Language Resources

Using Apache POI to Convert Excel to an Elasticsearch Compatible JSON

Let's see what happens when you upload data into an Elasticsearch index and learn why Logstash was not the answer.

December 29, 2016

by Bipin Patwardhan

· 8,061 Views · 1 Like

Single vs. Multiple Filters in the Java Stream API

It might be tempting to run multiple filters in your streams, but be careful—it might come with a cost. Use your filters judiciously.

December 29, 2016

by A N M Bazlur Rahman

CORE

· 114,393 Views · 6 Likes

Persisting ZipKin SpanStore: MySQL and Cassandra

The ZipKin distributed tracing system is great for testing latency issues, but by default, it doesn't persist the traces. Fortunately, you can fix that with Cassandra and MySQL.

December 28, 2016

by Nitin Ware

· 13,972 Views · 2 Likes

Working With Oracle JET UI Web Components

Learn the basics for working with Oracle JET UI web components with help from the JET Cookbook.

December 28, 2016

by Chris Muir

· 26,223 Views · 9 Likes

Send, read Emails and Appointments From MS Exchange [using Java]

This code will help you connect your app to MS Exchange using the EWS Java API. In its current form, the snippet fetches emails and appointments and can be broadened.

December 27, 2016

by Shantanu Sikdar

· 65,950 Views · 6 Likes

Performance Ingredients for NoSQL: Intersect Scans in N1QL

Query processing is one of the most complex and complicated areas in the database realm. Intersect scans leverage multiple indexes for a query and bring subtle performance characteristics.

December 26, 2016

by Prasad Varakur

· 6,381 Views · 4 Likes

Variables in DataWeave

It is possible to define variables in DataWeave header, DataWeave body, and flow variables before the DataWeave component in a Mule flow in DataWeave code.

December 26, 2016

by Swati Deshpande

· 41,714 Views · 5 Likes

How to Resolve the ''ActiveMQConnectionFactory Class Not Found'' Exception

This error means that your Mule application is looking for activemq supporting classes in your project and it is not finding any.

December 26, 2016

by Akkiraju Ivaturi

· 24,651 Views · 3 Likes

Configuring Memory for MapReduce Running on YARN

There are times when a MapReduce job exceeds its memory limits. This article presents an overview of how YARN monitors the memory for containers and provides the technique to fix this issue.

December 23, 2016

by Alex Holmes

· 61,372 Views · 2 Likes

Is Standard Java Logging Dead?

Does JUL still have a place in the ecosystem? See how a variety of third-party logging tools stack up against Java's built-in logging power.

December 23, 2016

by Alex Zhitnitsky

· 18,758 Views · 10 Likes

JDK 9: An Introduction to StackWalker

StackWalker is an API for stack walking that allows easy filtering of, and lazy access to, the information in stack traces.

December 22, 2016

by Hemambara Vamsi Kotari

· 24,054 Views · 24 Likes

We Don't Need StringBuilder for Simple Concatenation

Concatenating strings is useful, but expensive. Fortunately, you don't need to use StringBuilder anymore - the compiler can handle it for you.

December 22, 2016

by A N M Bazlur Rahman

CORE

· 195,135 Views · 44 Likes

What Is Node.js for Java Developers?

Node.js is growing in popularity, but how exactly does it work? This guide breaks down the terminology into Java-friendly terms for easy understanding.

December 22, 2016

by Ratha KM

· 81,712 Views · 57 Likes

Being Wary Does Not Hurt Java

Being careful is not the same as being hurtful to the larger community. With Oracle's licensing audits still fresh in mind, it's important to stay alert.

December 21, 2016

by Markus Eisele

· 13,802 Views · 19 Likes

Apache NiFi 1.x Cheatsheet

This quick and easy guide will show you how to make Apache NiFi work for you, including processors, connections, and APIs.

December 20, 2016

by Tim Spann

CORE

· 21,899 Views · 8 Likes

A Look at ScheduledService [Code Snippets]

ScheduledService lets you execute the same task a regular intervals and can even restart itself in the event of a failure, making it a good tool to have in the box.

December 20, 2016

by Arun Pandey

CORE

· 39,657 Views · 8 Likes

Plant UML Pleasantness: Change Line Style and Color

PlantUML is a great Java design tool for working on your classes using standard UML. It's an open-source tool that allows for great customization.

December 17, 2016

by Hubert Klein Ikkink

· 9,495 Views · 5 Likes

Investigating KnockoutJS in Oracle JET

An introduction to the best use cases for KnockoutJS, how it's differentiated from other JavaScript frameworks, and how it's used in Oracle JET.

December 16, 2016

by Chris Muir

· 15,363 Views · 7 Likes

An Overview of Meta-Monitoring

Meta-monitoring is basically self-service for monitoring. There are several different requirements and methods that should be kept in mind when it comes to meta-monitoring.

December 15, 2016

by Thomas Kurian Theakanath

· 5,409 Views · 2 Likes

How SAML Authentication Works

This comprehensive guide to SAML covers how the authentication protocol works, how requests are generated and read, and what tools can help you keep projects secure.

December 15, 2016

by Prosper Otemuyiwa

· 89,743 Views · 12 Likes

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