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Modules: handle the conflict of registering commands

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This commit is contained in:
zhaozhao.zz 2017-09-28 16:21:21 +08:00
parent 474adba9fa
commit cb9dde3280
1 changed files with 28 additions and 21 deletions
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49
src/module.c
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@ -615,7 +615,7 @@ int RM_CreateCommand(RedisModuleCtx *ctx, const char *name, RedisModuleCmdFunc c
sds cmdname = sdsnew(name);
/* Check if the command name is busy. */
if (lookupCommand((char*)name) != NULL) {
if (lookupCommand(cmdname) != NULL) {
sdsfree(cmdname);
return REDISMODULE_ERR;
}
@ -3661,6 +3661,28 @@ void moduleFreeModuleStructure(struct RedisModule *module) {
zfree(module);
}
void moduleUnregisterCommands(struct RedisModule *module) {
/* Unregister all the commands registered by this module. */
dictIterator *di = dictGetSafeIterator(server.commands);
dictEntry *de;
while ((de = dictNext(di)) != NULL) {
struct redisCommand *cmd = dictGetVal(de);
if (cmd->proc == RedisModuleCommandDispatcher) {
RedisModuleCommandProxy *cp =
(void*)(unsigned long)cmd->getkeys_proc;
sds cmdname = cp->rediscmd->name;
if (cp->module == module) {
dictDelete(server.commands,cmdname);
dictDelete(server.orig_commands,cmdname);
sdsfree(cmdname);
zfree(cp->rediscmd);
zfree(cp);
}
}
}
dictReleaseIterator(di);
}
/* Load a module and initialize it. On success C_OK is returned, otherwise
* C_ERR is returned. */
int moduleLoad(const char *path, void **module_argv, int module_argc) {
@ -3681,7 +3703,10 @@ int moduleLoad(const char *path, void **module_argv, int module_argc) {
return C_ERR;
}
if (onload((void*)&ctx,module_argv,module_argc) == REDISMODULE_ERR) {
if (ctx.module) moduleFreeModuleStructure(ctx.module);
if (ctx.module) {
moduleUnregisterCommands(ctx.module);
moduleFreeModuleStructure(ctx.module);
}
dlclose(handle);
serverLog(LL_WARNING,
"Module %s initialization failed. Module not loaded",path);
@ -3715,25 +3740,7 @@ int moduleUnload(sds name) {
return REDISMODULE_ERR;
}
/* Unregister all the commands registered by this module. */
dictIterator *di = dictGetSafeIterator(server.commands);
dictEntry *de;
while ((de = dictNext(di)) != NULL) {
struct redisCommand *cmd = dictGetVal(de);
if (cmd->proc == RedisModuleCommandDispatcher) {
RedisModuleCommandProxy *cp =
(void*)(unsigned long)cmd->getkeys_proc;
sds cmdname = cp->rediscmd->name;
if (cp->module == module) {
dictDelete(server.commands,cmdname);
dictDelete(server.orig_commands,cmdname);
sdsfree(cmdname);
zfree(cp->rediscmd);
zfree(cp);
}
}
}
dictReleaseIterator(di);
moduleUnregisterCommands(module);
/* Unregister all the hooks. TODO: Yet no hooks support here. */