Aetherance opened a new pull request, #3252:
URL: https://github.com/apache/dubbo-go/pull/3252
### Description
Currently, router configurations in **dubbo-go** can only be updated through
dynamic configuration centers. This PR introduces support for statically
configuring routers through code, eliminating the need for a config center.
---
### Key Changes
1. **StaticConfigSetter Interface**
* Added in `cluster/router/router.go`.
* Allows routers to receive static configs and decide whether to apply
them based on their own logic.
2. **Client Options Integration**
* New options: `WithRouter(…)`, `SetClientRouters(…)`
* Config propagation: `ClientOptions.Routers → ReferenceOptions.Routers →
URL attribute`
3. **Router Chain Injection**
* Added `injectStaticRouters()` and `injectRouterConfig()` in `chain.go`.
* Supports condition matching, application name matching, force/enabled
flags.
4. **Router Implementations**
* **Condition Router**: parses string conditions, applies service/app
scopes, handles force/enabled flags
* **Tag Router**: validates tags, sets proper enabled/valid flags
---
### Usage
```go
ins, _ := dubbo.NewInstance(
dubbo.WithName("demo-consumer"),
dubbo.WithRouter(
router.WithScope(constant.RouterScopeService),
router.WithKey("com.example.HelloService"),
router.WithConditions([]string{
"tag = gray => host = gray-provider",
}),
),
)
```
### Checklist
* [x] Target branch is `develop`
* [x] Local tests passed
* [x] Tests added to verify the feature or fix
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