<p>The <strong>Core J2EE patterns</strong> deal with testing on the presentation tier as offered by Sun Java Center. J2EE stands for Java 2 Enterprise Edition currently known as Java Enterprise Edition (J EE). It consists of many APIs that provide software developers with the capabilities to write server-side code. These design patterns are specifically concerned with the following listed layers.</p>
<ul>
<li>Presentation Layer</li>
<li>Business Layer</li>
<li>Integration Layer</li>
</ul>
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<h2 dir="ltr">Spring 5 Design Pattern Book</h2>
<div dir="ltr" style="color: #20124d; font-family: 'calibri' , sans-serif; font-size: 13pt; text-align: justify;">You could purchase my <strong>Spring 5 book</strong> that is with title name &#8220;<strong>Spring 5 Design Patterns</strong>&#8220;. This book is available on the <a href="https://www.amazon.in/Spring-Design-Patterns-Dinesh-Rajput/dp/1788299450/ref=sr_1_1?ie=UTF8&;qid=1507925340&;sr=8-1&;keywords=spring+5+design+pattern"><strong>Amazon</strong></a> and <a href="https://www.packtpub.com/application-development/spring-5-design-patterns"><strong>Packt</strong></a> publisher website. Learn various <strong>design patterns</strong> and <strong>best practices</strong> in Spring 5 and use them to solve common design problems. You could use author discount to purchase this book by using code- &#8220;<strong>AUTHDIS40</strong>&#8220;.</div>
<div dir="ltr"></div>
<div dir="ltr"><a href="https://www.amazon.in/Spring-Design-Patterns-Dinesh-Rajput/dp/1788299450/ref=sr_1_1?s=books&;ie=UTF8&;qid=1512607966&;sr=1-1&;keywords=dinesh+rajput"><br />
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<p><img class="aligncenter size-full wp-image-3647" src="https://dineshonjava.com/wp-content/uploads/2012/03/CoreJ2EEPatternCatalog.jpg" alt="Core J2EE Pattern Catalog" width="772" height="543" /></p>
<h3>Presentation Tier</h3>
<ul>
<li><a href="https://dineshonjava.com/intercepting-filter-design-pattern/"><strong>Intercepting Filter</strong></a><br />
It is used to provide interception and manipulation of requests as well as response prior to and preceding the processing of the request. <a href="https://dineshonjava.com/intercepting-filter-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/context-object-design-pattern/"><strong>Context Object</strong></a><br />
Context Object is present to keep from using system information that is specific to the protocol and doesn’t coincide with its context. <a href="https://dineshonjava.com/context-object-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/front-controller-design-pattern/"><strong>Front Controller</strong></a><br />
A centralized access point allows for non-duplication of the control logic needed to handle a request. Front Controller is to handle such request by acting as an initial point. <a href="https://dineshonjava.com/front-controller-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/application-controller-design-pattern/"><strong>Application Controller</strong></a><br />
It provides support for action reuse and code to view-management. The code is made more readable and maintainable as well as modular. Request handling is also improved and made more extensible. <a href="https://dineshonjava.com/application-controller-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/view-helper-design-pattern/"><strong>View Helper</strong></a><br />
It is used to provide a different view, hiding the logic present in the code. Now the logic and the view are completely independent to provide ease for developers and designers. <a href="https://dineshonjava.com/view-helper-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/composite-view-design-pattern/"><strong>Composite View</strong></a><br />
Small sub views can be created using the composite view. These sub views can be integrated to create a singular view. <a href="https://dineshonjava.com/composite-view-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/dispatcher-view-design-pattern/"><strong>Dispatcher View</strong></a><br />
To be able to support a small amount of multitasking, dispatcher view is used. It provides handling and response generation for requests while a business processing is taking place. <a href="https://dineshonjava.com/dispatcher-view-design-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/service-to-worker/"><strong>Service to Worker</strong></a><br />
It is used to perform handling of requests as well as processing of the business transaction and after that, the control is transferred to the View. <a href="https://dineshonjava.com/service-to-worker/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
</ul>
<h3>Business Tier</h3>
<ul>
<li><a href="https://dineshonjava.com/business-delegate/"><strong>Business Delegate</strong></a><br />
The business delegate pattern is one of the Java EE design patterns. It is used in order to decouple or reduce the coupling between the presentation tier and business services. <a href="https://dineshonjava.com/business-delegate/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/service-locator/"><strong>Service Locator</strong></a><br />
The design pattern, service locator is an important part in software development. Looking up for a service is one of the core features of service locator. A robust abstraction layer performs this function. The design pattern uses a central registry called Service Locator. <a href="https://dineshonjava.com/service-locator/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/session-facade/"><strong>Session Facade</strong></a><br />
The session façade pattern&#8217;s core application is development of enterprise apps. You can also call it a logical extension of GoF designs. The pattern encases the interactions which are happening between the low-level components, which is Entity EJB. <a href="https://dineshonjava.com/session-facade/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/business-object/"><strong>Business Object</strong></a><br />
Object-oriented programming makes use of the business object. It represents the parts of a business. A business object is able to represent things like event, person, business process, place, and concept. The business object can exist in certain forms like a product, an invoice, and the details of a particular part of a transaction. <a href="https://dineshonjava.com/business-object/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/composite-entity-pattern/"><strong>Composite Entity</strong></a><br />
It is one if the Java EE software-design patterns. The composite entity pattern performs modeling, managing and representing a set of interrelated persistent objects. It does not represent them as separate fine-grained entity beans. Composite entity beans are able to represent a graph of objects. <a href="https://dineshonjava.com/composite-entity-pattern/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/transfer-object/"><strong>Transfer Object</strong></a><br />
It is one of the Java EE design patterns. We need transfer object when we need to pass the data across various attributes in a packet to the server. Value Object is another name for transfer object. The transfer object is just a class of POJO which has a method of the getter and setter. <a href="https://dineshonjava.com/transfer-object/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
</ul>
<h3>Integration Tier</h3>
<ul>
<li><a href="https://dineshonjava.com/data-access-object/"><strong>Data Access Object</strong></a><br />
The data access object in a computer software which is as an object which is responsible for providing abstract interface for communication to a specific form of database. <a href="https://dineshonjava.com/data-access-object/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/service-activator/"><strong>Service Activator</strong></a><br />
The service activator design pattern is one of the Java EE patterns. It is an SI (spring integration) component. It is responsible for triggering or activating a service object or bean which is managed by the spring. A service activator searches through the message channel in order to look for messages. <a href="https://dineshonjava.com/service-activator/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
<li><a href="https://dineshonjava.com/web-service-broker/"><strong>Web Service Broker</strong></a><br />
The web service broker uses web protocols and XML. We can use this pattern to expose and broker the services. Assume a circumstance, where multiple organizations are lined up in order to request info from a number of service providers. <a href="https://dineshonjava.com/web-service-broker/"> <img class="wp-image-4083" src="https://dineshonjava.com/wp-content/uploads/2018/01/readmore-1.png" alt="readmore" width="117" height="17" /></a></li>
</ul>
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