When the Guava project released version 11.0, one of the new additions was the BloomFilter class. A BloomFilter is a unique data-structure used to indicate if an element is contained in a set. What makes a BloomFilter interesting is it will indicate if an element is absolutely not contained, or may be contained in a [...]
Event Programming Example: Google Guava EventBus and Java 7 WatchService
February 24, 2012 By Leave a Comment
This post is going to cover using the Guava EventBus to publish changes to a directory or sub-directories detected by the Java 7 WatchService. The Guava EventBus is a great way to add publish/subscribe communication to an application. The WatchService, new in the Java 7 java.nio.file package, is used to monitor a directory for changes. [...]
What’s New in Java 7: WatchService
February 24, 2012 By 1 Comment
Of all the new features in Java 7, one of the more interesting is the WatchService, adding the capability to watch a directory for changes. The WatchService maps directly to the native file event notification mechanism, if available. If a native event notification mechanism is not available, then the default implementation will use polling. As [...]
Creating An Asynchronous, Recursive DirectoryStream in Java 7
February 10, 2012 By 4 Comments
Continuing with my series on the Java 7 java.nio.file package, this time covering the DirectoryStream interface. In this post we are going implement our own DirectoryStream that will iterate over the files in an entire directory tree, not just a single directory. Our goal in the end is to have something that works similar to [...]
What’s New In Java 7: Copy and Move Files and Directories
January 30, 2012 By 2 Comments
This post is a continuation of my series on the Java 7 java.nio.file package, this time covering the copying and moving of files and complete directory trees. If you have ever been frustrated by Java’s lack of copy and move methods, then read on, for relief is at hand. Included in the coverage is the [...]
What’s new in Java 7 – The (Quiet) NIO File Revolution
January 20, 2012 By 16 Comments
Java 7 (“Project Coin”) has been out since July of last year. The additions with this release are useful, for example Try with resources – having closable resources handled automatically from try blocks, Strings in switch statements, multicatch for Exceptions and the ‘‘ operator for working with generics. The addition that everyone was anticipating the [...]
Event Programming with Google Guava EventBus
January 6, 2012 By 15 Comments
It’s a given in any software application there are objects that need to share information in order to get work done. In Java applications, one way of achieving information sharing is to have event listeners, whose sole purpose is to take some action when a desired event occurs. For the most part this process works [...]
Guava Functions & Java 8 Lambdas
December 23, 2011 By 8 Comments
I recently read Brian Goetz’s The State of the Lambda and after reading that article I wanted to try using Java 8 lambda expressions. In his article, Brian goes on to describe interfaces that have one method as “functional” interfaces. Functional interfaces are almost always used as anonymous classes, with the ActionListener being the canonical [...]
Google Guava Cache
December 14, 2011 By 9 Comments
This Post is a continuation of my series on Google Guava, this time covering Guava Cache. Guava Cache offers more flexibility and power than either a HashMap or ConcurrentHashMap, but is not as heavy as using EHCache or Memcached (or robust for that matter, as Guava Cache operates solely in memory). The Cache interface has [...]
Simple WordPress Backups
December 6, 2011 By Leave a Comment
Backing up your data is an important task. As we all know, it’s not a matter of if you are going to experience a crash or failure, but when. Blogs are no exception. I wanted to take a break from my regular style of posts to share my simple backup script. While I’m know there [...]
