Apache Solr Atomic Updates: a Polymorphic Approach

In this post we describe an approach to solve the problem of an application that requires both Full and Atomic Updates, using one of the powerful concepts in Object Oriented Programming: Polymorphism.
Digging in the Solr code: 5 minutes howto

How to quickly debug a custom Apache Solr component (e.g. request handler, query parser, filter) in your favourite IDE.
The example uses IntelliJ but it is valid for any IDE.
Rated Ranking Evaluator: Help the poor (Search Engineer)

What is Search Quality? Why is it so important in a search infrastructure?
Do you need something that gives you the evidence about the direction the search system is going to? RRE is the tool you’re looking for.
Apache Solr: Orchestrating Known item and Full-text search

The Apache Solr Invisible Queries Request Handler
Apache Solr: Give the Height the Right Weight

Quantity detection? What is a quantity? And why do we need to detect it?
In this post we introduce a quantity detection plugin for Apache Solr.
Apache Solr: How To Implement a Search Workflow

In this post we describe an approach for orchestrating a search workflow in Apache Solr using Invisible Queries.
How to Implement a Search workflow in Apache Solr?
Towards a scalable Solr-based RDF Store

SolRDF (i.e., Solr + RDF) is a set of Solr extensions for managing (indexing and searching) RDF data. In a preceding post, I described how to set up a standalone SolRDF instance in two minutes; in this post, I’ll describe how to run SolRDF in a simple cluster. The required steps are similar to what […]
SPARQL Integration tests with SolRDF

The SolRDF Integration Tests Suite
Solr SPARQL Endpoint in Two Minutes

A Solr-backed RDF Store in 2 minutes.
RDF in Solr: HowTo

The Solr built-in UpdateRequestHandler supports several formats of input data. It delegates the actual data loading to a specific ContentStreamLoader, depending on the content type of the incoming request (i.e., the Content-type header of the HTTP request). Currently, these are the available content types declared in the UpdateRequestHandler class: application/xml or text/xml application/json or text/json application/csv or text/csv application/javabin So, a client has several options […]