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WS-BPEL 2.0 Beginner's Guide

WS-BPEL 2.0 Beginner's Guide

By : Matjaz B Juric
4.8 (5)
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WS-BPEL 2.0 Beginner's Guide

WS-BPEL 2.0 Beginner's Guide

4.8 (5)
By: Matjaz B Juric
Buy this Book

Overview of this book

If you are a software architect, a designer, a software developer, an SOA and BPM architect, a project manager, or a business process analyst who is responsible for the design and development of business processes, composite applications, and BPM/SOA solutions, then this book is for you. You should have a clear grasp of general SOA concepts including business processes and web services, but no prior knowledge of the BPEL language is required.
Table of Contents (14 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Time for action – heading
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Hello BPEL
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1. Hello BPEL
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Introduction to BPEL
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Installing Oracle JDeveloper and SOA Suite
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Time for action – installing the JDK and setting environment
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Time for action – installing JDeveloper and SOA Suite
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Time for action – creating a default domain
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Developing our first BPEL process
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Time for action – creating the SOA composite application
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Time for action – creating XML Schema for the BPEL process
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Time for action – modifying WSDL
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Time for action – implementing the BPEL process
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Deploying the first BPEL process
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Time for action – deploying the BPEL process
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Testing our first BPEL process
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Time for action – testing the BPEL process
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Understanding the BPEL language
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The BPEL structure
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Bookstore BPEL process with branches
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Time for action – more sophisticated BPEL process
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Time for action – deploying and testing the second BPEL process
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Summary
2
2. Service Invocation
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2. Service Invocation
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Service invocation and orchestration
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Developing the book warehousing process
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Time for action – creating the book warehousing process
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Time for action – developing the book warehousing process
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Understanding sequential invocation
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Understanding partner links
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Parallel service invocation
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Time for action – developing parallel flows
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Understanding a parallel flow
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Summary
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3. Variables, Data Manipulation, and Expressions
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3. Variables, Data Manipulation, and Expressions
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Variables in BPEL
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Variables in BookWarehousingBPEL
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Time for action – review of existing variables
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Time for action – creating XML type variables
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Time for action – creating XML element variables
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Time for action – creating a message type variable
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Data manipulation and assignments
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Time for action – copying variables
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Expressions
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Time for action – copying variable parts
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Manipulating data for external partner links
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Time for action – creating the AnotherBookstoreBPEL process
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Time for action – extending the BookWarehousing process
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Validating variables
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Time for action – validating variables
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The XSLT transformations
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Time for action – using XSLT transformations
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Summary
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4. Conditions and Loops
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4. Conditions and Loops
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Conditions
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Time for action – selecting the bookstore with the lowest quantity
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Time for action – implementing VintageBookstore
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Time for action – selecting VintageBookstore
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Loops
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Adding loops to our example
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Time for action – adding the BookOrderManagement process
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Time for action – adding the loop
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Time for action – the loop
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Executing in parallel
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Time for action – executing in parallel
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Delays
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Time for action – adding
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Ending a process
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Empty activities
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Summary
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5. Interaction Patterns in BPEL
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5. Interaction Patterns in BPEL
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Understanding asynchronous invocations
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Time for action – implementing an asynchronous invocation
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Understanding asynchronous service invocations
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Time for action – creating an asynchronous BPEL process
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Summary
6
6. Fault Handling and Signaling
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6. Fault Handling and Signaling
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Introducing faults and fault handlers
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Time for action – adding fault handlers
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Modeling execution errors with WS-BPEL 2.0 standard faults
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Modeling logical (explicit) errors with the activity
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Modeling errors propagated from external web services
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Understanding fault handlers and signaling
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WSDL faults
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Handling faults
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In-line fault handling
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Time for action – signaling faults
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Summary
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7. Working with Scopes
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7. Working with Scopes
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Introducing scopes
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Time for action – adding scopes
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Time for action – the fault and termination handlers
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Summary
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8. Dynamic Parallel Invocations
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8. Dynamic Parallel Invocations
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Introducing dynamic parallel invocations
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Time for action – adding a activity
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Time for action – configuring the activity within a activity
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Time for action – initializing the input variable within a activity
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Initializing a dynamic partner link
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Time for action – initializing a dynamic partner link
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Time for action – appending multiple values to a variable
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Summary
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9. Human Tasks
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9. Human Tasks
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Understanding human tasks
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Preparing an asynchronous example
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Adding a human task to the BookWarehousingBPEL process
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Time for action – creating a human task definition
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Time for action – configuring the human task title
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Time for action – specifying a human task payload
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Time for action – assigning a human task
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Time for action – configuring human task deadlines
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Time for action – configuring human task notifications
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Time for action – invoking a human task from the BPEL process
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Time for action – configuring human task case branches
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Time for action – creating human task forms
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Deploying and testing human tasks
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Time for action – deploying the human task
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Time for action – testing the human task
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Summary
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10. Events and Event Handlers
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10. Events and Event Handlers
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Understanding events
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Developing an event-driven BPEL process
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Time for action – declaring a business event
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Time for action – developing an event-driven book shelving BPEL process
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Triggering a business event from a BPEL process
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Time for action – triggering BookshelfEvent from the book warehousing BPEL process
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Adding an event handler to the Book Warehousing BPEL process
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Time for action – adding an event handler to the BPEL process
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Time for action – adding onEvent to the callback interface
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Time for action – specifying alarm event handler activities
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Time for action – adding a message handler to the BPEL process
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Time for action – declaring the cancel operation on the BPEL process interface
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Time for action – specifying message event activities
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Asynchronous invocations and events
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Time for action – invoking the WarehousingConfirmation service
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Time for action – waiting for callback
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Time for action – waiting for onFault and onEvent callbacks
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Time for action – adding an alarm event for callback
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Summary
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11. Compensations
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11. Compensations
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Introducing compensation in business processes
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Time for action – adding compensation handlers
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Time for action – triggering a fault within the BPEL process
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Time for action – triggering compensation for the BPEL process
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Summary
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A. Pop Quiz Answers
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Chapter 1, Hello BPEL
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Chapter 2, Service Invocation
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Chapter 3, Variables, Data Manipulation, and Expressions
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Chapter 4, Conditions and Loops
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Chapter 5, Interaction Patterns in BPEL
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Chapter 6, Fault Handling and Signaling
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Chapter 7, Working with Scopes
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Chapter 8, Dynamic Parallel Invocations
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Chapter 9, Human Tasks
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Chapter 10, Events and Event Handlers
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Chapter 11, Compensations
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Index
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Index

Time for action – installing the JDK and setting environment

Perform the following steps to download and install the JDK:

  1. Go to http://www.oracle.com/technetwork/java/javase/downloads/index.html and download and install the latest version of Java SE 7 Java Platform, Standard Edition. Currently, this is Java SE 7u60. You need to download the JDK (and not JRE or Server JRE).
  2. Install the JDK. On Windows, you will need to double-click on the installation file and you will be guided through the install process. On Linux, you will have to execute the install from the command shell, as shown in the following screenshot:
    Time for action – installing the JDK and setting environment
  3. Finally, we need to set the JAVA_HOME and ORACLE_HOME environment variables. On Linux, you need to write the following command:
    JAVA_HOME=$HOME/top_level_folder_jdkversion
export JAVA_HOME
ORACLE_HOME=%HOME/Oracle/Middleware/Oracle_Home
export ORACLE_HOME

    On Windows, write the following command:

    SET JAVA_HOME=%USERPROFILE%\top_level_folder_jdkversion
SET ORACLE_HOME=%USERPROFILE%\Oracle\Middleware\Oracle_Home

What just happened?

We installed the JDK and set the environment variables, JAVA_HOME and ORACLE_HOME, which are required for the JDK and SOA Suite.

You can check the JDK installation with a simple java –version command, which will print the JDK version and the virtual machine version:

What just happened?

Installing SOA Suite with JDeveloper

The easiest way to start using both products is to download a free SOA Suite 12c installation available at http://www.oracle.com/technetwork/middleware/soasuite/downloads/index.html.

We will use a quick-start installation. The quick-start installation will contain all the following software required for a development environment on a single host:

  • JDeveloper with SOA IDE extensions
  • BPEL Process Manager
  • Human Workflow
  • Business Rules
  • Mediator
  • Service Bus
  • Technology Adapters
  • Enterprise Scheduler
  • SOA Spring Component
  • Enterprise Manager Fusion Middleware Control
  • Integrated WebLogic Server
  • Java DB

The quick-start installation is the quickest way to start developing and testing the BPEL processes using SOA Suite and JDeveloper and exactly what most developers need (and what we need for this book).

Please note that the quick-start installation is limited to one server and cannot be upgraded to a production environment. A production environment requires a much more complex installation, described at http://docs.oracle.com/middleware/1213/core/INSOA/planning.htm.

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