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Programmers guide 5 JBossESB Programmers Guide JBESB-PG- JBESB-PG- CLegal Notices The information contained in this documentation is subject to change without notice JBoss Inc makes no warranty of any kind with regard to this material including but not li

JBossESB Programmers Guide JBESB-PG- JBESB-PG- CLegal Notices The information contained in this documentation is subject to change without notice JBoss Inc makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and ?tness for a particular purpose JBoss Inc shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Java and J EE is a U S trademark of Sun Microsystems Inc Microsoft and Windows NT are registered trademarks of Microsoft Corporation Oracle is a registered U S trademark and Oracle Oracle Server Oracle Enterprise Edition are trademarks of Oracle Corporation Unix is used here as a generic term covering all versions of the UNIX operating system UNIX is a registered trademark in the United States and other countries licensed exclusively through X Open Company Limited Copyright JBoss Home of Professional Open Source Copyright JBoss Inc and individual contributors as indicated by the authors tag All rights reserved See the copyright txt in the distribution for a full listing of individual contributors This copyrighted material is made available to anyone wishing to use modify copy or redistribute it subject to the terms and conditions of the GNU General Public License v This program is distributed in the hope that it will be useful but WITHOUT A WARRANTY without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE See the GNU General Public License for more details You should have received a copy of the GNU General Public License v along with this distribution if not write to the Free Software Foundation Inc Franklin Street Fifth Floor Boston MA - USA Software Version JBossESB Restricted Rights Legend Use duplication or disclosure is subject to restrictions as set forth in contract subdivision c ii of the Rights in Technical Data and Computer Software clause -FAR ? Copyright JBoss Inc CContents Table of Contents Contents iii Building and Using Services About This Guide What This Guide Contains Audience Prerequisites Organization Documentation Conventions Additional Documentation Contacting Us The Enterprise Service Bus What is an ESB When would you use JBossESB JBossESB Rosetta The core of JBossESB in a nutshell Services and Messages Introduction The Service The Message Getting and Setting Data on the Message Body Extensions to Body The Message Header LogicalEPR Default FaultTo Default ReplyTo The Message payload The MessageFactory Message Formats MessageType JAVASERIALIZED MessageType JBOSSXML Listeners Routers Noti ?ers and Actions Listeners Routers Noti ?ers Actions and Messages Handling responses Error handling when processing actions Meta-data and Filters What is a Service ServiceInvoker Transactions Services and ServiceInvoker InVM Transport InVM Scope InVM Transacted Transaction Semantics Threading Lock-step Delivery Load Balancing Pass-by-Value Pass-by- Reference Service Contract De ?nition Message validation Exposing an ESB service as a webservice Other Components Introduction The Message Store Data Transformation Content-based Routing The Registry Example How to use the Message The Message structure The Service Unpicking the payload CThe