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/* This module is used to test the propagation (replication + AOF) of
* commands, via the RedisModule_Replicate() interface, in asynchronous
* contexts, such as callbacks not implementing commands, and thread safe
* contexts.
*
* We create a timer callback and a threads using a thread safe context.
* Using both we try to propagate counters increments, and later we check
* if the replica contains the changes as expected.
*
* -----------------------------------------------------------------------------
*
* Copyright (c) 2019-Present, Redis Ltd.
* All rights reserved.
*
* Licensed under your choice of (a) the Redis Source Available License 2.0
* (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
* GNU Affero General Public License v3 (AGPLv3).
*/
#include "redismodule.h"
#include <pthread.h>
#include <errno.h>
#define UNUSED(V) ((void) V)
RedisModuleCtx *detached_ctx = NULL;
static int KeySpace_NotificationGeneric(RedisModuleCtx *ctx, int type, const char *event, RedisModuleString *key) {
REDISMODULE_NOT_USED(type);
REDISMODULE_NOT_USED(event);
REDISMODULE_NOT_USED(key);
RedisModuleCallReply* rep = RedisModule_Call(ctx, "INCR", "c!", "notifications");
RedisModule_FreeCallReply(rep);
return REDISMODULE_OK;
}
/* Timer callback. */
void timerHandler(RedisModuleCtx *ctx, void *data) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(data);
static int times = 0;
RedisModule_Replicate(ctx,"INCR","c","timer");
times++;
if (times < 3)
RedisModule_CreateTimer(ctx,100,timerHandler,NULL);
else
times = 0;
}
int propagateTestTimerCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleTimerID timer_id =
RedisModule_CreateTimer(ctx,100,timerHandler,NULL);
REDISMODULE_NOT_USED(timer_id);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
/* Timer callback. */
void timerNestedHandler(RedisModuleCtx *ctx, void *data) {
int repl = (long long)data;
/* The goal is the trigger a module command that calls RM_Replicate
* in order to test MULTI/EXEC structure */
RedisModule_Replicate(ctx,"INCRBY","cc","timer-nested-start","1");
RedisModuleCallReply *reply = RedisModule_Call(ctx,"propagate-test.nested", repl? "!" : "");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "INCR", repl? "c!" : "c", "timer-nested-middle");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx,"INCRBY","cc","timer-nested-end","1");
}
int propagateTestTimerNestedCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleTimerID timer_id =
RedisModule_CreateTimer(ctx,100,timerNestedHandler,(void*)0);
REDISMODULE_NOT_USED(timer_id);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int propagateTestTimerNestedReplCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleTimerID timer_id =
RedisModule_CreateTimer(ctx,100,timerNestedHandler,(void*)1);
REDISMODULE_NOT_USED(timer_id);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
void timerHandlerMaxmemory(RedisModuleCtx *ctx, void *data) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(data);
RedisModuleCallReply *reply = RedisModule_Call(ctx,"SETEX","ccc!","timer-maxmemory-volatile-start","100","1");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "CONFIG", "ccc!", "SET", "maxmemory", "1");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx, "INCR", "c", "timer-maxmemory-middle");
reply = RedisModule_Call(ctx,"SETEX","ccc!","timer-maxmemory-volatile-end","100","1");
RedisModule_FreeCallReply(reply);
}
int propagateTestTimerMaxmemoryCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleTimerID timer_id =
RedisModule_CreateTimer(ctx,100,timerHandlerMaxmemory,(void*)1);
REDISMODULE_NOT_USED(timer_id);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
void timerHandlerEval(RedisModuleCtx *ctx, void *data) {
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(data);
RedisModuleCallReply *reply = RedisModule_Call(ctx,"INCRBY","cc!","timer-eval-start","1");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "EVAL", "cccc!", "redis.call('set',KEYS[1],ARGV[1])", "1", "foo", "bar");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx, "INCR", "c", "timer-eval-middle");
reply = RedisModule_Call(ctx,"INCRBY","cc!","timer-eval-end","1");
RedisModule_FreeCallReply(reply);
}
int propagateTestTimerEvalCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleTimerID timer_id =
RedisModule_CreateTimer(ctx,100,timerHandlerEval,(void*)1);
REDISMODULE_NOT_USED(timer_id);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
/* The thread entry point. */
void *threadMain(void *arg) {
REDISMODULE_NOT_USED(arg);
RedisModuleCtx *ctx = RedisModule_GetThreadSafeContext(NULL);
RedisModule_SelectDb(ctx,9); /* Tests ran in database number 9. */
for (int i = 0; i < 3; i++) {
RedisModule_ThreadSafeContextLock(ctx);
RedisModule_Replicate(ctx,"INCR","c","a-from-thread");
RedisModuleCallReply *reply = RedisModule_Call(ctx,"INCR","c!","thread-call");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx,"INCR","c","b-from-thread");
RedisModule_ThreadSafeContextUnlock(ctx);
}
RedisModule_FreeThreadSafeContext(ctx);
return NULL;
}
int propagateTestThreadCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
pthread_t tid;
if (pthread_create(&tid,NULL,threadMain,NULL) != 0)
return RedisModule_ReplyWithError(ctx,"-ERR Can't start thread");
pthread_detach(tid);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
/* The thread entry point. */
void *threadDetachedMain(void *arg) {
REDISMODULE_NOT_USED(arg);
RedisModule_SelectDb(detached_ctx,9); /* Tests ran in database number 9. */
RedisModule_ThreadSafeContextLock(detached_ctx);
RedisModule_Replicate(detached_ctx,"INCR","c","thread-detached-before");
RedisModuleCallReply *reply = RedisModule_Call(detached_ctx,"INCR","c!","thread-detached-1");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(detached_ctx,"INCR","c!","thread-detached-2");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(detached_ctx,"INCR","c","thread-detached-after");
RedisModule_ThreadSafeContextUnlock(detached_ctx);
return NULL;
}
int propagateTestDetachedThreadCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
pthread_t tid;
if (pthread_create(&tid,NULL,threadDetachedMain,NULL) != 0)
return RedisModule_ReplyWithError(ctx,"-ERR Can't start thread");
pthread_detach(tid);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int propagateTestSimpleCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
/* Replicate two commands to test MULTI/EXEC wrapping. */
RedisModule_Replicate(ctx,"INCR","c","counter-1");
RedisModule_Replicate(ctx,"INCR","c","counter-2");
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int propagateTestMixedCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleCallReply *reply;
/* This test mixes multiple propagation systems. */
reply = RedisModule_Call(ctx, "INCR", "c!", "using-call");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx,"INCR","c","counter-1");
RedisModule_Replicate(ctx,"INCR","c","counter-2");
reply = RedisModule_Call(ctx, "INCR", "c!", "after-call");
RedisModule_FreeCallReply(reply);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int propagateTestNestedCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
RedisModuleCallReply *reply;
/* This test mixes multiple propagation systems. */
reply = RedisModule_Call(ctx, "INCR", "c!", "using-call");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx,"propagate-test.simple", "!");
RedisModule_FreeCallReply(reply);
RedisModule_Replicate(ctx,"INCR","c","counter-3");
RedisModule_Replicate(ctx,"INCR","c","counter-4");
reply = RedisModule_Call(ctx, "INCR", "c!", "after-call");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "INCR", "c!", "before-call-2");
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "keyspace.incr_case1", "c!", "asdf"); /* Propagates INCR */
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "keyspace.del_key_copy", "c!", "asdf"); /* Propagates DEL */
RedisModule_FreeCallReply(reply);
reply = RedisModule_Call(ctx, "INCR", "c!", "after-call-2");
RedisModule_FreeCallReply(reply);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int propagateTestIncr(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
REDISMODULE_NOT_USED(argc);
RedisModuleCallReply *reply;
/* This test propagates the module command, not the INCR it executes. */
reply = RedisModule_Call(ctx, "INCR", "s", argv[1]);
RedisModule_ReplyWithCallReply(ctx,reply);
RedisModule_FreeCallReply(reply);
RedisModule_ReplicateVerbatim(ctx);
return REDISMODULE_OK;
}
int propagateTestVerbatim(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc < 2){
RedisModule_WrongArity(ctx);
return REDISMODULE_OK;
}
long long replicate_num;
RedisModule_StringToLongLong(argv[1], &replicate_num);
/* Replicate the command verbatim for the specified number of times. */
for (long long i = 0; i < replicate_num; i++)
RedisModule_ReplicateVerbatim(ctx);
RedisModule_ReplyWithSimpleString(ctx,"OK");
return REDISMODULE_OK;
}
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
REDISMODULE_NOT_USED(argv);
REDISMODULE_NOT_USED(argc);
if (RedisModule_Init(ctx,"propagate-test",1,REDISMODULE_APIVER_1)
== REDISMODULE_ERR) return REDISMODULE_ERR;
detached_ctx = RedisModule_GetDetachedThreadSafeContext(ctx);
if (RedisModule_SubscribeToKeyspaceEvents(ctx, REDISMODULE_NOTIFY_ALL, KeySpace_NotificationGeneric) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.timer",
propagateTestTimerCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.timer-nested",
propagateTestTimerNestedCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.timer-nested-repl",
propagateTestTimerNestedReplCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.timer-maxmemory",
propagateTestTimerMaxmemoryCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.timer-eval",
propagateTestTimerEvalCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.thread",
propagateTestThreadCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.detached-thread",
propagateTestDetachedThreadCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.simple",
propagateTestSimpleCommand,
"",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.mixed",
propagateTestMixedCommand,
"write",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.nested",
propagateTestNestedCommand,
"write",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.incr",
propagateTestIncr,
"write",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"propagate-test.verbatim",
propagateTestVerbatim,
"write",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}
int RedisModule_OnUnload(RedisModuleCtx *ctx) {
UNUSED(ctx);
if (detached_ctx)
RedisModule_FreeThreadSafeContext(detached_ctx);
return REDISMODULE_OK;
}
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