Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies Building a Service Oriented Architecture with the Apache ServiceMix ESB Bruce Snyder IONA Technologies
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 1 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
How is SOA Like Cycling Up a Mountain?
- Break down large tasks into smaller ones! -- Bite size pieces are more realistic -- Many small goals instead of one big one
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 2 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Build on Many Small Successes to Reach Your Goal!
- Build on many small successes to reach your goal
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 3 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Breaking Down the Problem is Half the Battle...
- SOA is: -- An architectural paradigm - SOA is not: -- A product -- One size fits all
- Smaller, more distinct, distributed and reusable units of logic called services - Composite services - aggregate of - Designed to better withstand unpredictable change
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 4 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Service compositions are about a coordinated aggregate of services
- Loose coupling - Service contracts - Autonomy - Abstraction - Reusability - Composability - Statelessness - Discoverability
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 5 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Services Form Composite Applications
- SOA is all about composite applications -- Many reusable services aggregated into a service composition
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 6 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
A Service Oriented Analogy
- Gated community in a home owners assoc. -- Provides services (grounds maintenance, cable TV, security, clubhouse w/ pool, etc.) -- Used by many people (consumers) -- HOA community is comprised of many owners -- Adherence to basic conventions --- HOA requirements --- Address on house --- Mailbox at end of driveway --- Pay dues!
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 7 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
A story about skydiving...
- Michael Holmes - Top ten skydiver in the world - Member of the British skydiving team - Reigning New Zealand champion - 7,000+ jumps to his name - Aware of the risks of his career - Knows that panic-induced human error is to blame for almost all accidents
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 8 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
“I didn’t have time to think about anything... really I was just angry that I’d done everything exactly as I should and it hadn’t worked.”
- Michael plummeted 12,000 ft. to a failed parachute
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 9 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
There’s no substitute for experience and knowledge of human organizational behavior in terms of SOA
- People use their experience even if it doesn't apply to the current situation -- See Harwells Laws -- http://www.makingitclear.com/pages/harwellslaws.html
- Industry full of hope that is pinned on cookbook SOA methodologies -- There is no one-size-fits-all SOA recipe! --- Follow this recipe and you’ll be safe --- Go through the following 10 steps and your SOA will be a success. - You might end up being, “angry that you’d done everything exactly as you should and it still didn’t work!”
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 10 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Java Business Integration
- Standards based architecture for pluggable components in a reliable manner - Elimination of vendor lock-in - Provides a base for a service oriented architecture - JBI allows two types of plug-ins: -- Service Engines --- Provides functionality local to the NMR -- Binding Components --- Provides transports and protocols to communicate with services remote to the NMR --- Normalizes payload
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 11 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
JBI Packaging
- Packaging for configurations of components -- Service Unit (SU) --- META-INF/jbi.xml -- Service Assembly (SA) --- META-INF/jbi.xml --Similar to WARs and EARs with Java EE - Each SU is like a little Spring application -- Including dependencies - Each SA is an outer package -- SUs listed as dependencies
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 12 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Apache ServiceMix
-- Apache License 2.0 -- Combines SOA and Event Driven Architecture --- http://enterpriseintegrationpatterns.com/docs/EDA.pdf -- Built on Apache ActiveMQ -- Implements JBI and so much more! -- Connectivity centric -- Smart Routing capabilities -- It’s very flexible!
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 13 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Apache ServiceMix Architecture
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 14 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Configuration
. (conf/servicemix.xml)
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 15 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Developing Integrations With ServiceMix Demo
Development demo using ServiceMix
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 16 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
Visualization
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 17 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies So What’s Coming in ServiceMix 4.0? Framework: OSGi (Apache Felix) SOAP Support: Apache CXF Message Broker: Apache ActiveMQ Routing Engine: Apache Camel
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 18 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
What is Apache Camel?
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 19 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
What is EIP?
- The bible of integration patterns
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 20 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies Example Pattern: Content Based Router
RouteBuilder builder = new RouteBuilder() { public void configure() { from("seda:a").choice().when(header ("foo").isEqualTo("bar")).to("seda:b") .when(header("foo").isEqualTo ("cheese")).to("seda:c").otherwise().to ("seda:d"); } };
- The Java version of the Camel CBR
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 21 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies Example Pattern: Content Based Router
- The XML version of the CBR
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 22 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies Camel Makes Routing Much Easier!
from(“http://localhost:8080/requests/”). tryBlock(). to(“activemq:queue:requests”). setOutBody(constant(“
from((“activemq:queue:requests?transacted=true”). process(requestTransformer). to(“http://host:8080/Request”). filter(xpath(“//nack”)). process(nackTransformer). to(“jdbc:store”);
from(“http://localhost:8080/responses/”). tryBlock(). to(“activemq:queue:responses”). setOutBody(constant(“
from(“activemq:queue:responses?transacted=true”). process(responseTransformer). to(“jdbc:store”);
from(“http://localhost:8080/pull/”). to(“jdbc:load”);
- Message routing is much easier with Camel!
Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 23 Colorado Software Summit: October 21 – 26, 2007 © Copyright 2007, IONA Technologies
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Bruce Snyder — Building a Service Oriented Architecture with the Apache ServiceMix ESB Slide 24