Lucene is an open-source search engine library written in Java. It provides functionality for indexing, searching, and ranking documents. Key Lucene concepts include Documents, Fields, Analyzers, IndexWriters, IndexSearchers, and Queries. Documents contain Fields, which represent sections of text to index. Analyzers prepare text for indexing by performing operations like tokenization. IndexWriters create and maintain indexes, while IndexSearchers search through indexes using Query objects.
Apache LuceneTM is a free open-source , high-performance, full-featured text search engine library that has been written completely in Java. As a technology is best suited for any application that requires full-text search, especially cross-platform.
Presented by Adrien Grand, Software Engineer, Elasticsearch
Although people usually come to Lucene and related solutions in order to make data searchable, they often realize that it can do much more for them. Indeed, its ability to handle high loads of complex queries make Lucene a perfect fit for analytics applications and, for some use-cases, even a credible replacement for a primary data-store. It is important to understand the design decisions behind Lucene in order to better understand the problems it can solve and the problems it cannot solve. This talk will explain the design decisions behind Lucene, give insights into how Lucene stores data on disk and how it differs from traditional databases. Finally, there will be highlights of recent and future changes in Lucene index file formats.
Apache LuceneTM is a free open-source , high-performance, full-featured text search engine library that has been written completely in Java. As a technology is best suited for any application that requires full-text search, especially cross-platform.
Presented by Adrien Grand, Software Engineer, Elasticsearch
Although people usually come to Lucene and related solutions in order to make data searchable, they often realize that it can do much more for them. Indeed, its ability to handle high loads of complex queries make Lucene a perfect fit for analytics applications and, for some use-cases, even a credible replacement for a primary data-store. It is important to understand the design decisions behind Lucene in order to better understand the problems it can solve and the problems it cannot solve. This talk will explain the design decisions behind Lucene, give insights into how Lucene stores data on disk and how it differs from traditional databases. Finally, there will be highlights of recent and future changes in Lucene index file formats.
Apache Lucene starter for developers and novices, illustrates simple code example. complete source code can be found on - https://github.com/ani03sha/lucene-starter
Munching & crunching - Lucene index post-processingabial
Lucene EuroCon 10 presentation on index post-processing (splitting, merging, sorting, pruning), tiered search, bitwise search, and a few slides on MapReduce indexing models (I ran out of time to show them, but they are there...)
Search is everywhere, and therefore so is Apache Lucene. While providing amazing out-of-the-box defaults, there’s enough projects weird enough to require custom search scoring and ranking. In this talk, I’ll walk through how to use Lucene to implement your custom scoring and search ranking. We’ll see how you can achieve both amazing power (and responsibility) over your search results. We’ll see the flexibility of Lucene’s data structures and explore the pros/cons of custom Lucene scoring vs other methods of improving search relevancy.
Intro talk for UNC School of Information and Library Science. Covers basics of Lucene and Solr as well as info on Lucene/Solr jobs, opportunities, etc.
Multi faceted responsive search, autocomplete, feeds engine & logginglucenerevolution
Presented by Remi Mikalsen, Search Engineer, The Norwegian Centre for ICT in Education
Learn how utdanning.no leverages open source technologies to deliver a blazing fast multi-faceted responsive search experience and a flexible and efficient feeds engine on top of Solr 3.6. Among the key open source projects that will be covered are Solr, Ajax-Solr, SolrPHPClient, Bootstrap, jQuery and Drupal. Notable highlights are ajaxified pivot facets, multiple parents hierarchical facets, ajax autocomplete with edge-n-gram and grouping, integrating our search widgets on any external website, custom Solr logging and using Solr to deliver Atom feeds. utdanning.no is a governmental website that collects, normalizes and publishes study information for related to secondary school and higher education in Norway. With 1.2 million visitors each year and 12.000 indexed documents we focus on precise information and a high degree of usability for students, potential students and counselors.
May 2012 JaxDUG presentation by Zachary Gramana on using the Lucene.NET library to add search functionality to .NET applications. Contains an overview of search/information retrieval concepts and highlights some common use-cases.
Presentation at ApacheCon US 2008 (New Orleans) by Paolo Mottadelli. This is about the Apache Tika project and how it was integrated in Alfresco in order to support Open XML format Full Text Search.
High Performance JSON Search and Relational Faceted Browsing with Lucenelucenerevolution
Presented by Renaud Delbru, Co-Founder, SindiceTech
In this presentation, we will discuss how Lucene and Solr can be used for very efficient search of tree-shaped schemaless document, e.g. JSON or XML, and can be then made to address both graph and relational data search. We will discuss the capabilities of SIREn, a Lucene/Solr plugin we have developed to deal with huge collections of tree-shaped schemaless documents, and how SIREn is built using Lucene extensibility capabilities (Analysis, Codec, Flexible Query Parser). We will compare it with Lucene's BlockJoin Query API in nested schemaless data intensive scenarios. We will then go through use cases that show how relational or graph data can be turned into JSON documents using Hadoop and Pig, and how this can be used in conjunction with SIREn to create relational faceting systems with unprecedented performance. Take-away lessons from this session will be awareness about using Lucene/Solr and Hadoop for relational and graph data search, as well as the awareness that it is now possible to have relational faceted browsers with sub-second response time on commodity hardware.
A presentation from ApacheCon Europe 2015 / Apache Big Data Europe 2015
Apache Tika detects and extracts metadata and text from a huge range of file formats and types. From Search to Big Data, single file to internet scale, if you've got files, Tika can help you get out useful information!
Apache Tika has been around for nearly 10 years now, and in that time, a lot has changed. Not only has the number of formats supported gone up and up, but the ways of using Tika have expanded, and some of the philosophies on the best way to handle things have altered with experience. Tika has gained support for a wide range of programming languages to, and more recently, Big-Data scale support, and ways to automatically compare effects of changes to the library.
Whether you're an old-hand with Tika looking to know what's hot or different, or someone new looking to learn more about the power of Tika, this talk will have something in it for you!
Apache Lucene starter for developers and novices, illustrates simple code example. complete source code can be found on - https://github.com/ani03sha/lucene-starter
Munching & crunching - Lucene index post-processingabial
Lucene EuroCon 10 presentation on index post-processing (splitting, merging, sorting, pruning), tiered search, bitwise search, and a few slides on MapReduce indexing models (I ran out of time to show them, but they are there...)
Search is everywhere, and therefore so is Apache Lucene. While providing amazing out-of-the-box defaults, there’s enough projects weird enough to require custom search scoring and ranking. In this talk, I’ll walk through how to use Lucene to implement your custom scoring and search ranking. We’ll see how you can achieve both amazing power (and responsibility) over your search results. We’ll see the flexibility of Lucene’s data structures and explore the pros/cons of custom Lucene scoring vs other methods of improving search relevancy.
Intro talk for UNC School of Information and Library Science. Covers basics of Lucene and Solr as well as info on Lucene/Solr jobs, opportunities, etc.
Multi faceted responsive search, autocomplete, feeds engine & logginglucenerevolution
Presented by Remi Mikalsen, Search Engineer, The Norwegian Centre for ICT in Education
Learn how utdanning.no leverages open source technologies to deliver a blazing fast multi-faceted responsive search experience and a flexible and efficient feeds engine on top of Solr 3.6. Among the key open source projects that will be covered are Solr, Ajax-Solr, SolrPHPClient, Bootstrap, jQuery and Drupal. Notable highlights are ajaxified pivot facets, multiple parents hierarchical facets, ajax autocomplete with edge-n-gram and grouping, integrating our search widgets on any external website, custom Solr logging and using Solr to deliver Atom feeds. utdanning.no is a governmental website that collects, normalizes and publishes study information for related to secondary school and higher education in Norway. With 1.2 million visitors each year and 12.000 indexed documents we focus on precise information and a high degree of usability for students, potential students and counselors.
May 2012 JaxDUG presentation by Zachary Gramana on using the Lucene.NET library to add search functionality to .NET applications. Contains an overview of search/information retrieval concepts and highlights some common use-cases.
Presentation at ApacheCon US 2008 (New Orleans) by Paolo Mottadelli. This is about the Apache Tika project and how it was integrated in Alfresco in order to support Open XML format Full Text Search.
High Performance JSON Search and Relational Faceted Browsing with Lucenelucenerevolution
Presented by Renaud Delbru, Co-Founder, SindiceTech
In this presentation, we will discuss how Lucene and Solr can be used for very efficient search of tree-shaped schemaless document, e.g. JSON or XML, and can be then made to address both graph and relational data search. We will discuss the capabilities of SIREn, a Lucene/Solr plugin we have developed to deal with huge collections of tree-shaped schemaless documents, and how SIREn is built using Lucene extensibility capabilities (Analysis, Codec, Flexible Query Parser). We will compare it with Lucene's BlockJoin Query API in nested schemaless data intensive scenarios. We will then go through use cases that show how relational or graph data can be turned into JSON documents using Hadoop and Pig, and how this can be used in conjunction with SIREn to create relational faceting systems with unprecedented performance. Take-away lessons from this session will be awareness about using Lucene/Solr and Hadoop for relational and graph data search, as well as the awareness that it is now possible to have relational faceted browsers with sub-second response time on commodity hardware.
A presentation from ApacheCon Europe 2015 / Apache Big Data Europe 2015
Apache Tika detects and extracts metadata and text from a huge range of file formats and types. From Search to Big Data, single file to internet scale, if you've got files, Tika can help you get out useful information!
Apache Tika has been around for nearly 10 years now, and in that time, a lot has changed. Not only has the number of formats supported gone up and up, but the ways of using Tika have expanded, and some of the philosophies on the best way to handle things have altered with experience. Tika has gained support for a wide range of programming languages to, and more recently, Big-Data scale support, and ways to automatically compare effects of changes to the library.
Whether you're an old-hand with Tika looking to know what's hot or different, or someone new looking to learn more about the power of Tika, this talk will have something in it for you!
A comparison of different solutions for full-text search in web applications using PostgreSQL and other technology. Presented at the PostgreSQL Conference West, in Seattle, October 2009.
Philly PHP: April '17 Elastic Search Introduction by Aditya BhamidpatiRobert Calcavecchia
Philly PHP April 2017 Meetup: Introduction to Elastic Search as presented by Aditya Bhamidpati on April 19, 2017.
These slides cover an introduction to using Elastic Search
Anno4j - Idiomatic Persistence and Querying for the W3C Annotation Data ModelEmanuel Berndl
Anno4j is a Java library that creates a ORM (Object-RDF-Mapping) in order to create and query RDF by writing Java POJOs. More specifically, it allows to create Web Annotations (from the W3C Web Annotation Data Model) by predefining necessary classes and interfaces. Own RDF models can easily be integrated, as the library is designed in an extensive fashion. Comprehensive querying is implemented by the use of the path-based query language LDPath.
It builds upon the Alibaba library and brings a set of convenience features, such as subgraphing, transactions, and plugin extensibility.
by Mikhail Prudnikov, Sr. Solutions Architect, AWS
Elasticsearch is a popular open-source distributed search and analytics engine, widely used for log analytics and text search – and increasingly used as a primary data store. Amazon Elasticsearch Service makes it easy to deploy, secure, operate, and scale Elasticsearch. We’ll take a look at how to use Elasticsearch Service to manage these different use cases.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
1. The Lucene Search Engine
Kira Radinsky
Based on the material from: Thomas Paul and Steven J. Owens
2. What is Lucene?
• Doug Cutting’s grandmother’s middle name
• A open source set of Java Classses
– Search Engine/Document Classifier/Indexer
– Developed by Doug Cutting (1996)
• Xerox/Apple/Excite/Nutch/Yahoo/Cloudera
• Hadoop founder, Board of directors of the Apache Software
• Jakarta Apache Product. Strong open source
community support.
• High-performance, full-featured text search
engine library
• Easy to use yet powerful API
3. Use the Source, Luke
• Document
• Field
– Represents a section of a Document: name for the section + the actual data.
• Analyzer
– Abstract class (to provide interface)
– Document -> tokens (for later indexing)
– StandardAnalyzer class.
• IndexWriter
– Creates and maintains indexes.
• IndexSearcher
– Searches through an index.
• QueryParser
– Builds a parser that can search through an index.
• Query
– Abstract class that contains the search criteria created by the QueryParser.
• Hits
– Contains the Document objects that are returned by running the Query object against the index.
5. Document from an article
private Document createDocument(String article, String author,
String title, String topic,
String url,
Date dateWritten)
{
Document document = new Document();
document.add(Field.Text("author", author));
document.add(Field.Text("title", title));
document.add(Field.Text("topic", topic));
document.add(Field.UnIndexed("url", url));
document.add(Field.Keyword("date", dateWritten));
document.add(Field.UnStored("article", article));
return document;
}
6. The Field Object
Factory Method Tokenized Indexed Stored Use for
Field.Text(String name,
String value)
Yes Yes Yes
contents you want
stored
Field.Text(String name,
Reader value)
Yes Yes No
contents you don't
want stored
Field.Keyword(String
name, String value)
No Yes Yes
values you don't want
broken down
Field.UnIndexed(String
name, String value)
No No Yes
values you don't want
indexed
Field.UnStored(String
name, String value)
Yes Yes No
values you don't want
stored
7. Store a Document in the index
String indexDirectory = "lucene-index";
private void indexDocument(Document document)
throws Exception
{
Analyzer analyzer = new StandardAnalyzer();
IndexWriter writer = new IndexWriter(
indexDirectory,
analyzer, false
);
writer.addDocument(document);
writer.optimize();
writer.close();
}
8. Analyzers and Tokenizers
SimpleAnalyzer SimpleAnalyzer seems to just use a Tokenizer that converts all
of the input to lower case.
StopAnalyzer StopAnalyzer includes the lower-case filter, and also has a filter
that drops out any "stop words", words like articles (a, an, the,
etc) that occur so commonly in english that they might as well
be noise for searching purposes. StopAnalyzer comes with a
set of stop words, but you can instantiate it with your own
array of stop words.
StandardAnalyzer StandardAnalyzer does both lower-case and stop-word
filtering, and in addition tries to do some basic clean-up of
words, for example taking out apostrophes ( ' ) and removing
periods from acronyms (i.e. "T.L.A." becomes "TLA").
Lucene Sandbox Here you can find analyzers in your own language
9. Adding to an Index
public void indexArticle(
String article,
String author,
String title, String topic,
String url, Date dateWritten)
throws Exception
{
Document document = createDocument
(
article, author,
title, topic, url,
dateWritten
);
indexDocument(document);
}
11. Searching
IndexSearcher is = new
IndexSearcher(indexDirectory);
Analyzer analyzer = new StandardAnalyzer();
QueryParser parser = new QueryParser("article",
analyzer);
Query query = parser.parse(searchCriteria);
Hits hits = is.search(query);
12. Extracting Document objects
for (int i=0; i<hits.length(); i++)
{
Document doc = hits.doc(i);
// display the articles that were
found to the user
}
13. Search Criteria
Supports several searches: AND OR and NOT,
fuzzy, proximity searches, wildcard searches, and
range searches
– author:Henry relativity AND "quantum physics“
– "string theory" NOT Einstein
– "Galileo Kepler"~5
– author:Johnson date:[01/01/2004 TO 01/31/2004]
14. Thread Safety
• Indexing and searching are not only thread safe,
but process safe. What this means is that:
– Multiple index searchers can read the lucene index
files at the same time.
– An index writer or reader can edit the lucene index
files while searches are ongoing
– Multiple index writers or readers can try to edit the
lucene index files at the same time (it's important for
the index writer/reader to be closed so it will release
the file lock).
• The query parser is not thread safe,
• The index writer however, is thread safe,