2. 5/29/2023 Ch.1,2 2
Introduction
We will study the various different
system that we will encounter in a
typical enterprise system – Ch.1
We will also study the general
enterprise integration objectives – Ch.2
3. 5/29/2023 Ch.1,2 3
Types of Systems (1)
Legacy systems:
Many local solutions to enterprise problems.
Many models, platforms, languages, and proprietary
software packages.
Fragmented systems spread around the enterprise.
Example: PC-based payroll system for a local branch of a
large banking system.
Data warehouse:
Collection of business data to provide analytical processing,
supporting queries and reporting.
Example: Trend in sales with reference to month to enable
planning.
Electronic commerce:
Internet and WWW have enabled business to reach their
customers directly (B2C) and exchange data and deal with
business partners efficiently (B2B).
4. 5/29/2023 Ch.1,2 4
Types of Systems (2)
Web-enabled applications:
Web enabling improves accessibility through the
use of browsers.
Workflow Management systems:
Business process management systems.
Move from batch to event-based systems
Business transactions are processed as they occur.
Transactions can be handled with different
priorities, authorized based on different criteria,
and serviced with different specialized skills.
Provides the means to formalize processes,
enforce compliance, monitor performance, and
introduce process improvements.
5. 5/29/2023 Ch.1,2 5
Technologies
Study the technologies in terms of Web-tier,
(business) logic tier, data tier
Unified Modeling Language (UML) for design
purposes.
Provides 12 different models for various phases of
software development.
Model Driven Architecture (MDA): design tool.
Provides the ability to model applications as
Platform Independent Model (PIM).
Java Server Pages (JSP) and servlets:
web presentation/logic
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Technologies
eXtensible Markup Language (XML):
Markup language with customizable tag for
exchange of information among applications.
CORBA from Object Management
Group(OMG):
Enables robust, interoperable distributed objects
and protocols.
Component Technology:
Evolution of object technology.
Provides extensive ability to manage objects as
components.
Example: Enterprise Java beans and COM objects
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Technologies (contd.)
Open data base connectivity(ODBC): standard
protocol to access data bases. JDBC is a java
implementation.
Relational data base systems: RDBMs.
Provides the persistence needed for application
data.
Relations represented by tables of records of data.
Primary key uniquely selects a record.
Can combine tables on attributes, select only rows
and columns needed.
Example: Oracle 9.2
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Enterprise Application
Integration (EAI)
EAI is the practice of linking many legacy
systems, commercial-of the-shelf (COTS)
systems and current systems to consolidate
the operations in an enterprise.
Simple solution is the store-forward of data
between systems.
Where data are exchanged between many
sources and many destinations a message
broker facility is used to direct the flow. See
fig.1.2
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EAI (contd.)
EAI provides for exchange of information as
events occur rather than periodic transfer of
files.
It streamlines business processes.
It provides the flexibility of routing of
messages to meet new requirements for
information, including operations monitoring
and the initiation of corrective action on a
timely basis. Example: Project 1’s TPS
integrated with IncidentWeb.
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Enterprise System Pyramid
Application components: pricing, email
Business applications: Shop front
Business Process: login to purchase
Business system domains: B2C
Corporate
Domain: Books sales
Virtual
Enterprise
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Objectives
Adaptable systems and processes
Streamlined processes
Management information
Support for electronic commerce
Integrated security
Replaceable components
Reliable and recoverable systems
Scalability
12. 5/29/2023 Ch.1,2 12
Summary
We studied
Types of enterprise systems,
A representative set of technologies,
Enterprise application integration,
Structure of enterprise systems
Objectives of enterprise system design.
Your task: Casual reading of Chs. 1 and 2.
