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Tag Archives: Elasticsearch

Index Data from a Relational Database into Elasticsearch – 1

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Elasticsearch provides powerful search capabilities with support for sharding and replication of the data. So we would want to index data available in our DB into Elasticsearch. There are multiple ways to index data into Elasticsearch: Use Logstash to setup source as DB and sink as Elasticsearch and use a filter if required to build JSON object. Use an external ...

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Elasticsearch for Java Developers: Elasticsearch from the command line

This article is part of our Academy Course titled Elasticsearch Tutorial for Java Developers. In this course, we provide a series of tutorials so that you can develop your own Elasticsearch based applications. We cover a wide range of topics, from installation and operations, to Java API Integration and reporting. With our straightforward tutorials, you will be able to get ...

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Elasticsearch for Java Developers: Introduction

This article is part of our Academy Course titled Elasticsearch Tutorial for Java Developers. In this course, we provide a series of tutorials so that you can develop your own Elasticsearch based applications. We cover a wide range of topics, from installation and operations, to Java API Integration and reporting. With our straightforward tutorials, you will be able to get ...

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Java Clients for Elasticsearch Transcript

java-interview-questions-answers

In this talk I will introduce three different clients for elasticsearch as well as Spring Data Elasticsearch. But to get started let’s look at some of the basics of elasticsearch. elasticsearch To introduce elasticsearch I am using a definition that is taken directly from the elastic website. Elasticsearch is a distributed, JSON-based search and analytics engine, designed for horizontal scalability, ...

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How to Secure Elasticsearch and Kibana

Introduction Elasticsearch (ES) is a search engine based on Lucene. It provides a distributed, multitenant-capable, full-text search engine with an HTTP web interface and schema-free JSON documents. Kibana is an open source data visualization plugin for Elasticsearch. It provides visualization capabilities on top of the content indexed on an Elasticsearch cluster. Users can create bar, line, and scatter plots, or pie charts and maps on top of large volumes of data. ...

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A Simple Way to Index Java Beans in Elasticsearch

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When it comes to data stores Java programmers are used to working with Java beans that are magically persisted. Solutions like Hibernate and the JPA specification for relational data stores or Morphia and Spring Data MongoDB are popular examples. Developers working with Elasticsearch sometimes have the same desire – pass a Java bean and have it indexed automatically. There is ...

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Logging Requests to Elasticsearch

This is something I wanted to write down for years but never got down to completing the post. It can help you a lot with certain Elasticsearch setups by answering two questions using the slow log. Is my application talking to Elasticsearch? What kind of queries are being built by my application? A while ago I helped a colleague on ...

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Mining Mailboxes with Elasticsearch and Kibana

In a previous post I had mentioned that the trio of Logstash, Kibana and Elasticsearch (ELK stack) is one of the most popular open source solutions for not only logs management but also data analysis. In this post I will demonstrate how ELK can be used to effectively and efficiently perform big data analysis. As a reference let’s take some ...

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Anatomy Of Setting Up An Elasticsearch N-Gram Word Analyzer

java-interview-questions-answers

To say that n-grams are a massive topic would be an understatement. Do a quick search and you will find yourself staring down volumes of information on linguistics and language models, on data mining, or on the implication of the breakdown of specific proteins on the decline of debutante culture. Okay, I’m kidding about that last one. But if you ...

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