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Enterprise Integration with Spring Integration
Agim EmruliSpringSource8100
2
Presentation Goal
Learn how Spring Integration helps to solve common Enterprise Integration challenges
3
IntegrationChallenges
4System Failures
5
IntolerantSystems
Enterprise Integration Patterns
6
Pattern Catalog Overview 7
Message Transformation
Content FIlter
Content
Enricher
Envelope
WrapperMessage
Translator
Normalizer
Claim Check
Message Construction
C
Command
Message
A B
Correlation ID
D
Document
Message
E
Event
Message
Message
Message
Sequence
Request
Reply
Return
Address
Message Routing
Aggregator
Content Based
Router
Composed
Message
Message
FIlter
Message
Router
Recipient List
Process
Manager
Splitter
8
How does Spring help ?
9
Spring Big Picture
Inversion of Control
Dependency Injection
Aspect oriented
Programming
Enterprise Service
Abstraction
10
Focus on Business domain
Spring Powered Applications11
Application
Maintain-able Flexible
RobustTestable
Layered Architecture 12
Layered Architecture 12
Domain Objects
Layered Architecture 12
Database Email Messaging
Domain Objects
Layered Architecture 12
Database Email Messaging
Infrastructure
Domain Objects
Layered Architecture 12
Database Email Messaging
Infrastructure
Domain ObjectsData Access
Layered Architecture 12
Database Email Messaging
Infrastructure
Domain Objects
Services
Data Access
AOP
Layered Architecture 12
Database Email Messaging
Infrastructure
Domain Objects
Services
Data Access
Layered Architecture13
Spring Application
Layered Architecture13
Spring Application
MVC
Layered Architecture13
Spring Application
RMIMVC
Layered Architecture13
Spring Application
Webservice RMIMVC
Layered Architecture13
Spring Application
Webservice RMIMVC
Batch
Layered Architecture13
Spring Application
Webservice RMIMVC
Batch JMS
Event Driven Architecture14
Event
Framework
Application
Spring JMS Support15
<jms:listener-container transaction-manager="txManager"> <jms:listener ref="orderService" method="order" destination="queue.orders" response-destination="queue.confirmation"/></jms:listener-container>
Spring JMS Support15
<jms:listener-container transaction-manager="txManager"> <jms:listener ref="orderService" method="order" destination="queue.orders" response-destination="queue.confirmation"/></jms:listener-container>
public class OrderService { public OrderConfirmation order(Order o) {..}
}
16
Introducing Spring Integration
17
Goals
18
Reuse ServiceLayer
19
Incremental Extension
Spring Integration Architecture20
Spring Integration Architecture20
Services
Spring Integration Architecture20
Services
Webservice
Spring Integration Architecture20
Services
Webservice File
Spring Integration Architecture20
Services
Webservice File
Spring Integration Architecture20
Services
Webservice File
Transformer
Spring Integration Architecture20
Services
Webservice
Router
File
Transformer
21
MessageConstruction
Message Structure22
Message HeaderSequence Number
Sequence SizeExpiration Date
Correlation Identifier
Message Body
C
Command
Message
D
Document
Message
E
Event
Message
Message Interface23
public interface Message<T> {
MessageHeaders getHeaders();
T getPayload();}
24Message Headers
24
MessageHeaders headers = message.getHeaders();
String value = headers.get("key", String.class);
Object id = headers.getId();
Long timestamp = headers.getTimestamp();
MessagePriority priority = headers.getPriority();
Message Headers
25Message Builder
25
Message<String> message = MessageBuilder.withPayload("test") .setHeader("foo", 123) .setPriority(MessagePriority.HIGHEST) .build();
Message<String> copy = MessageBuilder.fromMessage(message) .setHeader("foo", 456) .setHeaderIfAbsent("bar", 789) .build();
Message Builder
26Channels And Endpoints
Message Channel27
Message Endpoint
Message Message
ChannelMessage Endpoint
Direct Channels28
Event-Driven
ConsumerMessage Endpoint Channel
Direct Channels28
Event-Driven
ConsumerMessage Endpoint Channel
<channel id="sync-p2p" />
Queue Channel29
Message Endpoint ChannelPolling
Consumer
Queue Channel29
Message Endpoint ChannelPolling
Consumer
<channel id="async-p2p"> <queue capacity="50" /></channel>
Publish-Subscribe Channel30
Message EndpointPublish Subscribe
Channel
Event-Driven
Consumer
Event-Driven
Consumer
Publish-Subscribe Channel30
Message EndpointPublish Subscribe
Channel
Event-Driven
Consumer
Event-Driven
Consumer
<publish-subscribe-channel id="pubsub" />
Priority Channel31
Message Endpoint ChannelPolling
Consumer
Resequencer
Priority Channel31
Message Endpoint ChannelPolling
Consumer
Resequencer
<channel id="priorityChannel"> <priority-queue comparator="someComp" /></channel>
32Message Transformation
Message Translator33
Channel ChannelMessage Translator
Message Translator33
<transformer input-channel="input" output-channel="output" ref="transformer" method="transform"/>
Channel ChannelMessage Translator
Annotation Based Message Translator34
@MessageEndpointpublic class MessageTransformer{ @Transformer(inputChannel="in",
outputChannel="out") public LoanRequest transform(Loan loan){ return ...; }}
35Service Activator
36
Service Activator
Channel
ChannelMessage Endpoint
Service Activator
Message Endpoint
Service Activator37
<channel id="requests"/><channel id="quotes"/>
<service-activator input-channel="requests" ref="loanBroker" method="processRequest" output-channel="quotes"/>
<beans:bean id="loanBroker" class="example.LoanBroker"/>
Annotation Based Service Activator38
@MessageEndpointpublic class LoanBroker {
@ServiceActivator(inputChannel="x", outputChannel="y") public LoanQuote processRequest(
LoanRequest request) { LoanQuote quote ...; return quote; }}
Polling and Transactions39
<service-activator ref="loanBroker" method="processRequest" input-channel="requests" output-channel="quotes"> <poller task-executor="pool1"> <interval-trigger interval="5000"/> <transactional propagation="REQUIRES_NEW"/> </poller></service-activator><pool-executor id="pool1" max-size="25"/><beans:bean id="transactionManager" ... />
40Message Routing
Content Based Router41
Standard Service
Channel
VIP Service Channel
Channel Content Based Router
MethodInvokingRouter42
<channel id="even"/>
<channel id="odd"/>
<router ref="parityResolver" input-channel="numbers"/>
MethodInvokingRouter42
<channel id="even"/>
<channel id="odd"/>
<router ref="parityResolver" input-channel="numbers"/>
@Routerpublic String getParity(int i) { return (i % 2 == 0) ? "even" : "odd";}
PayloadtypeRouter43
Channel
String Channel
Integer Channel
Content Based Router
PayloadtypeRouter43
typeMap .put(String.class, stringChannel);typeMap.put(Integer.class, integerChannel);
PayloadTypeRouter router = new PayloadTypeRouter();router.setPayloadTypeChannelMap(typeMap);
router.handleMessage(new StringMessage("test")); router.handleMessage(new GenericMessage(123));
Channel
String Channel
Integer Channel
Content Based Router
ReceipientListRouter44
Channel
Channel
Recipient ListChannel
ReceipientListRouter44
channels.add(channel1);channels.add(channel2);
RecipientListRouter router = new RecipientListRouter();router.setChannels(channels);Message<String> message = new StringMessage("test");
router.handleMessage(message);
Channel
Channel
Recipient ListChannel
Splitter And Aggregator45
Channel
ChannelAggregator
Splitter
Splitter And Aggregator46
@Splitterpublic List<OrderItem> splitOrder(PurchaseOrder order, @Header("customerId") String customerId) { // split the purchase order into order items…}
Splitter And Aggregator46
@Splitterpublic List<OrderItem> splitOrder(PurchaseOrder order, @Header("customerId") String customerId) { // split the purchase order into order items…}
@Aggregatorpublic PurchaseOrder aggregateOrder(List<OrderItem> items) { // aggregate the items into a single order object...}
47
ChannelAdapter
Channel Adapters48
External System ChannelChannel Adapter
Message
Inbound
Channel Adapters48
External System ChannelChannel Adapter
Message
Inbound
External SystemChannel Channel Adapter
Message
Outbound
File Adapter49
<file:inbound-channel-adapter channel="filesIn" directory="${java.io.tmpdir}/test-input"> <poller max-messages-per-poll="5"> <cron-trigger expression="*/10 * * * * MON-FRI"/> </poller></file:inbound-channel-adapter>
<file:outbound-channel-adapter channel="filesOut" directory="${java.io.tmpdir}/test-output"/>
JMS Adapter50
<jms:inbound-channel-adapter channel="input" connection-factory="connectionFactory" destination-name="sourceQueueName"/>
<jms:outbound-channel-adapter channel="output" destination="targetQueue"/>
<jms:inbound-gateway request-channel="inRequests" destination="inboundRequestQueue"/>
<jms:outbound-gateway request-channel="outRequests" reply-channel="replies" jms-queue="outQueue"/>
Method Invoking Adapter51
<channel id="channel"/>
<inbound-channel-adapter channel="channel" ref="reader" method="read"> <poller max-messages-per-poll="1"> <interval-trigger interval="1000"/> </poller></inbound-channel-adapter>
<outbound-channel-adapter channel="channel" ref="writer" method="write"/>
Webservice Adapter52
<ws:outbound-gateway uri="http://..." marshaller="someMarshaller" unmarshaller="someMarshaller" request-channel="req" reply-channel="rep"/>
<ws:inbound-gateway request-channel="req" reply-channel="rep" marshaller="someMarshaller" unmarshaller="someMarshaller" />
Other Adapters53
> HTTP> Mail> RMI > springsource.org/extensions
54
Q & AAgim Emruliagim.emruli@springsource.com
55
THANK YOU!
Picture Credits56
http://www.flickr.com/photos/scraplab/2612334635/
http://www.flickr.com/photos/mylifestory/527847004/
http://www.flickr.com/photos/alex-s/116511016/
http://www.flickr.com/photos/jdan/2324469981/
Picture Credits57
http://www.flickr.com/photos/global-jet/2125557004/
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