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Modules: handle propagation when ctx is freed. Flag modules commands ctx.

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This commit is contained in:
antirez 2019-10-02 18:33:40 +02:00
parent 758b39be99
commit c549513acd
1 changed files with 23 additions and 19 deletions
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42
src/module.c
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@ -158,6 +158,7 @@ typedef struct RedisModuleCtx RedisModuleCtx;
#define REDISMODULE_CTX_BLOCKED_TIMEOUT (1<<4)
#define REDISMODULE_CTX_THREAD_SAFE (1<<5)
#define REDISMODULE_CTX_BLOCKED_DISCONNECTED (1<<6)
#define REDISMODULE_CTX_MODULE_COMMAND_CALL (1<<7)
/* This represents a Redis key opened with RM_OpenKey(). */
struct RedisModuleKey {
@ -519,8 +520,29 @@ int RM_GetApi(const char *funcname, void **targetPtrPtr) {
return REDISMODULE_OK;
}
/* Helper function for when a command callback is called, in order to handle
* details needed to correctly replicate commands. */
void moduleHandlePropagationAfterCommandCallback(RedisModuleCtx *ctx) {
client *c = ctx->client;
/* We don't need to do anything here if the context was never used
* in order to propagate commands. */
if (!(ctx->flags & REDISMODULE_CTX_MULTI_EMITTED)) return;
if (c->flags & CLIENT_LUA) return;
/* Handle the replication of the final EXEC, since whatever a command
* emits is always wrapped around MULTI/EXEC. */
robj *propargv[1];
propargv[0] = createStringObject("EXEC",4);
alsoPropagate(server.execCommand,c->db->id,propargv,1,
PROPAGATE_AOF|PROPAGATE_REPL);
decrRefCount(propargv[0]);
}
/* Free the context after the user function was called. */
void moduleFreeContext(RedisModuleCtx *ctx) {
moduleHandlePropagationAfterCommandCallback(ctx);
autoMemoryCollect(ctx);
poolAllocRelease(ctx);
if (ctx->postponed_arrays) {
@ -536,34 +558,16 @@ void moduleFreeContext(RedisModuleCtx *ctx) {
if (ctx->flags & REDISMODULE_CTX_THREAD_SAFE) freeClient(ctx->client);
}
/* Helper function for when a command callback is called, in order to handle
* details needed to correctly replicate commands. */
void moduleHandlePropagationAfterCommandCallback(RedisModuleCtx *ctx) {
client *c = ctx->client;
if (c->flags & CLIENT_LUA) return;
/* Handle the replication of the final EXEC, since whatever a command
* emits is always wrapped around MULTI/EXEC. */
if (ctx->flags & REDISMODULE_CTX_MULTI_EMITTED) {
robj *propargv[1];
propargv[0] = createStringObject("EXEC",4);
alsoPropagate(server.execCommand,c->db->id,propargv,1,
PROPAGATE_AOF|PROPAGATE_REPL);
decrRefCount(propargv[0]);
}
}
/* This Redis command binds the normal Redis command invocation with commands
* exported by modules. */
void RedisModuleCommandDispatcher(client *c) {
RedisModuleCommandProxy *cp = (void*)(unsigned long)c->cmd->getkeys_proc;
RedisModuleCtx ctx = REDISMODULE_CTX_INIT;
ctx.flags |= REDISMODULE_CTX_MODULE_COMMAND_CALL;
ctx.module = cp->module;
ctx.client = c;
cp->func(&ctx,(void**)c->argv,c->argc);
moduleHandlePropagationAfterCommandCallback(&ctx);
moduleFreeContext(&ctx);
/* In some cases processMultibulkBuffer uses sdsMakeRoomFor to