Oracle Modernization Solutions电子书

Oracle Modernization Solutions

Table of Contents

Oracle Modernization Solutions

Credit

About the Authors

About the Co-Authors

Preface

What This Book Covers

What You Need for This Book

Who is This Book For

Conventions

Reader Feedback

Customer Support

Downloading the Example Code for the Book

Errata

Piracy

Questions

1. Introduction to Legacy Modernization

What We Won't Cover

Methodology and Estimation

The Modernization Marketplace and Why Modernize

Deep Dive on Approaches

Overview of the Modernization Options

Legacy Understanding

Application Portfolio Analysis (APA)

APA Macroanalysis

APA Microanalysis

Application Portfolio Management (APM)

Re-Architecturing

SOA Integration

Platform Migration

Automated Migration

Re-Hosting

Re-Hosting Based Modernization

Data Modernization

Legacy Adapters

Replacement

Business Value — What Really Matters?

Summary

2. Overview of SOA Integration

Integrating SOA into a Legacy Framework

Drivers for SOA Integration

Considerations for SOA Enablement

Where to Begin — a Word on Application Discovery

Assessment Process: Bringing it together

Summary

3. SOA Integration — Functional View, Implementation, and Architecture

SOA Integration: Functional View

SOA Integration: Technical View

User Interface

Legacy Service Bus (LSB) and Application Server

Legacy Services Engine (LSE)

LSE Components

Connectivity and Processing Engine

SQL Engine

Optional LSE Components

Orchestration

Security

Caching

LSE Development

LSE Implementation/Deployment

LSE Server Location

Legacy Artifacts

Metadata Repositories

Other Technical and Business Aspects

Scalability

Performance

Failover

Transaction Processing

Governance

Human Factors

Agility and Adaptability of Architecture

Host Support

SOA Integration

Implementation Options

Roll My Own

Buy a Bunch of Products and become an Integrator

One Pre-Integrated Stack

Implementation Approach

Phases in the Implementation Cycle

Understanding the Business Drivers

Products and Technologies Used in this Phase

Determine Business Processes to Expose

Products and Technologies Used in this Phase

Install/Configure the Software

Products and Technologies Used in this Phase

Expose Legacy Artifacts

Integrate Services into the application server

Products and Technologies Used in this Phase

Security and Governance

Products and Technologies Used in this Phase

Performance and Scalability

Products and Technologies Used in this Phase

Production Rollout

Products and Technologies Used in this Phase

Monitor Usage and Refine

Products and Technologies Used in this Phase

SOA Integration — Top Four Scenarios and Oracle Solutions

Oracle Products Included in the Solution

Oracle Products Not Included in the Solution

Scenario One — Enterprise Information Integration

Problem

Context

Forces

Solution

Scenario One Summary

Scenario Two — Web Enablement

Problem

Context

Forces

Solution

Scenario: Two Summary

Scenario Three — Report Off-Load Using Data Migration

Problem

Context

Forces

Solution

Scenario Three: Summary

Oracle BAM

Oracle BPEL

Oracle Data Integrator (ODI)

Oracle BI

Scenario Four: End-to-End SOA

Problem

Context

Forces

Solution

Scenario Four: Summary

Oracle WebCenter

Oracle BAM

Oracle ESB

Oracle OID and SSO

SOA Integration — Final Product Summary

IBM and Legacy SOA Integration

Summary

4. SOA Integraton — Scenario in Detail

Oracle Software Required

UML and Database Diagrams

Deployment Diagram

Use Case Diagram

Activity Diagram

Sequence Diagram

Data Model Diagram

Which Legacy Artifacts Should I Expose? — Using the Relativity Product Set

Application Layers — Understanding Relativity Terminology

Understanding an Artifact's Place in the Architecture

Vertical Slices

Horizontal Slices

Understanding Anomalies

Client Programs with Data Access

Calling Client Programs

Calling Transitional Programs

Impure Service Programs

Other Anomalies that Need Remedial Action

Data Validation Problem

The Problem of Transient or Temporary Data Queues

Finding the Service Functionality — Relativity SOA Analyzer Product

Starting from Screens

Looking for Special Program Constructs

The Case of Mixed Programs — Program 'Slicing'

Determining the Data Interface

Summary Legacy Artifact Discovery Using Relativity

Exposing the Legacy VSAM File Data Access

Connecting to Oracle Connect on Mainframe and Setting Connection Properties

Oracle Connect Data Source

Oracle Connect Adapter

Development Using Oracle JDeveloper

Prework

Application Modules

Presentation-Tier/User Interface — HTML Page

Legacy Web Service — VSAM Adapter Service

Two-Phase Commit

Oracle Database Persistence

Deploying to the Oracle Application Server

Configuring Oracle Application Server for the Legacy Adapter

Configuring Oracle Application Server Oracle Database Connection

Deploying to Oracle Application Server Using JDeveloper

Running the Example

Running the application

Summary

5. Overview of Re-architecturing

What is Re-Architecture?

Drivers and Considerations for Re-Architecture

Platform Agility

Human Factors to Consider in a Re-Architecture Project

How IBM Views Re-Architecture

IT/Technical Drivers and Considerations

Getting Off the Mainframe

Creating a Flexible, Adaptable, and Agile Architecture

Advanced Development Tools

Technical Considerations for a Re-Architecture Effort

Subject Matter Experts (SME)

Risk of Modernization

System Performance

Usability/Training

Re-Architecture versus Re-Host

Re-Architect Deep Dive

No Ripping and Replacing

Pros and Cons

Pros

Cons

Summary

6. Re-Architecture — Functional View, Implementation, and Architecture

Technical Advantages of Re-Architecture

Application Maintenance

Enterprise Information Integration (EII) and Enterprise Application Integration (EAI)

Architected for the Internet

Scalability

Availability

Greater Software Options

On Demand Reporting

Security

Overcoming Barriers to Change

Custom Integration Applications and Utilities

Custom Workflow

Custom ETL

Undisciplined Development

Decoupling the Application-Tiers

Presentation-Tier

Business Rules

Data Access

Workflow/Business Process Flow

Re-Architecture is Happening

Re-architecture — Functional View

A Technical Perspective of the Functional View

Other Components of the Functional Infrastructure

Re-architecture — Optional Software Components

Implementation Process: Common Attributes, Approach for Batch, and Online Processes

Top Three Re-Architecture Approaches

Three "Iterative-Phased" Approaches (IPA)

Data Migration

Business Processes and Application Logic

Move Standalone Application

Re-archtecture Modernization Life Cycle

Life-Cycle Caveats

Application Portfolio Analysis Completed

Life Cycle compared to Legacy SOA Integration Life Cycle

"Big Bang" and Parallel Production

The Human Element

Training

Re-Architecture Phases

Discovery/Recovery

Design Target Architecture

Install and Configure Oracle Software and Hardware

Model Target Application

Development Iterations

User Acceptance Testing (UAT)

Performance Scalability

Production Roll out

Running in Parallel

Unplug the Legacy Application

Using a Modernization Factory for Re-Architecture Implementation

Final Architecture — Common Oracle Products for Batch and Online

Hardware, Operating System, and IBM

Summary

7. Batch Systems Re-architecture Technical Deep Dive

Historical Reasons for Batch

Requirements of a Batch System

Top Five Batch Patterns

Multi Record Type Files — Pure Batch File Processing

Transaction Processing — Pure Autonomous Transactions

Administrative Batch — Backup, Archiving

Reporting — 'Green Bar', Exception Handling, Error Handling

Third-Party Interfaces — Internal and External Information Integration

Technical View

Optional Products

Job Scheduler and BPEL Compared

Implementation Process

Recovery/Discovery Approaches

Methodology

Best practices

Tooling

Re-Design/Re-Factoring Approaches

The Top-Down Approach

The Bottom-up Approach

The Hybrid Approach

Repositories

Relativity Repository

Scheduler Repository

OWB Repository

ADF/OFM Repositories

ADF

OFM SOA Suite for BPEL

OFM SOA Suite Business Rules

Re-Design/Re-Factoring for each Legacy Artifact Group

Green Bar Reports

Recovery/Discovery

Re-Design/ Re-Factor

Job Scheduler — UML Process Flow

Recovery/Discovery

Re-Design/ Re-Factor

Business Flows

Recovery/Discovery

Re-Design/ Re-Factor

COBOL Business Rules

Recovery/Discovery

Re-Design/ Re-Factor

COBOL Data Access Logic

Recovery/Discovery

Re-Design/Re-Factor

Database and database schema

Recovery/Discovery

Re-Design/Re-Factor

Target Generation

Oracle Implementation Tools and Source to Target Mapping

Summary of Tools and Frameworks

Source to Target Artifact Mapping

Final Oracle Batch Architecture

Scenario Description

New Batch Design Pattern(s) in Oracle

Summary

8. Online Systems Re-architecture Technical Deep Dive

History and Evolution of Online Systems

History of SOA and SaaS

Top Five Online Patterns

COBOL/CICS Applications Accessing VSAM and DB2 Databases

COBOL and CICS

DB2

VSAM

COBOL, IMS/DC, or IMS/TM Applications Accessing IMS/DB Database

IMS/DC and IMS/TM

IMS/DB (IMS Database)

COBOL, CICS, Assembler Applications Talking to Datacom or IDMS Database

Datacom

IDMS (Integrated Data Management System)

Assembler

PL/I and CICS Applications Making Use of VSAM and DB2 as Data Store

NATURAL and COBOL Applications Accessing an ADABAS Database

ADABAS (Adaptable DAta BAse System)

Natural

Technical View

Infrastructure Unique to Re-architecture

Single Management Tool

Single Security Model

Development Tools

Metadata Repositories

Enterprise Information Integration (EII)

Enterprise Application Integration (EAI)

Transactions

Infrastructure Not Required for Legacy SOA Integration

UI Navigation

Java EE Applications (EJB, Java, POJO, JSP, Servlets, JSF)

Relational Database

Grid Infrastructure (Grid Computing)

Backup and Recovery

Technologies Not Necessary for Legacy SOA Integration

Business Rules

Data and Business Services

Technical View Infrastructure Components

Capacity Planning Tools

Chargeback and Accounting Solutions such as CA (JARS)

Application Development Tools

Testing Tools

Reporting

High Speed Printing and Viewing

Data Archiving

Disaster Recovery

Tape Management

Human Error Recovery

Internationalization

Network Architecture/Protocol

Reliability, Availability, and Scalability

Implementation Process — Online Systems

Presentation/User Interface

Recovery/Discovery

Re-Design/ Re-Factor

UI Navigation

Recovery/Discovery

Re-Design/ Re-Factor

Oracle Implementation Tools and Source to Target Mapping

Summary of Tools and Frameworks

Development Life Cycle Support Tools

Source to Target Artifact Mapping

Final Oracle On-line Architecture

Scenario Details

New Online Design Pattern in Oracle

Presentation

UI Navigation

Application Server

Information and Business Services

Relational Database

Summary

9. Re-Architecture — Scenario in Detail

Oracle Software Required

UML and Screen Flow Diagrams

Source Application

Oracle Target Architecture

Application Mining Using Relativity

Mining the User Interface and Navigation-Tiers

Capturing the Legacy User Interface

Legacy User Interface Discovery

Screen Navigation Discovery

Forward Engineering

Mining Business Rules

Prerequisites

Identifying the Business Rules

Using Pattern Search

Searching Validation Rules

Using Backward Auto-Detection

Putting it Together

Forward Engineering into Oracle and Java EE

Producing the Target User Interface and Navigation

Running the Presentation-Tier Mock-up in Oracle Application Server

Deploying to the Oracle Application Server

Running the Application

Producing the Target Business Rules

Creating the Rules Repository and Dictionary

Creating Ruleset

Java Fact — Adding the Java Fact Class to the Rules Author

Adding the Rule

Calling the Business Rules from Java EE and BPEL

Automatic Business Rules Generation Using Java Code

Data Migration — A Quick, Easy, and a Cost-Effective Approach

Summary

10. Introduction to Re-Host based Modernization Using Tuxedo

Re-Hosting Based Modernization

Critical Success Factors in Mainframe Re-hosting

Preserving Application Logic and Data

Online Transaction Processing Environment

User Interface Migration

Workload Monitoring and Management

Batch Jobs

Files and Databases

Mainframe DB2

IMS

VSAM

Meeting Performance and Other QoS Requirements

Phased Migration and Mainframe Integration

SOA Enabling Re-hosted Applications

Further Re-architecture of Re-hosted Applications

Summary

11. Legacy Modernization — The Future

Green Computing

Standards Organizations

Object Modeling Group (OMG)

Record Type (COBOL)

WC3

Model Driven Architecture (MDA)

Challenges with the Traditional Approach

The MDA/MDM Approach

Cloud Computing

Amazon Elastic Compute Cloud

Grid Computing

Virtualization

Application Fabrics

Extreme Processing

Summary

A. Technology Glossary

Common Legacy Acronyms

Acronyms and Initials

PCI Security Standards

Index