Apache Camel is a very popular integration library that works very well with microservice architecture. This talk introduces you to Apache Camel and how you can easily get started with Camel on your computer. Then we cover how to create new Camel projects from scratch as micro services which you can boot using Camel or Spring Boot, or other micro containers such as Jetty or fat JARs. We then take a look at what options you have for monitoring and managing your Camel microservices using tooling such as Jolokia, and hawtio web console. The second part of this talk is about running Camel in the cloud.We start by showing you how you can use the Maven Docker Plugin to create a docker image of your Camel application and run it using docker on a single host. Then kubernetes enters the stage and we take a look at how you can deploy your docker images on a kubernetes cloud platform, and how the fabric8 tooling can make this much easier for the Java developers. At the end of this talk you will have learned about and seen in practice how to take a Java Camel project from scratch, turn that into a docker image, and how you can deploy those docker images in a scalable cloud platform based on Google's kubernetes.

1. PUBLIC PRESENTATION | CLAUS IBSEN1
Microservices with Apache Camel
Claus Ibsen (@davsclaus)
Principal Software Engineer, Red Hat

2. PUBLIC PRESENTATION | CLAUS IBSEN2
Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

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Your Speaker
● Principal Software Engineer at Red Hat
● Apache Camel
● 7 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
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

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What is Apache Camel?
● Quote from the website

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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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What is Apache Camel?
● What is Enterprise Integration Patterns?
It's a book

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What is Apache Camel?
● Enterprise Integration Patterns
http://camel.apache.org/eip

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What is Apache Camel?
● EIP - Content Based Router

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What is Apache Camel?
from newOrder

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What is Apache Camel?
from newOrder
choice

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What is Apache Camel?
from newOrder
choice
when isWidget to widget

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What is Apache Camel?
from newOrder
choice
when isWidget to widget
otherwise to gadget

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What is Apache Camel?
from(newOrder)
choice
when(isWidget) to(widget)
otherwise to(gadget)

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What is Apache Camel?
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

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What is Apache Camel?
Endpoint newOrder = endpoint("activemq:queue:newOrder");
from(newOrder)
.choice()
.when(isWidget).to(widget)
.otherwise().to(gadget);

17. PUBLIC PRESENTATION | CLAUS IBSEN17
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);

18. PUBLIC PRESENTATION | CLAUS IBSEN18
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);

19. PUBLIC PRESENTATION | CLAUS IBSEN19
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();
}

20. PUBLIC PRESENTATION | CLAUS IBSEN20
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();
}
}

21. PUBLIC PRESENTATION | CLAUS IBSEN21
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();
}
}

22. PUBLIC PRESENTATION | CLAUS IBSEN22
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>

23. PUBLIC PRESENTATION | CLAUS IBSEN23
What is Apache Camel?
● 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>
use file instead

24. PUBLIC PRESENTATION | CLAUS IBSEN24
What is Apache Camel?
● 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>
parameters

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Standard Java or XML
● Java DSL is just Java

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Standard Java or XML
● XML DSL is just XML
● … with XSD schema for validation/tooling

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What is Apache Camel?
● Camel's Architecture

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What is Apache Camel?
150+ Components

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What is Apache Camel?
150+ Components

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What is Apache Camel?
● Summary
● Integration Framework
● Enterprise Integration Patterns (EIP)
● Routing (using DSL)
● Easy Configuration (endpoint as uri's)
● Just Java or XML code
● No Container Dependency
● A lot of components

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Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with Kubernetes
● More Information

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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

37. PUBLIC PRESENTATION | CLAUS IBSEN37
Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

38. PUBLIC PRESENTATION | CLAUS IBSEN38
Microservice Demo - Overview
● camel-archetype-cdi camel-archetype-web
Java Standalone Apache Tomcat
HTTP 8080
from timer
to http
to log
from http
choice
setBody

39. PUBLIC PRESENTATION | CLAUS IBSEN39
Creating new Camel Projects
● Using Command Shell
● From Eclipse

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Creating new Camel Projects
● ... or
JBoss
Forge

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Creating new Camel Projects
● Maven Archetypes
Archetypes Archetypes
camel-archetype-activemq camel-archetype-groovy
camel-archetype-api-component camel-archetype-java
camel-archetype-blueprint camel-archetype-scala
camel-archetype-cdi camel-archetype-scr
camel-archetype-component camel-archetype-spring
camel-archetype-cxf-code-first-blueprint camel-archetype-spring-boot
camel-archetype-cxf-contract-first-blueprint camel-archetype-spring-dm
camel-archetype-dataformat camel-archetype-web

42. PUBLIC PRESENTATION | CLAUS IBSEN42
Creating new Camel Projects
● camel-archetype-cdi
To run from CLI
mvn clean install
exec:java

43. PUBLIC PRESENTATION | CLAUS IBSEN43
Creating new Camel Projects
● add http component
Adds the chosen component
to the pom.xml file.
CMD + ALT
4

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Creating new Camel Projects
● add change route to call http://localhost:8080

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Creating new Camel Projects
● add change bean to return a name

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Creating new Camel Projects
● camel-archetype-web
To run from CLI
mvn clean install
jetty:run

47. PUBLIC PRESENTATION | CLAUS IBSEN47
Microservice Demo - Overview
● camel-archetype-cdi camel-archetype-web
Java Standalone Apache Tomcat
HTTP 8080
from timer
to http
to log
from http
choice
setBody
We are ready to run standalone

48. PUBLIC PRESENTATION | CLAUS IBSEN48
Running Standalone
● camel-archetype-web
● Start Apache Tomcat with bin/catalina run
● Copy the .war to Tomcat deploy folder (myweb.war)

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Running Standalone
● camel-archetype-cdi
● mvn install exec:java

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Monitor using hawtio embedded in Tomcat
● Copy hawtio.war to Tomcat deploy folder

51. PUBLIC PRESENTATION | CLAUS IBSEN51
Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

52. PUBLIC PRESENTATION | CLAUS IBSEN52
Camel and Docker
● Dockerizing your Camel Projects
● Using Roland Huss's Docker Maven Plugin
● https://github.com/rhuss/docker-maven-plugin
.. by manually adding to pom.xml and configure
● ... but we use the Forge

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Camel and Docker
● Dockerizing your Camel Projects with JBoss Forge
● From CLI Add FORGE_HOME/bin to
$PATH

54. PUBLIC PRESENTATION | CLAUS IBSEN54
Camel and Docker
● Dockerizing your Camel Projects with JBoss Forge
● From Eclipse
IDEA
NetBeans
CMD + ALT
4

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Camel and Docker
● Build Docker Containers
● mvn clean install docker:build
● ... Images now in your local docker repository
camel-archetype-cdi
camel-archetype-web
docker-maven-plugin
uses
$DOCKER_HOST
Fabric8 w/ OpenShift 3:
DOCKER_HOST="tcp://vagrant.f8:2375"
Boot2Docker:
DOCKER_HOST="tcp://192.168.59.105:2375"

56. PUBLIC PRESENTATION | CLAUS IBSEN56
Camel and Docker
● Run Docker Containers
● docker run -it -p 8080:8080 -p 8778:8778
172.30.111.183:5000/fabric8/myweb:1.0-SNAPSHOT
The 10.000$$$ Docker Question
What the f$QRC#%A%%EG
is the IP address of the container
8080 = Tomcat
8778 = Jolokia

57. PUBLIC PRESENTATION | CLAUS IBSEN57
Camel and Docker
● What is the IP Address of the Docker Container

58. PUBLIC PRESENTATION | CLAUS IBSEN58
Camel and Docker
● camel-archetype-cdi
● I would need to change the hostname to
the docker assigned IP address

59. PUBLIC PRESENTATION | CLAUS IBSEN59
Camel and Docker
● camel-archetype-cdi
● .. and then build the docker image
● And then run the docker image
● docker run -it 172.30.111.183:5000/fabric8/mycdi:1.0-
SNAPSHOT

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Camel and Docker
● Pheeew isn't this easier?
Yes !!!

61. PUBLIC PRESENTATION | CLAUS IBSEN61
Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

62. PUBLIC PRESENTATION | CLAUS IBSEN62
Microservices Demo - Recap
● camel-archetype-cdi camel-archetype-web
Java Standalone Apache Tomcat
HTTP 8080
from timer
to http
to log
from http
choice
setBody

63. PUBLIC PRESENTATION | CLAUS IBSEN63
Microservices Demo - Use Service
● camel-archetype-cdi camel-archetype-web
Java Standalone Apache Tomcat
from timer
to http
to log
from http
choice
setBody
Service
Kubernetes
Service

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What is a Kubernetes Service
● Kubernetes Service
http://fabric8.io/guide/services.html

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Define Kubernetes Service
● Define in pom.xml in <properties>
Apache Tomcat
from http
choice
setBody
Service
Container Port = Inside Docker Container
(e.g. the port of Apache Tomcat)
Service Port = Outside
Consumers of Service to use
Name of service

66. PUBLIC PRESENTATION | CLAUS IBSEN66
Define Kubernetes Service
● ... generates into kubernetes.json
using fabric8:json plugin
Apache Tomcat
from http
choice
setBody
Service

67. PUBLIC PRESENTATION | CLAUS IBSEN67
About using Kubernetes Service
Discover Kubernetes Services
Java Standalone
from timer
to http
to log

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Client - Use Kubernetes Service
● Use {{service:name}} in Camel
... you can use default values
{{service:name:host:port}}
Java Standalone
from timer
to http
to log
host:port would be default
if service is not discovered

69. PUBLIC PRESENTATION | CLAUS IBSEN69
Microservice Demo - Ready for launch!
● camel-archetype-cdi camel-archetype-web
Java Standalone Apache Tomcat
from timer
to http
to log
from http
choice
setBody
Service
Service defined
Ready to deploy to Kubernetes

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Deploy - camel-archetype-web
● camel-archetype-web
● mvn clean install docker:build
fabric8:apply Apache Tomcat
from http
choice
setBody
Service

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Deploy - camel-archetype-cdi
● camel-archetype-cdi
● mvn clean install docker:build
fabric8:apply Java Standalone
from timer
to http
to log

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fabric8 web console
● http://fabric8.vagrant.f8
● Easy by configuring the replication size

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OpenShift 3 CLI
● oc get pods
docker CLI is also possible
docker images
docker ps

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OpenShift 3 CLI
● oc get services

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OpenShift 3 CLI
● oc logs -f <pod-name>

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Scaling up / down
● ... by changing replication size on controller

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Scaling up / down
● web console shows we now have 3 pods

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Scaling up / down
● and the camel-archetype-cli pod is load balancing the
mycoolservice among the 3 live pods

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Agenda
● What is Apache Camel?
● A little Example
● Microservice Demo
● Standalone
● with Docker
● with OpenShift / Kubernetes
● More Information

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Where do I get more information?
● Apache Camel Microservices
● http://camel.apache.org/camel-boot
● Fabric8
● http://fabric8.io
● chat room #fabric-8 on freenode
● OpenShift 3
● https://github.com/openshift/origin
● Kubernetes
● https://github.com/googlecloudplatform/kubernetes

81. PUBLIC PRESENTATION | CLAUS IBSEN81
Any Questions ?
● Contact
● EMail: cibsen@redhat.com / claus.ibsen@gmail.com
● Twitter: @davsclaus
● Blog: http://davsclaus.com
● Linkedin: http://www.linkedin.com/in/davsclaus