedisModule_Log(ctx, "warning", "module-event-%s", keyname);
|
|
if (sub == REDISMODULE_SUBEVENT_PERSISTENCE_SYNC_RDB_START)
|
|
LogNumericEvent(ctx, keyname, 0);
|
|
}
|
|
|
|
void loadingCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
|
|
char *keyname = NULL;
|
|
switch (sub) {
|
|
case REDISMODULE_SUBEVENT_LOADING_RDB_START: keyname = "loading-rdb-start"; break;
|
|
case REDISMODULE_SUBEVENT_LOADING_AOF_START: keyname = "loading-aof-start"; break;
|
|
case REDISMODULE_SUBEVENT_LOADING_REPL_START: keyname = "loading-repl-start"; break;
|
|
case REDISMODULE_SUBEVENT_LOADING_ENDED: keyname = "loading-end"; break;
|
|
case REDISMODULE_SUBEVENT_LOADING_FAILED: keyname = "loading-failed"; break;
|
|
}
|
|
LogNumericEvent(ctx, keyname, 0);
|
|
}
|
|
|
|
void loadingProgressCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
|
|
RedisModuleLoadingProgress *ei = data;
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_LOADING_PROGRESS_RDB) ?
|
|
"loading-progress-rdb" : "loading-progress-aof";
|
|
LogNumericEvent(ctx, keyname, ei->progress);
|
|
}
|
|
|
|
void shutdownCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(data);
|
|
REDISMODULE_NOT_USED(sub);
|
|
|
|
RedisModule_Log(ctx, "warning", "module-event-%s", "shutdown");
|
|
}
|
|
|
|
void cronLoopCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
REDISMODULE_NOT_USED(sub);
|
|
|
|
RedisModuleCronLoop *ei = data;
|
|
LogNumericEvent(ctx, "cron-loop", ei->hz);
|
|
}
|
|
|
|
void moduleChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
|
|
{
|
|
REDISMODULE_NOT_USED(e);
|
|
|
|
RedisModuleModuleChange *ei = data;
|
|
char *keyname = (sub == REDISMODULE_SUBEVENT_MODULE_LOADED) ?
|
|
"module-loaded" : "module-unloaded";
|
|
LogStringEvent(ctx, keyname, ei->module_name);
|
|
}
|
|
|
|
/* This function must be present on each Redis module. It is used in order to
|
|
* register the commands into the Redis server. */
|
|
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
|
|
REDISMODULE_NOT_USED(argv);
|
|
REDISMODULE_NOT_USED(argc);
|
|
|
|
if (RedisModule_Init(ctx,"testhook",1,REDISMODULE_APIVER_1)
|
|
== REDISMODULE_ERR) return REDISMODULE_ERR;
|
|
|
|
/* replication related hooks */
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_ReplicationRoleChanged, roleChangeCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_ReplicaChange, replicationChangeCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_MasterLinkChange, rasterLinkChangeCallback);
|
|
|
|
/* persistence related hooks */
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_Persistence, persistenceCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_Loading, loadingCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_LoadingProgress, loadingProgressCallback);
|
|
|
|
/* other hooks */
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_ClientChange, clientChangeCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_FlushDB, flushdbCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_Shutdown, shutdownCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_CronLoop, cronLoopCallback);
|
|
RedisModule_SubscribeToServerEvent(ctx,
|
|
RedisModuleEvent_ModuleChange, moduleChangeCallback);
|
|
|
|
event_log = RedisModule_CreateDict(ctx);
|
|
|
|
if (RedisModule_CreateCommand(ctx,"hooks.event_count", cmdEventCount,"",0,0,0) == REDISMODULE_ERR)
|
|
return REDISMODULE_ERR;
|
|
if (RedisModule_CreateCommand(ctx,"hooks.event_last", cmdEventLast,"",0,0,0) == REDISMODULE_ERR)
|
|
return REDISMODULE_ERR;
|
|
if (RedisModule_CreateCommand(ctx,"hooks.clear", cmdEventsClear,"",0,0,0) == REDISMODULE_ERR)
|
|
return REDISMODULE_ERR;
|
|
|
|
return REDISMODULE_OK;
|
|
}
|
|
|
|
int RedisModule_OnUnload(RedisModuleCtx *ctx) {
|
|
clearEvents(ctx);
|
|
RedisModule_FreeDict(ctx, event_log);
|
|
event_log = NULL;
|
|
return REDISMODULE_OK;
|
|
}
|
|
|