Getting started with Apache Camel presentation at BarcelonaJUG, january 2014

Getting Started with Apache Camel.
Presentation and Workshop at
BarcelonaJUG, January 2014

Claus Ibsen (@davsclaus)
Principal Software Engineer, Red Hat
1

PUBLIC PRESENTATION | CLAUS IBSEN

Agenda
●

●

What is Apache Camel?

●

A little Example

●

Riding Camel

●

What's in the Camel box?

●

Deploying Camel

●

Creating new Camel Projects

●

What's not in the Camel box?

●

2

History of Camel

More Information

Your Speaker
●

Principal Software Engineer at Red Hat

●

Apache Camel
●

6 years working with Camel

●

Author of Camel in Action book

●

Contact
●
●

Twitter: @davsclaus

●

Blog: http://davsclaus.com

●

3

EMail: cibsen@redhat.com

Linkedin: http://www.linkedin.com/in/davsclaus


Why the name Camel?

4


Why the name Camel?

Because Camel is
easy to remember and type ...
5


Why the name Camel?

… or the creator used to smoke cigarets!
http://camel.apache.org/why-the-name-camel.html
6


Camel's parents

7


Camel's parents

James Strachan (creator of Camel)
Gregor Hohpe (author of EIP book)

8


The birth of Camel
●

9

First Commit


The birth of Camel
●

10

My first Commit


The birth of Camel
●

First Release
●

Apache Camel 1.0
June 2007

http://www.davsclaus.com/2012/05/looking-at-impressive-first-apache.html
11


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

12


●

13

Quote from the website


●

Why do we need integration?
●

●

Critical for your business to integrate

Why Integration Framework?
●
●

You can focus on business problem

●

14

Framework do the heavy lifting
Not "reinventing the wheel"


●

What is Enterprise Integration Patterns?

It's a book
15


●

Enterprise Integration Patterns

http://camel.apache.org/eip
16


●

17

EIP - Content Based Router



from newOrder

18



from newOrder
choice

19



from newOrder
choice
when isWidget to widget

20



from newOrder
choice
when isWidget to widget
otherwise to gadget

21



from(newOrder)
choice
when(isWidget) to(widget)
otherwise to(gadget)

22



from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

23



Endpoint newOrder = endpoint("activemq:queue:newOrder");

from(newOrder)
.choice()

24



Predicate isWidget = xpath("/order/product = 'widget'");

from(newOrder)
.choice()

25



Endpoint widget = endpoint("activemq:queue:widget");
Endpoint gadget = endpoint("activemq:queue:gadget");
from(newOrder)
.choice()

26


●

Java Code

public void configure() throws Exception {
from(newOrder)
.choice()
.otherwise().to(gadget)
.end();
}
27


●

Java Code
import org.apache.camel.Endpoint;
import org.apache.camel.Predicate;
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
from(newOrder)
.choice()
.otherwise().to(gadget)
.end();
}
}

28


●

Camel Java DSL
import org.apache.camel.builder.RouteBuilder;
public class MyRoute extends RouteBuilder {
from("activemq:queue:newOrder")
.choice()
.when(xpath("/order/product = 'widget'"))
.to("activemq:queue:widget")
.otherwise()
.to("activemq:queue:gadget")
.end();
}
}

29


●

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>

30


●

Endpoint as URIs

use file instead

<route>
<from uri="file:inbox/orders"/>
<choice>
<when>
</when>
<otherwise>
</otherwise>
</choice>
</route>

31


parameters
●

Endpoint as URIs
<route>
<from uri="file:inbox/orders?delete=true"/>
<choice>
<when>
</when>
<otherwise>
</otherwise>
</choice>
</route>

32


Standard Java or XML
●

33

Java DSL is just Java


Standard Java or XML
●

XML DSL is just XML

●

34

… with XSD schema for validation/tooling


●

35

Camel's Architecture


150+ Components

36


150+ Components

37


●

Summary
●
●

Enterprise Integration Patterns (EIP)

●

Routing (using DSL)

●

Easy Configuration (endpoint as uri's)

●

Just Java or XML code

●

No Container Dependency

●

38

Integration Framework

A lot of components


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

39


A Little Example
●

40

File Copier Example


A Little Example
●

41

File Copier Example


A Little Example
●

42

File Copier Example


A Little Example
●

43

File Copier Example


A Little Example
●

44

File Copier Example


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

45


Riding Camel
●

Downloading Apache Camel
●

zip/tarball (approx 8mb)

http://camel.apache.org

46


Riding Camel
●

Using Command Shell
●

●

47

Requires: Apache Maven

From Eclipse


Riding Camel
●

Console Example

●

cd examples/camel-example-console

●

mvn compile exec:java

48


Riding Camel
●

Twitter Example

●

cd examples/camel-example-twitter-websocket

●

mvn compile exec:java

49

http://localhost:9090/index.html


Riding Camel
●

More examples ...

... and further details at website.
http://camel.apache.org/examples

50


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●

What's in the box?

●

Deploying Camel

●


●


●

More Information

51


What's in the box?

52


What's in the box?
●

Enterprise Integration Patterns

http://camel.apache.org/eip
53


What's in the box?
●

54

Pipes and Filters EIP


What's in the box?
●

55

Pipes and Filters EIP


What's in the box?
●

56

Recipient List EIP


What's in the box?
●

57

Recipient List EIP


What's in the box?
●

58

Splitter EIP


What's in the box?
150+ Components

59


What's in the box?
19 Data Formats

60


What's in the box?
15 Expression Languages

61


What's in the box?
5+ DSL in multiple languages
●
●

XML DSL (Spring and OSGi Blueprint)

●

Groovy DSL

●

Scala DSL

●

62

Java DSL

Kotlin DSL (work in progress)


What's in the box?
●

Mixing Java and XML

●

●

63

Java DSL

Spring XML file


What's in the box?
●

Mixing Java and XML
●

.. having both XML and Java routes

Java route

XML route
64


What's in the box?
●

Multiple XML files

myCoolRoutes.xml
myOtherCoolRoutes.xml

myCamel.xml
65


What's in the box?
●

Scanning on classpath for Java routes
●

●

66

… with packageScan

… supports excludes/includes


What's in the box?
●

Scanning Spring ApplicationContext for Java routes
●

67

… with <contextScan/>


What's in the box?
●

Scanning Spring ApplicationContext for Java routes
●

68

… and routes uses @Component


What's in the box?
●

69

Type Converters


What's in the box?
●

70

Writing Custom Type Converter


What's in the box?
●

71

Bean as Message Translator


What's in the box?
●

72

Bean as Message Translator


What's in the box?
●

73

Working with beans


What's in the box?
●

74

Working with beans


What's in the box?
●

75

Working with beans


What's in the box?
●

76

Working with beans


What's in the box?
Test Kit
●

camel-test-spring

●

77

camel-test
camel-test-blueprint

camel-testng


What's in the box?
Management
●
●

78

JMX
REST (w/ Jolokia)


What's in the box?
Error Handling

79


What's in the box?
try .. catch style

80


What's in the box?
Dead Letter Channel (EIP style)

81


What's in the box?
Dead Letter Channel (EIP style)

82


What's in the box?
The Rest
●

Interceptors

●

Security

●

Route Policy

●

Type Converters

●

Transaction
●

Compensation as rollback

●
●

Thread management

●

Maven Tooling

●

83

Asynchronous non-blocking routing engine

... and much more

Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

84


Deploying Camel
●

Deployment Strategy
●
●

●

No Container Dependency
Lightweight & Embeddable

Deployment Options
●
●

WAR

●

Spring

●

JEE

●

OSGi

●

85

Standalone

Cloud

Camel as a Client
●

Java Client Application (no routes)

●

Example
●

86

Upload a file to a FTP server


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

87


●

Using Command Shell

●

From Eclipse

88


●

89

Maven Archetypes


●

90

camel-archetype-blueprint


●

Importing into Eclipse

Existing Maven Project

91


●

Testing Camel Projects

●

... from inside Eclipse

92


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

93


●

3rd party Apache Camel software

●

Commercial Support
●

●

User Stories
●

●

http://camel.apache.org/user-stories.html

External Components
●

●

http://camel.apache.org/commercial-camel-offerings.html

http://camel.apache.org/components.html (bottom)

Apache Camel Extra
●

94

https://code.google.com/a/apache-extras.org/p/camel-extra

Tooling – Eclipse Plugin – Fuse IDE

http://github.com/fusesource/fuseide
95


Tooling – Web console - HawtIO

http://hawt.io
96


●

Integration Platform

http://fabric8.io
97


Agenda
●

History of Camel

●


●

A little Example

●

Riding Camel

●


●

Deploying Camel

●


●


●

More Information

98


Where do I get more information?
●

Best Article covering what Apache Camel is
●

http://java.dzone.com/articles/open-source-integrationapache

Link to article from “Getting Started”

99


●

Try Camel Examples
●

●

Read other blogs and articles
●

●

100

http://camel.apache.org/examples.html

http://camel.apache.org/articles.html

Use the “search box” on the Camel front page


●

Use the mailing list / forum
●

●

Use stackoverflow
●

●

http://stackoverflow.com/questions/tagged/apache-camel

Use IRC chat
●

101

http://camel.apache.org/mailing-lists.html

http://camel.apache.org/irc-room.html


●

Buy the Camel in Action book

Use code ...
camel40
… for 40% discount

http://manning.com/ibsen/

102


●

.. and/or any of the other Camel books in the market

http://camel.apache.org/books

103


●

Attend the CamelOne conferences

The conference formerly known as CamelOne,
is now part of larger conference named DevNation

http://www.devnation.org

104


Any Questions ?

●

Contact
●
EMail: cibsen@redhat.com / claus.ibsen@gmail.com
●
Twitter: @davsclaus
●
Blog: http://davsclaus.com
●
Linkedin: http://www.linkedin.com/in/davsclaus

105


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