SOA Approach to Integration Table of Contents

Table of Contents

• Preface

• Chapter 1: Integration Architecture, Principles, and Patterns
• Integration Challenges
• Current Situation
• Effective Information Systems
• Replacing Existing Applications
• Requirements and Strategies
• Single Data Input
• Information Access with Low Latency
• Importance of a Centrally Managed Integration Project
• Responsibility to Define Integration Architecture
• Responsibility to Select Integration Infrastructure and Technologies
• Development and Maintenance of Integration Documentation
• Integration Architecture Steps and Approaches
• Bottom-Up Approach
• Top-Down Approach
• Sound Integration Architecture Benefits
• Types of Integration
• Data-Level Integration
• Application Integration
• Business Process Integration
• Presentation Integration
• Business-to-Business Integration
• Integration Infrastructure
• Communication
• Brokering and Routing
• Transformation
• Business Intelligence
• Transactions
• Security
• Lifecycle
• Naming
• Scalability
• Management
• Rules
• Integration Technologies
• Database Access Technologies
• Message-Oriented Middleware
• Remote Procedure Calls
• Transaction Processing Monitors
• Object Request Brokers
• Application Servers
• Web Services
• Enterprise Service Buses
• The Integration Process
• Choosing the Steps and Defining the Milestones
• Sound Practices
• Iterative Development
• Incremental Development
• Prototyping
• Reuse
• Integration Process Activities and Phases
• Integration Patterns
• Summary

• Chapter 2: Service- and Process-Oriented Architectures for Integration
• Defining Service-Oriented Architectures
• Why SOA in the Integration Space?
• Islands in the Enterprise IT Landscape
• The Integration Problem
• Custom Integration Application and Its Issues
• Inverted View: Reusable Services, Simple Integration Processes
• Enter SOA: A Services-Based Integration Architecture
• Concepts and Principles of SOA
• Paradigm Shift—from Self-Contained Applications towards "Services"
• Service Orientation
• Component-Based Services
• The Internet Simplifies Remote Services
• Consuming Services
• Introducing SOA Architecture
• Service Abstractions
• Service Invocation and Service Implementation
• Process Engines
• Messaging Abstractions
• Synchronous and Asynchronous Messages
• Service Registries
• Quality of Service
• Communication Infrastructure
• What is a "Bus"?

• XML and Web Services: SOA Foundation
• Using XML in Middleware
• Middleware Mechanics for Services
• XML-Based Mechanism to "Invoke" Services
• Services over the Web via SOAP
• Web Services—Protocols for SOA
• Technology Agnostic System-to-System Interaction
• Service Description—Using WSDL
• Discovering the Services—UDDI
• Containers to Host Web Services
• Standards Foundation
• Application Platforms (JAVA EE) Hosting Web Services

• Using Services to Compose Business Processes
• Simple Integration Applications
• Simple Business Processes—Orchestrating the Services
• Choreography—Multi-Party Business Process

• SOA Security and Transactions
• Security Challenges in a Services Environment
• Simple Middleware Systems Security
• Security in Java Infrastructure
• Microsoft.NET Security
• Web Services Security for Loosely Coupled Services
• Emerging Web Services Security Standards
• Transactions in SOA
• Web Services Transaction—A Standard

• Infrastructure Needed for SOA
• Service Execution and Communications
• Types of Component Services
• Service Containers (Execution Engines)
• Communication Infrastructure—Under the Covers
• Communication "Bus"—At the Core
• MOM
• XML Backbone (XML, Transformations, and Persistence)
• Reliability and Scalability
• Managing a Distributed SOA Environment
• Options for SOA Infrastructure
• Web Services
• Application Platforms (JAVA EE / .NET)
• Simple Messaging-Based Custom Infrastructure
• Integration Platforms (EAI)
• ESB—Enterprise Service Bus

• Designing Services and Processes for Portability
• Adoption Considerations
• Think Services
• Model the Business Data as XML
• Processes in BPEL
• New Applications—Prepare for SOA/POA
• Design for Infrastructure (Vendor) Independence

• Transition to Process-Oriented Architectures
• Services and Processes Coexist—But Services First
• Process—Orchestration of Services
• POA—Shifting the Focus to "Processes First"
• Concepts and Principles of Process-Oriented Architectures
• POA—Processes First. Services... Maybe!
• POA Enables Top-down Design—Using just Processes
• Analysts Become Programmers
• POA Changing Software Development Roles
• Process Standards
• Infrastructure for Process-Oriented Architectures

• Summary

• Chapter 3: Best Practices for Using XML for Integration
• Introduction
• Domain-Specific XML Schemas
• Validating XML Documents
• Mapping Schemas
• Choosing Processing Models
• Fragmenting Incoming XML Documents
• Design Recommendations
• Default Namespace—targetNamespace or XMLSchema?
• Localize Namespace vs. Expose Namespaces
• Advantages of Localizing Component Namespaces within the Schema
• Advantages of Exposing Namespaces in Instance Documents
• Global vs. Local Declaration
• Russian Doll and Salami Slice Designs
• Element vs. Type
• Zero, One, or Many Namespaces
• Use the Heterogeneous Namespace Design
• Use the Homogeneous Namespace Design
• Use the Chameleon Design
• Using XSL for Transformation
• xsl:import and xsl:include
• Securing XML Documents
• XML Encryption
• Encrypting an XML File
• SSL versus XML Encryption
• XML Signatures
• Guidelines for Securing Your Services
• XML Streaming and DOM
• Pull Parsing versus Push Parsing
• What is StAX?
• StAX and Other JAXP APIs
• Performance Considerations
• Limit Parsing of Incoming Documents
• Use the Appropriate API
• Choosing Parser
• Reduce Validation Cost
• Referencing External Entities
• Dynamically Generated Documents
• Using XML Judiciously
• Summary

• Chapter 4: SOA and Web Services Approach for Integration
• Designing Service-Oriented Architectures
• SOA Evolution
• IT Evolution
• Patterns
• Business Patterns
• Integration Patterns
• Composite Patterns
• Application Patterns
• Runtime Patterns
• Product Mappings
• Guidelines
• Designing Sound Web Services for Integration
• Web Services Architecture
• Web Services Benefits
• Self-Contained
• Self-Describing
• Modular
• Accessible Over the Web
• Language, Platform, Protocol Neutral
• Open and Standards-Based
• Dynamic
• Composable
• Patterns
• Self-Service Business Pattern
• Extended Enterprise Business Pattern
• Application Integration Pattern
• Application Integration Patterns
• Direct Connection Application Pattern
• Broker Application Pattern
• Serial Process Application Pattern
• Parallel Process Application Pattern
• Runtime Patterns
• Nodes
• Connectors
• Direct Connection Runtime Pattern
• Runtime Patterns for Broker
• Differences between B2B and EAI Web Services
• Interface Design
• Use of a Service Registry
• Writing Interoperable WSDL Definitions
• Validating Interoperable WSDL
• Interoperability Challenges in Web Services
• WS-I Specifications
• WS-I Basic Profile 1.0
• WS-I Basic Profile 1.1
• WS-I Basic Profile 1.2
• WS-I Basic Security Profile 1.0
• Guidelines for Creating Interoperable Web Services
• Avoid using Vendor-Specific Extensions
• Use the Latest Interoperability Tests
• Understand Application Data Models
• Understand Interoperability of Data Types
• Java EE and .NET Integration using Web Services
• Sample Integration Scenario
• Developing the Java Web Service
• Deploying the Service
• WSDL for Java Web Service
• Developing the .NET Web Service
• Deploying the .NET Web Service
• Developing the Test Client
• Summary

• Chapter 5: BPEL and the Process-Oriented Approach to Integration
• Process-Oriented Integration Architectures
• Service Composition
• Orchestration and Choreography
• Complexity of Business Services
• Identifying Business Services
• Development Lifecycle
• SOA and Executable Business Processes
• Example Business Process
• BPEL for Service Composition
• What We Can Do with BPEL
• Executable and Abstract Processes
• BPEL and Other Process Languages
• Languages for Choreography
• Modeling Notations
• Writing BPEL Processes
• Process Interface
• Partner Links
• Partner Link Types
• Variables
• Handlers
• Fault Handlers
• Event Handlers
• Compensation Handler
• Scopes
• Overview of BPEL Activities
• Developing an Example BPEL Process
• Services Used in the Process
• Resource Data Service
• Rating Service
• Billing Service
• Adding Partner Link Types to the Service's WSDL
• Define a WSDL Interface for the BPEL Process
• Writing the BPEL Process Logic
• Process Declaration
• Defining Partner Links
• Declaring Variables
• Writing the Process Definition
• Adding a Fault Handler
• Adding an Event Handler
• Deploy and Run the Process
• Summary

• Chapter 6: Service- and Process-Oriented Approach to Integration Using Web Services
• Enterprise Service Bus
• From Just Services to an Enterprise Bus
• ESB Architecture
• Defining ESB
• Middleware for Middleware Technologies
• Modeling the Enterprise Document Flows
• ESB Services: Built on Documents/Messages
• ESB Infrastructure Components
• Built on Web Services Standards
• Service Containers—The Primary Tier of the Bus
• Inside the Container
• External View of Services: Documents Sent to Abstract "Endpoints"
• JBI—A Standard Container to "host" Services
• Communication Infrastructure
• Bus Services—Mediation, Transformations, and Process Flows
• Why Mediation?
• Infrastructure Mediation
• Intelligent Content-Based Routing
• Transformation Services
• ESB Processes: Extending the WS Process Model
• Security and Transactions
• Security Considerations in Integration Architecture
• ESB Security—Built on WS-Security
• Transaction Semantics for Enterprise Integration
• Distributed Transactions and Web Services
• Realizing Transactions in ESB
• Reliability, Scalability, and Management
• Reliability Concepts
• Achieving Reliable Communication through ESB
• High Availability in ESB—Leveraging the Messaging Platform
• Scalability and Performance of ESB
• Control and Management of ESB
• Application Development Considerations
• Integration Application Constituents
• ESB—Application Design Approach
• Comparing ESB with Other Technologies
• ESB—Helps Avoid Vendor Lock-Ins
• Extending ESB to Partners
• Summary

• Index