EMQ - Shortened Project Name
Adopt a shortened project name: EMQ(Erlang/Enterprise/Elastic MQTT Broker)，E means Erlang/OTP, Enterprise and Elastic.
Improve the Release Management
In order to iterate the project fast, we will adopt a new release management strategy since 2.0. There will be two or three 'Preview Release' named beta1, beta2 or beta3, and then one or two 'Release Candidate' named rc1, rc2 before a Major version is production ready.
Seperate Rel from Application
We split the emqttd 1.x project into two projects since 2.0-beta1 release to resolve the plugins' dependency issue.
A new project named emqttd-relx_ is created and responsible for buiding the emqttd application and the plugins::
git clone https://github.com/emqtt/emqttd-relx.git
cd emqttd-relx && make
cd _rel/emqttd && ./bin/emqttd console
erlang.mk and relx
The rebar which is used in 1.x release is replaced by erlang.mk and relx tools since 2.0-beta1 release.
You can check the 'Makefile' and 'relx.config' in the release project of the borker: emqttd-relx_ .
Improve Git Branch Management
| stable | 1.x Stable Branch |
|---|---|
| master | 2.x Master Branch |
| emq10 | 1.x Developement Branch |
| emq20 | 2.x Development Branch |
| emq30 | 3.x Development Branch |
| issue#{id} | BugFix Branch |
New Config Syntax
Since 2.0-beta1 release the configuration file of the broker and plugins adopt a new syntax like rebar.config and relx.config:
etc/emqttd.conf for example::
%% Max ClientId Length Allowed.
{mqtt_max_clientid_len, 512}.
%% Max Packet Size Allowed, 64K by default.
{mqtt_max_packet_size, 65536}.
%% Client Idle Timeout.
{mqtt_client_idle_timeout, 30}. % Second
MQTT-SN Protocol Plugin
The MQTT-SN Protocol Plugin emqttd_sn_ has been ready in 2.0-beta1 release. The default UDP port of MQTT-SN is 1884.
Load the plugin::
./bin/emqttd_ctl plugins load emqttd_sn
Improve the PubSub Design
.. image:: _static/images/publish.png
Improve the Plugin Management
The plugin of EMQ 2.0 broker is a normal erlang application which depends on and extends 'emqttd'. You can create a standalone plugin application project, and add it to emqttd-relx_ Makefile as a DEP.
All the plugins' config files will be copied to emqttd/etc/plugins/ folder when making emqttd brinary packages in emqttd-relx_ project::
▾ emqttd/
▾ etc/
▸ modules/
▾ plugins/
emqtt_coap.conf
emqttd.conf
emqttd_auth_http.conf
emqttd_auth_mongo.conf
emqttd_auth_mysql.conf
emqttd_auth_pgsql.conf
emqttd_auth_redis.conf
emqttd_coap.conf
emqttd_dashboard.conf
emqttd_plugin_template.conf
emqttd_recon.conf
emqttd_reloader.conf
emqttd_sn.conf
emqttd_stomp.conf