{"id":28238,"date":"2024-06-17T14:31:55","date_gmt":"2024-06-17T12:31:55","guid":{"rendered":"https:\/\/www.codemotion.com\/magazine\/?p=28238"},"modified":"2024-06-17T14:33:08","modified_gmt":"2024-06-17T12:33:08","slug":"linnovazione-del-modello-serverless-nel-cloud-computing","status":"publish","type":"post","link":"https:\/\/www.codemotion.com\/magazine\/it\/devops-it\/cloud-it\/linnovazione-del-modello-serverless-nel-cloud-computing\/","title":{"rendered":"L&#8217;Innovazione del modello serverless nel cloud computing"},"content":{"rendered":"\n<p>Negli ultimi anni, il concetto di &#8220;<strong>serverless<\/strong>&#8221; ha guadagnato notevole popolarit\u00e0 nel campo dello sviluppo software e dell&#8217;infrastruttura cloud. Contrariamente a quanto suggerisce il termine, <strong>il modello serverless non implica l&#8217;assenza di server<\/strong>, ma piuttosto che la gestione e il mantenimento dell&#8217;infrastruttura server sono completamente trasparenti agli sviluppatori e quindi il team di sviluppo non deve implementare l&#8217;infrastruttura, semmai potrebbe dover configurarla.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-la-differenza-con-il-modello-tradizionale\">La differenza con il modello tradizionale<\/h4>\n\n\n\n<p>Nel modello tradizionale di sviluppo, gli sviluppatori devono gestire un&#8217;applicazione insieme all&#8217;infrastruttura necessaria per eseguirla, <strong>inclusi server, reti, bilanciatori di carico e altri componenti, questo comporta una notevole complessit\u00e0 e richiede competenze specifiche per l&#8217;amministrazione dei sistemi<\/strong>. Al contrario, con l&#8217;approccio serverless, gli sviluppatori possono concentrarsi esclusivamente sulla logica dell&#8217;applicazione, delegando la gestione dell&#8217;infrastruttura al provider di servizi cloud.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-funzionamento-del-modello-serverless\">Funzionamento del modello serverless<\/h4>\n\n\n\n<p>Nel modello serverless, il provider di servizi cloud, come <strong>Amazon Web Services<\/strong> (AWS), <strong>Google Cloud Platform<\/strong> (GCP) o <strong>Microsoft Azure<\/strong>, si occupa di gestire le risorse server e i dettagli dell&#8217;infrastruttura. Gli sviluppatori<a href=\"https:\/\/www.codemotion.com\/magazine\/it\/microservizi\/7-strumenti-per-migliorare-la-scalabilita-dei-microservizi\/\" class=\"ek-link\"> creano funzioni o microservizi<\/a> che vengono eseguiti su richiesta. Questo significa che la scalabilit\u00e0, l&#8217;approvvigionamento delle risorse e l&#8217;ottimizzazione delle prestazioni sono gestiti automaticamente dal provider cloud, permettendo una scalabilit\u00e0 quasi infinita in risposta alla domanda degli utenti.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-vantaggi-del-modello-serverless\">Vantaggi del modello serverless<\/h4>\n\n\n\n<p>L&#8217;architettura serverless offre numerosi vantaggi, tra cui:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Riduzione dei costi operativi<\/strong>: Con il modello serverless, si paga solo per il tempo effettivo di esecuzione delle funzioni e non \u00e8 necessario mantenere server dedicati che potrebbero rimanere inattivi per lunghi periodi, riducendo cos\u00ec i costi.<\/li>\n\n\n\n<li><strong>Scalabilit\u00e0 automatica<\/strong>: L&#8217;infrastruttura cloud gestisce automaticamente la scalabilit\u00e0 in base alla domanda; le funzioni possono essere replicate e distribuite rapidamente ed efficientemente, consentendo di gestire carichi di lavoro variabili senza interventi manuali.<\/li>\n\n\n\n<li><strong>Flessibilit\u00e0 e semplicit\u00e0<\/strong>: Gli sviluppatori possono concentrarsi solo sulla logica dell&#8217;applicazione, senza preoccuparsi della gestione dell&#8217;infrastruttura sottostante e questo consente di ridurre i tempi di sviluppo e di distribuzione.<\/li>\n\n\n\n<li><strong>Maggiore produttivit\u00e0<\/strong>: La riduzione delle attivit\u00e0 amministrative permette agli sviluppatori di focalizzarsi sulle funzionalit\u00e0 dell&#8217;applicazione, aumentando la produttivit\u00e0 e accelerando il rilascio di nuove funzionalit\u00e0.<\/li>\n\n\n\n<li><strong>Riduzione della complessit\u00e0 operativa<\/strong>: Non \u00e8 necessario preoccuparsi dell&#8217;approvvigionamento delle risorse o della gestione dei server, riducendo cos\u00ec la complessit\u00e0 operativa e i potenziali errori.<\/li>\n\n\n\n<li><strong>Affidabilit\u00e0 elevata<\/strong>: I servizi serverless sono gestiti da provider cloud affidabili che garantiscono alta disponibilit\u00e0 e robustezza; inoltre l&#8217;esecuzione isolata delle funzioni aumenta l&#8217;affidabilit\u00e0 complessiva.<\/li>\n\n\n\n<li><strong>Tempi di risposta rapidi<\/strong>: La distribuzione automatica delle funzioni su server geograficamente distribuiti riduce la latenza e migliora l&#8217;esperienza dell&#8217;utente.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-esempi-di-codice-java-su-piattaforme-cloud-serverless\">Esempi di codice java su piattaforme cloud serverless<\/h4>\n\n\n\n<p>Per utilizzare le funzionalit\u00e0 serverless con il linguaggio Java, possiamo sfruttare i servizi offerti da piattaforme come AWS Lambda, Google Cloud Functions e Azure Functions. Ecco una guida su come scrivere e distribuire una semplice funzione Java utilizzando AWS Lambda.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"h-prerequisiti\">Prerequisiti<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Un account AWS<\/li>\n\n\n\n<li>AWS CLI configurato<\/li>\n\n\n\n<li>Maven installato<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\" id=\"h-step-1-creare-un-progetto-maven\">Step 1: creare un progetto maven<\/h5>\n\n\n\n<p>Creiamo un nuovo progetto Maven con una struttura di base.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">mvn archetype:generate -DgroupId=com.example -DartifactId=lambda-demo -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=<span class=\"hljs-literal\">false<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><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<h5 class=\"wp-block-heading\" id=\"h-step-2-scrivere-la-funzione-lambda\">Step 2: scrivere la funzione lambda<\/h5>\n\n\n\n<p>Modifichiamo il file <code>App.java<\/code> per implementare la nostra funzione Lambda.<\/p>\n\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\">package com.example;\n\nimport com.amazonaws.services.lambda.runtime.Context;\nimport com.amazonaws.services.lambda.runtime.RequestHandler;\n\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">App<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title\">RequestHandler<\/span>&lt;<span class=\"hljs-title\">RequestClass<\/span>, <span class=\"hljs-title\">ResponseClass<\/span>&gt; <\/span>{\n    <span class=\"hljs-keyword\">public<\/span> ResponseClass handleRequest(RequestClass request, Context context) {\n        String greeting = <span class=\"hljs-string\">\"Hello, \"<\/span> + request.getName();\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">new<\/span> ResponseClass(greeting);\n    }\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<h5 class=\"wp-block-heading\" id=\"h-step-3-definire-le-classi-di-request-e-response\">Step 3: definire le classi di Request e Response<\/h5>\n\n\n\n<p>Creiamo le classi <code>RequestClass<\/code> e <code>ResponseClass<\/code> per gestire i dati di input e output.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">package com.example;\n\npublic <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">RequestClass<\/span> <\/span>{\n    private <span class=\"hljs-built_in\">String<\/span> name;\n\n    public <span class=\"hljs-built_in\">String<\/span> getName() {\n        <span class=\"hljs-keyword\">return<\/span> name;\n    }\n\n    public <span class=\"hljs-keyword\">void<\/span> setName(<span class=\"hljs-built_in\">String<\/span> name) {\n        <span class=\"hljs-keyword\">this<\/span>.name = name;\n    }\n}\n\npackage com.example;\n\npublic <span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">ResponseClass<\/span> <\/span>{\n    private <span class=\"hljs-built_in\">String<\/span> message;\n\n    public ResponseClass(<span class=\"hljs-built_in\">String<\/span> message) {\n        <span class=\"hljs-keyword\">this<\/span>.message = message;\n    }\n\n    public <span class=\"hljs-built_in\">String<\/span> getMessage() {\n        <span class=\"hljs-keyword\">return<\/span> message;\n    }\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\">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<h5 class=\"wp-block-heading\" id=\"h-step-4-configurare-il-file-di-deployment\">Step 4: configurare il file di deployment<\/h5>\n\n\n\n<p>Modifichiamo il file <code>pom.xml<\/code> per includere le dipendenze necessarie per AWS Lambda.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>com.amazonaws<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>aws-lambda-java-core<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">version<\/span>&gt;<\/span>1.2.1<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">version<\/span>&gt;<\/span>\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h5 class=\"wp-block-heading\" id=\"h-step-5-creare-l-artifact\">Step 5: creare l&#8217;artifact<\/h5>\n\n\n\n<p>Compiliamo il progetto e creiamo l&#8217;artifact che sar\u00e0 caricato su AWS Lambda.<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">mvn package<\/code><\/span><\/pre>\n\n\n<h5 class=\"wp-block-heading\" id=\"h-step-6-caricare-la-funzione-su-aws-lambda\">Step 6: caricare la funzione su aws lambda<\/h5>\n\n\n\n<p>Utilizziamo AWS CLI per caricare la funzione Lambda.<\/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\">aws lambda create-<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span> --<span class=\"hljs-title\">function<\/span>-<span class=\"hljs-title\">name<\/span> <span class=\"hljs-title\">HelloWorldFunction<\/span> --<span class=\"hljs-title\">zip<\/span>-<span class=\"hljs-title\">file<\/span> <span class=\"hljs-title\">fileb<\/span>:\/\/<span class=\"hljs-title\">target<\/span>\/<span class=\"hljs-title\">lambda<\/span>-<span class=\"hljs-title\">demo<\/span>-1.0-<span class=\"hljs-title\">SNAPSHOT<\/span>.<span class=\"hljs-title\">jar<\/span> --<span class=\"hljs-title\">handler<\/span> <span class=\"hljs-title\">com<\/span>.<span class=\"hljs-title\">example<\/span>.<span class=\"hljs-title\">App<\/span>::<span class=\"hljs-title\">handleRequest<\/span> --<span class=\"hljs-title\">runtime<\/span> <span class=\"hljs-title\">java11<\/span> --<span class=\"hljs-title\">role<\/span> <span class=\"hljs-title\">arn<\/span>:<span class=\"hljs-title\">aws<\/span>:<span class=\"hljs-title\">iam<\/span>::123456789012:<span class=\"hljs-title\">role<\/span>\/<span class=\"hljs-title\">lambda<\/span>-<span class=\"hljs-title\">execution<\/span>-<span class=\"hljs-title\">role<\/span><\/span><\/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<h5 class=\"wp-block-heading\" id=\"h-step-7-testare-la-funzione\">Step 7: testare la funzione<\/h5>\n\n\n\n<p>Possiamo testare la funzione direttamente dalla console AWS o utilizzando AWS CLI.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">aws lambda invoke --<span class=\"hljs-function\"><span class=\"hljs-keyword\">function<\/span>-<span class=\"hljs-title\">name<\/span> <span class=\"hljs-title\">HelloWorldFunction<\/span> --<span class=\"hljs-title\">payload<\/span> '<\/span>{<span class=\"hljs-string\">\"name\"<\/span>: <span class=\"hljs-string\">\"World\"<\/span>}<span class=\"hljs-string\">' response.json<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><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<p>Il file <code>response.json<\/code> conterr\u00e0 l&#8217;output della funzione.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-limiti-del-modello-serverless\">Limiti del modello serverless<\/h4>\n\n\n\n<p>Nonostante i numerosi vantaggi, il modello serverless potrebbe non essere adatto a tutte le applicazioni: carichi di lavoro che richiedono elaborazioni costanti o di lunga durata potrebbero non beneficiare del modello serverless e potrebbero necessitare di un&#8217;infrastruttura tradizionale per un controllo pi\u00f9 granulare e per costi potenzialmente inferiori. \u00c8 cruciale valutare attentamente le esigenze specifiche dell&#8217;applicazione prima di adottare un&#8217;architettura serverless.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-conclusioni\">Conclusioni<\/h4>\n\n\n\n<p>L&#8217;adozione di nuove forme di sviluppo, come il modello serverless, rappresenta un&#8217;opportunit\u00e0 significativa per migliorare l&#8217;efficienza e la scalabilit\u00e0 delle applicazioni. Tuttavia, \u00e8 fondamentale comprendere che ogni esigenza ha il suo strumento dedicato e non bisogna adottare tecnologie solo perch\u00e9 vanno di moda, ma la scelta va fatta sulla base di motivazioni tecniche e di progetto per quanto possibile. <br>Imparare a valutare e selezionare gli strumenti pi\u00f9 appropriati per ogni situazione \u00e8 una competenza essenziale per sviluppatori e architetti del software, garantendo cos\u00ec soluzioni ottimali e sostenibili nel tempo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Negli ultimi anni, il concetto di &#8220;serverless&#8221; ha guadagnato notevole popolarit\u00e0 nel campo dello sviluppo software e dell&#8217;infrastruttura cloud. Contrariamente a quanto suggerisce il termine, il modello serverless non implica l&#8217;assenza di server, ma piuttosto che la gestione e il mantenimento dell&#8217;infrastruttura server sono completamente trasparenti agli sviluppatori e quindi il team di sviluppo non&#8230; <a class=\"more-link\" href=\"https:\/\/www.codemotion.com\/magazine\/it\/devops-it\/cloud-it\/linnovazione-del-modello-serverless-nel-cloud-computing\/\">Read more<\/a><\/p>\n","protected":false},"author":218,"featured_media":7800,"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":[10291],"tags":[12253],"collections":[12256,11708,12259],"class_list":{"0":"post-28238","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-cloud-it","8":"tag-serverless-it","9":"collections-cloud-computing-it","10":"collections-dalla-community","11":"collections-serverless-it","12":"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>L&#039;Innovazione del modello serverless nel cloud computing - Codemotion Magazine<\/title>\n<meta name=\"description\" content=\"Cosa significa veramente &#039;modello serverless&#039;? Leggi l&#039;articolo per scoprire perch\u00e9 &#039;serverless&#039; non vuol dire che non ci sia un server.\" \/>\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\/devops-it\/cloud-it\/linnovazione-del-modello-serverless-nel-cloud-computing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L&#039;Innovazione del modello serverless nel cloud computing\" \/>\n<meta property=\"og:description\" content=\"Cosa significa veramente &#039;modello serverless&#039;? 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