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.

Plugin Setting

• 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 .

Metadata

• 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

    ```yamljava.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

  ```yaml  {"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 }

• Interface: The fully-qualified name for dubbo interface .

• RpcType: Choose dubbo .