Red Hat Summit Red Hat SummitSupportConsoleDéveloppeursCommencer un essaiContact

Ce contenu n'est pas disponible dans la langue sélectionnée.

A.2. Common Elements

Overview
Copier lien

When configuring ServiceMix EIP patterns in a ServiceMix configuration file, there are some common elements that occur in many of the pattern schemas. This section provides a brief overview of these common elements and explains how they can be mapped to equivalent constructs in Apache Camel.

Exchange target
Copier lien

All of the patterns supported by ServiceMix EIP use the eip:exchange-target element to specify JBI target endpoints. Table A.1, “Mapping the Exchange Target Element” shows examples of how to map sample eip:exchange-target elements to Apache Camel endpoint URIs, where it is assumed that the test prefix maps to the http://progress.com/demos/test namespace.
Expand
Table A.1. Mapping the Exchange Target Element
ServiceMix EIP TargetApache Camel Endpoint URI
<eip:exchange-target interface="HelloWorld" /> jbi:interface:HelloWorld
<eip:exchange-target service="test:HelloWorldService" /> jbi:service:http://progress.com/demos/test/HelloWorldService
<eip:exchange-target service="test:HelloWorldService" endpoint="secure" /> jbi:service:http://progress.com/demos/test/HelloWorldService/secure
<eip:exchange-target uri="service:test:HelloWorldService" /> jbi:service:http://progress.com/demos/test/HelloWorldService

Predicates
Copier lien

The ServiceMix EIP component allows you to define predicate expressions in the XPath language. For example, XPath predicates can appear in eip:xpath-predicate elements or in eip:xpath-splitter elements, where the XPath predicate is specified using an xpath attribute.
ServiceMix XPath predicates can easily be migrated to equivalent constructs in Apache Camel: that is, either the xpath element (in XML configuration) or the xpath() command (in Java DSL). For example, the message filter pattern in Apache Camel can incorporate an XPath predicate as follows: 
<route>
  <from uri="jbi:endpoint:http://progress.com/demos/test/messageFilter/endpoint">
  <filter>
   <xpath>count(/test:world) = 1</xpath>
   <to uri="jbi:service:http://progress.com/demos/test/trace3"/>
  </filter>
</route>
Copy to Clipboard Toggle word wrap
Where the xpath element specifies that only messages containing the test:world element will pass through the filter.
Note
Apache Camel also supports a wide range of other scripting languages including XQuery, PHP, Python, and Ruby, which can be used to define predicates. For details of all the supported predicate languages, see Expression and Predicate Languages.

Namespace contexts
Copier lien

When using XPath predicates in the ServiceMix EIP configuration, it is necessary to define a namespace context using the eip:namespace-context element. The namespace is then referenced using a namespaceContext attribute.
When ServiceMix EIP configuration is migrated to Apache Camel, there is no need to define namespace contexts, because Apache Camel allows you to define XPath predicates without referencing a namespace context. You can simply drop the eip:namespace-context elements when you migrate to Apache Camel.
Retour au début
Red Hat logoGithubredditYoutubeTwitter

Apprendre

Essayez, achetez et vendez

Communautés

À propos de la documentation Red Hat

Nous aidons les utilisateurs de Red Hat à innover et à atteindre leurs objectifs grâce à nos produits et services avec un contenu auquel ils peuvent faire confiance. Découvrez nos récentes mises à jour.

Rendre l’open source plus inclusif

Red Hat s'engage à remplacer le langage problématique dans notre code, notre documentation et nos propriétés Web. Pour plus de détails, consultez le Blog Red Hat.

À propos de Red Hat

Nous proposons des solutions renforcées qui facilitent le travail des entreprises sur plusieurs plates-formes et environnements, du centre de données central à la périphérie du réseau.

Theme

© 2025 Red Hat