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Course: CS 842, Fall 2009School: Air Force Academy
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of Principles OO Middleware Week 4 1 842 - Ralph Deters - 2009 1/25/2009 Outline Types of Middleware OO Middleware Developing with OO Middleware 2 842 - Ralph Deters - 2009 1/25/2009 Types of Middleware Transaction Oriented Message Oriented Remote Procedure Calls Object-Oriented Obj t O i t d Service / Resource Oriented ..... 3 842 - Ralph Deters - 2009 1/25/2009 Transaction Oriented IBM's CICS, BEA's...
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of Principles OO Middleware
Week 4
1
842 - Ralph Deters - 2009
1/25/2009
Outline
Types of Middleware OO Middleware Developing with OO Middleware
2
842 - Ralph Deters - 2009
1/25/2009
Types of Middleware
Transaction Oriented Message Oriented Remote Procedure Calls Object-Oriented Obj t O i t d Service / Resource Oriented .....
3 842 - Ralph Deters - 2009 1/25/2009
Transaction Oriented
IBM's CICS, BEA's Tuxedo, etc... Focus on transactions (ala database) Transaction (ACID)
Atomic A i Consistent Isolated Durable
Used in combination with DBMS 2-Phase Commit
4
842 - Ralph Deters - 2009
1/25/2009
Message Oriented
IBM's MQSeries, Sun's ToolTalk, etc... Used when
Reliable & asynchronous communication is dominant form of interaction i i
Supports naturally asynchronous communication Supports multicast S li Object-Oriented Middleware is starting to integrate message oriented approaches
5
842 - Ralph Deters - 2009
1/25/2009
Remote Procedure calls
RPC Developed by Sun in the 80's Sun offers RPC as part of their OS (Solaris) RPC
Procedure call across machine/process boundaries
RPC can be viewed as the parent of object-oriented middleware RPC are now part of the DCE
6
842 - Ralph Deters - 2009
1/25/2009
RPC
RPCprograms = server-parts RPCprograms have interfaces definitions
Defines procedures Defines data types
Marshalling/Unmarshalling Static marshalling g
Routine chosen at compile-time
Dynamic marshalling
Routine chosen at run-time
7
842 - Ralph Deters - 2009
1/25/2009
8
842 - Ralph Deters - 2009
1/25/2009
Object-Oriented Object Oriented Middleware
Next step after RPC Best known example
CORBA
Common C Object Request Broker Architecture
9
842 - Ralph Deters - 2009
1/25/2009
Evolution of Object Technology
10
842 - Ralph Deters - 2009
1/25/2009
E v o l u t i o n
11
842 - Ralph Deters 2009
1/25/2009
CORBA - Evolution
12
842 - Ralph Deters - 2009
1/25/2009
Evolution
Simula
1966 contains some OO concepts e.g. class OOP l
Information hiding
1972 Parnas
Smalltalk
1985 First real OOP language
C++
Stroustrup (AT&T) develop C
13
842 - Ralph Deters - 2009
1/25/2009
Evolution cont .... cont.
Eiffel
C++ never managed to repeat the success of C
Object-Oriented Analysis & Design (OOAD)
Booch, J b B h Jacobson, Rumbaugh etc... R b h
UML
Modeling language
14
842 - Ralph Deters - 2009
1/25/2009
Evolution cont ... cont.
Open Network Communication (ONC) from SUN
Remote Procedure Calls (RPC) Now a standard thanks to OSF
OMG
1989 Goal: Promote CORBA
Partners: SUN, IBM, MS, etc.... , , ,
15
842 - Ralph Deters - 2009
1/25/2009
Evolution cont ... cont.
Component Object Model (COM)
Simple interoperability model for MS platforms DCOM
Supports distributed objects
JAVA
Java supports Remote Method Invocation (RMI) Java supports CORBA (not very good) Now RMI/CORBA tools
16
842 - Ralph Deters - 2009
1/25/2009
Requests
What is a method call (request)...
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