Academic Tutorials



English | French | Portugese | German | Italian
Home Advertise Payments Recommended Websites Interview Questions FAQs
News Source Codes E-Books Downloads Jobs Web Hosting
Chats

ILU
Ilu Introduction
ILU Fixing the Implementation
ILU ISL Types
ILU Info
ILU with ANSI C
ILU with Java
ILU Exceptions
ILU OMG IDL
ILU General Info
ILU with Java Part - 2
ILU with Python
ILU Network Service
ILU OMG IDL Part - 2
ILU with Python - Part 2
ILU with Python - Part 3

HTML Tutorials
HTML Tutorial
XHTML Tutorial
CSS Tutorial
TCP/IP Tutorial
CSS 1.0
CSS 2.0
HLML
XML Tutorials
XML Tutorial
XSL Tutorial
XSLT Tutorial
DTD Tutorial
Schema Tutorial
XForms Tutorial
XSL-FO Tutorial
XML DOM Tutorial
XLink Tutorial
XQuery Tutorial
XPath Tutorial
XPointer Tutorial
RDF Tutorial
SOAP Tutorial
WSDL Tutorial
RSS Tutorial
WAP Tutorial
Web Services Tutorial
Browser Scripting
JavaScript Tutorial
VBScript Tutorial
DHTML Tutorial
HTML DOM Tutorial
WMLScript Tutorial
E4X Tutorial
Server Scripting
ASP Tutorial
PERL Tutorial
SQL Tutorial
ADO Tutorial
CVS
Python
Apple Script
PL/SQL Tutorial
SQL Server
PHP
.NET (dotnet)
Microsoft.Net
ASP.Net
.Net Mobile
C# : C Sharp
ADO.NET
VB.NET
VC++
Multimedia
SVG Tutorial
Flash Tutorial
Media Tutorial
SMIL Tutorial
Photoshop Tutorial
Gimp Tutorial
Matlab
Gnuplot Programming
GIF Animation Tutorial
Scientific Visualization Tutorial
Graphics
Web Building
Web Browsers
Web Hosting
W3C Tutorial
Web Building
Web Quality
Web Semantic
Web Careers
Weblogic Tutorial
SEO
Web Site Hosting
Domain Name
Java Tutorials
Java Tutorial
JSP Tutorial
Servlets Tutorial
Struts Tutorial
EJB Tutorial
JMS Tutorial
JMX Tutorial
Eclipse
J2ME
JBOSS
Programming Langauges
C Tutorial
C++ Tutorial
Visual Basic Tutorial
Data Structures Using C
Cobol
Assembly Language
Mainframe
Forth Programming
Lisp Programming
Pascal
Delphi
Fortran
OOPs
Data Warehousing
CGI Programming
Emacs Tutorial
Gnome
ILU
Soft Skills
Communication Skills
Time Management
Project Management
Team Work
Leadership Skills
Corporate Communication
Negotiation Skills
Database Tutorials
Oracle
MySQL
Operating System
BSD
Symbian
Unix
Internet
IP-Masquerading
IPC
MIDI
Software Testing
Testing
Firewalls
SAP Module
ERP
ABAP
Business Warehousing
SAP Basis
Material Management
Sales & Distribution
Human Resource
Netweaver
Customer Relationship Management
Production and Planning
Networking Programming
Corba Tutorial
Networking Tutorial
Microsoft Office
Microsoft Word
Microsoft Outlook
Microsoft PowerPoint
Microsoft Publisher
Microsoft Excel
Microsoft Front Page
Microsoft InfoPath
Microsoft Access
Accounting
Financial Accounting
Managerial Accounting
Network Sites


Using OMG IDL With ILU


Previoushome Next






Using OMG IDL with ILU


ILU also supports the use of the interface definition language OMG IDL, defined by the Object Management Group (OMG) for their Common Object Request Broker Architecture (CORBA).

A D V E R T I S E M E N T
OMG IDL uses a C++-like syntax, so it may be easier for Java and C++ programmers to use than ILU ISL. Unfortunately, CORBA doesn't include some of the concepts in ILU, such as garbage collection for transient objects, or OPTIONAL types, so not every ILU interface can be expressed in OMG IDL, but many of them can. For example, here is the OMG IDL version of the Tutorial interface:
module Tutorial {

  exception DivideByZero {};

  interface Calculator {
    // Set the value of the calculator to `v'
    void SetValue (in double v);
    // Return the value of the calculator
    double GetValue ();
    // Adds `v' to the calculator's value
    void Add (in double v);
    // Subtracts `v' from the calculator's value
    void Subtract (in double v);
    // Multiplies the calculator's value by `v'
    void Multiply (in double v);
    // Divides the calculator's value by `v'
    void Divide (in double v) raises (DivideByZero);
  };

  interface Factory {
    // Create and return an instance of a Calculator object
    Calculator CreateCalculator();
  };
};

This can be used with the java-stubber:

 

% java-stubber Tutorial.idl
writing file javastubs/Tutorial/DivideByZero.java
writing file javastubs/Tutorial/Factory.java
writing file javastubs/Tutorial/FactoryStub.java
writing file javastubs/Tutorial/Calculator.java
writing file javastubs/Tutorial/CalculatorStub.java
% 

This will be a bit slower than running the java-stubber on the equivalent ISL file, as the program works by converting the OMG IDL into ISL, then compiling from the ISL description. OMG IDL interfaces can be checked by running the OMG IDL-to-ILU ISL converter, idl2isl, directly:

 

% idl2isl Tutorial.idl
INTERFACE Tutorial;

EXCEPTION DivideByZero;
TYPE Calculator = OBJECT OPTIONAL
        METHODS
                SetValue (v : REAL),
                GetValue () : REAL,
                Add (v : REAL),
                Subtract (v : REAL),
                Multiply (v : REAL),
                Divide (v : REAL)
                        RAISES DivideByZero END
        END;
TYPE Factory = OBJECT OPTIONAL
        METHODS
                CreateCalculator () : Calculator
        END;
% 

You will notice that the ISL interface generated by idl2isl is a bit different, in that the object type modifier OPTIONAL is used in the description of the Calculator and Factory types. This is because CORBA has the notion that any object type instance passed as a parameter or return value (or field in an array, or element of a sequence, etc.) may be null, instead of being a valid instance pointer. Thus, when working with OMG IDL descriptions of your interfaces, it is necessary to check the return type of methods like Tutorial.Factory.CreateCalculator to see that a valid object reference has been returned, before using the object. ISL allows you to have these CORBA-style objects, by using the OPTIONAL modifier in the declaration of an object type, but it also allows object pointers which can't be null. By default ILU object instances may not be null.

 

Transient and Permanent Objects


Keen-eyed readers will have seen that the Calculator type in `Tutorial.isl' is marked with the modifier COLLECTIBLE, while the Factory type is not. ILU differentiates between two kinds of objects, which we call transient and permanent.

Transient objects are typically created for a specific use, and typically have a fixed lifetime. They often have state associated with them. They are frequently used to represent some ongoing computation or operation.

Permanent objects are usually expected to be around forever (or until some activity not captured by a programming concept terminates). Permanent objects are often gateways to some sort of service, or represent some external piece of data, such as a cell in a spreadsheet, or a file on a disk somewhere. They are often stateless; when they do have state, it is typically backed by some form of stable storage, as they have to be available across crashes of their server program.

ILU provides an automatic system for distributed garbage collection of transient objects; that is, of removing them from everyone's address space when everyone is done with them. This uses the underlying garbage collection techniques of the particular programming language being used. With Java, the ILU garbage collector works in conjunction with the Java collector; with ANSI C, we use the extremely primitive collector provided for C; that is, when the process terminates, the objects are collected. To indicate to ILU that a particular object type is to be treated as transient, you mark the object type specification, in the ISL, with the keyword COLLECTIBLE.

For permanent objects, like the Tutorial.Factory object type, the ILU Java support will maintain a reference to the instance, preventing the Java collector from collecting it.



Be the first one to comment on this page.




  ILU eBooks

No eBooks on ILU could be found as of now.

 
 ILU FAQs
More Links » »
 
 ILU Interview Questions
More Links » »
 
 ILU Articles

No ILU Articles could be found as of now.

 
 ILU News

No News on ILU could be found as of now.

 
 ILU Jobs

No ILU Articles could be found as of now.


Share And Enjoy:These icons link to social bookmarking sites where readers can share and discover new web pages.
  • blinkbits
  • BlinkList
  • blogmarks
  • co.mments
  • connotea
  • del.icio.us
  • De.lirio.us
  • digg
  • Fark
  • feedmelinks
  • Furl
  • LinkaGoGo
  • Ma.gnolia
  • NewsVine
  • Netvouz
  • RawSugar
  • Reddit
  • scuttle
  • Shadows
  • Simpy
  • Smarking
  • Spurl
  • TailRank
  • Wists
  • YahooMyWeb

Previoushome Next

Keywords: Using OMG IDL with ILU, ILU, ILU, ILU tutorial, ILU tutorial pdf, history of ILU, Custamizing Style Sheet, learn ILU

HTML Quizzes
HTML Quiz
XHTML Quiz
CSS Quiz
TCP/IP Quiz
CSS 1.0 Quiz
CSS 2.0 Quiz
HLML Quiz
XML Quizzes
XML Quiz
XSL Quiz
XSLT Quiz
DTD Quiz
Schema Quiz
XForms Quiz
XSL-FO Quiz
XML DOM Quiz
XLink Quiz
XQuery Quiz
XPath Quiz
XPointer Quiz
RDF Quiz
SOAP Quiz
WSDL Quiz
RSS Quiz
WAP Quiz
Web Services Quiz
Browser Scripting Quizzes
JavaScript Quiz
VBScript Quiz
DHTML Quiz
HTML DOM Quiz
WMLScript Quiz
E4X Quiz
Server Scripting Quizzes
ASP Quiz
PERL Quiz
SQL Quiz
ADO Quiz
CVS Quiz
Python Quiz
Apple Script Quiz
PL/SQL Quiz
SQL Server Quiz
PHP Quiz
.NET (dotnet) Quizzes
Microsoft.Net Quiz
ASP.Net Quiz
.Net Mobile Quiz
C# : C Sharp Quiz
ADO.NET Quiz
VB.NET Quiz
VC++ Quiz
Multimedia Quizzes
SVG Quiz
Flash Quiz
Media Quiz
SMIL Quiz
Photoshop Quiz
Gimp Quiz
Matlab Quiz
Gnuplot Programming Quiz
GIF Animation Quiz
Scientific Visualization Quiz
Graphics Quiz
Web Building Quizzes
Web Browsers Quiz
Web Hosting Quiz
W3C Quiz
Web Building Quiz
Web Quality Quiz
Web Semantic Quiz
Web Careers Quiz
Weblogic Quiz
SEO Quiz
Web Site Hosting Quiz
Domain Name Quiz
Java Quizzes
Java Quiz
JSP Quiz
Servlets Quiz
Struts Quiz
EJB Quiz
JMS Quiz
JMX Quiz
Eclipse Quiz
J2ME Quiz
JBOSS Quiz
Programming Langauges Quizzes
C Quiz
C++ Quiz
Visual Basic Quiz
Data Structures Using C Quiz
Cobol Quiz
Assembly Language Quiz
Mainframe Quiz
Forth Programming Quiz
Lisp Programming Quiz
Pascal Quiz
Delphi Quiz
Fortran Quiz
OOPs Quiz
Data Warehousing Quiz
CGI Programming Quiz
Emacs Quiz
Gnome Quiz
ILU Quiz
Soft Skills Quizzes
Communication Skills Quiz
Time Management Quiz
Project Management Quiz
Team Work Quiz
Leadership Skills Quiz
Corporate Communication Quiz
Negotiation Skills Quiz
Database Quizzes
Oracle Quiz
MySQL Quiz
Operating System Quizzes
BSD Quiz
Symbian Quiz
Unix Quiz
Internet Quiz
IP-Masquerading Quiz
IPC Quiz
MIDI Quiz
Software Testing Quizzes
Testing Quiz
Firewalls Quiz
SAP Module Quizzes
ERP Quiz
ABAP Quiz
Business Warehousing Quiz
SAP Basis Quiz
Material Management Quiz
Sales & Distribution Quiz
Human Resource Quiz
Netweaver Quiz
Customer Relationship Management Quiz
Production and Planning Quiz
Networking Programming Quizzes
Corba Quiz
Networking Quiz
Microsoft Office Quizzes
Microsoft Word Quiz
Microsoft Outlook Quiz
Microsoft PowerPoint Quiz
Microsoft Publisher Quiz
Microsoft Excel Quiz
Microsoft Front Page Quiz
Microsoft InfoPath Quiz
Microsoft Access Quiz
Accounting Quizzes
Financial Accounting Quiz
Managerial Accounting Quiz
Testimonials | Contact Us | Link to Us | Site Map
Copyright ? 2008. Academic Tutorials.com. All rights reserved Privacy Policies | About Us
Our Portals : Academic Tutorials | Best eBooksworld | Beyond Stats | City Details | Interview Questions | Discussions World | Excellent Mobiles | Free Bangalore | Give Me The Code | Gog Logo | Indian Free Ads | Jobs Assist | New Interview Questions | One Stop FAQs | One Stop GATE | One Stop GRE | One Stop IAS | One Stop MBA | One Stop SAP | One Stop Testing | Webhosting in India | Dedicated Server in India | Sirf Dosti | Source Codes World | Tasty Food | Tech Archive | Testing Interview Questions | Tests World | The Galz | Top Masala | Vyom | Vyom eBooks | Vyom International | Vyom Links | Vyoms | Vyom World | Important Websites
Copyright ? 2003-2024 Vyom Technosoft Pvt. Ltd., All Rights Reserved.