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. [...]
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 [...]
Google Guava – Futures
November 29, 2011 By 9 Comments
This post is a continuation of my series on Google Guava, this time covering Futures. The Futures class is a collection of static utility methods for working with the Future/ListenableFuture interface. A Future is a handle to an asynchronous task, either a Runnable or Callable, that was submitted to an ExecutorService. The Future interface provides [...]
Google Guava Concurrency – ListenableFuture
November 22, 2011 By 2 Comments
In my last post I covered using the Monitor class from the com.google.common.util.concurrent package in the Guava Library. In this post I am going to continue my coverage of Guava concurrency utilities and discuss the ListenableFuture interface. A ListenableFuture extends the Future interface from the java.util.concurrent package, by adding a method that accepts a completion [...]
Google Guava – Synchronization with Monitor
November 16, 2011 By 3 Comments
The Google Guava project is a collection of libraries that every Java developer should become familiar with. The Guava libraries cover I/O, collections, string manipulation, and concurrency just to name a few. In this post I am going to cover the Monitor class. Monitor is a synchronization construct that can be used anywhere you would [...]
