MqMsgque_Main_C_API

MqMsgque PACKAGE - the package-main is a single piece of code evaluated only once at application startup … More...

Collaboration diagram for MqMsgque_Main_C_API:

Functions
void	MqMain (void *code)
	Main entrypoint - start the application

Detailed Description

MqMsgque PACKAGE - the package-main is a single piece of code evaluated only once at application startup …

Example from MyServer.java → The package-main configure the factory and start the server.

package example;

import jvmkkernel.*;
import jvmqmsgque.*;

// package-item
final class MyServer extends MqContextC implements MqServerSetupIF {

  // Factory Constructor
  public MyServer(MqContextC tmpl) {
    super(tmpl);
  }

  // service to serve all incoming requests for token "HLWO"
  class MyFirstCallback implements MqServiceIF {
    public void Callback(MqContextC ctx) {
      SendSTART();
      SendSTR(ReadSTR() + " World");
      SendRETURN();
    }
  }

  // define a service as link between the token "HLWO" and the class "MyFirstService"
  public void ServerSetup() {
    ServiceCreate("HLWO", new MyFirstCallback());
  }

  // -------------------------------------------------------------

  // package-main
  public static void main(String[] argv) {
  
    // create the "MyServer" factory… and return the initial (top) object
    MqContextC srv = MqFactoryC.Add(MyServer.class).New();

    try {
      srv.LinkCreate(argv);
      srv.ProcessEvent(MqWaitOnEventE.FOREVER);
    } catch (Throwable e) {
      srv.ErrorCatch(e);
    }
    srv.Exit();
  }
}

Function Documentation

MqMain()

void MqMain

(

void *

code

)

Main entrypoint - start the application

Tcl has a special requirement, for every new server-thread a new interpreter is created and
this interpreter source the toplevel file for initialization. This file is set on library startup and
can be changed with MqInitResetArg0. The problem is the server startup code from the toplevel. For internal
purpose this code should only be executed on application-startup (like the C main function)
and not for every thread again.