Hi
I'm porting a large desktop MicroFocus application that is currently compiled to gnts onto the Web. I'm using Eclipse 2.2.2 on Windows 10. The app will deployed on a Windows Server 2010 or later.
The old architecture uses a sockets C program, compiled to a dll that was itself called by a compile Cobol gnt.
Here's an extract from the COBOL program that called the sockets.dll
01 W00SOC-REC PIC X(6144).
01 ws-msg PIC X(6145).
string w00soc-rec x"00" delimited by size into ws-msg
call dynamicNTStdCall "sockets" using ws-msg
The other side of the socket connection is a Java program that paints a Gui screen using the passed information at run time.
Gnts needing to use the sockets Cobol program pass W00SOS-REC in linkage.
As far as I can tell there is no native support for sockets on the Web, apparently for security reasons. However there is socket like protocol "Websockets" that is widely supported.
I can install and use Tomcat to deploy a Websockets service on the server side. That part seems fairy straightforward. If anyone is interested please see this link which has very good instructions:
https://examples.javacodegeeks.com/enterprise-java/tomcat/apache-tomcat-websocket-tutorial/
The Java Websockets code reproduced below.
My question is how to create a new JVM Cobol program that can call the Java program and be callable from my native gnts.
I'm assuming it need to be compiled as managed code so that it can call the Java program. The only data mapping that is required is the COBOL string
01 W00SOC-REC PIC X(6144).
I would really appreciate it if anyone could steer me in the right direction or provide help with:
1) links or instructions to setup the Eclipse project for the managed code
2) an example program that passes and receives strings to and from Java
Please let me know if the whole concept is flawed and not possible :)
Thanks in advance
Elliot
Websockets Java code:
package server.ws;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.server.ServerEndpoint;
@ServerEndpoint("/websocketendpoint")
public class WsServer {
@OnOpen
public void onOpen(){
System.out.println("Open Connection ...");
}
@OnClose
public void onClose(){
System.out.println("Close Connection ...");
}
@OnMessage
public String onMessage(String message){
System.out.println("Message from the client: " + message);
String echoMsg = "Echo from the server : " + message;
return echoMsg;
}
@OnError
public void onError(Throwable e){
e.printStackTrace();
}
}
I
