Intro Camel

8/10/2019 Intro Camel

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Introduction to Apache Camel

Claus IbsenPrincipal Software Engineer, FuseSource

September 2010


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2010 Progress Software Corporation3

Today's speaker - Claus Ibsen

Principal Software Engineer at FuseSource Full time Apache Camel hacker

Apache Camel committer

Co-author of Camel in Action book

Available in late 2010

Contact

[email protected]

http://davsclaus.blogspot.com/

http://twitter.com/davsclaus

http://www.manning.com/ibsen
mailto:[email protected]://davsclaus.blogspot.com/http://twitter.com/davsclaushttp://www.manning.com/ibsen/http://www.manning.com/ibsen/http://twitter.com/davsclaushttp://davsclaus.blogspot.com/mailto:[email protected]


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Why the name Camel?

Camel is easy to remember and type



Agenda

The birth of Apache Camel What is Apache Camel

A little example

What's included in the box?

Running Camel

Another Example

The Camel Community

Q and A



The birth of Apache Camel

Camels parents




Initial Commit Logr519901 | jstrachan | 2007-03-19 11:54:57 +0100

(Mon, 19 Mar 2007) | 1 line

Initial checkin of Camel routing library

Apache Camel 1.0 released June 2007

Apache Camel is 3 years old


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My initial commit

r640963 | davsclaus | 2008-03-25 21:07:10 +0100

(Tue, 25 Mar 2008) | 1 line

Added unit test for mistyped URI

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Wh i A h C l


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10 2010 Progress Software Corporation

What is Apache Camel

Quote from the web site

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Apache Camel is a

Powerful Open SourceIntegration Framework

based on known

Enterprise Integration Patterns

Wh t i A h C l


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Why do we need Integration? Your apps are build using different tech stacks

Critical for your business to integrate

Why Integration Framework?

Framework do the heavy lifting Focus on business problem

Not "reinventing the wheel"

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Wh t i A h C l


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What is Enterprise Integration Patterns?

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What is Enterprise Integration Patterns?

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Its a boo k



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Lets look at one of the patterns

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Use Case

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ActiveMQ WebSphereMQ



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Filter Pattern

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Filter Pattern

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from(A) to(B)filter(predicate)


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Filter Route

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isWidget = xpath(/quote/product = widget);

from(A).filter(isWidget).to(B);



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p

Filter Route

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Endpoint A = endpoint(activemq:queue:quote);

Endpoint B = endpoint(mq:quote);

Predicate isWidget = xpath(/quote/product = widget);




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p

Filter Route - Java DSL

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public void configure() throws Exception {

Endpoint A = endpoint("activemq:queue:quote");

Endpoint B = endpoint("mq:quote");Predicate isWidget = xpath("/quote/product = widget");


}



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p


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import org.apache.camel.builder.RouteBuilder;

import static org.apache.camel.builder.xml.XPathBuilder.xpath;

public class FilterRoute extends RouteBuilder {


Endpoint A = endpoint("activemq:queue:quote");

Endpoint B = endpoint("mq:quote");

Predicate isWidget = xpath("/quote/product = widget");

from(A).filter(isWidget).to(B);}

}



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import org.apache.camel.builder.RouteBuilder;

public class FilterRoute extends RouteBuilder {


from("activemq:queue:quote")

.filter().xpath("/quote/product =widget")

.to("mq:quote");

}

}



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IDE Tooling

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Code

Assistance

JavaDoc



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IDE Tooling

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Code

Assistance



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Lets look at the most famous pattern

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Content Based Router

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Content Based Router - Spring XML

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/order/product = 'widget'



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Content Based Router - Java DSL

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from("activemq:NewOrders")

.choice()

.when().xpath(/order/product = 'widget')

.to(activemq:Orders.Widget)

.otherwise()

.to(acitvemq:Orders.Gadget);



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Summary

Camel is an integration framework

Based on Enterprise Integration Patterns

Routing and mediation

Easy to use DSL to define routes

No heavy specification

No container dependency

Payload agnostic

Connectivity to a great wealth of transports

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Mission Statement

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Making integration easier andmore accessible to developers

Agenda


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35 2010 Progress Software Corporation35



A little example


Running CamelAnother Example

The Camel Community

Q and A


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A little example


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Goals using Enterprise Integration Patterns

Goals

1) Pickup files from a directory

2) Make sure we only pickup 3 files per 30 seconds 3) Store into JMS queue

4) Listen on JMS queue

5) And upload file to FTP server

1 2 3 4 5


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A little example


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Camel DSL in XML

Agenda


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A little example


Running CamelAnother Example

The Camel Community

Q and A



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Highlights of whats included in Camel

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50+ EIP patterns

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http://camel.apache.org/enterprise-integration-patterns.html



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70+ Components

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activemq crypto flatpack irc ldap

activemq-journal cxf freemarker javaspace mail/imap/pop3

amqp cxfrs ftp/ftps/sftp jbi mina

atom dataset gae jcr mock

bean direct hdfs jdbc msv

bean validation esper hibernate jetty nagios

browse event hl7 jms netty

cache exec http jpa nmr

cometd file ibatis jt/400 printer

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

http://activemq.apache.org/camel/components.htmlhttp://activemq.apache.org/camel/components.html


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70+ Components

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properties scalate stream xslt

quartz seda string-template ejb

quickfix servlet test

ref smooks timer

restlet smpp validation

rmi snmp velocity

rnc spring-integration vm

rng spring-security xmpp

rss sql xquery

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

http://activemq.apache.org/camel/components.htmlhttp://activemq.apache.org/camel/components.html


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18 Data Formats

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bindy protobuf

castor serialization

csv soap

crypto tidy markupflatpack xml beans

gzip xml security

hl7 xstream

jaxb zipjson dozer

http://camel.apache.org/data-format.html

http://activemq.apache.org/camel/components.htmlhttp://activemq.apache.org/camel/components.htmlhttp://activemq.apache.org/camel/components.htmlhttp://activemq.apache.org/camel/components.html


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Data Format

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from("activemq:QueueWithJavaObjects)

.marshal().jaxb()

.to("mq:QueueWithXmlMessages");



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Predicates & Expressions

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BeanShell PHP

EL Python

Groovy Ruby

JavaScript Simple

JSR 223 SQL

OGNL XPath

MVEL XQuery

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

http://camel.apache.org/languages.htmlhttp://camel.apache.org/languages.html


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DSL in 3 programming languages

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from(A) filter(isWidget) --> B

/quote/product = widget

XMLJava

Scala



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Type Converters

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INFO DefaultTypeConverter

- Loaded 148 type converters



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Custom Type Converters

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# META-INF/services/org/apache/camel/TypeConverter

com.acme.convertersMETA-INF file in the JAR

@Converter

public class MyTypeConverter {

@Converter

public String toString(MyOrder order) {StringBuilder sb = new StringBuilder();

...

return sb.toString();

}

}


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Bean as Message Translator

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Bean as Message Translator

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public class Foo {

public String someMethod(String name) {

return Hello + name;}

}

from("activemq:Incoming).

beanRef("myBeanName, someMethod").

to("activemq:Outgoing");



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Bean Parameter Binding with XPath

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public class Foo {

public String processOrder(

String orderAsXml,

@XPath(/order/@id") String oid,@Header("JMSCorrelationID") String cid) {

...

}

}



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Sending message

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public class Foo {

@Produce(uri = "activemq:foo.bar")

ProducerTemplate producer;

public void doSomething() {

if (whatEver) {

producer.sendBody("Hello World");

}

}

}



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Receiving message

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public class Foo {

@Consume(uri = "activemq:cheese")

public void onCheese(String name) {

...

}

}



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Test Kit

camel-test.jar

JUnit based (3.x and 4.x)

Supports Spring

Easy to test

Quick prototyping

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Test Kit from IDE

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Right Click ->

Run

Debug

extend CamelTestSupport

Inline RouteBuilder



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Managed

JMX API

REST API

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Web console

REST API

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FuseSource Rider

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Summary

50+ EIP patterns

70+ Connectivity components

15+ Data formats

10+ Languages

DSL in multiple flavors (Java, XML, Scala, Groovy) Automatic type conversion

Strong bean support

Test Kit

Management (JMX, REST)

Web console

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Agenda


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A little example


Running Camel

Another Example

The Camel Community

Q and A

Running Camel


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Riding the Camel

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Running Camel


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Camel is not a server

Camel is lightweight and embeddable

Known Deployment Options

Standalone Java Application

Web Application

J2EE Application

JBI

OSGi

Google App Engine

Java Web Start Spring Application

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Known Containers

Apache ServiceMix

Apache ActiveMQ

Apache Tomcat

Jetty

JBoss

IBM WebSphere

BEA WebLogic

Oracle OC4j

GAE... others

Running Camel


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Java Application

Spring Application

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CamelContext context = new DefaultCamelContext();

context.addRoutes(new MyRouteBuilder());

context.start();

com.acme.quotes

Agenda


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A little example


Running Camel

Another Example

The Camel Community

Q and A

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Another Example


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Rider Auto Parts Example by Jonathan Anstey

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http://architects.dzone.com/articles/apache-camel-integration

Another Example
http://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integration


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Rider Auto Parts Example - 3 Routes

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1

Another Example


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1

Another Example


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Another Example


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Rider Auto Parts Example - 1st Route

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from

to

1

public class Route1 extends RouteBuilder {


from("ftp:[email protected]?password=secret")

.to("activemq:queue:incoming");

}

}

Another Example
mailto:[email protected]:[email protected]


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Rider Auto Parts Example - 2nd Route

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tofrom

public class Route2 extends RouteBuilder {


from("jetty:http://localhost:8080/orders")

.inOnly("activemq:queue:incoming")

.transform().constant("OK");

}

}

2

Another Example


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Rider Auto Parts Example - 3rd Route

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from to

choice

3

route on next slide


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Agenda


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A little example


Running Camel

Another Example

The Camel Community

Q and A

The Camel Community


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2010 Progress Software Corporation

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Camel website

52% increase (2010 over 2009)

Average 2200 visits per weekday (2000 - 2500)

High activity on mailing list

The Camel Community


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2010 Progress Software Corporation

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20 committers

High commit activity

http://markmail.org/
http://markmail.org/http://markmail.org/


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The Camel Community


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A lot in each new release

Release Date Tickets

Camel 2.0 Aug 2009 760

Camel 2.1 Dec 2009 303

Camel 2.2 Feb 2010 180

Camel 2.3 May 2010 278

Camel 2.4 July 2010 182

Camel 2.5 Sep 2010 170+

The Camel Community


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3rd party integrating Camel

Apache ServiceMix

Apache ActiveMQ

Apache James

OpenESB

Progress Actional Diagnostics FuseHQ

Open eHealth Integration Platform

Grails Camel Plugin

Play Framework

Akka

Scalate

JBoss Drools

JBoss ESB

In Progress

Smooks

Doozer

Agenda


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A little example


Running Camel

Another Example

The Camel Community

Q and A

Q and A


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Where do I get more information?

Camel website: http://camel.apache.orgCamel article: http://architects.dzone.com/articles/apache-camel-integration

FuseSource website: http://fusesource.com

Camel in Action book: http://manning.com/ibsen

Q and A
http://camel.apache.org/http://architects.dzone.com/articles/apache-camel-integrationhttp://fusesource.com/http://manning.com/ibsenhttp://manning.com/ibsenhttp://fusesource.com/http://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://architects.dzone.com/articles/apache-camel-integrationhttp://camel.apache.org/


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