feat : add script routing functionality

[YarBor]

JS Standard

• The expect to recv js-script data is like:

  (function route(invokers, invocation, context) {
  var result = [];
  for (var i = 0; i < invokers.length; i++) {
      if ("127.0.0.1" === invokers[i].GetURL().Ip) {
          if (invokers[i].GetURL().Port !== "20000") {
              invokers[i].GetURL().Ip = "anotherIP"
              result.push(invokers[i]);
          }
      }
  }
  return result;
  }(invokers, invocation, context));

• The expected way to return value is like:

    var result = [];
    result.push(invokers[i]);
    return result;

---

• Supports method calling. Parameter methods are mapped by the passed in type. The called method first letter is capitalized (does not comply with js specifications).

e.g. invokers[i].GetURL().SetParam("testKey","testValue")

---

• Like the Go language, it supports direct access to exportable variables within parameters.

e.g. invokers[i].GetURL().Port

---

• publish config like :

  
  scriptRouteConfig := data, err := os.ReadFile(pathToConfigfile)
  conf, _ := config.GetRootConfig().ConfigCenter.GetDynamicConfiguration()
  _ = conf.PublishConfig("dubbo.io"+constant.ScriptRouterRuleSuffix, "dubbo", scriptRouteConfig)

  - config file like :
```yaml
configVersion: v3.0
key: dubbo.io
type: javascript
enabled: true
script: |
  (function route(invokers,invocation,context) {
    var result = [];
    for (var i = 0; i < invokers.length; i++) {
        if ("10.30.0.218" === invokers[i].GetURL().Ip) {
            if (invokers[i].GetURL().Port === "20000"){
                invokers[i].GetURL().Port = "20001" 
                result.push(invokers[i]);
            }
        }
    }
    return result;
  }(invokers,invocation,context));

---

Important

In the js-support.

1. Input args are invokers, invocation, context, The following methods are not allowed.
   • invokers.Invoke(...)
   • invokers.Destroy()
   • invokers.IsAvailable() will always return true
2. Wrong input is program acceptable, it will not return an error or go panic , it will make an undefined error. for example:

   (function route(invokers, invocation, context) {
     var result = [];
     for (var i = 0; i < invokers.length; i++) {
         if ("127.0.0.1" === invokers[i].GetURL().Ip) {
             if (invokers[i].GetURL(" Err Here ").Port !== "20000") {
   //---------------------------------^  here wont go err , it will trans to ()
                 invokers[i].GetURL().Ip = "anotherIP"
                 result.push(invokers[i]);
             }
         }
     }
     return result;
   }(invokers, invocation, context));

   (function route(invokers, invocation, context) {
     var result = [];
     for (var i = 0; i < invokers.length; i++) {
         if ("127.0.0.1" === invokers[i].GetURL().Ip) {
             if (invokers[i].GetURL(" Err Here ").Port !== "20000") {
                 invokers[i].GetURL().AddParam( null , "key string", "value string")
   //---------------------------------------------^  here wont make err , it will trans to ("" , "key string" , "value string")
                 result.push(invokers[i]);
             }
         }
     }
     return result;
   }(invokers, invocation, context));

   (function route(invokers, invocation, context) {
     var result = [];
     for (var i = 0; i < invokers.length; i++) {
         if ("127.0.0.1" === invokers[i].GetURL().Ip) {
             if (invokers[i].GetURL(" Err Here ").Port !== "20000") {
                 invokers[i].GetURL().AddParam( invocation , "key string", "value string")
   //---------------------------------------------^  here wont make err , it will trans to ("[object Object]" , "key string" , "value string")
                 result.push(invokers[i]);
             }
         }
     }
     return result;
   }(invokers, invocation, context));

3. Wrong methods-call will go error. for example:

   (function route(invokers, invocation, context) {
     var result = [];
     for (var i = 0; i < invokers.length; i++) {
         if ("127.0.0.1" === invokers[i].GetURL().Ip) {
             if (invokers[i].GetURLS(" Err Here ").Port !== "20000") {
   //--------------------------^ // here will make err 
                 invokers[i].GetURLS().Ip = "anotherIP"
                 result.push(invokers[i]);
             }
         }
     }
     return result;
   }(invokers, invocation, context));

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 21.18644% with 93 lines in your changes are missing coverage. Please review.

Project coverage is 47.21%. Comparing base (2f5143a) to head (5b51cc0). Report is 17 commits behind head on main.

:exclamation: Current head 5b51cc0 differs from pull request most recent head a650f8a

Please upload reports for the commit a650f8a to get more accurate results.

Files	Patch %	Lines
cluster/router/script/instance/js_instance.go	2.94%	65 Missing and 1 partial :warning:
cluster/router/script/instance/instances_pool.go	47.36%	20 Missing :warning:
common/url.go	41.66%	5 Missing and 2 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2669 +/- ## ========================================== - Coverage 47.38% 47.21% -0.17% ========================================== Files 341 343 +2 Lines 25122 25286 +164 ========================================== + Hits 11904 11940 +36 - Misses 12074 12188 +114 - Partials 1144 1158 +14 ```

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[chickenlj]

1. 监听的规则 key 应该是 provider 应用名，而不是当前进程自身应用名。可参考 tagrouter 的 notify 方法
2. 第1个逻辑改了后，Script Instance 实例的对应关系也要改一下，当前是全局共享的
3. 要确认下 dynamicconfuguration.AddListener() 的逻辑对不对（zookeeper/nacos），因为有多个 ScriptRouter 实例可能对应到一个 key (provider应用名)，dynamicconfuguration.AddListener()应该支持调用多次且记录多个listener --- zookeeper实现看起来没问题，nacos实现好像有问题。
4. instance.Compile 并发调用有没有问题

[sonarcloud[bot]]

Quality Gate passed

Issues
9 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
1.4% Duplication on New Code

See analysis details on SonarCloud