Cloud Foundry for Spring Developers

Agenda§  Overview§  Deployment§  Debugging§  Profiling§  Agnostic War Files§  Modular Cloud Apps 2

What is Cloud Foundry? 3

Three Layers of Cloud Computing§  SaaS •  Software as a Service§  PaaS •  Platform as a Service§  IaaS •  Infrastructure as a Service 5

Choice of clouds .js Data Services Private Clouds … Msg Services Public Clouds .COM Other Micro Services Clouds 6

Broad Support for Languages/Application Frameworks§  JVM •  Spring, Grails, Roo, Lift, plain Java§  Ruby •  Rails, Sinatra§  Node.js§  Community contributions •  Erlang, Python, PHP 7

JVM Frameworks§  Unit of deployment: Java WAR files •  Can run any standard War file •  Servlet 2.5 •  Don’t assume particular container§  Spring, Grails, Lift framework •  Auto-reconfiguration goodies 8

Services§  Relational database •  Postgres •  MySQL§  Key-value store •  Redis§  Document store •  MongoDB§  Messaging •  RabbitMQ 9

Open Source§  Source code available under Apache License v2.0 •  https://github.com/cloudfoundry/•  VCAP •  https://github.com/cloudfoundry/vcap•  Project Website •  http://cloudfoundry.org/ 10

Logical View 11

Architecture Architecture 25 Thursday, October 27, 11 12

Deployment Options 13

Deployment Options§  VMC •  Ruby based command line tool§  SpringSource Tool Suite (STS)§  Grails§  Spring Roo Cloud Foundry Addon§  Cloud Foundry Maven Plugin§  vcap-java-client •  Used by STS and Cloud Foundry Maven Plugin 14

DEMODeployment Options 15

Debugging 16

Debugging§  Start Cloud Foundry applications in debug mode§  Set Break Points for Micro Cloud Foundry§  STS 2.8.1 supports it§  Coming with Micro Cloud Foundry 1.1.1 (Currently RC) 17

Caldecott§  TCP over HTTP tunnel§  Local client§  Remote server 18

Caldecott - Multiple Services and Sessions§  One vcc server instance •  Manages multiple tunnels§  One vcc client instance per service •  Multiple local apps may share a client if they connect to the same remote server:port •  Each listens on different local port 19

DEMODebugging 20

Profiling 21

Profiling – Spring Insight§  Providing real-time application runtime performance and behavior information for Java Spring applications§  Beta available for CloudFoundry.com§  Signup at: insight.cloudfoundry.com§  Write your own plugins •  https://github.com/SpringSource/spring-insight-plugins 22

DEMOSpring Insight for Cloud Foundry 23

Agnostic War Files 24

Agnostic War Files – Toolbox§  Auto Reconfiguration§  Cloud Namespace§  Spring 3.1 Profiles 25

Agnostic War Files – Auto Reconfiguration§  Move existing Applications easily to Cloud Foundry§  Makes 2 modifications at deploy time: •  Adds additional Jar •  Updates web.xml§  BeanFactoryPostProcessor examines the application context before creating beans§  Swaps existing beans of matching types 26

Agnostic War Files – Auto Reconfiguration Service Type Replaced Bean Type MySQL javax.sql.DataSource Postgres javax.sql.DataSource Redis org.sf.data.redis.connection.RedisConnectionFactory MongoDB org.sf.data.document.mongodb.MongoDbFactory RabbitMQ org.sf.amqp.rabbit.connection.ConnectionFactory 27

Agnostic War Files – Auto Reconfiguration§  Limitations •  one service of a given service type •  one bean of the matching type •  If application does not follow limits, auto-reconfiguration mechanism will not take place 28

Agnostic War Files – Cloud Namespace§  Explicit configuration of Cloud Foundry Services§  Finer grained control of configuration parameters§  Necessary when configuring multiple services of same type 29

Agnostic War Files – Cloud Namespace§  Setup – Maven<dependency> <groupId>org.cloudfoundry</groupId> <artifactId>cloudfoundry-runtime</artifactId> <version>0.8.1</version></dependency>§  Setup – Spring Application Context<?xml version="1.0" encoding="UTF-8"?><beans … xmlns:cloud="http://schema.cloudfoundry.org/spring" xsi:schemaLocation=“http://schema.cloudfoundry.org/spring http://schema.cloudfoundry.org/spring/cloudfoundry-spring-0.8.xsd"> 30

Available Namespace Elements§  Define and use a DataSource <cloud:data-source id="dataSource" /> <bean id="jdbcTemplate” class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource" /> </bean>§  Optional Subelements •  <cloud:connection> •  <cloud:pool> 31

Available Namespace Elements§  MongoDB Support •  <cloud:mongo-db-factory>§  Redis Support •  <cloud:redis-connection-factory>§  RabbitMQ •  <cloud:rabbit-connection-factory>§  Autocreate Services •  <cloud:service-scan> 32

Agnostic War Files – Spring Profiles§  Spring 3.1 adds new support for environments§  Deploy to Cloud Foundry and Stand-alone Containers<bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> <constructor-arg ref="mongoDbFactory" /></bean><beans profile="default"> <mongo:db-factory id="mongoDbFactory" dbname="pwdtest" host="127.0.0.1" port="27017" username="test_user" password=”s3cr3t" /></beans><beans profile="cloud"> <cloud:mongo-db-factory id="mongoDbFactory" /></beans> 33

Modular Cloud Apps 34

Monolithic Enterprise Application 35

Benefits of App-level Modularity§  Efficient Elasticity§  Fault Isolation§  Dynamic Configuration§  “always-on”/Rolling Upgrades 36

Modularized Enterprise Application 37

DEMOSpring Integration 38

Resources 39

Resources§  Cloud Foundry on Ubuntu http://blog.dustinkirkland.com/2011/08/howto-install-cloudfoundry-server- paas.html§  VMC http://support.cloudfoundry.com/entries/20012337-getting-started-guide- command-line-vmc-users http://cloudfoundry.zendesk.com/entries/20012462-getting-started-guide-sts-users http://blog.dustinkirkland.com/2011/07/getting-started-with-cloudfoundry.html http://blog.cloudfoundry.com/post/9037486110/vmc-everywhere 40

Resources§  Cloud Foundry Maven Plugin http://blog.springsource.com/2011/09/22/rapid-cloud-foundry-deployments-with- maven/ https://github.com/cloudfoundry/vcap-java-client/tree/master/cloudfoundry-maven- plugin (Sources + Reference Documentation)§  Caldecott http://blog.cloudfoundry.com/post/12928974099/now-you-can-tunnel-into-any- cloud-foundry-data-service§  Cloud Foundry Samples https://github.com/SpringSource/cloudfoundry-samples 41

Resources§  Spring Auto Reconfiguration http://blog.springsource.org/2011/11/04/using-cloud-foundry-services-with-spring- part-2-auto-reconfiguration/§  Spring Insight for Cloud Foundry http://insight.cloudfoundry.com/§  Cloud Foundry Namespace http://blog.springsource.org/2011/11/09/using-cloud-foundry-services-with-spring- applications-part-3-the-cloud-namespace/§  Spring Profiles http://blog.springsource.org/2011/11/10/using-cloud-foundry-services-with-spring- part-4-%E2%80%93-spring-profiles/ 42

Resources§  Spring Integration http://www.springsource.org/spring-integration https://github.com/SpringSource/spring-integration§  Samples https://github.com/SpringSource/cloudfoundry-samples https://github.com/markfisher/springone-wgrus 43

THANK YOU! Sign up for a free account at: http://www.cloudfoundry.com/Email: ghillert@vmware.comTwitter: https://twitter.com/ghillertBlog: http://blog.hillert.com 44

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Cloud Foundry for Spring Developers

by Gunnar Hillert

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