Explanation regarding terms and code

Question

hi
     i am new to webdynpro for java, i cant understant the terms used in the below coding.
1. wdcontext
2. iwdmessagemanager
etc, can any one explain me in detail wats happening in the below code.
Request_SendEmail requestMO = wdContext.currentRequest_SendEmailElement().modelObject();
requestMO.wdSetInvocationLogEnabled( logger.beDebug() ? true : false);
try {
// call Email Web Service and update dependent // model node 'Response'
wdContext.currentRequest_SendEmailElement() .modelObject().execute();
wdContext.nodeResponse().invalidate();
BigDecimal returnCode =
wdContext.currentSendEmailResponseElement().getReturnCode();
String msg = "Email Web Service returned " + returnCode.toString();
if (returnCode.intValue() == 0) {
msgMgr.reportSuccess("Your email was successfully sent (" + msg + ")!");
} else {
msgMgr.reportWarning(
"Your email was not successfully sent (" + msg + ")!");
} catch (CMIException ex) {
msgMgr.reportException(ex.getLocalizedMessage(), true);
this.logWSInvocation(requestMO, ex);
//@@end
thanks in advance
rick

Answer 1

Hi ricky,
According to ur program
context is a virtual memory it is used to store value of the ui element.
iwdmessagemanager is used to print some error messages from message pool(or)if we want to know the values we can use that as print statemant like (Sys.out.print) in java(report success is used for that)
//creating model object for Request_SendEmail
Request_SendEmail requestMO = wdContext.currentRequest_SendEmailElement().modelObject();
//ur checking beDebug()method is true or false according to that InvocationLogEnabled value is set.
requestMO.wdSetInvocationLogEnabled( logger.beDebug() ? true : false);
try {
// call Email Web Service and update dependent // model node 'Response'
//here ur executing the model so that the values r initilized.
wdContext.currentRequest_SendEmailElement() .modelObject().execute();
//invalidate() is used to clear the values.that is ur clearing the response node values.
wdContext.nodeResponse().invalidate();
//here ur accessing SendEmailResponse ReturnCode that is to be stored as  BigDecimal type.
BigDecimal returnCode =
wdContext.currentSendEmailResponseElement().getReturnCode();
//ur adding returnCode value to the string
String msg = "Email Web Service returned " + returnCode.toString();
//According to the return code ur printing messages whether it is successful or not.
if (returnCode.intValue() == 0) {
msgMgr.reportSuccess("Your email was successfully sent (" + msg + ")!");
} else {
msgMgr.reportWarning(
"Your email was not successfully sent (" + msg + ")!");
} catch (CMIException ex) {
msgMgr.reportException(ex.getLocalizedMessage(), true);
this.logWSInvocation(requestMO, ex);
//@@end