{"id":78391,"date":"2025-08-23T23:20:35","date_gmt":"2025-08-23T23:20:35","guid":{"rendered":"http:\/\/bangla.sitestree.com\/?p=78391"},"modified":"2025-08-23T23:20:36","modified_gmt":"2025-08-23T23:20:36","slug":"code-refactoring-in-java-ee","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=78391","title":{"rendered":"Code Refactoring in Java EE"},"content":{"rendered":"\n<p>From AI Tools\/OpenAI\/Internet<\/p>\n\n\n\n<p>&#8220;<\/p>\n\n\n\n<p>Absolutely! Here\u2019s a <strong>concise, copyright-free summary<\/strong> of Java EE code refactoring<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Java EE Code Refactoring: Best Practices<\/strong><\/h3>\n\n\n\n<p>Refactoring in <strong>Java EE<\/strong> helps improve code quality, maintainability, and performance without changing functionality. Here are some key practices:<\/p>\n\n\n\n<p><strong>1. General Refactoring<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Remove duplicate code with helper methods or utility classes.<\/li>\n\n\n\n<li>Break long methods into smaller, focused functions.<\/li>\n\n\n\n<li>Use meaningful names for classes, methods, and variables.<\/li>\n\n\n\n<li>Replace hard-coded values with constants or enums.<\/li>\n\n\n\n<li>Encapsulate fields with getters\/setters.<\/li>\n<\/ul>\n\n\n\n<p><strong>2. Refactoring Java EE Components<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>EJBs:<\/strong> Extract shared logic into stateless beans, use dependency injection instead of manual JNDI lookups.<\/li>\n\n\n\n<li><strong>JPA:<\/strong> Use DTOs instead of exposing entities, avoid N+1 queries, and consolidate repetitive validations with bean validation.<\/li>\n\n\n\n<li><strong>Servlets\/JSPs:<\/strong> Keep Servlets thin; move business logic to service layers; use JSTL or custom tags for repetitive JSP code.<\/li>\n\n\n\n<li><strong>REST Services:<\/strong> Handle repeated request logic with filters\/interceptors, use DTOs, and centralize exception handling.<\/li>\n\n\n\n<li><strong>CDI:<\/strong> Use <code>@Inject<\/code> to decouple components and define proper bean scopes.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Architecture &amp; Design<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Separate concerns with service, DAO, and controller layers.<\/li>\n\n\n\n<li>Centralize exception handling and logging.<\/li>\n\n\n\n<li>Move configuration values to properties files or environment variables.<\/li>\n<\/ul>\n\n\n\n<p><strong>4. Performance &amp; Efficiency<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use connection pooling and caching.<\/li>\n\n\n\n<li>Optimize lazy vs. eager loading in JPA.<\/li>\n\n\n\n<li>Batch database operations when possible.<\/li>\n<\/ul>\n\n\n\n<p><strong>5. Testing &amp; Maintainability<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Write unit tests for services and DAOs.<\/li>\n\n\n\n<li>Make code testable by avoiding static dependencies.<\/li>\n\n\n\n<li>Use mocking frameworks for isolated component testing.<\/li>\n<\/ul>\n\n\n\n<p><strong>Summary:<\/strong><br>Refactoring in Java EE focuses on <strong>separation of concerns, decoupling, eliminating duplication, optimizing persistence, centralizing logging and exceptions, and improving testability<\/strong>. Following these practices keeps enterprise applications clean, efficient, and easier to maintain.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n\n\n\n<p>&#8220;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>From AI Tools\/OpenAI\/Internet &#8220; Absolutely! Here\u2019s a concise, copyright-free summary of Java EE code refactoring Java EE Code Refactoring: Best Practices Refactoring in Java EE helps improve code quality, maintainability, and performance without changing functionality. Here are some key practices: 1. General Refactoring 2. Refactoring Java EE Components 3. Architecture &amp; Design 4. Performance &amp; &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=78391\">Continue reading<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1975],"tags":[],"class_list":["post-78391","post","type-post","status-publish","format-standard","hentry","category-anything-java","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":66336,"url":"http:\/\/bangla.sitestree.com\/?p=66336","url_meta":{"origin":78391,"position":0},"title":"J2EE:Java EE Code Samples &amp; Apps #Java Short Notes","author":"Author-Check- Article-or-Video","date":"July 18, 2021","format":false,"excerpt":"Java EE Code Samples & Apps From: http:\/\/sitestree.com\/?p=4978 Categories:Java Short NotesTags: Post Data:2010-07-02 21:17:05 Shop Online: https:\/\/www.ShopForSoul.com\/ (Big Data, Cloud, Security, Machine Learning): Courses: http:\/\/Training.SitesTree.com In Bengali: http:\/\/Bangla.SaLearningSchool.com http:\/\/SitesTree.com 8112223 Canada Inc.\/JustEtc: http:\/\/JustEtc.net (Software\/Web\/Mobile\/Big-Data\/Machine Learning) Shop Online: https:\/\/www.ShopForSoul.com\/ Medium: https:\/\/medium.com\/@SayedAhmedCanada","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":23293,"url":"http:\/\/bangla.sitestree.com\/?p=23293","url_meta":{"origin":78391,"position":1},"title":"#laravel laracast intermediate, Code Coverage, Hooking into New Relic, Say Hello to Forge","author":"Author-Check- Article-or-Video","date":"March 28, 2021","format":false,"excerpt":"Code CoverageBe Awesome in PHPStorm - Episode #23 TOOLING \u2022 JUN 25TH, 2014 \u2022 INTERMEDIATE \u2022 4:26 ADD TO WATCHLIST Hooking into New RelicServer Management With Forge - Episode #9 TOOLING \u2022 JUN 24TH, 2014 \u2022 INTERMEDIATE \u2022 2:18 ADD TO WATCHLIST Validation and DecoratorsCommands and Domain Events - Episode\u2026","rel":"","context":"In &quot;Laravel&quot;","block_context":{"text":"Laravel","link":"http:\/\/bangla.sitestree.com\/?cat=1852"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":24213,"url":"http:\/\/bangla.sitestree.com\/?p=24213","url_meta":{"origin":78391,"position":2},"title":"#laravel Laravel, PHPSpec, and Refactoring, PHPSpec is So Good, Easy HTTP Requests, Better Error Tracking","author":"Author-Check- Article-or-Video","date":"April 5, 2021","format":false,"excerpt":"Laravel, PHPSpec, and RefactoringLARAVEL \u2022 MAR 12TH, 2014 \u2022 ADVANCED \u2022 15:14 ADD TO WATCHLIST Cache Tags and MemcachedLARAVEL \u2022 MAR 10TH, 2014 \u2022 BEGINNER \u2022 8:16 ADD TO WATCHLIST Subscriptions With StripeLARAVEL \u2022 MAR 6TH, 2014 \u2022 INTERMEDIATE \u2022 21:16 ADD TO WATCHLIST Continuous Integration With TravisLARAVEL \u2022 MAR\u2026","rel":"","context":"In &quot;Laravel&quot;","block_context":{"text":"Laravel","link":"http:\/\/bangla.sitestree.com\/?cat=1852"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":67476,"url":"http:\/\/bangla.sitestree.com\/?p=67476","url_meta":{"origin":78391,"position":3},"title":"Some New Features in Java EE 6 #Java Short Notes","author":"Author-Check- Article-or-Video","date":"July 23, 2021","format":false,"excerpt":"Some New Features in Java EE 6 Was focused in making the Java EE platform light weight and making the environment easier for the developers Introduced new APIs such as WebBeans 1.0 Made servlet technologies to be more matured Started to prune APIs that are not used much or not\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":78331,"url":"http:\/\/bangla.sitestree.com\/?p=78331","url_meta":{"origin":78391,"position":4},"title":"Demonstrating wait() and notify() in a simple producer-consumer problem&#8221;","author":"Sayed","date":"July 27, 2025","format":false,"excerpt":"Check on the methods on: https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/lang\/Object.html Understanding wait(), notify(), and notifyAll() in Java In Java and Java EE, the methods wait(), notify(), and notifyAll() are defined in the java.lang.Object class. They are not part of classes like Thread or interfaces such as Runnable. How They Work: These methods are part\u2026","rel":"","context":"In &quot;Anything JAVA&quot;","block_context":{"text":"Anything JAVA","link":"http:\/\/bangla.sitestree.com\/?cat=1975"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":68347,"url":"http:\/\/bangla.sitestree.com\/?p=68347","url_meta":{"origin":78391,"position":5},"title":"Resources Recently Checked on AngularJS and Java EE #AngularJS #By Sayed Ahmed #Java SE &#8211; Java EE #Misc. Reading","author":"Author-Check- Article-or-Video","date":"August 1, 2021","format":false,"excerpt":"Resources on AngularJS and Java EE, Sure, I did check them... http:\/\/www.journaldev.com\/3633\/hibernate-interview-questions-and-answers http:\/\/www.journaldev.com\/3626\/hibernate-validator-jsr303-example-tutorial https:\/\/scotch.io\/bar-talk\/s-o-l-i-d-the-first-five-principles-of-object-oriented-design http:\/\/stackoverflow.com\/questions\/49002\/prefer-composition-over-inheritance http:\/\/stackoverflow.com\/questions\/3058\/what-is-inversion-of-control http:\/\/stackoverflow.com\/questions\/242177\/what-is-aspect-oriented-programming https:\/\/angular.io\/docs\/ts\/latest\/cookbook\/a1-a2-quick-reference.html https:\/\/docs.oracle.com\/javase\/tutorial\/java\/IandI\/abstract.html http:\/\/www.corej2eepatterns.com\/images\/CJP2Catalog.gif Aspect Oriented Programming: http:\/\/docs.spring.io\/spring\/docs\/current\/spring-framework-reference\/html\/aop.html http:\/\/www.journaldev.com\/2394\/java-dependency-injection-design-pattern-example-tutorial http:\/\/www.journaldev.com\/2583\/spring-aop-example-tutorial-aspect-advice-pointcut-joinpoint-annotations Angular: https:\/\/angular.io\/docs\/ts\/latest\/cookbook\/a1-a2-quick-reference.html http:\/\/career.guru99.com\/top-25-angular-js-interview-questions\/ https:\/\/www.toptal.com\/angular-js\/interview-questions http:\/\/www.tutorialspoint.com\/angularjs\/angularjs_interview_questions.htm https:\/\/netbeans.org\/downloads\/ http:\/\/draptik.github.io\/blog\/2013\/07\/13\/angularjs-example-using-a-java-restful-web-service\/ https:\/\/www.toptal.com\/java\/building-modern-web-applications-with-angularjs-and-play-framework https:\/\/www.youtube.com\/watch?v=2B3qL7XtKnE http:\/\/www.ibm.com\/developerworks\/websphere\/library\/techarticles\/1602_woolf-trs\/1602_woolf2.html Java Versions: https:\/\/en.wikipedia.org\/wiki\/Java_EE_version_history Angular and Java https:\/\/www.youtube.com\/watch?v=2B3qL7XtKnE http:\/\/iloveoracle.com\/consulting-book-review-the-nomadic-developer-surviving-and-thriving-in-the-world-of-technology-consulting\/ https:\/\/www.toptal.com\/nodejs\/interview-questions https:\/\/gun.io\/blog\/tutorial-deploy-node-js-server-with-example\/ https:\/\/confluence.atlassian.com\/doc\/integrating-jira-and-confluence-2825.html https:\/\/en.wikipedia.org\/wiki\/Confluence_(software) From: http:\/\/sitestree.com\/?p=3826\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78391"}],"version-history":[{"count":1,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78391\/revisions"}],"predecessor-version":[{"id":78392,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=\/wp\/v2\/posts\/78391\/revisions\/78392"}],"wp:attachment":[{"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78391"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bangla.sitestree.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}