is it possible to add support for retained message expiration?

[sufish]

i know it's not specified by MQTT protocol, but for offline message handling, it will be very useful if message can be set to expire after some time interval.

[emqplus]

@sufish, expired fo all retained messages?

[sufish]

General expiration for pesistented messages, like retained and QoS1,2, offline messages

[berrywira]

same with my problem. +1

[brangi]

+1

[lsxredrain]

if use redis to stroe message ,it is very easy to support for retained message expiration.

[emqplus]

Configure the expiration time in etc/emqttd.config:

        %% Retained messages
        {retained, [
            %% Expired after seconds, never expired if 0
            {expired_after, 0},

            %% Max number of retained messages
            {max_message_num, 100000},

            %% Max Payload Size of retained message
            {max_playload_size, 65536}
        ]},

[emqplus]

@sufish, @brangi, @berrywira. The feature has been merged to the latest master branch. Please check
PR: #329

[berrywira]

Thanks +1