1. OBJECT STORAGE AND INTEROPERABILITY
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

2. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
Access layer
Two major tasks
Translate the request
Translate the results.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

3. Designing access layer classes:
The Process of designing access layer:
For every business class identified, mirror the business class package.
Define relationships.
Simplify classes and relationships.
Redundant classes 2.Method classes
Iterate and refine.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

4. Database Management Systems
DBMS is a set of programs that are used to create, store, modify and delete a database
It contains 3 models
Hierarchial model
Network model
Relational model
Database Interfaces
Data Definition Language(DDL)
Data Manipulation Language(DML)
Data Control Language(DCL)
Transaction Control Language(TCL)
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

5. Sharability and Transaction
Concurrency policy – Goal is to provide consistent view of the database
Pessimistic policy – Allow the users to lock all records when they are accessed and release them after committing transactions.
Optimistic policy – Allow the users to access all the records without acquiring locks. While committing the transactions, each verifies no other has modified the data it has read. Otherwise the transaction is roll back.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

6. Client Server Computing
Client is a system that request a service.
Server is a system that responds to the request.
Server types
Database servers
Transaction servers
Mail servers
File servers
Print servers
Web servers
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

7. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
“I want to
collaborate
with my
colleague”
“I want to access
some information”
Client
Server
Peer-to-peer
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

8. Client Server Computing
Two tier architecture
Three tier architecture
Components of client server computing
View layer
Business layer
Access layer
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

9. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
Three-tier client/server
Local-area network
Application
logic
Presentation
Shared
data
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

10. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
Client
Web
browser
Web
server
Common
gateway
interchange
Application logic
Databases and DBMS
Application partition
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

11. Distributed and Cooperative processing
Distributed processing – Distribution of application and business logic to multiple processing platforms.
Cooperative processing – A form of distributed computing in which two or more distinct processes are required to complete a single business transaction.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

12. COOPERATIVE PROCESSING
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

13. Distributed objects computing
DOC standards
CORBA – Common Object Request Broker Architecture
Microsoft COM – Component Object Model
Microsoft DCOM – Distributed Component Object Model
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

14. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

15. Object oriented databases
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

16. Rules of object oriented system:
Object identity must be supported.
The system must supportcomplex objects.
Object must be encapsulated.
The system must support types or classes.
The system must support inheritance.
The system must avoid premature binding. 7.The system must be computationally complete.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

17. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
Rules make it a DBMS:
It must be persistent, able to remember an object state.
It must be able to manage very large database. .It must accept concurrent users.
It must be able to recover from hardware and
software failures.
Data query must be simple.
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

18. Object Oriented Database Management Systems
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

19. Object-oriented system:
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

20. Object – Relation mapping
Table-Class mapping
Table-multiple classes mapping
Table-inherited classes mapping
Tables-inherited classes mapping
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

21. MULTI DATABASE SYSTEMS
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY

22. Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY
THANK YOU
Dr S.ARUNA/III BCA-B/OOAD/OBJECT STORAGE AND INTEROPERABILITY