Version: 2.4.0

Dubbo Plugin

Explanation

Dubbo is a plugin that converts http protocol into Dubbo protocol and it is also the key for gateway to realize dubbo generic service.
Dubbo plugin needs to cooperate with metadata to realize dubbo calls.
Apache Dubbo and Alibaba Dubbo users both use the same plugin.

Add related dependencies and enable plugin, please refer to: Quick start with Dubbo .
Dubbo client access, please refer to: Dubbo Proxy .
Set selector and rule, please refer to: Selector And Rule Config .

Every dubbo interface method corresponds to a piece of metadata, which can be found in shenyu-admin --> BasicConfig -> Metadata .

AppName: The name of the application to which this piece of metadata belongs.
MethodName: The name of the method that needs to be called.
Path: your http request path.
PathDescribe: Description of the path, for easy viewing.
ParamsType: List of parameter types of dubbo interface, there are two declaration methods here: e.g. we have an interface update(Integer id, String name, Integer age)
- Type list
```
java.lang.Integer,java.lang.String,java.lang.Integer
```
  - According to the order of the parameter types of the interface, separated by ,
  - When requesting to pass parameters, the parameters must be passed in strictly in accordance with the order of the parameter types, if a parameter without value use null as a placeholder.
    
    Request body example: {"id":1,"name": null,"age":18}
- Name mapping
```
{"id":"java.lang.Integer","name":"java.lang.String","age":"java.lang.Integer"}      
```
  - Use "parameter name":"parameter type" to represent a parameter, set in order of interface parameter type, separated by ,
  - No need to pay attention to the order when requesting, and no need to use null placeholders.
    
    Request body example: {"name":"Mike","id":1}
RpcExpand: corresponding to some configurations of dubbo interface; If you want to adjust, please modify here, which support json format like the following fields:

{ "timeout": 10000,"group": "",version":"","loadbalance": "","retries": 1 }