reventjs

Revent

Redis pub/sub module for NodeJS

Install

npm i reventjs --save

Config

{
host: /* Redis host */,
port: /* Redis port */,
db:   /* Redis DB connect */,
options: {/* Redis options */},
createClient: /* Redis client instance */,
messagePattern: /* Message pattern RexExp*/
}

Usage

Subscribe

import Revent  from 'reventjs';
const redis = Revent.create({/* config */});
 
redis
.on('ready', () => {
 
    redis.on('hello:*', ['expired','del' ,(data, channel, pattern) => {
        console.log(data, channel, pattern);
    }]);
 
})
.on('error', (err) => {
  console.error(`Redis client error: ${err}`);
});
 
// OR
redis
.on('ready', () => {
  console.log('Redis ready');
})
.on('error', (err) => {
  console.error(`Redis client error: ${err}`);
});
 
redis.on('hello:*', ['expired','del' ,(data, channel, pattern) => {
  console.log(data, channel, pattern);
}]);

Unsubscribe

// space - Keyspace
redis.off('hello:* world:*',[() => {
  console.log('unsubscribe hello:*');
}]);
 
// event - Keyevent
redis.off('events',[() => {
  console.log('unsubscribe Events');
}]);
 

Publish

redis.send('hello:*', {name:'Peter'});

Connection close

redis.close();
 
//Hard
redis.end();

Redis command

redis.command().expire(`hello:123`, 0, (err, reply) => {
    if(err || !reply) {
        console.error(err);
    }
});

Important

Do not forget to set up Redis and add to redis.conf line:

--notify-keyspace-events <options>

• K Keyspace events, published with keyspace@ prefix.
• E Keyevent events, published with keyevent@ prefix.
• g Generic commands (non-type specific) like DEL, EXPIRE, RENAME, ...
• $ String commands
• l List commands
• s Set commands
• h Hash commands
• z Sorted set commands
• x Expired events (events generated every time a key expires)
• e Evicted events (events generated when a key is evicted for maxmemory)
• A Alias for g$lshzxe, so that the "AKE" string means all the events.

It is also possible to use the. view

Dear friends, if you find any bugs or you will have suggestions, I'll tell you thanks very much. And you plus one in karma;)