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J2EE Design Pattern - Dispatcher viewing and maintenance for the desktop

I am trying to understand the J2EE design pattern - "Dispatcher View" and "Service to Worker". What is the main idea of ​​these two approaches and how to use these templates in our application. Can you explain these two patterns with an example?

Thank you for your help.

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The difference, apparently, is that the Front Controller calls "Service for Worker" or "Supervisory View", the processing performed before the call is either light or control processing at http://www.corej2eepatterns.com/CJP2Poster.pdf

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The following is an Apress Book inscription that helps you learn more about Dispatcher View and Desktop Tools: “Pro Java ™ EE Spring Templates Best Practices and Design Strategies. Deploying Java ™ EE Templates Using the Spring Framework”

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