Redis 有人在等消息
我正在使用HiredisC库连接到redis服务器。我不知道如何在订阅新邮件后等待新邮件 我的代码如下所示:Redis 有人在等消息,redis,hiredis,Redis,Hiredis,我正在使用HiredisC库连接到redis服务器。我不知道如何在订阅新邮件后等待新邮件 我的代码如下所示: signal(SIGPIPE, SIG_IGN ); struct event_base *base = event_base_new(); redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379); if (c->err) { /* Let *c leak for now... */ pr
signal(SIGPIPE, SIG_IGN );
struct event_base *base = event_base_new();
redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379);
if (c->err) {
/* Let *c leak for now... */
printf("Error: %s\n", c->errstr);
return 1;
}
redisLibeventAttach(c, base);
redisAsyncSetConnectCallback(c, connectCallback);
redisAsyncSetDisconnectCallback(c, disconnectCallback);
redisAsyncCommand(c, NULL, NULL, "SET key %b", argv[argc - 1],
strlen(argv[argc - 1]));
redisAsyncCommand(c, getCallback, (char*) "end-1", "GET key");
redisAsyncCommand(c, getCallback, (char*) "end-1", "SUBSCRIBE foo");
现在,如何告诉hiredis在频道上等待消息?您不必告诉hiredis您需要在频道上等待:事件循环将只在先前已注册的Redis连接上等待 下面是一个完整的示例:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "hiredis.h"
#include "async.h"
#include "adapters/libevent.h"
void subCallback(redisAsyncContext *c, void *r, void *priv) {
redisReply *reply = r;
if (reply == NULL) return;
if ( reply->type == REDIS_REPLY_ARRAY && reply->elements == 3 ) {
if ( strcmp( reply->element[0]->str, "subscribe" ) != 0 ) {
printf( "Received[%s] channel %s: %s\n",
(char*)priv,
reply->element[1]->str,
reply->element[2]->str );
}
}
}
void connectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Connected...\n");
}
void disconnectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Disconnected...\n");
}
int main (int argc, char **argv) {
signal(SIGPIPE, SIG_IGN);
struct event_base *base = event_base_new();
redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379);
if (c->err) {
/* Let *c leak for now... */
printf("Error: %s\n", c->errstr);
return 1;
}
redisLibeventAttach(c,base);
redisAsyncSetConnectCallback(c,connectCallback);
redisAsyncSetDisconnectCallback(c,disconnectCallback);
redisAsyncCommand(c, subCallback, (char*) "sub", "SUBSCRIBE foo");
event_base_dispatch(base);
return 0;
}
event_base_dispatch函数实际启动事件循环,并使其等待Redis订阅。基于LibUV的解决方案
Redis版本:5.0.5
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "hiredis.h"
#include "async.h"
#include <time.h>
#include <uv.h>
#include "adapters/libevent.h"
#include "adapters/libuv.h"
void subCallback(redisAsyncContext *c, void *r, void *priv) {
redisReply *reply = r;
time_t seconds;
seconds = time(NULL);
if (reply == NULL) return;
if (reply->type == REDIS_REPLY_ARRAY && reply->elements == 3) {
if (strcmp(reply->element[0]->str, "subscribe") != 0) {
printf("[%d] Received[%s] channel %s: %s\n",
seconds,
(char *) priv,
reply->element[1]->str,
reply->element[2]->str);
}
}
}
void connectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Connected...\n");
}
void disconnectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Disconnected...\n");
}
int main(int argc, char **argv) {
signal(SIGPIPE, SIG_IGN);
uv_loop_t *loop = malloc(sizeof(uv_loop_t));
uv_loop_init(loop);
redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379);
if (c->err) {
/* Let *c leak for now... */
printf("Error: %s\n", c->errstr);
return 1;
}
redisLibuvAttach(c, loop);
redisAsyncSetConnectCallback(c, connectCallback);
redisAsyncSetDisconnectCallback(c, disconnectCallback);
redisAsyncCommand(c, subCallback, (char *) "sub", "SUBSCRIBE test-channel");
uv_run(loop, UV_RUN_DEFAULT);
uv_loop_close(loop);
free(loop);
return 0;
}
#包括
#包括
#包括
#包括
#包括“hiredis.h”
#包括“async.h”
#包括
#包括
#包括“adapters/libevent.h”
#包括“适配器/libuv.h”
void子回调(redisyncContext*c、void*r、void*priv){
redisReply*reply=r;
时间t秒;
秒=时间(空);
if(reply==NULL)返回;
if(reply->type==REDIS\u reply\u数组&&reply->elements==3){
if(strcmp(回复->元素[0]->str,“订阅”)!=0){
printf(“[%d]收到[%s]通道%s:%s\n”,
秒,
(char*)priv,
回复->元素[1]->str,
回复->元素[2]->str);
}
}
}
void connectCallback(const redisyncContext*c,int status){
如果(状态!=REDIS_OK){
printf(“错误:%s\n”,c->errstr);
返回;
}
printf(“已连接…\n”);
}
void disconnectCallback(const redisyncContext*c,int status){
如果(状态!=REDIS_OK){
printf(“错误:%s\n”,c->errstr);
返回;
}
printf(“断开连接…\n”);
}
int main(int argc,字符**argv){
信号(信号管、信号灯);
uv_loop_t*loop=malloc(sizeof(uv_loop_t));
uv_loop_init(循环);
redisAsyncContext*c=redisAsyncConnect(“127.0.0.1”,6379);
如果(c->err){
/*现在让*c泄漏*/
printf(“错误:%s\n”,c->errstr);
返回1;
}
redisLibuvAttach(c,循环);
redisAsyncSetConnectCallback(c,connectCallback);
redisAsyncSetDisconnectCallback(c,disconnectCallback);
redisyncCommand(c,subCallback,(char*)“sub”,“订阅测试通道”);
uv_运行(循环,uv_运行默认值);
uv_回路_闭合(回路);
自由(循环);
返回0;
}
这对我不起作用。当我发表这篇文章的时候,我没有得到任何信息,这正是不起作用的。将libevent示例转换为libuv示例不是问题所在。上述代码不会从
redis cli
接收发布到test channel
的消息。您可以提供的任何其他详细信息?本地主机上的服务器(以及在不同主机上测试时使用--protect mode no)。两个独立的redis cli
。我可以在这些cli之间无问题地发布和订阅。当我如上所述启动应用程序时,服务器(以--loglevel debug启动)显示连接。当我在redis cli的其中一个上进行发布时,另一个cli会得到它,但上面的应用程序不会。我在所有地方都中断了,uv循环运行得很好。。只是管道中没有消息。您介意提供redis版本吗?6.0.10。使用redis树中包含的hiredis。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "hiredis.h"
#include "async.h"
#include <time.h>
#include <uv.h>
#include "adapters/libevent.h"
#include "adapters/libuv.h"
void subCallback(redisAsyncContext *c, void *r, void *priv) {
redisReply *reply = r;
time_t seconds;
seconds = time(NULL);
if (reply == NULL) return;
if (reply->type == REDIS_REPLY_ARRAY && reply->elements == 3) {
if (strcmp(reply->element[0]->str, "subscribe") != 0) {
printf("[%d] Received[%s] channel %s: %s\n",
seconds,
(char *) priv,
reply->element[1]->str,
reply->element[2]->str);
}
}
}
void connectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Connected...\n");
}
void disconnectCallback(const redisAsyncContext *c, int status) {
if (status != REDIS_OK) {
printf("Error: %s\n", c->errstr);
return;
}
printf("Disconnected...\n");
}
int main(int argc, char **argv) {
signal(SIGPIPE, SIG_IGN);
uv_loop_t *loop = malloc(sizeof(uv_loop_t));
uv_loop_init(loop);
redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379);
if (c->err) {
/* Let *c leak for now... */
printf("Error: %s\n", c->errstr);
return 1;
}
redisLibuvAttach(c, loop);
redisAsyncSetConnectCallback(c, connectCallback);
redisAsyncSetDisconnectCallback(c, disconnectCallback);
redisAsyncCommand(c, subCallback, (char *) "sub", "SUBSCRIBE test-channel");
uv_run(loop, UV_RUN_DEFAULT);
uv_loop_close(loop);
free(loop);
return 0;
}