Method argument configuration. The corresponding class：org.apache.dubbo.config.ArgumentConfig. This tag is child of <dubbo:method>, which is for feature description of method argument, such as:
<dubbo:method name="findXxx" timeout="3000" retries="2">
<dubbo:argument index="0" callback="true" />
</dubbo:method>
| Property | Corresponding URL parameter | Type | Requisite | Default | Effect | Description | Compatibility |
|---|---|---|---|---|---|---|---|
| index | int | Y | identification | method name | above 2.0.6 | ||
| type | String | Index and type choose one | identification | Find index of argument by it | above 2.0.6 | ||
| callback | <metodName><index>.retries | boolean | N | service governance | Mark whether this argument is a callback service. If true, provider will generate reverse proxy,which can invoke consumer in turn. Generally for event pushing | above 2.0.6 |