# BoxAnnounceAsync

Announce a BoxLang event to the global system interceptor service asynchronously.

By default, the event is announced to the global interception service. The return value is a BoxLang CompletableFuture that will be completed when the event has been announced. Available pools are "global" and "request". The request pool is tied to the application listener and is only available during the request lifecycle.

Example:

```
 // Announce globally
 var future = announceAsync( "onRequestStart", { request = request } )

 // Announce to the application request
 var future = announceAsync( "myRequestEvent", { data : myData }, "request" )
 
```

## Method Signature

```
BoxAnnounceAsync(state=[string], data=[struct], poolname=[string])
```

### Arguments

| Argument   | Type     | Required | Description                                                                                                                 | Default  |
| ---------- | -------- | -------- | --------------------------------------------------------------------------------------------------------------------------- | -------- |
| `state`    | `string` | `true`   | The interceptor event to announce: Ex: "onRequestStart", "onRequestEnd", "onError"                                          |          |
| `data`     | `struct` | `false`  | The data struct to send with the event                                                                                      | `{}`     |
| `poolname` | `string` | `false`  | The name of the interceptor pool to announce the event to. Default is "global". Available pools are "global" and "request". | `global` |

## Examples

## Related

* [ApplicationRestart](/boxlang-language/reference/built-in-functions/system/applicationrestart.md)
* [ApplicationStartTime](/boxlang-language/reference/built-in-functions/system/applicationstarttime.md)
* [ApplicationStop](/boxlang-language/reference/built-in-functions/system/applicationstop.md)
* [BoxAnnounce](/boxlang-language/reference/built-in-functions/system/boxannounce.md)
* [BoxAST](/boxlang-language/reference/built-in-functions/system/boxast.md)
* [BoxModuleReload](/boxlang-language/reference/built-in-functions/system/boxmodulereload.md)
* [BoxRegisterInterceptionPoints](/boxlang-language/reference/built-in-functions/system/boxregisterinterceptionpoints.md)
* [BoxRegisterInterceptor](/boxlang-language/reference/built-in-functions/system/boxregisterinterceptor.md)
* [BoxRegisterRequestInterceptor](/boxlang-language/reference/built-in-functions/system/boxregisterrequestinterceptor.md)
* [BoxUnregisterInterceptor](/boxlang-language/reference/built-in-functions/system/boxunregisterinterceptor.md)
* [BoxUnregisterRequestInterceptor](/boxlang-language/reference/built-in-functions/system/boxunregisterrequestinterceptor.md)
* [CallStackGet](/boxlang-language/reference/built-in-functions/system/callstackget.md)
* [CreateGUID](/boxlang-language/reference/built-in-functions/system/createguid.md)
* [CreateObject](/boxlang-language/reference/built-in-functions/system/createobject.md)
* [CreateUUID](/boxlang-language/reference/built-in-functions/system/createuuid.md)
* [DE](/boxlang-language/reference/built-in-functions/system/de.md)
* [DebugBoxContexts](/boxlang-language/reference/built-in-functions/system/debugboxcontexts.md)
* [Dump](/boxlang-language/reference/built-in-functions/system/dump.md)
* [Duplicate](/boxlang-language/reference/built-in-functions/system/duplicate.md)
* [echo](/boxlang-language/reference/built-in-functions/system/echo.md)
* [EncodeForHTML](/boxlang-language/reference/built-in-functions/system/encodeforhtml.md)
* [GetApplicationMetadata](/boxlang-language/reference/built-in-functions/system/getapplicationmetadata.md)
* [GetBaseTagData](/boxlang-language/reference/built-in-functions/system/getbasetagdata.md)
* [GetBaseTagList](/boxlang-language/reference/built-in-functions/system/getbasetaglist.md)
* [GetBaseTemplatePath](/boxlang-language/reference/built-in-functions/system/getbasetemplatepath.md)
* [GetBoxContext](/boxlang-language/reference/built-in-functions/system/getboxcontext.md)
* [GetBoxRuntime](/boxlang-language/reference/built-in-functions/system/getboxruntime.md)
* [GetBoxVersionInfo](/boxlang-language/reference/built-in-functions/system/getboxversioninfo.md)
* [GetClassMetadata](/boxlang-language/reference/built-in-functions/system/getclassmetadata.md)
* [GetComponentList](/boxlang-language/reference/built-in-functions/system/getcomponentlist.md)
* [GetContextRoot](/boxlang-language/reference/built-in-functions/system/getcontextroot.md)
* [GetCurrentTemplatePath](/boxlang-language/reference/built-in-functions/system/getcurrenttemplatepath.md)
* [GetFileFromPath](/boxlang-language/reference/built-in-functions/system/getfilefrompath.md)
* [GetFunctionCalledName](/boxlang-language/reference/built-in-functions/system/getfunctioncalledname.md)
* [GetFunctionList](/boxlang-language/reference/built-in-functions/system/getfunctionlist.md)
* [GetModuleInfo](/boxlang-language/reference/built-in-functions/system/getmoduleinfo.md)
* [GetModuleList](/boxlang-language/reference/built-in-functions/system/getmodulelist.md)
* [GetRequestClassLoader](/boxlang-language/reference/built-in-functions/system/getrequestclassloader.md)
* [GetSemver](/boxlang-language/reference/built-in-functions/system/getsemver.md)
* [GetSystemSetting](/boxlang-language/reference/built-in-functions/system/getsystemsetting.md)
* [GetTempDirectory](/boxlang-language/reference/built-in-functions/system/gettempdirectory.md)
* [GetTickCount](/boxlang-language/reference/built-in-functions/system/gettickcount.md)
* [htmlEditFormat](/boxlang-language/reference/built-in-functions/system/htmleditformat.md)
* [IIF](/boxlang-language/reference/built-in-functions/system/iif.md)
* [Invoke](/boxlang-language/reference/built-in-functions/system/invoke.md)
* [IsInstanceOf](/boxlang-language/reference/built-in-functions/system/isinstanceof.md)
* [JavaCast](/boxlang-language/reference/built-in-functions/system/javacast.md)
* [ObjectDeserialize](/boxlang-language/reference/built-in-functions/system/objectdeserialize.md)
* [ObjectSerialize](/boxlang-language/reference/built-in-functions/system/objectserialize.md)
* [PagePoolClear](/boxlang-language/reference/built-in-functions/system/pagepoolclear.md)
* [Print](/boxlang-language/reference/built-in-functions/system/print.md)
* [Println](/boxlang-language/reference/built-in-functions/system/println.md)
* [RunThreadInContext](/boxlang-language/reference/built-in-functions/system/runthreadincontext.md)
* [SessionInvalidate](/boxlang-language/reference/built-in-functions/system/sessioninvalidate.md)
* [SessionRotate](/boxlang-language/reference/built-in-functions/system/sessionrotate.md)
* [SessionStartTime](/boxlang-language/reference/built-in-functions/system/sessionstarttime.md)
* [Sleep](/boxlang-language/reference/built-in-functions/system/sleep.md)
* [SystemCacheClear](/boxlang-language/reference/built-in-functions/system/systemcacheclear.md)
* [SystemExecute](/boxlang-language/reference/built-in-functions/system/systemexecute.md)
* [SystemOutput](/boxlang-language/reference/built-in-functions/system/systemoutput.md)
* [Throw](/boxlang-language/reference/built-in-functions/system/throw.md)
* [Trace](/boxlang-language/reference/built-in-functions/system/trace.md)
* [URLDecode](/boxlang-language/reference/built-in-functions/system/urldecode.md)
* [URLEncodedFormat](/boxlang-language/reference/built-in-functions/system/urlencodedformat.md)
* [writeDump](/boxlang-language/reference/built-in-functions/system/writedump.md)
* [WriteLog](/boxlang-language/reference/built-in-functions/system/writelog.md)
* [WriteOutput](/boxlang-language/reference/built-in-functions/system/writeoutput.md)


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