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Spring Roo
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<h2 id="motivation-and-history">Motivation and history</h2> <p>Spring Roo's mission statement is to <i>"fundamentally improve Java developer productivity without compromising engineering integrity or flexibility"</i>.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p><p>The technology was first demonstrated during the opening keynote at the SpringOne Europe developer conference on 27 April 2009, with an initial alpha release concurrently being published. During the keynote an application was built live on-stage that would be used by conference attendees to vote on the preferred name for the project (which at that time was codenamed "Roo" within <a href="/facts/SpringSource/YjNqrMAM">SpringSource</a>).<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> Ultimately the name "Spring Roo" was preferred over alternatives including Spring Boost, Spring Spark, Spring HyperDrive and Spring Dart.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> </p><p>Several releases followed,<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> with the Roo 1.0.0.RELEASE (<a href="/facts/Development_stage/z4Q4RElA">general availability</a>) released in December 2009. In October 2010, Spring Roo 1.1.0.RELEASE was released. The 1.1.0 release moved to an OSGi foundation with associated add-on discovery model, plus added support for incremental database reverse engineering, Spring MVC page complexity reduction, Google Web Toolkit, Google App Engine, Apache Solr, JSON and smaller features like serializable automation.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> The current Roo project engineers are employed by SpringSource and as such Roo releases typically support the latest available releases of other <a href="/facts/Spring_Framework/ajIwLM73">Spring</a> portfolio projects. </p><p>In 2014 <a href="http://www.disid.com/">DISID</a> takes over the leadership of the open source framework Spring Roo after the partnership agreement with Pivotal. They collaborate on further development of the Spring Roo project. Roo will continue in its goal of providing a code-gen style of RAD framework. </p><p>The Spring Roo project will remain as an open source project under Spring, maintaining the same current licensing policy. Both Pivotal and DISID are calling on the Spring and Java communities for anyone who would like to collaborate in the project. </p> <h2 id="standards-and-technology-compatibility">Standards and technology compatibility</h2> <p>Roo's default installation facilitates the creation of applications that comply with the following standards and major technologies:<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p> <ul><li><a href="/facts/Apache_ActiveMQ/qxP90TQI">Apache ActiveMQ</a> (as an embedded <a href="/facts/Java_Message_Service/aTzyVj3n">JMS</a> implementation)</li> <li><a href="/facts/Apache_Maven/xHkdXzqa">Apache Maven</a> (version 3.2 or above)</li> <li><a href="/facts/Apache_Tomcat/psmVfM2B">Apache Tomcat</a> (embedded execution support)</li> <li><a href="/facts/AspectJ/0ctawTQj">AspectJ</a> (used for <a href="/facts/Aspect-oriented_programming/HK7CFwan">AOP</a> plus <a href="/facts/Mixin/QHG68mgY">mixins</a> to achieve <a href="/facts/Separation_of_concerns/Tx8jawNT">separation of concerns</a>)</li> <li>AspectJ Development Tools (Eclipse plugin)</li> <li>Bootstrap (version 3.3.6 or above)</li> <li><a href="/facts/Cloud_computing/guhg0FGV">Cloud computing</a> (via SpringSource Cloud Foundry, <a href="/facts/Google_App_Engine/DyPrUG6J">Google App Engine</a> and VMforce)</li> <li><a href="/facts/Eclipse_IDE/YoqHVjas">Eclipse IDE</a> (concurrent execution and project metadata creation)</li> <li><a href="/facts/EclipseLink/atNU4rva">EclipseLink</a> (as a <a href="/facts/Java_Persistence_API/mdw15jQI">JPA</a> implementation)</li> <li><a href="/facts/Hibernate_(Java)/7hHcgTkB">Hibernate</a> (as a <a href="/facts/Java_Persistence_API/mdw15jQI">JPA</a> implementation)</li> <li>Java Bean Validation (JSR 303) (including Hibernate Validator)</li> <li><a href="/facts/Java_API_for_XML_Web_Services/xcIMaPgp">Java API for XML Web Services</a> (both services and clients)</li> <li><a href="/facts/Java_Message_Service/aTzyVj3n">Java Message Service</a> (both message producers and consumers)</li> <li><a href="/facts/Java_Persistence_API/mdw15jQI">Java Persistence API</a> (multiple implementations)</li> <li><a href="/facts/Java_Transaction_API/Q694eVFM">Java Transaction API</a> (via <a href="/facts/Spring_Framework/ajIwLM73">Spring</a> transaction abstraction)</li> <li><a href="/facts/Java_(programming_language)/9ScgFyAL">Java</a> (version 5, 6 or 7). Java 7 is supported since Roo 1.2.4.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></li> <li><a href="/facts/JQuery/YIqFG0ww">JQuery</a> (version 1.11 or above)</li> <li><a href="/facts/JSON/bs1rUAhd">JSON</a> (REST support)</li> <li><a href="/facts/JUnit/zlddF9S2">JUnit</a> (automated tests for user projects)</li> <li><a href="/facts/Log4J/fo0Eunj8">Log4J</a> (installation and configuration)</li> <li><a href="/facts/OSGi/qh2yzbsu">OSGi</a> (the Roo tool is built on OSGi)</li> <li><a href="/facts/Representational_State_Transfer/Q58zfr5h">Representational State Transfer (REST)</a></li> <li>Spring Boot (version 1.4 or above)</li> <li>Spring Data JPA (version 1.10 or above)</li> <li><a href="/facts/Spring_Framework/ajIwLM73">Spring Framework</a> (version 4 or above)</li> <li><a href="/facts/Spring_Security/G3YvuLoV">Spring Security</a> (version 4 or above)</li> <li><a href="/facts/Spring_Web_Flow/xvYvYNpK">Spring Web Flow</a> (installation and flow definition)</li> <li>SpringSource Tool Suite (STS has an embedded Roo shell and Roo command helpers)</li> <li><a href="/facts/Thymeleaf/yuuyLXSz">Thymeleaf</a> (version 3 or above)</li></ul> <p>The above list can be augmented through additional Roo add-ons, which provide Roo's method of <a href="/facts/Extensibility/AEPWNwxp">extensibility</a>. </p> <h2 id="user-interface">User interface</h2> <p>Spring Roo's main user interface is a command-line <a href="/facts/Shell_(computing)/Sa67elS7">shell</a>. The shell provides both a <a href="/facts/Command-line_interface/R9JpGmXQ">command-line interface</a> and also a mechanism to host <a href="/facts/Plug-in_(computing)/351Du3Wu">plug-ins</a> (which are called "add-ons" in Roo). One key design goal of Roo is to ensure a user can continue to work in a "natural way", which typically means using their preferred <a href="/facts/Integrated_development_environment/jbEINSQf">integrated development environment</a> (IDE) or <a href="/facts/Text_editor/jPCgtbvN">text editor</a> for most tasks. As such Roo is often loaded in a separate window to the IDE or text editor, and will monitor the file system for changes made by the user outside of Roo. A startup-time scan of a user's project is also performed to determine any changes that may have been made while Roo was not running. </p><p>The user interface shell supports extensive <a href="/facts/Usability/zuAnqu9Q">usability</a> features including <a href="/facts/Command-line_completion/MFaxnWrl">command-line completion</a> (i.e. press TAB), <a href="/facts/Online_help/dAzE62xs">online help</a>, hinting (a form of <a href="/facts/Context-sensitive_help/QSyKqsef">context-sensitive help</a>) and contextual awareness (which provides automatic inference of likely intentions based on recent activity). This allows a user to create a new software project via the Roo shell, or use Roo on an existing project. The following is an example of the commands used by Roo to create a new application plus the Spring Boot Maven plugin <i>run</i> goal to compile and run the application using an embedded HTTP server: </p> $ mkdir hello $ cd hello $ roo.sh roo> project setup --topLevelPackage com.foo roo> jpa setup --provider HIBERNATE --database HYPERSONIC_IN_MEMORY roo> entity jpa --class ~.domain.Timer roo> field string --fieldName message --notNull roo> repository jpa --all roo> service --all roo> web mvc setup roo> web mvc view setup --type THYMELEAF roo> web mvc controller --all --responseType THYMELEAF roo> web mvc controller --all --pathPrefix /api roo> quit $ mvn spring-boot:run <p>The above commands did not need to be typed in full, but rather were completed using TAB. Additionally, the "hint" command could have been used to acquire help at any time. </p> <h2 id="architecture">Architecture</h2> <p>While there are many ways that software can <a href="/facts/Automatic_programming/zrrwX3CW">automatically generate</a> code,<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> Roo operates by generating <a href="/facts/AspectJ/0ctawTQj">AspectJ</a> inter-type declarations (otherwise known as <a href="/facts/Mixin/QHG68mgY">mixins</a> or introductions). This achieves <a href="/facts/Separation_of_concerns/Tx8jawNT">separation of concerns</a>, as the code maintained by Roo is in a different compilation unit from the code a user writes. This means Roo can incrementally modify the AspectJ inter-type declarations that it needs to and leave all other files intact.<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a><a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a><a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> </p><p>Spring Roo uses add-ons to provide all the functionality within and on top of an <a href="/facts/OSGi/qh2yzbsu">OSGi</a> runtime system based on <a href="/facts/Apache_Felix/pqe5WJkX">Apache Felix</a>. </p> <h3>Base add-ons</h3> <p>There are numerous commands available in Roo, depending on which "base add-ons" (those which ship with Roo) and "third-party add-ons" (those that do not ship with Roo) have been installed. The base add-ons shipping with Roo 2.0.x include: </p> <ul><li>Add-On Creator: enables easy creation of third-party Roo add-ons</li> <li>Backup: enables backups to be made to a ZIP file by typing backup</li> <li>Bean Info: exposes JavaBean property, accessor and mutator metadata (primarily used by other add-ons)</li> <li>Configurable: introduces Spring Framework's @Configurable annotation (primarily used by other add-ons)</li> <li>Database reverse engineering: allows incremental reverse engineering of relational databases</li> <li>Data on Demand: provides seed data that is compliant with <a href="/facts/Bean_Validation/b8WaksL3">JSR 303 (JavaBean Validation)</a> annotations present in entities</li> <li>DTO: extensive support for automatically maintaining <a href="/facts/Data_Transfer_Object/K7sRSD4n">Data Transfer Objects</a></li> <li>Email: simplifies setup of <a href="/facts/SMTP/TeCRKDpJ">SMTP</a>-based emails and mail sender support via <a href="/facts/Javamail/PCUfjoP6">Javamail</a></li> <li>Entity: extensive support for automatically maintaining <a href="/facts/Java_Persistence_API/mdw15jQI">Java Persistence API</a> @Entity classes</li> <li>Java Bean: automatically maintains JavaBean getters/setters for classes with an @RooJavaBean annotation</li> <li>JDBC: encapsulates OSGi-compliant access to JDBC drivers shipped in different bundles (primarily used by other add-ons)</li> <li>JMS: simplifies connecting to a <a href="/facts/Java_Message_Service/aTzyVj3n">JMS</a> provider (or embedding <a href="/facts/ActiveMQ/qxP90TQI">ActiveMQ</a>) and sending/receiving JMS messages</li> <li>JPA: installs a specified <a href="/facts/Java_Persistence_API/mdw15jQI">JPA</a> provider and sets up <a href="/facts/JDBC/uUVYg2sB">JDBC</a> accordingly</li> <li>JSON: adds <a href="/facts/JSON/bs1rUAhd">JSON</a> related serialization and deserialization methods to POJOs</li> <li>Logging: sets up <a href="/facts/Log4j/fo0Eunj8">Log4j</a>, including command-based log level configuration</li> <li>Pluralization: provides <a href="/facts/Pluralization/3VjXP7VF">pluralization</a> of nouns (primarily used by other add-ons)</li> <li>Property Editor: manages property editors, as required by <a href="/facts/Spring_Framework/ajIwLM73">Spring</a> <a href="/facts/Model%E2%80%93view%E2%80%93controller/vRbMXjMm">MVC</a></li> <li>Property File: manages <a href="/facts/Java_(programming_language)/9ScgFyAL">Java</a> properties files and provides shell commands to read, set and remove property values</li> <li>Security: sets up <a href="/facts/Spring_Security/G3YvuLoV">Spring Security</a>, including login pages, filters and dependencies</li> <li>Test: produces <a href="/facts/JUnit/zlddF9S2">JUnit</a> integration tests for project classes</li> <li>ToString: produces a valid toString() method for any class with the @RooToString annotation</li> <li>Web Flow: installs the <a href="/facts/Spring_Web_Flow/xvYvYNpK">Spring Web Flow</a> and creates a default flow</li> <li>Web MVC: maintains the view layer based on <a href="/facts/Spring_Framework/ajIwLM73">Spring</a> <a href="/facts/Model%E2%80%93view%E2%80%93controller/vRbMXjMm">MVC</a> plus <a href="/facts/Thymeleaf/yuuyLXSz">Thymeleaf</a> templates and the <a href="/facts/RESTful/Q58zfr5h">RESTful</a> API</li> <li>WS: produces SOAP services and SOAP clients</li></ul> <h3>Roo core modules</h3> <p>Roo also includes a core set of modules that provide a hosted execution environment for different add-ons. These major modules include: </p> <ul><li>Support: used by core modules and add-ons for common utility class support services</li> <li>Metadata: provides a <a href="/facts/Metadata/qt35z79C">metadata</a> service provider interface and implementation that includes dependency registration and caching</li> <li>File monitor: publishes <a href="/facts/Event_(computing)/0YdM6AoB">events</a> following detected file system changes (the default implementation uses auto-scaled disk polling)</li> <li>File undo: provides a file <a href="/facts/Undo/ELQMGH4k">undo</a> facility for use by the process manager</li> <li>Project: abstracts typical end user project build systems like <a href="/facts/Apache_Maven/xHkdXzqa">Apache Maven</a> and <a href="/facts/Apache_Ant/CT6ABXEx">Apache Ant</a></li> <li>Process manager: offers an <a href="/facts/ACID/XdHkYzHN">ACID</a>-like <a href="/facts/File_system/FdPm90uc">file system</a> abstraction that includes disk rollback and process synchronization</li> <li>Classpath: performs <a href="/facts/Abstract_syntax_tree/73AUK1jI">abstract syntax tree</a> parsing and type binding of Java and <a href="/facts/AspectJ/0ctawTQj">AspectJ</a> compilation units</li> <li>Felix: integrates with <a href="/facts/Apache_Felix/pqe5WJkX">Apache Felix</a>, such as providing "osgi" commands in the Roo shell</li> <li>OBR: adds <a href="/facts/Apache_Felix/pqe5WJkX">Apache Felix</a> OSGi Bundle Repository capabilities</li> <li>URL Stream: encapsulates access to downloads in different host environments (Roo shell, IDE embedding) and enforces the <a href="/facts/Pretty_Good_Privacy/4BELG9BW">Pretty Good Privacy</a>-based httppgp:// protocol handler</li></ul> <h2 id="differentiation">Differentiation</h2> <p>Spring Roo differentiates from other convention-over-configuration rapid application development tools in the following major ways:<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> </p> <ol><li>Java platform productivity: Roo provides a productivity solution for Java developers. It does not require the user to program in any language other than <a href="/facts/Java_(programming_language)/9ScgFyAL">Java</a>. It also uses mainstream Java enterprise application standards and technologies (as listed above) to maximize reuse of existing developer knowledge, skills and experience.</li> <li>Usability: Roo's shell is designed to provide a discoverable, easy-to-use environment that minimizes training requirements. Roo annotations all start with @Roo to facilitate code assist (<a href="/facts/Command_line_completion/MFaxnWrl">command line completion</a> in IDEs). Users can use their IDE for all operations and do not need to be aware of Roo running. Roo also supports users editing their files when Roo is not running.</li> <li>No runtime: Roo does not provide a <a href="/facts/Run_time_(program_lifecycle_phase)/lCxKsrzB">runtime</a> API or require specific runtime components. This ensures there is no Roo-related <a href="/facts/CPU/Jxp1bqMV">CPU</a>, <a href="/facts/Memory_(computers)/hQKVQ51J">memory</a> and <a href="/facts/Disk_storage/hnsXRb5X">disk storage</a> resource consumption at runtime. Roo code is optimized for small-footprint <a href="/facts/Cloud_computing/guhg0FGV">cloud</a> deployment and high <a href="/facts/Scalability/jh7JomPa">scalability</a> use cases.</li> <li>Avoids lock-in: Roo can be rapidly removed from a user project, which is useful to protect against <a href="/facts/Vendor_lock-in/BLndHDVl">vendor lock-in</a>. This is possible because there is no runtime component to remove, @Roo annotations are "source retention" only (ensuring they are not preserved in compiled *.class files)<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a> and Roo's AspectJ <a href="/facts/Mixins/QHG68mgY">inter-type declarations</a> can be "pushed in" to standard *.java compilation units.<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a><a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></li> <li>Extensibility: Roo's separation of core infrastructure and base add-ons intends to allow third parties to easily extend Roo.<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a><a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a></li></ol> <h2 id="see-also">See also</h2> <ul> <li>Free and open-source software portal</li><li>Computer programming portal</li></ul> <ul><li><a href="/facts/Grails_(framework)/J2QV6vIn">Grails (framework)</a></li> <li><a href="/facts/Griffon_(framework)/Mg9uENhX">Griffon (framework)</a> – A Desktop framework inspired by Grails</li> <li><a href="/facts/Play_Framework/kf8eygKu">Play Framework</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="http://www.springsource.org/roo">Official website</a> </li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"InfoWorld: SpringSource CEO to tout Roo, a new Java enhancement" by Paul Krill; Dated 2009-06-01. <a href="http://www.infoworld.com/t/development-frameworks/springsource-ceo-tout-roo-new-java-enhancement-215" target="_blank">http://www.infoworld.com/t/development-frameworks/springsource-ceo-tout-roo-new-java-enhancement-215</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"SD Times: Roo released to handle repetitive Spring tasks" Archived 2012-02-25 at the Wayback Machine by Alex Handy; Dated 2009-10-19. <a href="http://www.sdtimes.com/link/33843" target="_blank">http://www.sdtimes.com/link/33843</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Spring Roo reference documentation", Mission Statement section; Retrieved 2010-2-21. <a href="http://static.springsource.org/spring-roo/reference/html/background.html#background-mission" target="_blank">http://static.springsource.org/spring-roo/reference/html/background.html#background-mission</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Tech Videos: The Future of Java Innovation" Archived 2009-10-09 at the Wayback Machine by Rod Johnson (CEO of SpringSource); Retrieved 2009-10-17. <a href="http://www.bestechvideos.com/2009/06/11/springone-europe-2009-keynote-the-future-of-java-innovation" target="_blank">http://www.bestechvideos.com/2009/06/11/springone-europe-2009-keynote-the-future-of-java-innovation</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Spring Roo reference documentation", History section; Retrieved 2010-2-21. <a href="http://static.springsource.org/spring-roo/reference/html/background.html#background-history" target="_blank">http://static.springsource.org/spring-roo/reference/html/background.html#background-history</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"InfoQ: Spring Roo 1.0 M1 Released" by Srini Penchikala; Dated 2009-5-31. <a href="http://www.infoq.com/news/2009/05/spring-roo-1.0-m1-release" target="_blank">http://www.infoq.com/news/2009/05/spring-roo-1.0-m1-release</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"Jira issue tracking for Spring Roo Project releases"; Retrieved 2010-2-21. <a href="https://jira.springsource.org/browse/ROO#selectedTab=com.atlassian.jira.plugin.system.project%3Aversions-panel" target="_blank">https://jira.springsource.org/browse/ROO#selectedTab=com.atlassian.jira.plugin.system.project%3Aversions-panel</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>"A Big Hop Forward: Spring Roo 1.1.0 Is Released!" Archived 2010-10-28 at the Wayback Machine, by Ben Alex (lead of Spring Roo at SpringSource); Retrieved 2010-10-27. <a href="http://blog.springsource.com/2010/10/27/spring-roo-1-1-0-is-released/" target="_blank">http://blog.springsource.com/2010/10/27/spring-roo-1-1-0-is-released/</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>"TechCast: Spring Roo podcast" Archived 2010-02-23 at the Wayback Machine by Ken Rimple; Retrieved 2010-2-21. <a href="http://chariottechcast.libsyn.org/index.php?post_id=551262" target="_blank">http://chariottechcast.libsyn.org/index.php?post_id=551262</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"Spring Roo 1.2.4.RELEASE available now " Dated 2013-10-17. <a href="http://forum.spring.io/forum/spring-projects/roo/128539-spring-roo-1-2-4-release-available-now" target="_blank">http://forum.spring.io/forum/spring-projects/roo/128539-spring-roo-1-2-4-release-available-now</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>"InfoQ: Role of Code Generation in Java Development" by Srini Penchikala; Dated 2009-9-3. <a href="http://www.infoq.com/news/2009/09/codegen-java-development" target="_blank">http://www.infoq.com/news/2009/09/codegen-java-development</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>"InfoQ: Introduction to Spring Roo 1.0.0 Video Presentation", by Ben Alex (lead of Spring Roo at SpringSource); Retrieved 2010-2-21. <a href="http://www.infoq.com/presentations/Introducing-Spring-Roo" target="_blank">http://www.infoq.com/presentations/Introducing-Spring-Roo</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>"JAX Italia 2009 Conference: Spring Roo" by Massimiliano Dessì; Retrieved 2010-2-21. <a href="https://www.slideshare.net/desmax74/spring-roo-jaxitalia09" target="_blank">https://www.slideshare.net/desmax74/spring-roo-jaxitalia09</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>"Philadelphia Java User Group: Spring Roo" by Ken Rimple; Retrieved 2010-2-21. <a href="https://www.slideshare.net/krimple/philly-spring-ug-roo-overview" target="_blank">https://www.slideshare.net/krimple/philly-spring-ug-roo-overview</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>"Spring Roo Home Page"; Retrieved 2010-2-21. <a href="http://www.springsource.org/roo" target="_blank">http://www.springsource.org/roo</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>"Sun Java 5 JavaDocs for RetentionPolicy.SOURCE" by Sun Microsystems; Retrieved 2009-10-17. <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/annotation/RetentionPolicy.html#SOURCE" target="_blank">http://java.sun.com/j2se/1.5.0/docs/api/java/lang/annotation/RetentionPolicy.html#SOURCE</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>"Push-In Refactoring for AJDT" by Andrew Eisenberg (AJDT project lead at SpringSource); Retrieved 2009-10-17. <a href="http://contraptionsforprogramming.blogspot.com/2009/05/push-in-refactoring-for-ajdt.html" target="_blank">http://contraptionsforprogramming.blogspot.com/2009/05/push-in-refactoring-for-ajdt.html</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>"Eclipse AJDT intertypes and Push-In refactoring" Archived 2010-01-17 at the Wayback Machine by Dhruba Bandopadhyay; Dated 2009-12-31. <a href="http://dhruba.name/2009/12/31/eclipse-ajdt-intertypes-and-push-in-refactoring/" target="_blank">http://dhruba.name/2009/12/31/eclipse-ajdt-intertypes-and-push-in-refactoring/</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>"Italian Java User Group JavaDay IV Conference: Spring Roo Internals" by Massimiliano Dessì; Retrieved 2010-2-21. <a href="https://www.slideshare.net/desmax74/spring-roo-internals-javaday-iv" target="_blank">https://www.slideshare.net/desmax74/spring-roo-internals-javaday-iv</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>"Spring, Roo, and Alfresco Too: What Alfresco Gave to Spring and Why" by Jeff Potts; Dated 2009-12-16. <a href="http://ecmarchitect.com/archives/2009/12/16/1076" target="_blank">http://ecmarchitect.com/archives/2009/12/16/1076</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> </ol>