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Design Best practices using Factory Method Pattern

In the previous Design Pattern example we have explained about a flavor of Factory pattern which is commonly used nowadays. In this session we will understand a more advanced solution ...
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Testing Quartz Cron expressions

Declaring complex Cron expressions is still giving me some headaches, especially when some more advanced constructs are used. After all, can you tell when the following trigger will ...
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Abstract Factory Design Pattern Explained

Abstract Factory Design Pattern is another flavor of Factory Design Pattern. This pattern can be considered as a “super factory” or “Factory of factories”. The Abstract Factory ...
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JavaOne 2012 Coverage

JavaOne, the annual Java extravaganza conference, took place from 30 September to 4 October in San Francisco. Numerous interesting presentations took place, proving once again a healthy ...
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Transition to Agile, Large Technical Debt, Small Project

Many months ago, Rebecca asked an interesting question about technical debt in projects. She asked, How to start when there’s a really big mess? In that case, small, just being a ...
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You can’t Refactor your way out of every Problem

Refactoring is a disciplined way to clarify, retain or restore the design of a system as you make changes, and to help cleanup and correct the mistakes and mess that we all make as ...
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JavaEE Revisits Design Patterns: Decorator

This time last year I wrote a series of blog posts on JavaEE implementation of design patterns. Roughly after a year, I realized I missed my favorite pattern, the decorator. Decorator ...
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Android – Select multiple photos from Gallery

Today i am going to discuss about implementation of selecting multiple photos from Photo Gallery. You know, i have searched enough to find out a solution for selecting multiple images ...
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Logging Hibernate SQL

There are two well-known ways to log Hibernate SQL in Grails; one is to add logSql = true in DataSource.groovy (either in the top-level block for all environments or per-environment)             dataSource ...
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Introduction to PostgreSQL PL/java

Modern databases allow stored procedures to be written in a variety of languages. One commonly implemented language is java.N.B., this article discusses the PostgreSQL-specific java ...
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