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CommandFilter API: Add unregister option.

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A filter handle is returned and can be used to unregister a filter.  In
the future it can also be used to further configure or manipulate the
filter.

Filters are now automatically unregistered when a module unloads.
This commit is contained in:
Yossi Gottlieb
2019-03-21 14:44:49 +02:00
parent dd8b4be46b
commit e2626f69ec
4 changed files with 126 additions and 32 deletions
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27
src/modules/hellofilter.c
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@ -7,10 +7,27 @@ static RedisModuleString *log_key_name;
static const char log_command_name[] = "hellofilter.log";
static const char ping_command_name[] = "hellofilter.ping";
static const char unregister_command_name[] = "hellofilter.unregister";
static int in_module = 0;
static RedisModuleCommandFilter *filter = NULL;
int HelloFilter_UnregisterCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
(void) argc;
(void) argv;
RedisModule_ReplyWithLongLong(ctx,
RedisModule_UnregisterCommandFilter(ctx, filter));
return REDISMODULE_OK;
}
int HelloFilter_PingCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
{
(void) argc;
(void) argv;
RedisModuleCallReply *reply = RedisModule_Call(ctx, "ping", "c", "@log");
if (reply) {
RedisModule_ReplyWithCallReply(ctx, reply);
@ -115,11 +132,15 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,ping_command_name,
HelloFilter_PingCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
HelloFilter_PingCommand,"deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if (RedisModule_RegisterCommandFilter(ctx, HelloFilter_CommandFilter)
== REDISMODULE_ERR) return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,unregister_command_name,
HelloFilter_UnregisterCommand,"write deny-oom",1,1,1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
if ((filter = RedisModule_RegisterCommandFilter(ctx, HelloFilter_CommandFilter))
== NULL) return REDISMODULE_ERR;
return REDISMODULE_OK;
}