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AppDev in the Cloud with Financial Customer Evaluation Solution

The oldest business logic demo in modern JBoss BRMS times is the Customer Evaluation example launched back in June 2012. Back then, JBoss BRMS included rules, events and processes. The project provides a fully installed and configured environment for showcasing the project and all the available BPM components. It  includes a JBoss Developer Studio project complete with unit tests. Since then ...

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Intro to Redis with Spring Boot

1. Overview In this article, we will review the basics of how to use Redis with Spring Boot through the Spring Data Redis library. We will build an application that demonstrates how to perform CRUD operations Redis through a web interface. The full source code for this project is available on Github. 2. What is Redis? Redis is an open ...

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Functional Java by Example | Part 2 – Tell a Story

This is part 2 of the series called “Functional Java by Example”. The example I’m evolving in each part of the series is some kind of “feed handler” which processes documents. In previous part I started with some original code and applied some refactorings to describe “what” instead of “how”. In order to help the code going forward, we need ...

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Too Many PreparedStatement Placeholders in Oracle JDBC

java-interview-questions-answers

There are multiple causes of the ORA-01745 (“invalid host/bind variable name error”) error when using an Oracle database. The Oracle 9i documentation on errors ORA-01500 through ORA-02098 provides more details regarding ORA-01745. It states that the “Cause” is “A colon in a bind variable or INTO specification was followed by an inappropriate name, perhaps a reserved word.” It also states ...

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The Problem Solver

I’ll start this post with a quote:                     "Every great developer you know got there by solving problems they were unqualified to solve until they actually did it." – Patrick McKenzie — The Practical Dev (@ThePracticalDev) February 14, 2017 Good developers are good problem solvers. They turn each task into a ...

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A Tale of Two Iterators

When you look at the most popular Java interview questions, you might encounter the one about fail-fast and fail-safe iterators: What’s the difference between fail-fast and fail-safe iterators? The simplified answer is that: Fail-fast iterator throws ConcurrentModificationException if the collection is modified while iterating, but fail-safe doesn’t. Even though it totally makes sense, it’s not clear what the interviewer means ...

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10 Courses (83.5 Hours) to Become a Java Master: Design UIs with JavaFX, Utilize Design Patterns, Master Multithreading & More Hey fellow geeks, This week, on our JCG Deals store, we have another extreme offer. We are offering a massive 94% off on Complete Java Programming Bootcamp. Get it now with only $39, instead of the original price of $740. ...

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