Styles of Applicaton Integration Using Spring

Styles of Application Integration Using Spring

Bruce Snyder, Senior Software Engineer, SpringSource/VMware

Friday, July 15, 2011

Integrations Are About Coupling

Where Coupling Exists, Concerns Arise

• Tight coupling is easy • Loose coupling can be difficult

• Tight coupling causes issues in the long run • Loose coupling pays off in the long run

• Integrations are usually tightly coupled • Integrations should be loosely coupled

• Integrations are commonly addressed using commands • Integrations should be addressed using events

What is Coupling?

• Given two lines of code, A and B, they are coupled when B must change behavior only because A changed

“... the degree to which each program module relies on each one of the other modules” (Wikipedia.com)

Characteristics Tight Coupling

• Components are highly dependent upon one another• Components are directly linked • Changes in one component cause a ripple effect • Less reusability • More difficult to maintain • Does not handle unforeseen change well

• Examples– Clients designed to interact only with specific systems – Use of proprietary APIs or commands for interaction – Components designed to work specifically with other

components

Characteristics of Loose Coupling

• Components have little or no knowledge of one another • Components are not directly linked to one another • Changes in one component do not affect other components • Increased reusability • Easier to maintain • More easily handles unforeseen changes

• Examples– Dependence upon interfaces instead of concrete classes – Use of DI encourages looser coupling – A design using a level of indirection

Tight Coupling is Easy

• App design with tight coupling is more widely understood• App development with tight coupling requires less time • Debugging a tightly coupled app is easier • Benefits of tight coupling are seen immediately • Tightly coupled prototypes commonly live on

Loose Coupling is Difficult

• App design with loose coupling is not widely understood• App development with loosely coupling requires more

thought and more time• Debugging loosely coupled apps is different • Benefits of loose coupling are only seen over time

Integrations and Coupling

• But it’s easy to write a point-to-point, one-off piece of code for integration!

• Too many disadvantages – Difficult to maintain – No reusability – Every integration is unique – Bites you over time

Integrations and Coupling

• But designing integrations to be loosely coupled requires too much work!

• With the right knowledge and preparation, it doesn’t need to be this way

Commands vs. Events

• Commands are not natural – Verify credit card

• Commands are too specific

• Events are natural – Order received

• Events are more broad • Events are what happen in the real world

Enterprise Integration Patterns (EIP)

http://enterpriseintegrationpatterns.com/

Spring Integration

• Provides both concurrency and messaging– Message Endpoints

• Connections between services – Channel Adapters

• Adapter between application and message broker – Messaging Gateways

• Provides uni-directional or bi-directional messaging – Service Activators

• Invokes a services based on an incoming message – Routers

• Determines where to dispatch a message – Splitters and Aggregators

• Breaks up a message and reassembles it after processing

Spring Integration

• Supports – AMQP– Email– File system – Gemfire– JMS– JMX– MongoDB– Redis– Spring Batch – Testing – Web Services

Spring Integration

Types of Integration

• Intra-application integration • Inter-application integration • External system integration

Typical Application Layers

Intra-Application Integration

Spring Integration Config

<int:gateway id="sender" service-interface="org.bsnyder.spring.integration.simple.Sender"/>

<int:channel id="orderReceived"/>

<int:service-activator input-channel="orderReceived" ref="receiver" method="receive" />

Intra-Application Integration

<int:gateway id="sender" service-interface="org.bsnyder.spring.integration.appa.Sender"/>

<amqp:outbound-channel-adapter channel="orderReceived" exchange-name="order.received.exchange" routing-key="order.received.binding" amqp-template="amqpTemplate" />

<rabbit:connection-factory id="connectionFactory" /><rabbit:template id="amqpTemplate" connection-factory="connectionFactory" /><rabbit:admin connection-factory="connectionFactory" /><rabbit:queue name="order.received.queue" /><rabbit:direct-exchange name="order.received.exchange"> <rabbit:bindings> <rabbit:binding queue="order.received.queue" key="order.received.binding" /> </rabbit:bindings></rabbit:direct-exchange>

<amqp:inbound-channel-adapter channel="orderReceived" queue-names="order.received.queue" connection-factory="connectionFactory" />

<int:service-activator input-channel="orderReceived" ref="receiver" method="receive" /> <bean id="receiver" class="org.bsnyder.spring.integration.appa.Receiver"/>

Inter-Application Integration

<amqp:outbound-channel-adapter channel="orderReceived" exchange-name="order.received.exchange" routing-key="order.received.binding" amqp-template="amqpTemplate" />

<amqp:inbound-channel-adapter channel="orderReceived" queue-names="order.received.queue" connection-factory="connectionFactory" />

<int:service-activator input-channel="orderReceived" ref="receiver" method="receive" /> <bean id="receiver" class="org.bsnyder.spring.integration.appb.Receiver"/>

External System Integration

<int-ftp:outbound-channel-adapter id="ftpOutbound" channel="ftpChannel" remote-directory="/foo/bar/baz/" client-factory="ftpClientFactory"/>

<int:channel id="ftpChannel"> <int:queue/></int:channel>

<int:service-activator input-channel="ftpChannel" ref="receiver" method="receive" /> <bean id="receiver" class="org.bsnyder.spring.integration.appb.Receiver"/>

Combined Integration

Thank You!

Styles of Applicaton Integration Using Spring

Technology

Transcript of Styles of Applicaton Integration Using Spring

Applicaton Delivery Challan CARD NET... · 2018. 11. 26. · Title: Applicaton Delivery Challan.cdr Author: User Created Date: 11/16/2018 12:54:45 PM

DIFFERENTIATED LEARNING STYLES / TEACHING STYLES TEST

Ph_D_ Ordinance & Applicaton Form for Nov 2011 Admission

GLOBAL AMANI%PARTNERSHIP GENERAL’PROJECT’INFORMATIONamanitrust.homestead.com/Global_20Partnership_20Applic... · 2012. 8. 8. · GLOBAL!!AMANI%PARTNERSHIP" APPLICATON!TO!EXTEND!&!!THREEYEAR!DEVELOPMENT!PLAN!201372015!

MTAT.03.229 Enterprise System Integration · 2013-09-09 · Integration Styles (classified by topology) Point-to-point integration DB synchronization File transfer RPC / RMI (without

Applicaton of Calix

Oracle Fusion Middleware Application Adapters …...Oracle Data Integrator (ODI) features an active integration platform that includes all styles of data integration: data-based, event-based

Applicaton Development using RESTful APIs

Demo EndNote Web€¦ · 3311 EndNote Web bibliographic styles 23 Custom bibliographic styles Integration with MS Word Cite While You Write Plug-In Formatting paper Export of references

ICON UK 2016: Modernizing an IBM Notes applicaton using with AngularJS

2 Graphene Supply Applicaton and Commercialisation Uk 2014

Locking feet... Sitting Styles Walking Styles.

Analysis of McCarthy Learning Styles and Integration of ...

Build and deploy an ASP.NET applicaton

REGENERATION PROGRAM ADMISSION APPLICATON · REGENERATION PROGRAM ADMISSION APPLICATON. Page 2 of 37. Page 3 of 37 ... I realize that no one other than myself is aware of what possessions

LOUISIANA - Grambling State University€¦ · learning styles. II.5 Apply curriculum concepts (scope, sequence, balance, integration) in curriculum development and instructional

Self Serve Census Data for Neighborhoods and other Custom Aggregations A SAS/IntrNet Applicaton

Applicaton Note - · PDF fileUMTS P-CPICH Demodulation option,

Möbius Partners : info@mobiuspartners.com : 5444 ... · 12/11/2017 · Integration is dead! Long live integration New styles of integration are the hallmark of Digital Transformation

APPLICATON OF ASSISTIVE DEVICES IN EDUCATION OF CWSN · on the topic “APPLICATON OF ASSISTIVE DEVICES IN EDUCATION OF CWSN” at Tecnia Auditorium. The main goal of this one day