B4J Question How to use a Server Handler written in a library in my code

[FrostCodes]

Hi coders, i wrote a library and i wrapped Jserver inside and wrote my server handlers also there. I tried using this library inside a cli program and to my surprise i got error. Please any suggestion?

cuppifyrouter is my server handler inside the library.

Spoiler: Error

Waiting for debugger to connect...
Program started.
2018-11-28 13:42:58.737:INFO::main: Logging initialized @1288ms to org.eclipse.jetty.util.log.StdErrLog
Error occurred on line: 32 (Main)
java.lang.ClassNotFoundException: b4j.example.cuppifyrouter
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at anywheresoftware.b4j.object.ServerWrapper.Start(ServerWrapper.java:165)
at Punchline.Tech.Cuppify.cuppify._start(cuppify.java:316)
at b4j.example.main._appstart(main.java:125)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:628)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:234)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:168)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:98)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
at b4j.example.main.main(main.java:29)
Program terminated (StartMessageLoop was not called).

 

[Erel]

What is the library package name?

 

[FrostCodes]

Punchline.Tech.Cuppify

 

[Erel]

1. It is a mistake to use non-lower case characters in the package name. You need to change it.

2. Add the package name to the class name when you add the handlers:

srvr.AddHandler("punchline.text.cuppify", False)

 

[FrostCodes]

Thanks , the above did solve my problem but created another.
Inside my library the handler: CuppifyRouter is not able to call an external sub inside a code module using call sub. I tried adding the external package name like

punchline.myapi.MyModule.MyExternalSub this doesn't work also ..

If SubExists("punchline.myapi.MyModule", "MyExternalSub") Then

            CallSub3("punchline.myapi.MyModule", "MyExternalSub", "My First Paremeter", "My Second Parameter")
  
        End If

Please any way about this ?

 

[Daestrum]

Shouldn't the first parameter of SubExists be an Object and not a String?

Dim m As SomeClassModule
' otherCodeModule is a code module in project
…
' class module
If SubExists(m,"someMethod") then
…
' code module
if SubExists(otherCodeModule,"anotherMethod") then 
...

 

[FrostCodes]

Shouldn't the first parameter of SubExists be an Object and not a String?

Dim m As SomeClassModule
' otherCodeModule is a code module in project
…
' class module
If SubExists(m,"someMethod") then
…
' code module
if SubExists(otherCodeModule,"anotherMethod") then
...

I am trying to call a sub dynamically .. thanks but this doesn't solve my problem

 

[Erel]

Why not use the same package name in your library and app?

 

[FrostCodes]

Why not use the same package name in your library and app?

Actually , i wrote a library for B4J i don't know what package name someone using my library might use
but i would try like what you suggested if it work .. i think i can use this as a temporary solution, i can tell developers to also follow that step for now . But if any solution is available please share

 

[FrostCodes]

Hi, i tried using same package name. This doesn't solve my problem. I even tried putting my package name in front like this

   CallSub3("punchline.myapi.MyModule", "MyExternalSub", "My First Paremeter", "My Second Parameter")

same failed result. I think from a server handler one cant call a sub that is external. Because i created another module in the project and tried call my sun then i used in my real app and called that sub and it worked , am i doing something wrong because i need to pass all parameters in the callsub3() dynamically

 

[Daestrum]

This is what I was hinting at with my previous post.
CallSub3 requires an object in the first parameter not a string
If you have a class module then you will have

Dim x As theClass

then CallSub3 would be

CallSub3(x,??,??,??)

If it's a code module then

CallSub3(theCodeModuleName,??,??,??)

 

[Erel]

You need to pass a "callback" object and call it. Don't rely on any specific class name.

 

[FrostCodes]

You need to pass a "callback" object and call it. Don't rely on any specific class name.

yes i tried.. I even reference the module inside a map and tried calling it using the Map data, still failed