Micro Service Architecture with Spring Boot and Groovy

Micro ServiceMicro Service

ArchitectureArchitecturewith Spring Boot, Groovy and Friendswith Spring Boot, Groovy and Friends

Spring Boot with Groovy and Friends http://localhost/spring-boot/#/

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About MeAbout Me

Marco VermeulenMarco Vermeulen

Love Coding!Worked for Shazam, Associated Newspapers, Burberry, VisaCurrent: Equal Experts at HMRCCreator of GVM (Groovy enVironment Manager)Blog: Twitter:

Wired for Code@marcoVermeulen

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The TalkThe Talk

ConceptsMicro Service ArchitectureSpring & Spring BootSpring Boot Components

DemoGradleCucumber, SpockSpring Boot & GroovySpring Data & MongoDB

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About the DemoAbout the Demo

Invader ZimInvader Zim

American CartoonCreated by Jhonen VasquezOn Nickelodeon from March, 2001Discontinued, with Cult following!Theme of IMPENDING DOOM!Characters: Zim and GIR

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About the DemoAbout the Demo

Invader ZimInvader Zim

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Zim and GIRZim and GIR

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Micro Service ArchitectureMicro Service Architecture

-- James Lewis :

..how we designed and built a Resource Oriented, Event DrivenSystem out of applications about 1000 lines long...

Java, the Unix Way

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Micro Service ArchitectureMicro Service Architecture

Small with Single ResponsibilitySmall with Single Responsibility

Many small apps, not monolithicSingle functionFew hundred lines of codeEasy to bin and rewrite!

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Micro Service ArchitectureMicro Service Architecture

Containerless Unix ProcessContainerless Unix Process

Embedded ContainerExecutable FatJarInstall with Package Manager (RPM/DEB)Use unix service scripts

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Micro Service ArchitectureMicro Service Architecture

Dedicated VCS rootsDedicated VCS roots

Separate Repo per appOkay to duplicate domains!Common modules can be extracted

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Micro Service ArchitectureMicro Service Architecture

Status Aware and Auto-ScalingStatus Aware and Auto-Scaling

In-app MetricsPing and Health ChecksExternal watchdog processScale on demand

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FrameworksFrameworks

Lots of choices!Lots of choices!

SinatraPlayDjangoDrop WizardVertxGrailsRatpackSpring Boot

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Spring EcosystemSpring Ecosystem

In the beginning...In the beginning...

J2EE Development without EJB

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Spring DataSpring Data

DefinedDefined

the umbrella project which aims to provide a familiar andconsistent Spring-based programming model for new datastoreswhile retaining store-specific features and capabilities.

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Spring DataSpring Data

Command PatternCommand Pattern

NoSQL datastores (Mongo, Redis, Neo4J, Hadoop)Relational stores (JPA & JDBC)Umbrella Project has Sub-projects (Official & Community)Unified Interface

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Spring DataSpring Data

Spring Data for MongoDBSpring Data for MongoDB

Java Config with AbstractMongoConfigurationMongoRepository interfaceExceptions translate to DataAccessExceptionObject MappingMuch more...

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Spring BootSpring Boot

over Springover Spring

OpinionatedAutomatic configStandalone appsEmbedded containerStarter + Example buildsMetricsNo XML!Groovy!

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Spring BootSpring Boot

Configuration ComponentsConfiguration Components

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Spring BootSpring Boot

ComponentsComponents

ApplicationApplication

@EnableAutoConfiguration @ComponentScan("zim") class Application { static void main(String[] args){ new SpringApplication(Application).run(args) } }

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Spring BootSpring Boot

ComponentsComponents

ConfigurationConfiguration

@Configuration class MongoConfiguration extends AbstractMongoConfiguration {

String getDatabaseName() { "invasion" }

Mongo mongo() throws Exception { new MongoClient() } }

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Spring BootSpring Boot

Component Stereotypes and DomainComponent Stereotypes and Domain

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Spring BootSpring Boot

StereotypesStereotypes

ControllerController

context: /invader/zim

@Controller class InvasionController {

@Autowired QuoteRepository repository

@RequestMapping("/invader/{name}") @ResponseBody ResponseEntity quote(@PathVariable String name){ def quotes = repository.findByName(name) if(!quotes) throw new InvaderNotFoundException(name)

def quote = quotes[(int)(Math.random() * quotes.size())] new ResponseEntity(quote, OK) } }

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Spring BootSpring Boot

StereotypesStereotypes

ServiceService

@Service class SomeService {

Stuff prepare(String stuffing){ //do stuff stuff } }

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Spring BootSpring Boot

StereotypesStereotypes

RepositoryRepository

@Repository interface QuoteRepository extends MongoRepository<Quote, BigInteger> { List<Quote> findByName(String name) }

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Spring BootSpring Boot

DomainDomain

ModelModel

@Document class Stuffing { @Id BigInteger id @Field String name @Field String description }

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Spring BootSpring Boot

BuildBuild

build.gradle

buildscript { repositories { url "http://repo.spring.io/libs-release" } dependencies { classpath "org.springframework.boot:spring-boot-gradle-plugin:1.1.5.RELEASE" }}apply plugin: 'spring-boot'apply plugin: 'groovy'repositories { url 'http://repo.spring.io/release'}dependencies { compile "org.codehaus.groovy:groovy:2.3.7" compile "org.springframework.boot:spring-boot-starter-web" compile "org.springframework.boot:spring-boot-starter-actuator" compile "org.springframework.boot:spring-boot-starter-remote-shell" compile "org.springframework.boot:spring-boot-starter-data-mongodb"}

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Invader Zim and GIRInvader Zim and GIR

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Quote ServiceQuote Service

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DemoDemo

Invader Zim (and GIR)Invader Zim (and GIR)

Quote ServiceQuote Service

curl -s http://localhost:8080/invader/GIR

HTTP/1.1 200 OKServer: Apache-Coyote/1.1Content-Type: application/json;charset=UTF-8Transfer-Encoding: chunkedDate: Sun, 23 Mar 2014 14:17:44 GMT

{ "id":25723559900237556407223458322, "name":"GIR", "message":"Can I be a mongoose dog?"}

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ConclusionConclusionMicro Services:Micro Services:

evolved from Monolithsare smallhave single responsibilityare dispensibleare self containedhave embedded containersare self awareMUST LOOK UP INVADER ZIM!

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Thank You!!!Thank You!!!

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Q & AQ & A

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