[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-347581-105":59,"doc-detail-347581-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","layered-architecture-key-concepts-separation-of-concerns-and-considerations","LAYERED ARCHITECTURE - Key Concepts, Separation of Concerns, and Considerations","","Software architecture patterns are introduced as a way to address applications that lack formal structure and become tightly coupled, brittle, and hard to evolve. The layered architecture pattern is presented as the most common approach, typically implemented with presentation, business, persistence, and database layers. It emphasizes layer isolation, clear responsibilities, well-defined interfaces, and effective access paths between layers, while discussing risks such as the sinkhole anti-pattern and impacts on monolithic deployment, robustness, and reliability.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/layered-architecture-key-concepts-separation-of-concerns-and-considerations/347581/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/layered-architecture-key-concepts-separation-of-concerns-and-considerations/347581.png","ImageObject",300,407,{"name":92,"@type":93},"Alex Sinclair","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-10","2026-09-22",true,{"@type":102,"interactionType":103,"userInteractionCount":44},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why are software architecture patterns needed?","Question",{"text":112,"@type":113},"Without formal architecture, applications tend to be coupled and brittle, becoming difficult to change. Patterns help manage scalability, response to changes, and deployment characteristics.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What are the main layers in the common layered architecture implementation?",{"text":117,"@type":113},"A typical implementation uses four layers: presentation, business, persistence, and database.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the “architecture sinkhole” anti-pattern risk in layered architecture?",{"text":121,"@type":113},"Requests may flow through many layers as simple passthrough, creating limited granularity and potentially impacting deployment, robustness, and reliability.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},347581,1790499254,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":44,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":52,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},1099523882182,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","SOFTWARE ARCHITECTURE PATTERNS  \nINGEGNERIA DEL SOFTWARE  \nUniversità degli Studi di Padova  \nDipartimento di Matematica  \nCorso di Laurea in Informatica  \n[rcardin@math.unipd.it](rcardin@math.unipd.it)  \nINTRODUCTION  \n¢ Applications lacking a formal architecture are generally coupled, brittle, difficult to change  \n􀀡 Modules result in an unorganized collection  \n􀀡 Big ball of mud antipattern  \n􀀡 Deployment and maintenance problems  \n¢ Does the architecture scale? How does application response to changes? What are the deployment characteristics?  \n¢ Architecture patterns  \n􀀡 Helps to manage these aspects, knowing the characteristics, strengths and weakness  \nIngegneria del software Riccardo Cardin 3  \nSUMMARY  \n¢ Introduction  \n¢ Layered architecture  \n¢ Event-driven architecture  \n¢ Microservices architecture  \nIngegneria del software Riccardo Cardin  \nLAYERED ARCHITECTURE  \n2  \n¢ Most common architecture pattern  \n􀀡 N-tier architecture pattern  \n􀀡 Standard de facto for most JEE applications  \n¢ Widely known by most architects and developers  \n􀀡 Reflects the organizational structure found in most IT companies  \n¢ Components are organized into horizontal layers  \n􀀡 Each layer performs a single and specific role  \n¢ The most common implementation consists of four layers  \n¢ Presentation, business, persistence and database  \nIngegneria del software Riccardo Cardin 4  \nLAYERED ARCHITECTURE  \nIngegneria del software Riccardo Cardin  \n5  \nKEY CONCEPTS  \n¢ Layers should be closed (layer isolation)  \n􀀡 A request move from one layer to the layer right below it  \n􀀡 Changes made in one layer generally don’t impact or effect components in other layers.  \n¢ Layers can be open, too  \n􀀡 Imagine a service layer below the business layer that offers commong services.  \n¢ The business layer should go through the service layer to access the persistence layer.  \n¢ Making the service layer open resolve the problem  \n¢ Open layers should be very well documented  \nIngegneria del software Riccardo Cardin 7  \nSEPARATION OF CONCERNS  \n¢ Every layer forms an abstraction over a particular business request  \n􀀡 Components within a specific layer deal only with logic that pertains to that layer  \n¢ i.e. Presentation layer does not need to know how to get customer data  \n¢ Component classification makes easy to build effective roles and responsibility models  \n􀀡 Limited component scopes make easy to develop, test and govern , maintain such applications  \n¢ Well defined component interfaces  \nIngegneria del software Riccardo Cardin 6  \nIngegneria del software Riccardo Cardin  \n8  \nKEY CONCEPTS  \nIngegneria del software  \nRiccardo Cardin 9  \nCONSIDERATIONS  \n¢ A good starting point for most application  \n􀀡 It’s a solid general purpose pattern  \n¢ Architecture sinkhole anti-pattern  \n􀀡 Requests flow through multiple layers as simple passthrough  \n¢ 80-20 proportion of good paths wrt sinkhole path  \n¢ Open some layer (but be aware!)  \n¢ Tends to lend itself toward monolithic applications  \n¢ It could be an issue in terms of deployment, robustness and reliability  \nIngegneria del software Riccardo Cardin 11  \nEXAMPLE  \nExample  \nConsider a request from a business user to retrieve customer information for a particular individual  \nAccepts the requests, routes them to business layer and display information  \nAggregates all the information needed by the business request  \nExecutes SQL statements to retrieve the corresponding data and passes it back up  \nStore information in a persistent form  \nIngegneria del software Riccardo Cardin 10  \nPATTERN ANALYSIS  \nIngegneria del software Riccardo Cardin  \n12  \n\n| Characteristic | Rating | Description |\n| --- | --- | --- |\n| Overall agility | | Small changes can be properly isolated, big one are more difficult due to the monolithic nature of the pattern |\n| Ease of deployment | | Difficult for larger applications, due to monolithic deployments (that have to be properly scheduled |\n| Testability | | Very easy to mock or stub","cbCaitIOCIMo3pJG","https://ap.wps.com/l/cbCaitIOCIMo3pJG","pdf",5071549,"English","# Introduction\n## Layered architecture\n## Key concepts\n## Separation of concerns\n## Considerations\n## Example\n## Pattern analysis\n## Event-driven architecture","[{\"question\":\"Why are software architecture patterns needed?\",\"answer\":\"Without formal architecture, applications tend to be coupled and brittle, becoming difficult to change. Patterns help manage scalability, response to changes, and deployment characteristics.\"},{\"question\":\"What are the main layers in the common layered architecture implementation?\",\"answer\":\"A typical implementation uses four layers: presentation, business, persistence, and database.\"},{\"question\":\"What is the “architecture sinkhole” anti-pattern risk in layered architecture?\",\"answer\":\"Requests may flow through many layers as simple passthrough, creating limited granularity and potentially impacting deployment, robustness, and reliability.\"}]","LAYERED ARCHITECTURE - Key Concepts, Separation of Concerns, and Considerations | PDF",1790067839,25]