1. Getting Started with Apache Camel
Claus Ibsen (@davsclaus)
Principal Software Engineer, Red Hat
At Devconf.cz, february 2013
1 PUBLIC PRESENTATION | CLAUS IBSEN

2. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Q and A
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3. 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
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4. What is Apache Camel?
● Quote from the website
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5. What is Apache Camel?
● Why do we need integration?
● Critical for your business to integrate
● Why Integration Framework?
● Framework do the heavy lifting
● You can focus on business problem
● Not "reinventing the wheel"
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6. What is Apache Camel?
● What is Enterprise Integration Patterns?
It's a book
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7. What is Apache Camel?
● Enterprise Integration Patterns
http://camel.apache.org/eip
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8. What is Apache Camel?
● EIP - Content Based Router
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9. What is Apache Camel?
from newOrder
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10. What is Apache Camel?
from newOrder
choice
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11. What is Apache Camel?
from newOrder
choice
when isWidget to widget
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12. What is Apache Camel?
from newOrder
choice
when isWidget to widget
otherwise to gadget
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13. What is Apache Camel?
from(newOrder)
choice
when(isWidget) to(widget)
otherwise to(gadget)
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14. What is Apache Camel?
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);
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15. What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);
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16. What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);
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17. What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);
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18. What is Apache Camel?
● Java Code
public void configure() throws Exception {
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget)
.end();
}
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19. What is Apache Camel?
● Java Code
import org.apache.camel.Endpoint;
import org.apache.camel.Predicate;
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
public void configure() throws Exception {
Endpoint newOrder = endpoint("activemq:queue:newOrder");
Predicate isWidget = xpath("/order/product = 'widget'");
Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget)
.end();
}
}
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20. What is Apache Camel?
● Camel Java DSL
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
public void configure() throws Exception {
from("activemq:queue:newOrder")
.choice()
.when(xpath("/order/product = 'widget'"))
.to("activemq:queue:widget")
.otherwise()
.to("activemq:queue:gadget")
.end();
}
}
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21. What is Apache Camel?
● Camel XML DSL
<route>
<from uri="activemq:queue:newOrder"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>
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22. What is Apache Camel?
use file instead
● Endpoint as URIs
<route>
<from uri="file:inbox/orders"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>
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23. What is Apache Camel?
parameters
● Endpoint as URIs
<route>
<from uri="file:inbox/orders?delete=true"/>
<choice>
<when>
<xpath>/order/product = 'widget'</xpath>
<to uri="activemq:queue:widget"/>
</when>
<otherwise>
<to uri="activemq:queue:gadget"/>
</otherwise>
</choice>
</route>
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24. What is Apache Camel?
● Camel's Architecture
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25. What is Apache Camel?
120+ Components
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26. What is Apache Camel?
120+ Components
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27. What is Apache Camel?
● Summary
● Integration Framework
● Enterprise Integration Patterns (EIP)
● Routing (using DSL)
● Easy Configuration (endpoint as uri's)
● Payload Agnostic
● No Container Dependency
● A lot of components
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28. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Extending Camel
● Q and A
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29. A Little Example
● File Copier Example
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30. A Little Example
● File Copier Example
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31. A Little Example
● File Copier Example
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32. A Little Example
● File Copier Example
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33. A Little Example
● File Copier Example
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34. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Q and A
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35. Riding Camel
● Downloading Apache Camel
● zip/tarball (approx 14mb)
http://camel.apache.org
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36. Riding Camel
● Using Command Shell
● Requires: Apache Maven
● From Eclipse
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37. Riding Camel
● Console Example
● cd examples/camel-example-console
● mvn compile exec:java
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38. Riding Camel
● Twitter Example
● cd examples/camel-example-twitter-websocket
● mvn compile exec:java http://localhost:9090/index.html
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39. Riding Camel
● More examples ...
... and further details at website.
http://camel.apache.org/examples
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40. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the box?
● Deploying Camel
● Creating new Camel Projects
● Q and A
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41. What's in the box?
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42. What's in the box?
● Enterprise Integration Patterns
http://camel.apache.org/eip
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43. What's in the box?
● Splitter EIP
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44. What is Apache Camel?
120+ Components
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45. What is Apache Camel?
19 Data Formats
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46. What is Apache Camel?
15 Expression Languages
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47. What is Apache Camel?
5+ DSL in multiple languages
● Java DSL
● XML DSL (Spring and OSGi Blueprint)
● Groovy DSL
● Scala DSL
● Kotlin DSL (work in progress)
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48. What is Apache Camel?
Test Kit
● camel-test camel-test-spring
● camel-test-blueprint camel-testng
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49. What is Apache Camel?
Management
● JMX
● REST
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50. What is Apache Camel?
Tooling – Web console - HawtIO
http://hawt.io
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51. What is Apache Camel?
Tooling – Eclipse Plugin – Fuse IDE
http://github.com/fusesource/fuseide
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52. What is Apache Camel?
Error Handling
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53. What is Apache Camel?
try .. catch style
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54. What is Apache Camel?
Dead Letter Channel (EIP style)
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55. What is Apache Camel?
The Rest
● Interceptors
● Security
● Route Policy
● Type Converters
● Transaction
● Compensation as rollback
● Asynchronous non-blocking routing engine
● Thread management
● Maven Tooling
● ... and much more
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56. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Extending Camel
● Q and A
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57. Deploying Camel
● Deployment Strategy
● No Container Dependency
● Lightweight & Embeddable
● Deployment Options
● Standalone
● WAR
● Spring
● JEE
● OSGi
● Cloud
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58. Camel as a Client
● Java Client Application (no routes)
● Example
● Upload a file to a FTP server
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59. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Q and A
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60. Creating new Camel Projects
● Using Command Shell
● From Eclipse
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61. Creating new Camel Projects
● Maven Archetypes
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62. Creating new Camel Projects
● camel-archetype-blueprint
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63. Creating new Camel Projects
● Importing into Eclipse
Existing Maven Project
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64. Creating new Camel Projects
● Testing Camel Projects
● ... from inside Eclipse
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65. Agenda
● What is Apache Camel?
● A little Example
● Riding Camel
● What's in the Camel box?
● Deploying Camel
● Creating new Camel Projects
● Q and A
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66. 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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67. Where do I get more information?
● Try Camel Examples
● http://camel.apache.org/examples.html
● Read other blogs and articles
● http://camel.apache.org/articles.html
● Use the “search box” on the Camel front page
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68. Where do I get more information?
● Use the mailing list / forum
● http://camel.apache.org/mailing-lists.html
● Use stackoverflow
● http://stackoverflow.com/questions/tagged/apache-camel
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69. Where do I get more information?
● Buy the Camel in Action book
Use code ...
camel40
… for 40% discount
http://manning.com/ibsen/
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70. Any Questions ?
● Contact
● EMail: cibsen@redhat.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
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