Lucene, Solr, Elastic Search and Crawl consultant

Split wav/flac/ape files with cue

Kelvin — Tue, 08 May 2012 01:37:15 +0000

If you ever need to split a disc image which has been burned as a single wav/flac/ape file with a corresponding cue file, this will help you out.

Split2flac does all the tedium of splitting, renaming (according to a renaming ...

Lucene multi-point spatial search

Kelvin — Sat, 14 Apr 2012 22:01:29 +0000

This post describes a method of augmenting the lucene-spatial contrib package to support multi-point searches. It is quite similar to the method described http://www.supermind.org/blog/548/multiple-latitudelongitude-pairs-for-a-single-solrlucene-doc with some minor modifications.

The problem is as follows:

A company (mapped as a Lucene

...

Non-blocking/NIO HTTP requests in Java with Jetty's HttpClient

Kelvin — Mon, 05 Mar 2012 05:45:57 +0000

Jetty 6/7 contain a HttpClient class that make it uber-easy to issue non-blocking HTTP requests in Java. Here is a code snippet to get you started.

Initialize the HttpClient object.

HttpClient client =

...

Using contextual hints to improve Solr's autocomplete suggester

Kelvin — Sat, 03 Mar 2012 23:23:02 +0000

Context-less multi-term autocomplete is difficult.

Given the term "di", we can look at our index and rank terms starting with "di" by frequency and return the n most frequent terms. Solr's TSTLookup and FSTLookup do this very well. ...

Solr autocomplete with document suggestions

Kelvin — Sat, 03 Mar 2012 22:56:17 +0000

Solr 3.5 comes with a nice autocomplete/typeahead component that is based on the SolrSpellCheckComponent.

You provide it a query and a field, and the Suggester returns a list of suggestions based on the query. For example:

Book review of Apache Solr 3 Enterprise Search Server

Kelvin — Tue, 28 Feb 2012 05:58:47 +0000

Apache Solr 3 Enterprise Search Server published by Packt Publishing is the only Solr book available at the moment.

It's a fairly comprehensive book, and discusses many new Solr 3 features. Considering the breakneck pace of Solr development and ...

Apache Solr book review coming soon..

Kelvin — Tue, 28 Feb 2012 04:58:03 +0000

Just received my review copy of the only Apache Solr book on the market..

http://www.packtpub.com/apache-solr-3-enterprise-search-server/book

My book review to follow shortly..

Batch convert svg to png in Ubuntu

Kelvin — Thu, 20 Oct 2011 04:55:36 +0000

sudo apt-get install librsvg2-bin
for i in *; do rsvg-convert -a $i -o `echo $i | sed -e 's/svg$/png/'`; done

to rasterize the ...

Mount a .dmg file in Ubuntu

Kelvin — Tue, 11 Oct 2011 13:47:29 +0000

sudo apt-get install dmg2img
dmg2img /path/to/image.dmg
sudo modprobe hfsplus
sudo mount -t hfsplus -o loop image.img /mnt

The .dmg archive is now mounted at /mnt. You ...

Download KhanAcademy videos with a PHP crawler

Kelvin — Sun, 09 Oct 2011 00:35:54 +0000

At the moment (October 2011), there's no simple way to download all videos from a playlist from KhanAcademy.org.

This simple PHP crawler script changes that.

What it does is downloads the videos (from archive.org) ...