System-Architecture-Catalyst-Fall01

Course content (Learning Resources) -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content.
Messages -- MBA Students and Faculty can engage in asynchronous communication through Catalyst. Asynchronous messaging is supported through a service called, Discussion Forum. The Discussion Forum supports the upload and posting of messages in the order they are received, along message threads.
MBA students personal information -- MBA Students can enter and update a designated set of personal information about them (e.g., enrollments, phone number, URL hyperlinks to personal Web pages) that is managed by Catalyst. Items like personal web pages or work-related web pages are not stored within Catalyst, but can be accessed on the Web via Catalyst.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in client program's user interface.

</Input-Objects>

<Output-Objects>

Outputs are always formatted and presented in a manner that is consistent with the look-and-feel associated with Catalyst, and its participation in reinforcing the UCI GSM brand.

View of Course content (Learning Resources) -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content.
View of Messages -- MBA Students and Faculty can engage in asynchronous communication through Catalyst. Asynchronous messaging is supported through a service called, Discussion Forum. The Discussion Forum supports the download/browsing of messages in the order they are received, along message threads.
View of MBA students personal information -- MBA Students can enter and update a designated set of personal information about them (e.g., enrollments, phone number, URL hyperlinks to personal Web pages) that is managed by Catalyst. Items like personal web pages or work-related web pages are not stored within Catalyst, but can be accessed on the Web via Catalyst.
View of User navigation command selections -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in client program's user interface. Selected items are highlighted in the display view.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, Email, JChat, or applets can be invoked as outputs from Catalyst.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface>

</Component>

Browser plug-ins:perhaps the most common plug-in is that associated with the Adobe Acrobat .pdf file reader. When you download a Web object with a .pdf extension, it generally should invoke the Adobe Acrobat within your browser window if the PDF reader plug-in is installed in the user's client browser.

<Input-Objects>

Course content (Learning Resources) MIME Types-- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content that are coded as .html/.htm, .doc, .ppt. .pdf, or other common MIME data types.
User navigation commands available in a plug-in -- Users navigate through selecting (e.g., "mouse-clicking") items visible as function icons/buttons, hyperlinks or selection menus displayed in plug-in's user interface.

</Input-Objects>

<Output-Objects>

A display view or copy of course content or user navigation command is generally available to users as Outputs, though access may be restricted by user role.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, access to other Web-based content objects, other applications residing on the user's client, or applets can be invoked as outputs from plug-ins.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface> </Component>

<Component>

External Helper Applications that are invoked by the Browser downloading of a registered MIME object type -- for example, if you access a Web object with the URL, http://www.ics.uci.edu/~wscacchi/SA/Requirements/RichPictures/Catalyst01.ppt note the object ends with a ".ppt" extension. On MS Windows-based Web Browsers, such an object triggers the browser to invoke an external program (the "helper" application) for which objects of this MIME type. "ppt" is usually registered to invoke the MS PowerPoint application, either within the browser window (when using Internet Explorer) or external to the browser (when using Netscape Navigator).

<Input-Objects>

Course content (Learning Resources) MIME Types-- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content that are coded as .doc, .ppt. .pdf, or other common MIME data types.
User navigation commands available in a plug-in -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in client program's user interface.

</Input-Objects>

<Output-Objects>

A display view or copy of any Input object is generally available to users as Outputs, though access may be restricted by user role.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, Discussion Forum, JChat, or applets can be invoked as outputs from Catalyst.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface>

</Component>

Discussion Forum -- Catalyst allows users to select another known individual user or group identified (e.g., all MBA Students registered in a UCI GSM course) to participate in a discussion forum. The User Interface to a Forum may be presented as a Web-based (HTML) form with associated hyperlinks to discussion messages along a discussion topic.

<Input-Objects>

Messages -- MBA Students and Faculty can engage in asynchronous communication through Catalyst. Asynchronous messaging is supported through a service called, Discussion Forum. The Discussion Forum supports the entry, upload and posting of messages in the order they are received, along message threads.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as function buttons/tabs, hyperlinks or selection menus displayed in Forum's user interface display form.

</Input-Objects>

<Output-Objects>

Outputs are always formatted and presented in a manner that is consistent with the look-and-feel associated with Catalyst, and its participation in reinforcing the UCI GSM brand.

View or copies of any Discussion Forum object along a message thread is generally available to users as Outputs, though access may be restricted by user role or course identifier.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface> </Component>

<Component>

Applets: application programs that are stored on a Web server then downloaded and invoked when a user selects a content object via their client program (e.g., Web Browser) that requires the processing or results from a separate application program.
JChat -- Catalyst invokes a peer-to-peer instant messaging type of program (e.g., operating as an applet) that provides its own window user interface within the Web browser. JChat operates as a synchronous messaging system.

<Connector>Protocol (HTTP)</Connector>

<Input-Objects>

Messages -- MBA Students and Faculty can engage in synchronous communication through Catalyst. Synchronous messaging is supported through a service called, JChat. JChat is a service similar to Internet Relay Chat.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in applet's user interface.

</Input-Objects>

<Output-Objects>

View or copies of any Input object is generally available to users as Outputs, though access may be restricted by user role.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects>

</Interface>

</Component>

Email: Catalyst can invoke the email program registered with the Web browser as the one to launch (invoke) to subsequently send/receive email. Catalyst allows a user to invoke the user's email program of choice by selecting a content item that includes a mailto:user-id@mail-server (for example, mailto:wscacchi@uci.edu) or other information that enables invocation of the user's email program. Email runs as in a separate window (aka, a "control thread") from Catalyst. Catalyst does not directly import or manage user email messages.

<Input-Objects>

Messages -- MBA Students and Faculty can engage in asynchronous communication through Catalyst. The Email program supports asynchronous messaging among users of Catalyst and anyone else. Email supports the entry, upload, and posting of messages.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in email program's user interface.

</Input-Objects>

<Output-Objects>

View or copies of any Input Email is generally available to users as Outputs.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, a user's Email can invoke plug-ins or helper applications already installed on the user's client if the email message contains file attachments of known MIME type. Email messages can also invoke or update the display in a user's Web browser, if the email message contains embedded URL links that are selected (clicked) by the user.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface> </Component>

Content Server

Web Server (e.g., Apache, an open source web server available for use on Windows, Unix, Linux, MacOS, and other operating systems on networked computers), replies to requests from a user client for content through Catalyst by accessing a content repository, or by accessing content external to Catalyst via the Web. UCI GSM IS development staff have custom-coded common gateway interface (CGI) programs that co-operate with Apache to determine whether to access the database manager within the Content Repository. Otherwise, the request goes to the Web for accessing remote Web content (e.g., following a URL hyperlink that displays the ISBN number for a textbook that in turn retrieves a Web page from amazon.com for the selected book). When Catalyst retrieves content from the Web, it drops its connection to the user client. The user must then go back and refresh/reload the last page served by Catalyst to resume their Catalyst session. If a sufficient delay before refresh occurs, Catalyst times out the connection to the user client, and must then establish a new user session with Catalyst.

<Connector>Protocol (HTTP)</Connector>

<Input-Objects>

Course content (Learning Resources) -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content.
Messages -- MBA Students and Faculty can engage in asynchronous or synchronous communication through servlets or applets managed by the Catalyst Web Server.
MBA students personal information -- MBA Students can enter and update a designated set of personal information about them (e.g., enrollments, phone number, URL hyperlinks to personal Web pages) that is managed by Catalyst. Items like personal web pages or work-related web pages are not stored within Catalyst, but can be accessed on the Web via Catalyst.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in client program's user interface. These menu item selections are input to the Web server.
GSM IS development staff inputs -- Catalyst developers can enter information that create, insert, update or delete schemas or content from the Catalyst Repository, or its internal database. Similarly, they can create, insert, update or delete data entry forms (described in HTML or XML), data presentation displays (using one or more of Active Server Pages (ASP), HTML, XML, Javascript, etc.) visible through a client program user interface, or downloadable application programs ("applets"). Last, developers also input, upload and install application programs (e.g., Common Gateway Interface/CGI programs ("servlets") on the Apache Web server, SQL programs on the Repository database management system, and Java applets that are downloaded to a user client from the Web server on demand).

</Input-Objects>

<Output-Objects>

View or copies of any Input object is generally available to users as Outputs, though access may be restricted by user role.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, Discussion Forum, JChat, Email, or applets can be invoked as outputs from Catalyst Web server
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output..

</Output-Objects> </Interface> </Component>

<Component>

Application Servlets: these are often small application programs or Common Gateway Interface (CGI) scripts that encapsulate and invoke computational processing functions in external applications. These applications rely on servlets to provide transactions processing services between user (client) applications (e.g., Web Browser with content input forms) and the external application (e.g., a legacy DBMS application). Also, "event notification services" that access, retrieve and display (on user clients) content items that are associated with a calendar date, or range of calendar dates (e.g., "this week", "next week", "today") can be realized as application servlets. These programs query the Catalyst Database either by default (e.g., at user login) or by user selection through a client program, then dynamically generate the pre-formatted Web pages with the appropriate content (or hyperlinks) included and displayed in the user's Web browser.

<Connector>API (CGI scripts)</Connector>

<Input-Objects>

GSM IS development staff inputs -- Catalyst developers can enter information that create, insert, update,delete, upload and install application programs (e.g., Common Gateway Interface/CGI programs ("servlets") associated with the Catalyst Web server

</Input-Objects>

<Output-Objects>

View or copies of any Input object is generally though access is restricted only IS Development Staff.
Client program invocations -- Catalyst can respond to a user input or navigational selection by invoking an application program on the user's computer. For example, Catalyst repository commands or SQL database queries can be invoked as outputs from Catalyst servlets.

Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output. </Output-Objects> </Interface> </Component>

Content Repository

Database Management System (DBMS): This repository encapsulates a SQL database when the primary content for courses and information about MBA Students, Faculty and staff is kept. An ER data model describes the database schemas that define and logically structure this content.

<Input-Objects>

Course content (Learning Resources) -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content can be inserted, updated, deleted, or selected for display.
Messages -- MBA Students and Faculty can engage in asynchronous or synchronous communication through Catalyst. Asynchronous messaging is supported through a service called, Discussion Forum. The Discussion Forum supports the upload, posting, and download/browsing of messages in the order they are received, along message threads. Synchronous messaging is supported through a JChat service similar to Internet Relay Chat.
MBA students personal information -- MBA Students can enter and update a designated set of personal information about them (e.g., enrollments, phone number, URL hyperlinks to personal Web pages) that is managed by the Catalyst DBMS. Items like personal web pages or work-related web pages are not stored within Catalyst, but can be accessed on the Web via Catalyst.
User navigation commands -- Users navigate through selecting (e.g., "mouse-clicking") items visible as hyperlinks or selection menus displayed in client program's user interface. These commands are interpreted by CGI servlets that in turn invoke the corresponding database content query for insertion, update, deletion or selection for retrieval to be invoked.
GSM IS development staff inputs -- Catalyst developers can enter information that create, insert, update or delete schemas or content from the Catalyst Repository, or its internal database. Similarly, they can create, insert, update or delete data entry forms (described in HTML or XML), data presentation displays (using one or more of Active Server Pages (ASP), HTML, XML, Javascript, etc.) visible through a client program user interface, or downloadable application programs ("applets"). Last, developers also input, upload and install SQL programs on the Repository database management system).

</Input-Objects>

<Output-Objects>

View or copies of any Input object is generally available to users as Outputs, though access may be restricted by user role.
SQL program invocations -- Catalyst can respond to a user input or navigational selection by invoking an SQL program (e.g., a pre-defined content query type) to insert, update, delete, or select content objects.
Any program invocation may fail and produce an error message or failure signal. Anywhere a client-side program is invoked, a system error message/signal may be produced as output. For example, if a system error is detected, the process may need to output the error message, rather than a potentially erroneous process output.

</Output-Objects> </Interface> </Component>

<Component>

Network File Server: Exceptional or unusual content (e.g., large software application programs used in a class that must be downloaded by MBA Students) are not necessarily stored within the database, but instead may be stored on a network file server that is visible only to the Catalyst Content Server. Thus the content repository incorporates one/more databases, and one/more file systems (not including the Web or remote networked file servers).

<Input-Objects>

Course content (Learning Resources) files -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content that are internally stored a files of a pre-determined data type.
File Identifiers -- The SQL Database in Catalyst can produce results to a query that reference a file by its identifier (file-id). The NFS must then invoked the appropriate repository retrieval command to access the identified file, then forward it through the Web server back to the User's client program.

</Input-Objects>

<Output-Objects>

Views of Course content (Learning Resources) files -- Syllabi, Case Studies, Research Papers, Business Plans, Exam Questions and Answers, and other kinds of learning content that are internally stored a files of a pre-determined data type.

</Output-Objects> </Interface> </Component>

</System-Components>

</System Configuration>

System Visualization

<System-Visualization>

<Author>Walt Scacchi (wscacchi@uci.edu)</Author>

<Last-Modified-By>Walt Scacchi (wscacchi@uci.edu)</Last-Modified-By>

</Graphic>

</System-Visualization>

System Icon (Optional)

<System-Icon>

<Narrative>Catalyst</Narrative>

<Author>Walt Scacchi (wscacchi@uci.edu)</Author>

<Last-Modified-By>Walt Scacchi (wscacchi@uci.edu)</Last-Modified-By>

<Icon>

</Icon>

<System-Invocation>

http://catalyst.gsm.uci.edu

</System-Invocation>

</System-Icon>

XML Models of Enterprise System Architecture (Optional--Extra Credit)

Name/Identifier for XML Modeling/Design tool used
Author (Corporate/Vendor name)
Version (from Vendor information -- e.g., check "About <tool-name>" for this)
XML description of your project
Project-specific Document Type Definition (DTD)
Cascading Style Sheets (CSS)
XML source for your project
Sample XML presentation views of your project