Spring Integration

www.opencredo.com

Spring Integration 1.0.X and whats coming in 2.0

Jonas Partner OpenCredo Principle Consultant

Spring Integration Committer

Tuesday, 20 October 2009

© 2009 Open Credo Ltd www.opencredo.com

Agenda

• Enterprise Integration Patterns• Why Spring Integration• What Spring Integration provides• Whats new in SI 2.0• Questions



Enterprise Integration Patterns

• Book by Gregor Hohpe and Bobby Wolf• Documents

– Styles of Integration database, file, messages and channels

– Patterns• Splitter• Router• Transformer



Messages

Generic package for data (the Message payload) that can be transported via channels

Headers provide information to other components that consume from channelsSequence Number

Sequence Size

...

Headers

Payload



Channels

Channels deliver messages from producers to consumers

Producer Channel Consumer



Why use messaging 1/2

• Louse coupling– Localise impact of changes– Improve separation of concerns

• Easy Interception– Mediation– Filtering– Reroute



Why use messaging 2/2

• Performance– Less blocking since async– Efficient use of resources

• Threads• DB Connections

– More effective use of multi core processors



Agenda

• Enterprise Integration Patterns• Why Spring Integration• What Spring Integration provides• Whats new in SI 2.0• Questions



Why Spring Integration

• Spring goodness in the integration space– Light weight, not a server– Non invasive POJO programming model– Builds on strong foundation, Spring

• Reusable Enterprise Integration Pattern implementations

• Message and Channel approach useful for non integration applications



Light Weight

• Spring Integration != Spring ESB• Simply components in applications context

– Wiring together through dependency injection– Channels beans, adapters beans ...– Follows application context lifecycle

• Simple adoption



Agenda

• Why Spring Integration• Enterprise Integration Patterns• Spring Integration provides

– Enterprise Integration Patterns implementation

– Message and Channel framework– Adapters

• Whats new



Transformer

@Transformer public Document convert(Document doc){ return convertToNewFormat(doc); }



Splitter

@Splitter public List<Document> orderItems(Document doc){

return splitOrder(doc); }



Router

@Router public String resolveDrinkChannel(Drink drink) {

return (drink.isIced()) ? "coldDrinks" : "hotDrinks"; }



Chain

<chain input-channel="input" output-channel="output"> <filter ref="someSelector" throw-exception-on-rejection="true"/> <header-enricher error-channel="customErrorChannel"> <header name="foo" value="bar"/> </header-enricher> <service-activator ref="someService" method="someMethod"/> </chain>



Agenda




• Whats new



Adapter



Current Adapters

• JMS• RMI• Http Invoker• HTTP• File• Spring Web Services• Mail Spring Application Events



Agenda




• Whats new in 2.0



Spring Integration 2.0 1/2

• Due late this year– JDBC– Twitter??– Suggestions/requests/contributions

• Improved testing framework• Spring 3.0 expression language



Spring Integration 2.0 2/2

• XQuery• JMS Backed channel (not an adapter)• Other patterns

– Claim Check– Scatter Gather– Process Manager....



Also Spring Extensions

• Home to FTP adapters and other contributions – http://www.springsource.org/extensions/

se-sia• Spring Integration .Net

– http://www.springsource.org/extensions/se-springintegration-net

– Nearly a port of java.util.concurrent http://www.springsource.org/extensions/se-threading-net


http://www.springsource.org/extensions/se-sia




http://www.springsource.org/extensions/se-springintegration-net





Questions and the usual book plug


Technology

Spring Integration