Monday, September 26, 2016

Redis Cluster Setup


Redis is NoSQL key-value in-memory distributed data store. It can be used as super-fast database, cache or message broker.

Please check out this very useful article about Redis Cluster Setup on Linux: Configuring and Running Redis Cluster on Linux


Sunday, February 21, 2016

Java 8 Finding Specific Element in List with Lambda




As you probably know in Java 8 we can use Lambda expression for different manipulations with collections.
java8-lambda-expression

If you have a List with some custom objects inside and you want to find specific element in it you can use stream().filter procedure of Lambda instead of ForEach as you probably used to. Below is a simple example of this case.

List<RepositoryFile> fileList = response.getRepositoryFileList();
RepositoryFile file1 = fileList.stream().filter(f -> f.getName().contains("my-file.txt")).findFirst().orElse(null);

Thursday, February 18, 2016

Java JSON Parser Example with Regex



Recently I came across with problem where I needed to recognize and parse custom exception message inside JSON on Java server side. For that particular problem I used Regex.

The JSON response format is like this:

json-with-exception-message

And this is the code: