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Mediator Design Pattern in Java – Example Tutorial

Mediator Pattern is one of the behavioral design pattern, so it deals with the behaviors of objects. Mediator design pattern is used to provide a centralized communication medium between ...
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Memento Design Pattern in Java – Example Tutorial

Memento pattern is one of the behavioral design pattern. Memento design pattern is used when we want to save the state of an object so that we can restore later on. Memento pattern ...
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Asynchronous retry pattern

When you have a piece of code that often fails and must be retried, this Java 7/8 library provides rich and unobtrusive API with fast and scalable solution to this problem:                   ScheduledExecutorService ...
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Observer Design Pattern in Java – Example Tutorial

Observer pattern is one of the behavioral design pattern. Observer design pattern is useful when you are interested in the state of an object and want to get notified whenever there ...
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Custom Deserializer in Jackson and validation

tl;dr: it is important to add input validation to custom json deserializers in Jackson. In RHQ we make use of Json parsing in a few places – be it directly in the as7/Wildfly ...
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Iterator Design Pattern in Java – Example Tutorial

Iterator pattern in one of the behavioral pattern and it’s used to provide a standard way to traverse through a group of Objects. Iterator pattern is widely used in Java Collection ...
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Java Exception Handling Tutorial with Examples and Best Practices

Exception is an error event that can happen during the execution of a program and disrupts its normal flow. Java provides a robust and object oriented way to handle exception scenarios, ...
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Java Generics Tutorial – Example Class, Interface, Methods, Wildcards and much more

Generics is one of the core feature of Java programming and it was introduced in Java 5. If you have been working on Java Collections and with version 5 or higher, I am sure that you ...
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How to create Thread Pools using Java 5 Executor Framework

Java 5 introduced Thread pool in Java in form of Executor framework, which allows Java programmer to decouple submission of task to execution of task. If you are doing server side programming ...
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EclipseLink MOXy and the Java API for JSON Processing – Object Model APIs

The Java API for JSON Processing (JSR-353) is the Java standard for producing and consuming JSON which was introduced as part of Java EE 7.  JSR-353 includes object (DOM like) and ...
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