message driven microservices in the cloud

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SPRINGONE2GX WASHINGTON, DC

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Message-Driven Microservices (in the Cloud) Mark Fisher & Dave Syer @m_f_ @david_syer

Unless otherwise indicated, these slides are © 2013-2015 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/

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Contents

•  Background

•  Quick Code Tour

•  Channel Binders

•  Configuration Properties

•  Partitioning

•  Portability

•  Composition

•  Orchestration

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Background

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DIRT

CLOUD NATIVE XD-CONTAINER ZOOKEEPER

PLUGINS MICROSERVICES

STREAM TASK

LATTICE CLOUD FOUNDRY BOOT

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Container Container

Spring XD 1.x

Host

Spring Cloud Stream

•  Modules run inside containers •  Container is a Boot app •  Modules are ApplicationContexts

•  Modules are executable Boot apps •  Easier to use Spring Cloud features •  Easier to test, consistent dev experience •  Portable and “cloud-native”

M

Host

M

M M

M M M

M M

M

ZooKeeper Spring Cloud Data Flow (optional) SPI Implementation

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•  OOTB modules •  Executable Boot Apps

•  Boot for Spring Integration and Batch •  Auto-Configuration, Bindings

XD

Container

Modules

Admin

Spring Cloud Data Flow

Spring Cloud Stream

Modules

Spring Cloud Task Modules

Spring Cloud Stream

Spring Cloud Task

•  REST API, Shell, UI •  Module Deployer SPI:

•  Singlenode •  Lattice •  YARN •  Cloud Foundry

From Monolith to Microservices

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Unless otherwise indicated, these slides are © 2013-2015 Pivotal Software, Inc. and licensed under a Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/ 8

@EnableBinding(Source.class) public class Greeter { @InboundChannelAdapter(Source.OUTPUT) public String greet() { return "hello world"; } } @EnableBinding(Sink.class)

public class Logger { @ServiceActivator(inputChannel=Sink.INPUT) public void log(String message) { System.out.println(message); } }

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@Import({...Configuration Classes...}) @EnableIntegration public @interface EnableBinding { /** * A list of interfaces having methods annotated with {@link Input} * and/or {@link Output} to indicate bindable components. */ Class<?>[] value() default {}; }

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public interface Source {

String OUTPUT = "output";

@Output(Source.OUTPUT) MessageChannel output(); } public interface Sink {

String INPUT = "input";

@Input(Sink.INPUT) SubscribableChannel input(); }

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@EnableBinding(Source) class Greeter { @InboundChannelAdapter(Source.OUTPUT) String greet() { 'hello world' } } @EnableBinding(Sink)

class Logger { @ServiceActivator(inputChannel=Sink.INPUT) void log(String msg) { println msg } }

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DEMO: Hello World

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time log

$ java –jar time-source.jar $ java –jar log-sink.jar

Boot App

Rabbit

Boot App

Binder

Redis Ka!a

Channel Binders

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Channel Binder Starters

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<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-stream-kafka</artifactId> </dependency>

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-stream-rabbit</artifactId> </dependency>

<dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-stream-redis</artifactId> </dependency>

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DEMO: Channel Binders

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Configuration Properties

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@EnableBinding(Source.class) @EnableConfigurationProperties(TimeSourceProperties.class) public class TimeSource { @Autowired private TimeSourceProperties properties; ... } @ConfigurationProperties

public class TimeSourceProperties { private String format = "yyyy-MM-dd HH:mm:ss"; @DateFormat public String getFormat() { return this.format; } public void setFormat(String format) { this.format = format; } }

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DEMO: Configuration Properties

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Partitioning

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$ java –jar http-source.jar --server.port=9000 --spring.cloud.stream.bindings.output.destination=demo --spring.cloud.stream.bindings.output.partitionKeyExpression=payload --spring.cloud.stream.bindings.output.partitionCount=2 $ java -jar log-sink.jar --server.port=8081 --spring.cloud.stream.bindings.input.destination=demo --spring.cloud.stream.bindings.input.partitioned=true --spring.cloud.stream.instanceIndex=0 --spring.cloud.stream.instanceCount=2 $ java -jar log-sink.jar --server.port=8082 --spring.cloud.stream.bindings.input.destination=demo --spring.cloud.stream.bindings.input.partitioned=true --spring.cloud.stream.instanceIndex=1 --spring.cloud.stream.instanceCount=2

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DEMO: Partitioning Streams

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Runtime Portability

•  Spring Boot Property Binding

•  command-line args

•  System Properties

•  Environment Variables

•  Properties/YAML Files

•  Spring Profiles

•  cloud

•  lattice

•  Spring Boot Auto Configuration

•  Spring Cloud Connectors

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DEMO: Cloud Deployment

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spring-cloud-dataflow

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DEMO: Spring Cloud Data Flow

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Cloud Native Data Flow Orchestration: Wednesday 8:30-10am

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