{"id":25483,"date":"2024-01-29T09:48:00","date_gmt":"2024-01-29T08:48:00","guid":{"rendered":"https:\/\/www.codemotion.com\/magazine\/?p=25483"},"modified":"2024-01-25T12:49:27","modified_gmt":"2024-01-25T11:49:27","slug":"ottimizzare-il-codice-java-soluzioni-pratiche-per-evitare-gli-smell-patterns","status":"publish","type":"post","link":"https:\/\/www.codemotion.com\/magazine\/it\/backend-it\/architettura-del-software\/ottimizzare-il-codice-java-soluzioni-pratiche-per-evitare-gli-smell-patterns\/","title":{"rendered":"Ottimizzare il Codice Java: Soluzioni Pratiche per Evitare Gli &#8220;Smell Patterns&#8221;"},"content":{"rendered":"\n<p><strong>Oltre gli Smell Patterns: Guida Pratica per un Codice Java Pulito e Sostenibile<\/strong><\/p>\n\n\n\n<p>Il codice di scarsa qualit\u00e0 \u00e8 come un sottobosco inesploso: oscuro, difficile da navigare e pieno di insidie. Gli &#8220;smell patterns&#8221; rappresentano i segnali di allarme che indicano potenziali problemi nel design del codice. In questo articolo, esploreremo soluzioni concrete per affrontare e prevenire questi &#8220;smell patterns&#8221; nel contesto del linguaggio Java. Scopriremo come rendere il nostro codice pi\u00f9 robusto, manutenibile e comprensibile.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-smell-patterns-un-breve-riepilogo\">Smell Patterns: Un Breve Riepilogo<\/h2>\n\n\n\n<p>Prima di immergerci nelle soluzioni, diamo un&#8217;occhiata ai principali &#8220;smell patterns&#8221; menzionati nel testo:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Rigidit\u00e0:<\/strong> Il software \u00e8 difficile da modificare, causando una cascata di modifiche in altri moduli dipendenti.<\/li>\n\n\n\n<li><strong>Fragilit\u00e0:<\/strong> Modificare il software genera rotture in molti punti.<\/li>\n\n\n\n<li><strong>Immobilit\u00e0:<\/strong> Il codice \u00e8 difficile da riutilizzare in altri progetti o parti dello stesso progetto.<\/li>\n\n\n\n<li><strong>Viscosit\u00e0:<\/strong> Aggiungere hack \u00e8 pi\u00f9 facile che seguire il design del programma.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-soluzioni-concrete-in-java\">Soluzioni Concrete in Java<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">1. Affrontare la Rigidit\u00e0 con Design Flessibile<\/h4>\n\n\n\n<p>Per mitigare la rigidit\u00e0, adottiamo un design flessibile. Utilizziamo l&#8217;Inversion of Control (IoC) e la Dependency Injection (DI) per rendere il codice meno dipendente dalle implementazioni specifiche.<br>Qui sotto due blocchi di codice: il primo con un esempio di bad code, il secondo con una soluzione a una classe rigida:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">RigidClass<\/span> <\/span>{\n    <span class=\"hljs-keyword\">private<\/span> Dependency dependency;\n\n    <span class=\"hljs-keyword\">public<\/span> RigidClass() {\n        this.dependency = <span class=\"hljs-keyword\">new<\/span> ConcreteDependency();\n    }\n\n    <span class=\"hljs-comment\">\/\/ ... altri metodi che utilizzano 'dependency' ...<\/span>\n}<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">FlexibleClass<\/span> <\/span>{\n    <span class=\"hljs-keyword\">private<\/span> Dependency dependency;\n\n    <span class=\"hljs-keyword\">public<\/span> FlexibleClass(Dependency dependency) {\n        this.dependency = dependency;\n    }\n\n    <span class=\"hljs-comment\">\/\/ ... altri metodi che utilizzano 'dependency' ...<\/span>\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\">2. Contrastare la Fragilit\u00e0 con Test Unitari<\/h4>\n\n\n\n<p>Per affrontare la fragilit\u00e0, sviluppiamo una solida suite di test unitari. I test aiutano a individuare rapidamente rotture nel codice e forniscono una verifica continua durante lo sviluppo. Per contrastare la fragilit\u00e0, si pu\u00f2 ragionare sul codice in maniera tale da costruire ogni componente per gestire una singola responsabilit\u00e0, usando in maniera consapevole l&#8217;ereditariet\u00e0 senza esagerare e implementando soluzioni sviluppando interfacce chiare. Qui di seguito un esempio di sviluppo con interfaccia e implementazione:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\"><span class=\"hljs-class\"><span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">ServizioCompleto<\/span> <\/span>{\n    void elaboraDati();\n    void inviaNotifiche();\n}\n\n<span class=\"hljs-comment\">\/\/ Interfacce separate con responsabilit\u00e0 distinte<\/span>\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">ElaboratoreDati<\/span> <\/span>{\n    void elaboraDati();\n}\n\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">Notifiche<\/span> <\/span>{\n    void inviaNotifiche();\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\">3. Superare l&#8217;Immobilit\u00e0 con Progettazione Modulare<\/h4>\n\n\n\n<p>Per superare l&#8217;immobilit\u00e0, adottiamo una progettazione modulare. Crea librerie e moduli indipendenti che possono essere facilmente riutilizzati in diversi progetti. Un altro modo per superare l&#8217;immobilit\u00e0 del codice \u00e8 applicare design pattern che promuovono la flessibilit\u00e0 e la riutilizzabilit\u00e0 del codice. Ad esempio, il pattern Strategy consente di definire una famiglia di algoritmi, incapsularli e renderli intercambiabili. Qui di seguito un esempio di strategy pattern:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title\">AlgoritmoOrdinamento<\/span> <\/span>{\n    void ordina(int&#91;] <span class=\"hljs-keyword\">array<\/span>);\n}\n\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Ordinatore<\/span> <\/span>{\n    AlgoritmoOrdinamento algoritmo;\n\n    void setAlgoritmo(AlgoritmoOrdinamento algoritmo) {\n        this.algoritmo = algoritmo;\n    }\n\n    void ordina(int&#91;] <span class=\"hljs-keyword\">array<\/span>) {\n        algoritmo.ordina(<span class=\"hljs-keyword\">array<\/span>);\n    }\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\">4. Ridurre la Viscosit\u00e0 con Design Semplice<\/h4>\n\n\n\n<p>Per ridurre la viscosit\u00e0, adottiamo un design semplice e evitiamo l&#8217;aggiunta di hack. Manteniamo il codice pulito e rispettiamo i principi di progettazione. Un modo \u00e8 utilizzare le eccezioni in modo accurato ed evitare l&#8217;eccessivo uso di eccezioni verificabili. Le eccezioni dovrebbero essere riservate a situazioni eccezionali e non utilizzate come parte del flusso di controllo normale. L&#8217;eccessivo uso di eccezioni pu\u00f2 rendere il codice pi\u00f9 difficile da seguire e aumentare la viscosit\u00e0. <br>Vediamo un esempio di buona gestione delle eccezioni:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">\n<span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">GestoreFile<\/span> <\/span>{\n    <span class=\"hljs-built_in\">String<\/span> leggiContenutoFile(<span class=\"hljs-built_in\">String<\/span> nomeFile) {\n        <span class=\"hljs-keyword\">try<\/span> {\n            <span class=\"hljs-comment\">\/\/ Codice per leggere il contenuto del file<\/span>\n            <span class=\"hljs-keyword\">return<\/span> contenutoFile;\n        } <span class=\"hljs-keyword\">catch<\/span> (FileNotFoundException e) {\n            <span class=\"hljs-comment\">\/\/ Gestione specifica per file non trovato<\/span>\n            logger.log(<span class=\"hljs-string\">\"File non trovato: \"<\/span> + nomeFile);\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\n            <span class=\"hljs-comment\">\/\/ Gestione generale per altre eccezioni di I\/O<\/span>\n            logger.log(<span class=\"hljs-string\">\"Errore di I\/O durante la lettura del file.\"<\/span>);\n        }\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">null<\/span>;\n    }\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-codice-pulito-sviluppo-aggiornato\">Codice pulito, sviluppo aggiornato.<\/h2>\n\n\n\n<p>In conclusione, la scrittura di codice di alta qualit\u00e0 \u00e8 fondamentale per evitare gli &#8220;smell patterns&#8221; e garantire una crescita sostenibile del software. Adottando design flessibili, test robusti, modularit\u00e0 e design semplice, possiamo creare un ambiente di sviluppo pi\u00f9 pulito, efficace e comprensibile. La strada per un codice eccezionale inizia con piccoli passi verso una programmazione pi\u00f9 consapevole.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Oltre gli Smell Patterns: Guida Pratica per un Codice Java Pulito e Sostenibile Il codice di scarsa qualit\u00e0 \u00e8 come un sottobosco inesploso: oscuro, difficile da navigare e pieno di insidie. Gli &#8220;smell patterns&#8221; rappresentano i segnali di allarme che indicano potenziali problemi nel design del codice. In questo articolo, esploreremo soluzioni concrete per affrontare&#8230; <a class=\"more-link\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/backend-it\/architettura-del-software\/ottimizzare-il-codice-java-soluzioni-pratiche-per-evitare-gli-smell-patterns\/\">Read more<\/a><\/p>\n","protected":false},"author":218,"featured_media":19983,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}","_uag_custom_page_level_css":"","_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[10269],"tags":[11706],"collections":[11708],"class_list":{"0":"post-25483","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-architettura-del-software","8":"tag-java-it","9":"collections-dalla-community","10":"entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v26.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Ottimizzare codice Java: soluzioni pratiche<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/backend-it\/architettura-del-software\/ottimizzare-il-codice-java-soluzioni-pratiche-per-evitare-gli-smell-patterns\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ottimizzare il Codice Java: Soluzioni Pratiche per Evitare Gli &quot;Smell Patterns&quot;\" \/>\n<meta property=\"og:description\" content=\"Oltre gli Smell Patterns: Guida Pratica per un Codice Java Pulito e Sostenibile Il codice di scarsa qualit\u00e0 \u00e8 come un sottobosco inesploso: oscuro, difficile da navigare e pieno di insidie. Gli &#8220;smell patterns&#8221; rappresentano i segnali di allarme che indicano potenziali problemi nel design del codice. 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