B4J Question BANano WebSocket Server and WebApp: Errors

[Mashiane]

Hi

I have created a project based on this template.

I updated the BANanoServer.b4xlib as per solution provided here:

[BANano] Server cannot compile

Does anyone know some workaround? Compiler error: src\b4j\example\servercorsfilter.java:115: error: no suitable constructor found for FilterHolder(Class) FilterHolder fh = new FilterHolder((Class

www.b4x.com

My app first attempt is running somewhat.

I am attaching the logs here for more clarity on the issues.

Please help advise.

Thanks in advance for your cooperation.

 

[Mashiane]

27 April...

B4J Logs and web console logs...

 

[alwaysbusy]

probably related to this: https://www.b4x.com/android/forum/threads/jserver-v4-0-based-on-jetty-11.140437/post-889892

jServer 4 sometimes sends empty blobs that can not be parsed to JSON so you have to catch it in the ws file.

Alwaysbusy

 

[Mashiane]

so you have to catch it in the ws file.

Thanks for the advise, dont you want to please guide me through the solution.

I am kinda lost.

 

[Mashiane]

Object should first be initialized (HttpSession).

Connected
java.lang.RuntimeException: java.lang.RuntimeException: Object should first be initialized (HttpSession).
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:140)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:98)
    at anywheresoftware.b4j.object.WebSocketModule$Adapter$ThreadHandler.run(WebSocketModule.java:204)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: Object should first be initialized (HttpSession).
    at anywheresoftware.b4a.AbsObjectWrapper.getObject(AbsObjectWrapper.java:49)
    at anywheresoftware.b4j.object.HttpSessionWrapper.SetAttribute(HttpSessionWrapper.java:78)
    at com.ab.banano.BANano.UpdateFromCacheDebug(Unknown Source)
    at com.ab.banano.BANano.B4JUpdateFromCache(Unknown Source)
    at b4j.example.bananoserver._updatefromcache(bananoserver.java:1582)
    at b4j.example.serverindex._websocket_connected(serverindex.java:102)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:111)
    ... 7 more

SOLUTION

On the SERVER??? class, on sub, WebSocket_Connected

I have added a try catch clause

Try
        ' Lets update the cache with this class
        CacheReport = Main.Server.UpdateFromCache(Me, ws)
        'Log("PageID: " & CacheReport.BANPageID)
        'Log("Comes From Cache:" & CacheReport.ComesFromCache)
        'Log("Is a reconnecting socket: " & CacheReport.IsReconnected)
    Catch
    End Try    'ignore

 

[Mashiane]

BANanoCore.js Blob error

SOLUTION

Dunno.

 

[alwaysbusy]

I created a new project using this template and just started it without any issues (not the CacheReport nor the Blob error). It is impossible for me to guess what goes wrong if used with your library without having a runnable small project that demonstrates the problem.