Business Process Execution Language for Web Services Second Edition电子书

Business Process Execution Language for Web Services

Table of Contents

Business Process Execution Language for Web Services

Credits

About the Authors

About the Reviewers

Preface

What This Book Covers

What You Need for Using This Book

Conventions

Reader Feedback

Customer Support

Downloading the Example Code for the Book

Errata

Questions

1. Introduction to BPEL and SOA

Why Business Processes Matter

Automation of Business Processes

Exposing and Accessing the Functionality of Applications as Services

Enterprise Bus Infrastructure for Communication and Management of Services

Integration between Services and Applications

Composition of Exposed Services into Business Processes

Web Services

How Web Services Differ from their Predecessors

Web Services Technology Stack

Enterprise Service Bus

ESB Features

Service Oriented Architecture

SOA Concepts

Services

Interfaces

Messages

Synchronicity

Loose Coupling

Registries

Quality of Service

Composition of Services into Business Processes

Service Composition

BPEL for Service Composition

BPEL Features

Orchestration and Choreography

Executable and Abstract Processes

Relation of BPEL to Other Languages

ebXML BPSS

BPML

WSCI

WS-CDL

BPEL Servers Overview

Oracle BPEL Process Manager

Microsoft BizTalk

IBM WebSphere Business Integration Server Foundation

IBM BPWS4J

ActiveBPEL Engine and ActiveWebflow

OpenStorm Service Orchestrator

The Future of BPEL

Conclusion

2. Web Services Technology Stack

E-Business Collaborations

WS-Security

Example

Binary Security Token

Referencing an External Security Token

Faults

Typical Business Transaction Scenario

WS-Coordination

The Framework

Scenario

CoordinationContext

CreateCoordinationContext

CreateCoordinationContextResponse

Register

RegisterResponse

Faults

Web Services Transaction Specifications

Atomic Transaction

Sharing Context Information

Coordination Protocols

Completion

CompletionWithAck

Two-Phase Commit

PhaseZero

OutcomeNotification

Business Activity

Sharing the Context Information

Coordination Protocols

BusinessAgreement

BusinessAgreementWithComplete

OASIS BTP

The BTP Stack

The BTP Model

Atomic Transactions

Cohesive Transactions

Reliable Messaging

Messaging Model

Example

Requesting Acknowledgement

Delivery Assurances

Other Assertions

Faults

WS-Addressing

Endpoint Reference

Faults

WS-Inspection

Inspection Document Hierarchy

WS-Policy

Policy Outline

The <wsp:All> Operator

The <wsp:ExactlyOne> Operator

The <wsp:OneOrMore> Operator

The <wsp:Policy> Operator

Policy Assertions

Example

Policy Inclusion

WS-Eventing

Event Subscription

Response to Event Subscription

Subscription Renewal

Unsubscribing

Subscription End Message

Conclusion

3. Service Composition with BPEL

Developing Business Processes with BPEL

Core Concepts

Invoking Web Services

Invoking Asynchronous Web Services

Synchronous/Asynchronous Business Processes

Understanding Links to Partners

Partner Link Types

Defining Partner Links

BPEL Process Tag

Variables

Providing the Interface to BPEL Processes: <invoke>, <receive>, and <reply>

<invoke>

<receive>

<reply>

Assignments

Conditions

BPEL Business Process Example

Involved Web Services

Employee Travel Status Web Service

Airline Web Service

Flight Availability Port Type

Flight Callback Port Type

WSDL for the BPEL Process

Partner Link Types

Business Process Definition

BPEL Process Outline

Partner Links

Variables

BPEL Process Main Body

Asynchronous BPEL Example

Modify the BPEL Process WSDL

Modify Partner Link Types

Modify the BPEL Process Definition

Conclusion

4. Advanced BPEL

Advanced Activities

Activity Names

Loops

Delays

Deadline and Duration Expressions

Empty Activities

Process Termination

Fault Handling and Signaling

WSDL Faults

Signaling Faults

Signaling Faults to Clients in Synchronous Replies

Example

Signaling Faults to Clients in Asynchronous Scenarios

Handling Faults

Selection of a Fault Handler

Synchronous Example

Asynchronous Example

Inline Fault Handling

Scopes

Example

First Scope

Second Scope

Third Scope

Serializable Scopes

Compensation

Compensation Handlers

Example

Invoking Compensation Handlers

Managing Events

Pick Activity

Message Events

Alarm Events

Example

Event Handlers

Example

Business Process Lifecycle

Correlation and Message Properties

Message Properties

Mapping Properties to Messages

Extracting Properties

Properties and Assignments

Correlation Sets

Using Correlation Sets

Concurrent Activities and Links

Sources and Targets

Example

Transition Conditions

Join Conditions and Link Status

Join Failures

Suppressing Join Failures

Dynamic Partner Links

Abstract Business Processes

Model Driven Approach: Generating BPEL from UML Activity Diagrams

Conclusion

5. Oracle BPEL Process Manager and BPEL Designer: Overview

Overview and Architecture

BPEL Server

Core BPEL Engine

WSDL Bindings

Integration Services

BPEL Console

BPEL Designer

Database

Process Deployment Example

Process Descriptor

Configuration Properties

Setting the Environment

BPEL Compiler and Revision Numbers

Deployment and Domains

Ant Utility

Process Management with the BPEL Console

Visual Flow

Instance Auditing

Debugging

Overview of Other BPEL Console Functions

Deploying Processes

Management

Performance Tuning

Domains and Administration

Administration of Server-Related Parameters

Managing BPEL Domains

Graphical Development with BPEL Designer

JDeveloper BPEL Designer

Importing Existing BPEL Processes

Partner Links and Web Services

Variables

Process Activities

Copy Rule Editor

XPath Expression Builder

XSLT Mapper

BPEL Validation Browser

Building and Deploying

Eclipse BPEL Designer

Partner Links and Web Services

Variables

XML Type Browser

Process Map

Copy Rule Editor

Function Wizard

Building and Deploying

Summary

6. Oracle BPEL Process Manager: Advanced Features

Extension Functions and Activities

Transformation and Query Support

Data and Array Manipulation

XML Manipulation

Date and Time Expressions

Process Identification

LDAP Access and User Management

Dynamic Parallel Flow

Dynamic Flow Example

Providing a List of Partner Links

Dynamic Parallel Invocation of Airline Services

Dynamic Partner Links

Offer Selection Loop

Deploying and Testing the Example

Web Services Invocation Framework

Advantages of WSIF

Java to XML Bindings

XML Façades

Invoking a Java Class through WSIF

Defining WSIF Bindings in WSDL

WSIF Bindings for Java Classes

Testing the Example

Exception Handling

User Exceptions in Java

Defining Faults in WSDL

Defining WSIF Binding for an Exception

Custom Exception Serializers

Defining Custom Fault Type in WSDL

Writing the Custom Exception Serializer

Registering the Custom Exception Serializer

Invoking EJB through WSIF

WSDL for Session Bean

WSIF Binding for EJB

Generating WSIF Bindings from JDeveloper

Java Code Embedding

Invoking a Java Class from Embedded Code

Notification Service

Email Example

Notification Wizard

Review of Code

Testing the Example

Mail and JMS Services

Workflow Service

Workflow Patterns

Example

Checking User Outcome

Worklist Application to Approve Ticket

Identity Service

BPEL Server APIs

Summary

7. MS BizTalk Server

Overview

Support for BPEL and XLANG/s

Architecture

Ports

Receive Locations

Adapters

Receive Pipelines

Message Contexts

Promoted Properties

Distinguished Fields

The MessageBox

How Publish-Subscribe works

Orchestrations

Maps

Business Rules Engine

Send Pipeline

Building a Sample Orchestration in BizTalk

Scenario

Implementation

Exporting Orchestration to BPEL

Importing BPEL Processes into BizTalk

Do’s and Don’ts for BPEL Compliance in BizTalk

Comparing BizTalk Orchestration Constructs with BPEL

Receive and Send Shapes (<receive>, <invoke>, <reply>)

Port and Role Link Shapes (<partnerLink>, <partnerLinkType>, <role>)

Expression and Message Assignment Shapes (<assign>, <copy>, <from>, <to>)

Decide Shape (<switch>, <case>, <otherwise>)

Delay Shape (<wait>)

Parallel Actions Shape (<flow>)

Loop Shape (<while>)

Suspend Shape

Terminate Shape (<terminate>)

Advanced BPEL Functions using BizTalk

Listen Shape (<pick>, <onMessage>, <onAlarm>)

Scope Shape (<scope>)

Throw Exception Shape and Exception Handling (<throw>, <faultHandler>, <catch>, <catchAll>)

Compensate Shape and Compensation Block (<compensate>, <compensationHandler>)

Correlation (<correlations>, <correlationSets>)

Other BizTalk-Specific Features

Integration with other BizTalk Servers

Integration with Web Services

Integration with the .NET Framework

Human Workflow Services (HWS)

Business Activity Monitoring (BAM)

Health and Activity Tracking (HAT)

BizTalk Server 2006 and Beyond

Summary

A. BPEL Syntax Reference

Important BPEL Activities and Elements

<assign>, <copy>, <from>, <to>

Syntax

Example

<catch>, <catchAll>

Syntax

Example

<compensate>

Syntax

Example

<compensationHandler>

Syntax

Example

<correlations>, <correlation>

Syntax

Example

<correlationSets>, <correlationSet>

Syntax

Example

<empty>

Syntax

Example

<eventHandlers>

Syntax

Example

<faultHandlers>, <faultHandler>

Syntax

Example

<flow>

Syntax

Example

<invoke>

Syntax

Example

<links>, <link>

Syntax

Example

<onAlarm>

Syntax

Example

<onMessage>

Syntax

Example

<partnerLinks>, <partnerLink>

Syntax

Example

<partnerLinkType>, <role>

Syntax

Example

<partners>

Syntax

Example

<pick>

Syntax

Example

<process>

Syntax

Example

<property>

Syntax

Example

<propertyAlias>

Syntax

Example

<receive>

Syntax

Example

<reply>

Syntax

Example

<scope>

Syntax

Example

<sequence>

Syntax

Example

<source>

Syntax

Example

<switch>, <case>

Syntax

Example

<target>

Syntax

Example

<terminate>

Syntax

Example

<throw>

Syntax

Example

<variables>, <variable>

Syntax

Example

<wait>

Syntax

Examples

<while>

Syntax

Example

BPEL Functions

getLinkStatus()

Syntax

Example

getVariableData()

Syntax

Example

getVariableProperty()

Syntax

Example

Deadline and Duration Expressions

Standard Elements

Syntax

Standard Attributes

Syntax

Default Values of Attributes

Standard Faults

Namespaces

Index