未验证 提交 9891217e 编写于 作者: H Heng Du 提交者: GitHub

Merge pull request #972 from Geek-S/patch-2

[RIP-9] format readme, delete useless spaces symbol
...@@ -28,7 +28,7 @@ SQL feature could do some calculation through the properties you put in when sen ...@@ -28,7 +28,7 @@ SQL feature could do some calculation through the properties you put in when sen
------------ ------------
``` ```
## 1. Grammars ## 1.Grammars
RocketMQ only defines some basic grammars to support this feature. You could also extend it easily. RocketMQ only defines some basic grammars to support this feature. You could also extend it easily.
- Numeric comparison, like **>**, **>=**, **<**, **<=**, **BETWEEN**, **=**; - Numeric comparison, like **>**, **>=**, **<**, **<=**, **BETWEEN**, **=**;
...@@ -43,13 +43,13 @@ Constant types are: ...@@ -43,13 +43,13 @@ Constant types are:
- **NULL**, special constant; - **NULL**, special constant;
- Boolean, **TRUE** or **FALSE**; - Boolean, **TRUE** or **FALSE**;
## 2. Usage constraints ## 2.Usage constraints
Only push consumer could select messages by SQL92. The interface is: Only push consumer could select messages by SQL92. The interface is:
``` ```
public void subscribe(finalString topic, final MessageSelector messageSelector) public void subscribe(finalString topic, final MessageSelector messageSelector)
``` ```
## 3. Producer example ## 3.Producer example
You can put properties in message through method putUserProperty when sending. You can put properties in message through method putUserProperty when sending.
```java ```java
...@@ -67,7 +67,7 @@ producer.shutdown(); ...@@ -67,7 +67,7 @@ producer.shutdown();
``` ```
## 4. Consumer example ## 4.Consumer example
Use `MessageSelector.bySql` to select messages through SQL when consuming. Use `MessageSelector.bySql` to select messages through SQL when consuming.
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