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Module hooks: fixes and an example module.

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This commit is contained in:
antirez 2019-10-22 13:26:29 +02:00
parent 94c50314f1
commit cf52e0ad44
4 changed files with 70 additions and 2 deletions
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1
src/module.c
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@ -5769,6 +5769,7 @@ void moduleFireServerEvent(uint64_t eid, int subid, void *data) {
if (eid == REDISMODULE_EVENT_CLIENT_CHANGE) {
modulePopulateClientInfoStructure(&civ1,data,
el->event.dataver);
moduledata = &civ1;
}
el->callback(&ctx,el->event,subid,moduledata);
moduleFreeContext(&ctx);

8
src/modules/Makefile
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@ -13,7 +13,7 @@ endif
.SUFFIXES: .c .so .xo .o
all: helloworld.so hellotype.so helloblock.so testmodule.so hellocluster.so hellotimer.so hellodict.so
all: helloworld.so hellotype.so helloblock.so testmodule.so hellocluster.so hellotimer.so hellodict.so hellohook.so
.c.xo:
$(CC) -I. $(CFLAGS) $(SHOBJ_CFLAGS) -fPIC -c $< -o $@
@ -46,6 +46,12 @@ hellotimer.so: hellotimer.xo
hellodict.xo: ../redismodule.h
hellodict.so: hellodict.xo
$(LD) -o $@ $< $(SHOBJ_LDFLAGS) $(LIBS) -lc
hellohook.xo: ../redismodule.h
hellohook.so: hellohook.xo
$(LD) -o $@ $< $(SHOBJ_LDFLAGS) $(LIBS) -lc
testmodule.xo: ../redismodule.h

60
src/modules/hellohook.c Normal file
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@ -0,0 +1,60 @@
/* Server hooks API example
*
* -----------------------------------------------------------------------------
*
* 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.
*/
#define REDISMODULE_EXPERIMENTAL_API
#include "../redismodule.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
/* Client state change callback. */
void clientChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
{
REDISMODULE_NOT_USED(ctx);
RedisModuleClientInfo *ci = data;
printf("Client event for client #%llu %s:%d\n",ci->id,ci->addr,ci->port);
}
/* 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,"hellohook",1,REDISMODULE_APIVER_1)
== REDISMODULE_ERR) return REDISMODULE_ERR;
RedisModule_SubscribeToServerEvent(ctx,
RedisModuleEvent_ClientChange, clientChangeCallback);
return REDISMODULE_OK;
}

3
src/redismodule.h
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@ -178,7 +178,7 @@ typedef struct RedisModuleEvent {
} RedisModuleEvent;
struct RedisModuleCtx;
typedef int (*RedisModuleEventCallback)(struct RedisModuleCtx *ctx, RedisModuleEvent eid, uint64_t subevent, void *data);
typedef void (*RedisModuleEventCallback)(struct RedisModuleCtx *ctx, RedisModuleEvent eid, uint64_t subevent, void *data);
static RedisModuleEvent
RedisModuleEvent_ReplicationRoleChanged = {
@ -299,6 +299,7 @@ typedef struct RedisModuleTypeMethods {
typedef struct RedisModuleClientInfo {
uint64_t version; /* Version of this structure for ABI compat. */
uint64_t flags; /* REDISMODULE_CLIENTINFO_FLAG_* */
uint64_t id; /* Client ID. */
char addr[46]; /* IPv4 or IPv6 address. */
uint16_t port; /* TCP port. */
uint16_t db; /* Selected DB. */