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  • Book Overview & Buying Oracle Service Bus 11g Development Cookbook
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Oracle Service Bus 11g Development Cookbook

Oracle Service Bus 11g Development Cookbook

4.3 (9)
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Oracle Service Bus 11g Development Cookbook

Oracle Service Bus 11g Development Cookbook

4.3 (9)
Buy this Book

Overview of this book

Oracle Service Bus 11g is a scalable SOA integration platform that delivers an efficient, standards-based infrastructure for high-volume, mission critical SOA environments. It is designed to connect, mediate, and manage interactions between heterogeneous services, legacy applications, packaged solutions and multiple Enterprise Service Bus (ESB) instances across an enterprise-wide service network. Oracle Service Bus is a core component in the Oracle SOA Suite as a backbone for SOA messaging. This practical cookbook shows you how to develop service and message-oriented (integration) solutions on the Oracle Service Bus 11g. Packed with over 80 task-based and immediately reusable recipes, this book starts by showing you how to create a basic OSB service and work efficiently and effectively with OSB. The book then dives into topics such as messaging with JMS transport, using EJB and JEJB transport, HTTP transport and Poller transports, communicating with the database, communicating with SOA Suite and Reliable Message Processing amongst others. The last two chapters discuss how to achieve message and transport-level security on the OSB.
Table of Contents (19 chapters)
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Oracle Service Bus 11g Development Cookbook
Oracle Service Bus 11g Development Cookbook
Credits
Credits
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Creating a basic OSB service
Creating a basic OSB service
Introduction
Creating a new OSB project
Defining a folder structure for the OSB project
Importing an already existing project into Eclipse OEPE
Creating a business service to call an external SOAP-based web service
Generating a simple pass-through proxy service
Deploying the OSB configuration from Eclipse OEPE
Testing the proxy service through the OSB console
Testing the proxy service through soapUI
Creating proxy service with a WSDL based interface
Using a routing action to statically route to another service
Adding an operational branch to support the different WSDL operations of the proxy service
Using an XQuery transformation to map between the different data models of the services
2
Working Efficiently with OSB Artifacts in Eclipse OEPE
Working Efficiently with OSB Artifacts in Eclipse OEPE
Introduction
Setting up an OSB project to work with JCA adapters
Using context menu to add nodes and actions to message flow
Moving nodes/actions in Eclipse OEPE by drag-and-drop
Copying nodes/actions from one place to another
Moving artifacts inside the same OSB project
Copying artifacts from one project into another
Debugging services through Eclipse OEPE
3
Messaging with JMS Transport
Messaging with JMS Transport
Introduction
Sending a message to a JMS queue/topic
Changing JMS Transport message headers and properties at runtime
Consuming messages from a JMS queue
Consuming messages from a topic with non-durable/durable subscription
Consuming messages from a JMS queue/topic selectively
Accessing JMS Transport headers and properties in message flow
Using request-response messaging with JMS
Using QBrowser Admin GUI for accessing JMS queues/topics
Testing JMS with soapUI
4
Using EJB and JEJB transport
Using EJB and JEJB transport
Introduction
Exposing an EJB session bean as a service on the OSB using the EJB transport
Using JNDI Provider to invoke an EJB session bean on a remote WebLogic domain
Using converter class with EJB transport to help converting data types
Exposing an EJB session bean as an EJB on the OSB using the JEJB transport
Manipulating the response of the JEJB transport by a Java Callout action
5
Using HTTP Transport
Using HTTP Transport
Introduction
Using HTTP transport to implement messaging over HTTP
Exposing a RESTful service on the OSB
Consuming a RESTful service from the OSB
Creating a generic RESTful gateway on the OSB
Implementing a WebSockets transport for server-side push
6
Using File and Email Transports
Using File and Email Transports
Introduction
Using the File or FTP transport to trigger a proxy service upon arrival of a new file
Using the File JCA adapter to read a file within the message flow
Using the File Transport to write to a file
Using Email Transport to receive e-mail
Using Email Transport to send e-mail
7
Communicating with the Database
Communicating with the Database
Introduction
Using DB adapter to read from a database table
Using DB adapter to execute a custom SQL statement against the database
Using the DB adapter to update a database table
Using DB adapter to poll for changes on a database table
Using the AQ adapter to consume messages from the database
Using the AQ adapter to send messages to the database
8
Communicating with SOA Suite
Communicating with SOA Suite
Introduction
Invoking a SCA composite synchronously from an OSB service
Invoking a SCA composite asynchronously from an OSB service
Invoking an OSB service from SCA composite synchronously
Invoking an OSB service from SCA composite asynchronously
9
Communication, Flow Control, and Message Processing
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Communication, Flow Control, and Message Processing
Introduction
Using Service Callout action to invoke a service
Using the Publish action to asynchronously invoke a service
Using the Java Callout action to invoke Java code
Using the Java Callout action with XMLBeans
Using custom XPath functions
Using the For Each action to process a collection
Using dynamic Split-Join to perform work in parallel
Using the Validate action to perform message validation
Enabling/disabling a Validate action dynamically
Creating private proxy service
10
Reliable Communication with the OSB
Reliable Communication with the OSB
Introduction
Configuring Retry handling in JMS
Enabling JMS message persistence
Working with global transactions and quality of service
Using WS-Reliable Messaging (WS-RM) with WS transport
SOAP over JMS
11
Handling Message-level Security Requirements
Handling Message-level Security Requirements
Introduction
Preparing OSB server to work with OWSM
Configuring OSB server for OWSM
Securing a proxy service by Username Token authentication
Securing a proxy service by protecting the message
Securing a proxy service by using Username Token authentication and protecting the message
Securing a proxy service by using certificate authentication and protecting the message
Securing a proxy service with authorization through Message Access Control
Using JDeveloper to test a secured service
Calling a secured service from OSB
12
Handling Transport-level Security Requirements
Handling Transport-level Security Requirements
Introduction
Using service accounts with OSB
Configuring WebLogic network connection filters
Preparing OSB server to work with SSL
Configuring a proxy service to use HTTPS security
Index
Index

Using custom XPath functions

In this recipe, we will show how to implement custom XPath functions, which extends the collection of XPath functions available with the OSB platform. We will use the same functionality that we used in the Using the Java Callout action to invoke Java code recipe, but now make the calculate checksum functionality available as an XPath function.

Getting ready

You can import the OSB project containing the base setup for this recipe into Eclipse OEPE from \chapter-9\getting-ready\using-custom-xpath-function.

How to do it...

First we have to create the Java functionality we like to expose as a custom XPath function. We will reuse the same Java class we used in the Using the Java Callout action to invoke Java code recipe which is shown here:

package osbcookbook.util.checksum;

import java.util.zip.CRC32;
import java.util.zip.Checksum;

public class ChecksumUtil {
  public static long calculateChecksum(String data) {
    Checksum checksum = new CRC32();
    checksum.update...

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