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You're reading from  Solr Cookbook - Third Edition

Product typeBook
Published inJan 2015
Reading LevelIntermediate
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ISBN-139781783553150
Edition1st Edition
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Rafal Kuc
Rafal Kuc
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Rafal Kuc

Rafał Kuć is a software engineer, trainer, speaker and consultant. He is working as a consultant and software engineer at Sematext Group Inc. where he concentrates on open source technologies such as Apache Lucene, Solr, and Elasticsearch. He has more than 14 years of experience in various software domains—from banking software to e–commerce products. He is mainly focused on Java; however, he is open to every tool and programming language that might help him to achieve his goals easily and quickly. Rafał is also one of the founders of the solr.pl site, where he tries to share his knowledge and help people solve their Solr and Lucene problems. He is also a speaker at various conferences around the world such as Lucene Eurocon, Berlin Buzzwords, ApacheCon, Lucene/Solr Revolution, Velocity, and DevOps Days. Rafał began his journey with Lucene in 2002; however, it wasn't love at first sight. When he came back to Lucene in late 2003, he revised his thoughts about the framework and saw the potential in search technologies. Then Solr came and that was it. He started working with Elasticsearch in the middle of 2010. At present, Lucene, Solr, Elasticsearch, and information retrieval are his main areas of interest. Rafał is also the author of the Solr Cookbook series, ElasticSearch Server and its second edition, and the first and second editions of Mastering ElasticSearch, all published by Packt Publishing.
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Using versioning


When working with NoSQL solutions such as Solr, we usually don't have the notion of transaction and we can't predict the sequence in which documents will be received by Solr and indexed especially when indexing is done from multiple threads and machines. However, in certain cases, such a functionality is needed at least to some degree. For example, we don't want to run an update on a document that was updated between the time period we read the document and sent the update. This recipe will show you how to avoid such situations.

Getting ready

This recipe uses the functionality discussed in the Updating document fields recipe from Chapter 2, Indexing Your Data. Read this recipe before proceeding.

How to do it...

For the purpose of this recipe, we assume that we have an e-commerce library. When updating prices of the books, we need to read the document to get the current price, update it in the UI, and index the document. However, it can happen that the same book is being updated...

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Solr Cookbook - Third Edition
Published in: Jan 2015Publisher: ISBN-13: 9781783553150

Author (1)

author image
Rafal Kuc

Rafał Kuć is a software engineer, trainer, speaker and consultant. He is working as a consultant and software engineer at Sematext Group Inc. where he concentrates on open source technologies such as Apache Lucene, Solr, and Elasticsearch. He has more than 14 years of experience in various software domains—from banking software to e–commerce products. He is mainly focused on Java; however, he is open to every tool and programming language that might help him to achieve his goals easily and quickly. Rafał is also one of the founders of the solr.pl site, where he tries to share his knowledge and help people solve their Solr and Lucene problems. He is also a speaker at various conferences around the world such as Lucene Eurocon, Berlin Buzzwords, ApacheCon, Lucene/Solr Revolution, Velocity, and DevOps Days. Rafał began his journey with Lucene in 2002; however, it wasn't love at first sight. When he came back to Lucene in late 2003, he revised his thoughts about the framework and saw the potential in search technologies. Then Solr came and that was it. He started working with Elasticsearch in the middle of 2010. At present, Lucene, Solr, Elasticsearch, and information retrieval are his main areas of interest. Rafał is also the author of the Solr Cookbook series, ElasticSearch Server and its second edition, and the first and second editions of Mastering ElasticSearch, all published by Packt Publishing.
Read more about Rafal Kuc