The talk presented by James Strachan (Red Hat) on the 6th of March 2013 at the London JBoss USer Group event. Visit London JBUG on Meetup http://www.meetup.com/JBoss-User-Group/

1. Implemen(ng
Enterprise
Integra(on
Pa3erns
through
Apache
Camel
James
Strachan,
Red
Hat
1
Friday, February 8, 2013

2. Your
speaker
today
 James
Strachan
• jstrachan@redhat.com
• twi8er:
@jstrachan
• blog:
h8p://macstrac.blogspot.com/
 Senior
Consul(ng
SoFware
Engineer
at
Red
Hat
• leaders
in
open
source
middleware
&
integra?on
• we
provide
training,
consul?ng,
support,
distribu?ons
&
tools
for
open
source
integra?on
soCware
 Open
Source
hacker
• created
the
Groovy
programming
language
• created
Apache
Camel
• co-­‐founder
of
– Apache
Ac(veMQ,
ServiceMix,
Geronimo
– Scalate
• lets
not
men?on
Jelly
:)
2 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

3. What
are
Enterprise
Integra?on
Pa8erns?
3 Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

4. Book
by
Gregor
&
Bobby!
4 Copyright
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2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

5. A
selec?on
of
some
of
the
pa8erns...
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2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

6. What
is
Apache
Camel?
http://camel.apache.org/
6 Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

7. What
is
Apache
Camel?
Apache
Camel
is
a
Powerful
Open
Source
Integra(on
Framework
based
on
known
Enterprise
Integra(on
Pa3erns
h3p://camel.apache.org/enterprise-­‐integra(on-­‐pa3erns.html
7 Copyright
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

8. Lets
look
at
a
pa8ern!
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

9. Message
Filter
9 Copyright
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2013
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Hat,
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Friday, February 8, 2013

10. Message
Filter
:
XML
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="activemq:topic:Quotes"/>
<filter>
<xpath>/quote/product = ‘widget’</xpath>
<to uri="mqseries:WidgetQuotes"/>
</filter>
</route>
</camelContext>
10 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

11. Message
Filter
:
Spring
XML
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://camel.apache.org/schema/spring
http://camel.apache.org/schema/spring/camel-spring.xsd">
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="activemq:topic:Quotes"/>
<filter>
<xpath>/quote/product = ‘widget’</xpath>
<to uri="mqseries:WidgetQuotes"/>
</filter>
</route>
</camelContext>
</beans>
11 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

12. Message
Filter
:
XML
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="activemq:topic:Quotes"/>
<filter>
<xpath>/quote/product = ‘widget’</xpath>
<to uri="mqseries:WidgetQuotes"/>
</filter>
</route>
</camelContext>
12 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

13. Expressions
&
Predicates
15 Expression
Languages BeanShell Python
EL Ruby
Groovy Simple
JavaScript SpEL
JSR 223 SQL
OGNL XPath
MVEL XQuery
PHP
13 Copyright
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2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

14. URIs,
Endpoints
and
Components
(120+)
h8p://camel.apache.org/components.html
activemq cxf flatpack jasypt
activemq-journal cxfrs freemarker javaspace
amqp dataset ftp/ftps/sftp jbi
atom db4o gae jcr
bean direct hdfs jdbc
bean validation ejb hibernate jetty
browse esper hl7 jms
cache event http jmx
cometd exec ibatis jpa
crypto file irc jt/400
14 Copyright
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2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

15. 120+
components...
language properties seda stream
ldap quartz servlet string-template
mail/imap/pop3 quickfix sip test
mina ref smooks timer
mock restlet smpp validation
msv rmi snmp velocity
nagios rnc spring-integration vm
netty rng spring-security xmpp
nmr rss spring-ws xquery
printer scalate sql xslt
15 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

16. Message
Filter
:
XML
<camelContext xmlns="http://camel.apache.org/schema/spring">
<route>
<from uri="activemq:topic:Quotes"/>
<filter>
<xpath>/quote/product = ‘widget’</xpath>
<to uri="mqseries:WidgetQuotes"/>
</filter>
</route>
</camelContext>
16 Copyright
©
2013
Red
Hat,
Inc.
All
rights
reserved.
Friday, February 8, 2013

17. Message
Filter
:
Java
from("activemq:topic:Quotes”).
filter().xpath("/quote/product = ‘widget’").
to("mqseries:WidgetQuotes");
17 Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

18. Message
Filter
:
Java
Complete
package com.acme.quotes;
import org.apache.camel.builder.RouteBuilder;
public class MyRouteBuilder extends RouteBuilder {
public void configure() {
// forward widget quotes to MQSeries
from("activemq:topic:Quotes”).
filter().xpath("/quote/product = ‘widget’").
to("mqseries:WidgetQuotes");
}
}
18 Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

19. Message
Filter
:
Scala
"direct:a" when(_.in == "<hello/>") {
to("mock:a")
}
19 Copyright
©
2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

20. Create
CamelContext
in
Spring
<camelContext xmlns="http://camel.apache.org/schema/spring">
<package>com.acme.quotes</package>
</camelContext>
20 Copyright
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

21. Create
CamelContext
in
Java
CamelContext context = new DefaultCamelContext();
context.addRoutes(new MyRouteBuilder());
context.start();
21 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

22. IDE
support
Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

23. IDE
support
(XML)
23 Copyright
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2013
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Hat,
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Friday, February 8, 2013

24. Recap
-­‐
core
concepts
of
Camel
 Enterprise
Integra(on
Pa3erns
 Rou(ng
 Domain
Specific
Language
(DSL)
 Endpoints
&
URIs
 Predicates
&
Expressions
 Components
(lots
of
‘em!)
 Test
Kit

and
much
more
...
24 Copyright
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Hat,
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rights
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Friday, February 8, 2013

25. Beans
25 Copyright
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Hat,
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Friday, February 8, 2013

26. Bean
as
a
Message
Translator
from("activemq:Incoming”).
beanRef("myBeanName”, “someMethod").
to("activemq:Outgoing");
26 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

27. Bean
public class Foo {
public String someMethod(String name) {
return “Hello “ + name;
}
}
27 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

28. Binding
Beans
to
Camel
Endpoints
public class Foo {
@Consume(uri="activemq:cheese")
public Object onCheese(String name) {
...
}
}
28 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

29. Binding
Method
Arguments
public class Foo {
public Object onCheese(
@XPath("/foo/bar") String name,
@Header("JMSCorrelationID") String id) {
...
}
}
for
more
annota(ons
see
h3p://camel.apache.org/bean-­‐integra(on.html
29 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

30. Sending
messages
to
endpoints
public class Foo {
@Produce(uri="activemq:foo.bar")
ProducerTemplate producer;
public void doSomething() {
if (whatever) {
producer.sendBody("<hello>world!</hello>");
}
}
}
30 Copyright
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

31. Sending
messages
to
endpoints
public interface MyListener {
String sayHello(String name);
}
public class MyBean {
@Produce(uri = "activemq:foo")
protected MyListener producer;
public void doSomething() {
// lets send a message
String response = producer.sayHello("James");
}
}
31 Copyright
©
2013
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Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013

32. Fastest
way
to
learn....
 Manning
top-­‐15
year
to
date
(2010)
#10 #12
Copyright
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

33. Fuse
IDE:
the
fastest
way
to
get
riding!
 free
eclipse
based
tool
for
Apache
Camel
&
Ac(veMQ
etc
• create
projects,
edit
routes,
run
stuff,
visualise,
trace
&
diagnose
h3p://fusesource.com/
33 Copyright
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2013
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Hat,
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rights
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Friday, February 8, 2013

34. Summary:
Camel
rocks
 Ride
that
Camel
• h8p://camel.apache.org/
 Download
Fuse
IDE
• h8p://fusesource.com
 Buy
the
book!
 Don’t
get
the
hump!
34 Copyright
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2013
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Hat,
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rights
reserved.
Friday, February 8, 2013

35. Any
Ques(ons?
twi3er:
@jstrachan
#fusenews
h3p://fusesource.com
35 Copyright
©
2013
Red
Hat,
Inc.
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rights
reserved.
Friday, February 8, 2013