1. Cloud Foundry for Spring Developers
Gunnar Hillert, Member of Technical Staff, Spring Integration
© 2011 SpringSource, A division of VMware. All rights reserved

2. Agenda
§ Overview
§ Deployment
§ Debugging
§ Profiling
§ Agnostic War Files
§ Modular Cloud Apps
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3. What is Cloud Foundry?
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4. 4

5. Three Layers of Cloud Computing
§ SaaS
• Software as a Service
§ PaaS
• Platform as a Service
§ IaaS
• Infrastructure as a Service
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6. Choice of clouds
.js
Data
Services
Private
Clouds
…
Msg
Services
Public
Clouds
.COM
Other Micro
Services
Clouds
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7. Broad Support for Languages/Application Frameworks
§ JVM
• Spring, Grails, Roo, Lift, plain Java
§ Ruby
• Rails, Sinatra
§ Node.js
§ Community contributions
• Erlang, Python, PHP
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8. 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
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9. Services
§ Relational database
• Postgres
• MySQL
§ Key-value store
• Redis
§ Document store
• MongoDB
§ Messaging
• RabbitMQ
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10. 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/
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11. Logical View
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12. Architecture
Architecture
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Thursday, October 27, 11 12

13. Deployment Options
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14. 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
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15. DEMO
Deployment Options
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16. Debugging
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17. 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)
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18. Caldecott
§ TCP over HTTP tunnel
§ Local client
§ Remote server
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19. 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
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20. DEMO
Debugging
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21. Profiling
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22. 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
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23. DEMO
Spring Insight for Cloud Foundry
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24. Agnostic War Files
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25. Agnostic War Files – Toolbox
§ Auto Reconfiguration
§ Cloud Namespace
§ Spring 3.1 Profiles
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26. 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
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27. 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
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28. 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
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29. 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
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30. 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">
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31. 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>
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32. 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>
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33. 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>
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34. Modular Cloud Apps
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35. Monolithic Enterprise Application
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36. Benefits of App-level Modularity
§ Efficient Elasticity
§ Fault Isolation
§ Dynamic Configuration
§ “always-on”/Rolling Upgrades
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37. Modularized Enterprise Application
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38. DEMO
Spring Integration
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39. Resources
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40. 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
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41. 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
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42. 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/
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43. 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
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44. THANK YOU!
Sign up for a free account at: http://www.cloudfoundry.com/
Email: ghillert@vmware.com
Twitter: https://twitter.com/ghillert
Blog: http://blog.hillert.com
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