Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 1

A New Configuration Standard for Java EE Mike Keith Oracle

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 3 The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracles products remains at the sole discretion of Oracle.

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 4 Program Agenda Defining the Problem Consultation and Feedback Goals and Use Cases Sample Walkthroughs Configuration API Summary

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 5 What is configuration, anyway? Many different interested parties, many things to configure Leads to divergent views on what configuration is – Setup for a given server environment – virtualization, installation, etc. – Define the parameters of a runtime – localization, etc. – Deployment description – Applications to deploy, etc. – Technology-specific components – CDI beans, wirings, etc. – Resource-specific settings – data sources, message queues, etc. – Scripting facility Different granularities, varying levels of applicability Defining the Problem

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 6 Charting a Course After consulting with: A number of individuals and internal groups Individuals and companies active in enterprise Java Active JUGs Developers and software professionals at 3 major conferences on 3 different continents We have more than enough feedback and interest to chart a course! Getting Feedback

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 7 Existing Products VMware Spring Config – XML and annotations to configure Spring beans and overall behavior JBoss Seam Config – XML namespace strangeness to configure CDI beans Oracle Metadata Service (MDS) – Extensive general purpose support for many different kinds of artifacts Chef and Puppet – Server-based Ruby scripting support for network management The Landscape

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 8 Lofty Ambitions Functionality: – Solve and standardize the most common DevOps-related and cloud deployment problems in the field today Design: – Create an initially modest service that can be enhanced in subsequent releases Usability: – A solution that offers a great CX (Configuration Experience!) for DevOps and developers Goals

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 9 Most Common Requests and Use Cases Cloud deployment – Wire a deployed application to multiple decoupled cloud services Single application, multiple deployments – Dont want to rip open application for each deployment to add custom resources File-based configuration deployment and overrides – Dont require manual non-standard deployment tool to override Environment properties 2.0 – Available to one or to all apps, simple to define and manage Use Cases (1)

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 10 Most Common Requests and Use Cases Deployment profiles – Development, Testing, Production, etc – Platform-wide standard of existing tech solutions (e.g. JSF Stages, CDI Alternatives) Multiple modes of configuration access – Injection, integration with CDI – Java API for runtime access Use Cases (2)

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 11 Most Common Requests and Use Cases Scoped configuration – Visibility and accessibility settings on configurations – e.g. global/app resources Java SE usage – Testability with other EE technologies that run outside the container – Standalone applications with standard configuration needs Dynamic SaaS tenant configuration – Admin wants to be able to add tenants (w/o restart) – SaaS application uses an API to look up a given tenant configuration Use Cases (3)

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 12 Other Requests Versioned configuration – Dependency on a specific configuration version Dynamic configuration change notification – Some apps want to be notified when a configuration change occurs Existing Java EE config file integration – Single file merge of existing configs or config fragments Clustering support – Node and cluster-based domain configurations Deferred Until Later

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 13 Starting Point Configuration archives (e.g.jar or.car) – Created and deployed separately from application archives – Contain resource and property configuration definitions Container integrates deployed configurations with existing services Applications can declare dependencies on named configurations Injection into Java EE managed components Java API to access configuration variables and resources Offer functionality applicable to Java SE Feature List

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 14 Example – Application Perspective Development App Archive (EAR, WAR, JAR) MyApp class DataSource someDS;... }... java:global/jdbc/myDS... persistence.xml application.xm l AppBean web.xml ${vendor}/*...

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 15 Example – Configuration Perspective Development Configuration Archive name="java:global/jdbc/MyDS", className="org…DataSource", url="jdbc:…/myDB",... value="acme") class ConfigClass { } configuration.xm l ConfigClass

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 16 Example – Container Perspective Deployment Java EE Container App ( EAR, WAR, JAR) Config (CAR/JAR) Configuration Service CDI Container

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 17 Configuration API App Archive (EAR, WAR, JAR) interface ConfigurationService { Configuration getConfiguration(String configName); Collection getConfigurations(String nameFilter); Object getProperty(String propertyName); T getProperty(String propertyName, Class valueClass) } interface Configuration { String getName(); String getProfile(); boolean isGlobal(); Object getProperty(String propertyName); T getProperty(String propertyName, Class valueClass) }

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 18 Configuration API - Example App Archive (EAR, WAR, public class ApplicationBean ConfigurationService configService; String public void initialize() { vendor = configService.getProperty("vendor", String.class); } //... }

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 19 Open Questions Runtime support – How much runtime support do we need out of the gate? Tooling – What is the role of tools in configuration? – Generation, delta computation, etc? Integration – How tight should the integration be in the container? Standalone operation – Where should the lines be drawn around the standalone service?

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 20 Summary Decouple the configuration from the application it is configuring Enables more flexible deployment in cloud environments Provides customization options for multitenant applications Platform-wide deployment profile settings – Increased development, testing and production control Benefits many areas and roles: – Operations, Developers, Application vendors, Cloud providers Start modestly but design for the future

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 21 The preceding is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracles products remains at the sole discretion of Oracle.

Copyright © 2013, Oracle and/or its affiliates. All rights reserved. 22 Graphic Section Divider

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