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Given by TangoInteractive Team at Tango Tutorial San Diego MRA on June 26 27 98 Datemod;June 18 98. Foils prepared
Outside Index
Summary of Material
| This is still under development and will be released in Tango 1.1 Sept 98, but represents the most elegant way of building collaborative Java applets |
| We review JavaBeans which are Java's component model |
| We discuss the current TangoBean architecture and illustrate process with a simple example where applets has two buttons -- On and Off |
Denote Foils where Image Critical
Denote Foils where HTML is sufficient
TANGO Interactive Tutorial Overview of TangoBeans API and Motivation
Abstract of TangoBean Overview
What are JavaBeans I
What are JavaBeans II
TangoBeans - Overview
TangoBeans - Component Functionality
TangoBean Architecture
Building a User TangoBean
TangoBeans - Components
TangoBeans - ObjectPipe
TangoBeans - Modes of Operation
Using TangoBeans
Using TangoBeans - continued
TangoBeans - Tools and Resources
Outside Index
Summary of Material
HTML version of Basic Foils prepared 
Full HTML Index
| Prepared by Marek Podgorny and Tango Team |
| Presented by Geoffrey Fox |
| NPAC, Syracuse University |
| MRA Meeting San Diego June 26-27 1998 |
HTML version of Basic Foils prepared
Full HTML Index
| This is still under development and will be released in Tango 1.1 Sept 98, but represents the most elegant way of building collaborative Java applets |
| We review JavaBeans which are Java's component model |
| We discuss the current TangoBean architecture and illustrate process with a simple example where applets has two buttons -- On and Off |
HTML version of Basic Foils prepared
Full HTML Index
| They are Java's implementation of "component-based" visual programming |
| This modern software engineering technique produces a new approach to libraries which become a "software component infrastructure(SCI)" |
| There is a visual interface to discovery of and setting of values of and information about parameters used in a particular software component |
| JavaBeans uses the event model of JDK1.1 to communicate between components |
| One expects Javabeans to become the CORBA component interface (defining containers in CORBA) |
| Enterprise Javabeans are extremely important server side version which are the Java way of building reuseable middleware |
HTML version of Basic Foils prepared
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| The visual interface allows inspection of and implementation of both individual beans and their linkage . This visual construction of linkage allows one to form nontrivial programs with multiple communicating components |
Apart from the event mechanism which is a communication/linkage mechanism, ComponentWare (and JavaBeans in particular) "just" give a set of universal rules (needed for interoperability) for rather uncontroversial (albeit good) object-oriented and visual programming practices
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| Javabeans expose the interesting events and properties and the user can use this in a design environment such as Visual Café to decide how to share these exposed elements |
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Set of JavaBeans integrated with Tango which Support
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| Enables easy automatic construction of collaborative applications using visual tools such as Visual Cafe |
| Universal interface - arbitrary types of objects may be transferred |
| There are System TangoBeans (JavaBeans supporting Tango runtime) enabling the functioing of user TangoBeans |
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| Tango Bean |
| Integrates applet with Tango |
| Executes control operations on applet |
| Accepts new pipes |
| Routes messages to pipes |
| Accepts messages from Pipes |
| Accepts Events defining data to be shared |
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| TangoBean |
| TANGO |
| ObjectPipes |
| System TangoBean |
| User TangoBeans |
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| Designer's view of the TangoBean |
| ObjectPipes |
| User view of this TangoBean |
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| ObjectPipe |
| Communication channel |
| Must be connected to TangoBean |
| Accepts Serializable objects |
Methods
|
Generated Events
|
Accepted Events
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| ObjectPipes send objects |
| travelling through them |
| (which can be data or events) |
| to the system TangoBean |
| which replicates them to |
| all involved clients |
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| TangoBean |
| ObjectPipe |
| to TANGO |
| from TANGO |
| User1 |
| User2 |
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Design time
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Run-time - testing environment
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Run-time - Tango environment
|
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| Install Tango beans in your IDE |
| Design applet using Tango beans and other available components |
| Generate applet |
| Add Netscape security calls |
public void init() {
|
| } |
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| Add notification about applet destruction |
| public void destroy() { |
| tangoBean1.appletDestroyed(); |
| super.destroy(); |
| } |
| Sign applet and all used Tango beans as one package |
| Create JAR file |
| Add applet to Tango applications |
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| Java IDE or JDK |
| Netscape Communicator with AWT 1.1 |
| Digital signature |
| Tools for package signing and JAR generation from Netscape - signtool |