PPT Slide

org.omg.CORBA.Object s1_obj, s2_obj,

uc1_obj, uc2_obj,m1_obj,m2_obj;

GatewayContext uc1, uc2,s1,s2;

//get IOR string from fixed url

String ref = getIORFromURL(masterURL);

//convert IOR to corba object

org.omg.CORBA.Object obj = orb.string_to_object(ref);

//narrow corba Object to specific corba server type

GatewayContext master =

GatewayContextHelper.narrow(obj);

//get the proxy reference of slave server S1

s1_obj = master.getContext(“M/S1”);

s1 = GatewayContextHelper.narrow(s1_obj);

//add new user context with name “uc1”

uc1_obj = s1.addNewContext(“uc1”);

//narrow it to WebFowContext

uc1 = GatewayContextHelper.narrow(uc1_obj);

m1_obj = uc1.addNewModule(“timerModule_1”);

//get the proxy reference of slave server S2

s2_obj = master.getContext(“M/S2”);

s2 = GatewayContextHelper.narrow(s2_obj);

//add new user context with name “uc2”

uc2_obj = s2.addNewContext(“uc2”);

//narrow it to WebFowContext

uc2 = GatewayContextHelper.narrow(uc2_obj);

m2_obj = uc1.addNewModule(“timerModule_2”);

//Finally make “push” type of connection between

//modules M1and M2. Make sure you issue

//the “attachPushEvent” //command to the parent

//of event source where M1 is the source of event.

//uc1.attachPushEvent(m1_obj," timerEventData",

//m2_obj,"targetMethod");

Continued

The sequence of Gateway API calls

to create the above distributed environment which

includes master and two slaves and two modules

and their association