1. PUBLIC PRESENTATION | CLAUS IBSEN1
Using Apache Camel connectors for
external connectivity
Claus Ibsen
Principal Software Engineer, Red Hat
May 2013

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Your Speaker
● Principal Software Engineer at Red Hat
● Apache Camel
● 5 years working with Camel
● Author of Camel in Action book
● Contact
● EMail: cibsen@redhat.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
● Linkedin: http://www.linkedin.com/in/davsclaus

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Agenda
● A little Example
● Understanding Components
● Essential Components
● Creating new Components
● Q and A

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A Little Example
● File Copier Example

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A Little Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example

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A Little Example
● File Copier Example (in XML)

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A Little Example
● File to FTP Example
Files is coped from data/inbox
to a remote FTP server

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A Little Example
● File to FTP Example
How to write this in pure Java code ???

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A Little Example
● File to FTP Example
Easy with Camel
Just use FTP component

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A Little Example
● Camel's Architecture

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A Little Example
120+ Components

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A Little Example
120+ Components

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A Little Example
In fact we have 139 in latest release ...
davsclaus:~/Downloads/apache-camel-2.11.0/lib$ ls camel* | wc -l
139

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A Little Example
… All components on website

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A Little Example
● Summary
● Components for connectivity
● Camel routes with components and EIPs
● Components easy to configure
● A lot of components
● Very composeable
● Learn Once – Can use 'em All

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Agenda
● A little Example
● Understanding Components
● Essential Components
● Creating new Components
● Q and A

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Understanding Components
● Facilitate messaging for connectivity

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Understanding Components
● Facilitate messaging for connectivity
Producer Consumer

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Understanding Components
● … using endpoints via message channels

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Understanding Components
● Component is a factory for creating endpoints
● … and endpoint factory for creating producer and/or
consumers

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Understanding Components
● Component auto discovered
● ... or manually added to CamelContext

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Understanding Components
● Endpoints can be configured using URIs
● … or for example using Java code

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Understanding Components
● Revisit File Copier Example

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Understanding Components
● Revisit File Copier Example

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Understanding Components
● What is a Message in Camel?

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Understanding Components
● … and contained in an Exchange during routing
http://camel.apache.org/using-getin-or-getout-methods-on-exchange.html

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Agenda
● A little Example
● Understanding Components
● Essential Components
● Creating new Components
● Q and A

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Essential Components
● Camel Essential Components Reference Card
http://refcardz.dzone.com/refcardz/essential-camel-components

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Essential Components
● Direct Component

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Essential Components
● SEDA Component
● … beware of InOut over SEDA
(producer will wait for reply default)

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Essential Components
● Bean Component
● … and use <bean> to declare the bean
(standard Spring)

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Essential Components
● … Camel adapts to bean method signature
… using bean parameter binding
● http://camel.apache.org/bean-binding.html
● http://camel.apache.org/parameter-binding-annotations.html

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Essential Components
● Log Component
● Log EIP (human readable message)

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Essential Components
● File and FTP Components
● Exec Component
http://camel.apache.org/how-do-i-use-dynamic-uri-in-to.html

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Essential Components
● ActiveMQ / JMS
Take time to read about JMS at:
http://camel.apache.org/jms

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Essential Components
● ActiveMQ / JMS (cont.)
If using transactions with JMS
make sure to read about
cache levels at:
http://camel.apache.org/jms
http://camel.apache.org/activemq

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Essential Components
● SQL
● … uri is SQL, and body is SQL parameters.
● Externalize queries in .properties file
http://camel.apache.org/sql-example.html

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Essential Components
● JDBC
● … body is SQL and result is List<Map>
(eg like ResultSet)
Improvement on the way: https://issues.apache.org/jira/browse/CAMEL-6367
http://camel.apache.org/sql-example.html

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Essential Components
● Other JDBC Components
● JPA
● Hibernate
● MyBatis
http://camel.apache.org/sql-example.html

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Essential Components
● HTTP/WS/Rest Components
● Jetty / Servlet
● HTTP / HTTP4 / Jetty / AHC
● CXF / Spring-WS
● CXF-RS / Restlet
http://camel.apache.org/sql-example.html

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Essential Components
● TCP/UDP Components
● Mina / Mina2
● Netty
http://camel.apache.org/sql-example.html

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Agenda
● A little Example
● Understanding Components
● Essential Components
● Creating new Components
● Q and A

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Creating new Camel Components
● The big picture

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Creating new Camel Components

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Creating new Camel Components

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Creating new Camel Components
1. execute this maven command
2. type camel to filter only Camel archetypes
3. type number to select “camel-archetype-component” (in this ex its 5)3. type number to select “camel-archetype-component” (in this ex its 5)
4. select the Camel version to use
Geocoder = Java component name
(must be first letter in upper case)
geocoder = Camel component name
(must be lower-case)

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Creating new Camel Components
●
Add 3rd
party library to pom.xml file

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Creating new Camel Components
● Auto discover component
file in META-INF classpath

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Creating new Camel Components
Options as getter/setter
Consumer is not supported

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Creating new Camel Components

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Creating new Camel Components

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Creating new Camel Components
● Running unit test ...

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Agenda
● A little Example
● Understanding Components
● Essential Components
● Creating new Components
● Q and A

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Where do I get more information?
● Where can I get the slides?
http://www.slideshare.net/davsclaus

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Where do I get more information?
● CamelOne 2013 Conference
http://www.camelone.com

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Where do I get more information?
● Getting started with Apache Camel Webinar
● http://fusesource.com
Click on webinars menu
Building superior …

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Where do I get more information?
● Best Article covering what Apache Camel is
● http://java.dzone.com/articles/open-source-integration-
apache
Link to article from “Getting Started”

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Where do I get more information?
● Camel Essential Components Reference Card
http://refcardz.dzone.com/refcardz/essential-camel-components

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Where do I get more information?
● Buy the Camel in Action book
http://manning.com/ibsen/
Use code ...
camel40
… for 40% discount

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Any Questions ?
● Contact
● EMail: cibsen@redhat.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
● Linkedin: http://www.linkedin.com/in/davsclaus