15d048d8ec
Given following Rule SQL:
```
select
subbits(payload, 1, 8) as firstByte,
case
when firstByte = 123 then 't/{'
when firstByte = 125 then 't/}'
else 't/' + str(firstByte)
end as tp
from "t/#"
```
Input Payload: `{x}`
Output: `{"tp": "t/{", "firstByte": 123}`
Input Payload: `}x`
Output: `{"tp": "t/}", "firstByte": 125}`
Input Payload: `a`
Output: `{"tp": "t/97", "firstByte": 97}`
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| README.md | ||
| rebar.config | ||
emqx-rule-engine
IoT Rule Engine for EMQ X Broker.
Concept
iot rule "Rule Name"
when
match TopicFilters and Conditions
select
para1 = val1
para2 = val2
then
take action(#{para2 => val1, #para2 => val2})
Architecture
|-----------------|
Pub ---->| Message Routing |----> Sub
|-----------------|
| /|\
\|/ |
|-----------------|
| Rule Engine |
|-----------------|
| |
Backends Services Bridges
SQL for Rule query statement
select id, time, temperature as t from "topic/a" where t > 50;
License
Copyright (c) 2019 EMQ Technologies Co., Ltd. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");you may not use this file except in compliance with the License.You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.