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git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@751730 13f79535-47bb-0310-9956-ffa450edef68
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Otis Gospodnetic 2009-03-09 16:32:03 +00:00
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<h1>Lucene Java Documentation</h1>
<h1>
Apache Lucene - Overview
</h1>
<div id="minitoc-area">
<ul class="minitoc">
<li>
<a href="#Apache Lucene">Apache Lucene</a>
</li>
<li>
<a href="#Lucene News">Lucene News</a>
<ul class="minitoc">
<li>
<a href="#9+March+2009+-+Lucene+Java+2.4.1+available">9 March 2009 - Lucene Java 2.4.1 available</a>
</li>
<li>
<a href="#09+February+2009+-+Lucene+at+ApacheCon+Europe+2009+in+Amsterdam">09 February 2009 - Lucene at ApacheCon Europe 2009 in Amsterdam</a>
</li>
<li>
<a href="#8+October+2008+-+Lucene+Java+2.4.0+available">8 October 2008 - Lucene Java 2.4.0 available</a>
</li>
<li>
<a href="#06+May+2008+-+Lucene+Java+2.3.2+available">06 May 2008 - Lucene Java 2.3.2 available</a>
</li>
<li>
<a href="#23+February+2008+-+Lucene+Java+2.3.1+available">23 February 2008 - Lucene Java 2.3.1 available</a>
</li>
<li>
<a href="#24+January+2008+-+Lucene+Java+2.3.0+available">24 January 2008 - Lucene Java 2.3.0 available</a>
</li>
<li>
<a href="#23+January+2008+-+Lucene+at+ApacheCon+Europe">23 January 2008 - Lucene at ApacheCon Europe</a>
</li>
<li>
<a href="#24+December+2007+-+Nightly+Snapshots+available+in+the+Apache+Maven+Snapshot+Repository">24 December 2007 - Nightly Snapshots available in the Apache Maven Snapshot Repository</a>
</li>
<li>
<a href="#26+August+2007+-+Lucene+at+ApacheCon+Atlanta">26 August 2007 - Lucene at ApacheCon Atlanta</a>
</li>
<li>
<a href="#19+June+2007+-+Release+2.2+available">19 June 2007 - Release 2.2 available</a>
</li>
<li>
<a href="#18+February+2007+-+Lucene+at+ApacheCon+Europe">18 February 2007 - Lucene at ApacheCon Europe</a>
</li>
<li>
<a href="#17+February+2007+-+Release+2.1+available">17 February 2007 - Release 2.1 available</a>
</li>
<li>
<a href="#3+January+2007+-+Nightly+Source+builds+available">3 January 2007 - Nightly Source builds available</a>
</li>
</ul>
</li>
</ul>
</div>
<a name="N1000C"></a><a name="Apache Lucene"></a>
<h2 class="boxed">Apache Lucene</h2>
<div class="section">
<p>
Apache Lucene is a high-performance, full-featured text search engine
library written entirely in Java. It is a technology suitable for nearly any
application that requires full-text search, especially cross-platform.
</p>
<p>
Apache Lucene is an open source project available for
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">free download</a>.
Please use the links on the left to access Lucene.
</p>
</div>
<a name="N1001D"></a><a name="Lucene News"></a>
<h2 class="boxed">Lucene News</h2>
<div class="section">
<a name="N10023"></a><a name="9+March+2009+-+Lucene+Java+2.4.1+available"></a>
<h3 class="boxed">9 March 2009 - Lucene Java 2.4.1 available</h3>
<p>
This release contains fixes for bugs found in 2.4.0,
including one data loss bug
(<a href="https://issues.apache.org/jira/browse/LUCENE-1452">LUCENE-1452</a>)
where in certain situations binary fields would be
truncated to 0 bytes.
</p>
<p>
See <a href="http://lucene.apache.org/java/2_4_1/changes/Changes.html">CHANGES</a> for details.
</p>
<p>
2.4.1 does not contain any new features, API or file format changes,
which makes it fully compatible with 2.4.0.
</p>
<p>
Binary and source distributions are available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<p>
Maven artifacts are available
<a href="http://repo1.maven.org/maven2/org/apache/lucene/">here</a>.
</p>
<a name="N10049"></a><a name="09+February+2009+-+Lucene+at+ApacheCon+Europe+2009+in+Amsterdam"></a>
<h3 class="boxed">09 February 2009 - Lucene at ApacheCon Europe 2009 in Amsterdam</h3>
<p>
<a href="http://www.eu.apachecon.com/c/aceu2009/" title="ApacheCon EU 2009"><img alt="ApacheCon EU 2009 Logo" class="float-right" src="http://www.eu.apachecon.com/page_attachments/0000/0115/125x125_basic.gif"></a>
Lucene will be extremely well represented at
<a href="http://us.apachecon.com/c/acus2008/">ApacheCon EU 2009</a>
in Amsterdam, Netherlands this March 23-27, 2009:
</p>
<ul>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/197">Lucene Boot Camp</a> - A two day training session, March 23 &amp; 24th</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/201">Solr Boot Camp</a> - A one day training session, March 24th</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/136">Introducing Apache Mahout</a> - Grant Ingersoll. March 25th @ 10:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/137">Lucene/Solr Case Studies</a> - Erik Hatcher. March 25th @ 11:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/138">Advanced Indexing Techniques with Apache Lucene</a> - Michael Busch. March 25th @ 14:00</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/251">Apache Solr - A Case Study</a> - Uri Boness. March 26th @ 17:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/250">Best of breed - httpd, forrest, solr and droids</a> - Thorsten Scherler. March 27th @ 17:30</li>
<li>
<a href="http://eu.apachecon.com/c/aceu2009/sessions/165">Apache Droids - an intelligent standalone robot framework</a> - Thorsten Scherler. March 26th @ 15:00</li>
</ul>
<a name="N10092"></a><a name="8+October+2008+-+Lucene+Java+2.4.0+available"></a>
<h3 class="boxed">8 October 2008 - Lucene Java 2.4.0 available</h3>
<p>
This release has many improvements since release 2.3.2, including:
<ul>
<li> New InstantiatedIndex (contrib/instantiated): RAM-based index that
enables much faster searching than RAMDirectory. </li>
<li> New IndexWriter constructors now default autoCommit to false. </li>
<li> New commit() method in IndexWriter lets you control when changes
are made visible and permanent in the index. </li>
<li> A machine or OS crash, or power loss, while IndexWriter is writing
to an index will no longer corrupt the index. </li>
<li> TimeLimitedCollector adds timeout to searches. </li>
<li> Delete documents by Query in IndexWriter. </li>
<li> Pure boolean indexing (no frequency, positions nor payloads are
indexed) using Field.setOmitTf(). </li>
<li> A new Directory implementation, NIOFSDirectory,
using java.nio's APIs to allow multiple threads to
read from the same open file without locking. </li>
<li> IndexWriter.expungeDeletes() reclaims disk space
from deleted documents by merging away segments
that have deletions. </li>
<li> All filters now return a DocIdSet instead of
java.util.BitSet, making filters more efficient and
flexible. </li>
<li> Searching with a Filter is more efficient: now the
filter is applied to a document before scoring is
done. </li>
<li> IndexReader can be opened with new readOnly=true
mode, which gives better performance in a
multi-threaded environment. </li>
</ul>
See <a href="http://lucene.apache.org/java/2_4_0/changes/Changes.html">CHANGES</a> for details.
</p>
<p>
Lucene 2.4.0 includes index format changes that are not
readable by older versions of Lucene. Lucene 2.4.0 can
both read and update older Lucene indexes. Adding to an
index with an older format will cause it to be converted
to the newer format.
</p>
<p>
Binary and source distributions are available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<p>
Maven artifacts are available
<a href="http://repo1.maven.org/maven2/org/apache/lucene/">here</a>.
</p>
<a name="N100D8"></a><a name="06+May+2008+-+Lucene+Java+2.3.2+available"></a>
<h3 class="boxed">06 May 2008 - Lucene Java 2.3.2 available</h3>
<p>
This release contains fixes for bugs found in 2.3.1.
</p>
<p>
See
<a href="http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_3_2/CHANGES.txt">CHANGES.txt</a>
for a detailed listing of changes.
</p>
<p>
2.3.2 does not contain any new features, API or file format changes,
which makes it fully compatible to 2.3.0 and 2.3.1.
</p>
<p>
Binary and source distributions are available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<p>
Maven artifacts are available
<a href="http://repo1.maven.org/maven2/org/apache/lucene/">here</a>.
</p>
<a name="N100FA"></a><a name="23+February+2008+-+Lucene+Java+2.3.1+available"></a>
<h3 class="boxed">23 February 2008 - Lucene Java 2.3.1 available</h3>
<p>
This release contains fixes for serious bugs in 2.3.0 that could cause
index corruptions in <b>autoCommit=false mode</b> or in cases where multiple
threads are adding documents where <b>some have term-vector enabled
fields and some don't</b>. The autoCommit option was added to IndexWriter
with release 2.2.0. If not explicitly set to false, the IndexWriter
runs in autoCommit=true mode.
</p>
<p>
See
<a href="http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_3_1/CHANGES.txt">CHANGES.txt</a>
for a detailed listing of changes.
</p>
<p>
2.3.1 does not contain any new features, API or file format changes,
which makes it fully compatible to 2.3.0.
</p>
<p>
<b>
We would like to encourage everyone who is currently using Lucene Java 2.3.0
to upgrade to 2.3.1 to prevent possible index corruptions!
</b>
</p>
<p>
Binary and source distributions are available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<p>
Maven artifacts are available
<a href="http://repo1.maven.org/maven2/org/apache/lucene/">here</a>.
</p>
<a name="N10126"></a><a name="24+January+2008+-+Lucene+Java+2.3.0+available"></a>
<h3 class="boxed">24 January 2008 - Lucene Java 2.3.0 available</h3>
<p>
This release has many improvements since release 2.2, including:
<ul>
<li>Significantly improved indexing performance</li>
<li>Segment merging in background threads</li>
<li>Refreshable IndexReaders</li>
<li>Faster StandardAnalyzer and improved Token API</li>
<li>TermVectorMapper to customize how term vectors are loaded</li>
<li>Live backups (without pausing indexing) with SnapshotDeletionPolicy</li>
<li>CheckIndex tool to test and recover a corrupt index</li>
<li>Pluggable MergePolicy and MergeScheduler</li>
<li>"Partial" optimize(int maxNumSegments) method</li>
<li>New contrib module for working with Wikipedia content</li>
</ul>
</p>
<p>
In addition Lucene 2.3.0 has many performance
improvements, bug fixes, etc. See
<a href="http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_3_0/CHANGES.txt">CHANGES.txt</a>
for details.
</p>
<p>
Lucene 2.3.0 includes index format changes that are not readable
by older versions of Lucene. Lucene 2.3.0 can both read and update
older Lucene indexes. Adding to an index with an older format
will cause it to be converted to the newer format.
</p>
<p>
Binary and source distributions are available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<p>
Maven artifacts are available
<a href="http://repo1.maven.org/maven2/org/apache/lucene/">here</a>.
</p>
<a name="N10169"></a><a name="23+January+2008+-+Lucene+at+ApacheCon+Europe"></a>
<h3 class="boxed">23 January 2008 - Lucene at ApacheCon Europe</h3>
<p>
<a href="http://www.eu.apachecon.com"><img alt="ApacheCon EU logo" class="float-right" src="http://www.eu.apachecon.com/eu2008/images/buttons/basic_125x125.jpg"></a>
Lucene projects will be well represented at <a href="http://www.eu.apachecon.com">ApacheCon Europe</a> in Amsterdam this year.
Please join us at one or more of the following sessions:
</p>
<ul>
<li>April 7: <a href="http://eu.apachecon.com/eu2008/program/talk/2423">Lucene Boot Camp</a> training by Grant Ingersoll.</li>
<li>April 8: <a href="http://eu.apachecon.com/eu2008/program/talk/2450">Solr Boot Camp</a> training by Erik Hatcher.</li>
<li>April 8: <a href="http://eu.apachecon.com/eu2008/program/talk/2406">Mastering and extending Apache Nutch</a> training by Sami Siren.</li>
<li>April 10: <a href="http://eu.apachecon.com/eu2008/program/talk/2452">Lucene/Solr Case Studies</a> by Erik Hatcher</li>
<li>April 11: <a href="http://eu.apachecon.com/eu2008/program/talk/2413">Apache Lucene Performance</a> by Grant Ingersoll</li>
</ul>
<a name="N101A7"></a><a name="24+December+2007+-+Nightly+Snapshots+available+in+the+Apache+Maven+Snapshot+Repository"></a>
<h3 class="boxed">24 December 2007 - Nightly Snapshots available in the Apache Maven Snapshot Repository</h3>
<p>
We are now publishing nightly artifacts to the <a href="http://people.apache.org/maven-snapshot-repository/org/apache/lucene/">Maven Snapshot Repository</a>. The current version is '2.3-SNAPSHOT'.
</p>
<p>
The artifacts include:
<ul>
<li>Binary jars</li>
<li>Sources</li>
<li>Javadocs</li>
</ul>
You can find separate artifacts for the core, demo, and the different contrib modules.
</p>
<p>
Merry Christmas!
</p>
<a name="N101C7"></a><a name="26+August+2007+-+Lucene+at+ApacheCon+Atlanta"></a>
<h3 class="boxed">26 August 2007 - Lucene at ApacheCon Atlanta</h3>
<p>
<a href="http://www.us.apachecon.com"><img alt="ApacheCon US logo" class="float-right" src="http://www.apache.org/ads/ApacheCon/2007-usa-125x125.png"></a>
Lucene will once again be well represented at ApacheCon USA in Atlanta this November 12-16, 2007.
</p>
<p>The following talks and trainings are scheduled for this year's conference:
<ul>
<li>November 12: <a href="http://us.apachecon.com/us2007/program/talk/1859">Lucene Boot Camp</a> by Grant Ingersoll. An all-day training focusing on getting started with Lucene.</li>
<li>November 16, 9:00 am: <a href="http://us.apachecon.com/us2007/program/talk/1992">Apache Solr out of the Box</a> by Chris Hostetter. Introduction to Solr.</li>
<li>November 16, 10:00 am: <a href="http://us.apachecon.com/us2007/program/talk/1943">Building a Vertical Search Site using Apache Software</a> by Ken Krugler. Will cover many Lucene-based projects.</li>
<li>November 16, 3:00 pm: <a href="http://us.apachecon.com/us2007/program/talk/1953">Apache Lucene Performance</a> by Grant Ingersoll. Tips and techniques for improving Lucene performance.</li>
<li>November 16, 4:00 pm: <a href="http://us.apachecon.com/us2007/program/talk/2017"> Advanced Indexing Techniques with Apache Lucene</a> by Michael Busch. Information on payloads and advanced indexing techniques.</li>
</ul>
</p>
<a name="N10200"></a><a name="19+June+2007+-+Release+2.2+available"></a>
<h3 class="boxed">19 June 2007 - Release 2.2 available</h3>
<p>This release has many improvements since release 2.1. New major features:
<ul>
<li>
<a href="http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/index/IndexWriter.html">"Point-in-time" searching over NFS</a>
</li>
<li>
<a href="http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/search/payloads/package-summary.html">Payloads</a>
</li>
<li>
<a href="http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/search/function/package-summary.html">Function queries</a>
</li>
<li>
<a href="http://lucene.apache.org/java/2_2_0/api/org/apache/lucene/document/Field.html">New API for pre-analyzed fields</a>
</li>
</ul>
In addition Lucene 2.2 has many performance
improvements, bug fixes, etc. See
<a href="http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_2_0/CHANGES.txt">CHANGES.txt</a>
for details.
</p>
<p>Lucene 2.2 includes index format changes that are not readable
by older versions of Lucene. Lucene 2.2 can both read and update
older Lucene indexes. Adding to an index with an older format
will cause it to be converted to the newer format.
</p>
<p>Binary and source distributions are
available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<a name="N10233"></a><a name="18+February+2007+-+Lucene+at+ApacheCon+Europe"></a>
<h3 class="boxed">18 February 2007 - Lucene at ApacheCon Europe</h3>
<p>
<a href="http://www.eu.apachecon.com"><img alt="ApacheCon Europe logo" class="float-right" src="http://www.apache.org/ads/ApacheCon/2007-europe-125x125.png"></a>
Lucene Java and related <a href="http://lucene.apache.org/">Lucene</a> projects will have extensive representation at <a href="http://www.eu.apachecon.com">ApacheCon Europe</a> in Amsterdam this year. For the 2007 session,
Yonik Seeley will be giving the <a href="http://www.eu.apachecon.com/program/talk/11">Full-Text Search with Lucene</a> talk at 10:30 am on May 2nd. Immediately following, Grant Ingersoll
will be presenting <a href="http://www.eu.apachecon.com/program/talk/12">Advanced Lucene</a> at 11:30. Grant will also be leading a full day tutorial session on May 1st titled
<a href="http://www.eu.apachecon.com/program/talk/127">Lucene Boot Camp</a>.
</p>
<p>Lucene related talks include Solr committer Bertrand Delacr&eacute;taz's talk titled <a href="http://www.eu.apachecon.com/program/talk/34">Beyond full-text searches with Solr and Lucene</a> and
Hadoop committer Owen O'Malley's <a href="http://www.eu.apachecon.com/program/talk/36">Introduction to Hadoop</a>.
</p>
<p>Registration is now open on the ApacheCon website.</p>
<a name="N10266"></a><a name="17+February+2007+-+Release+2.1+available"></a>
<h3 class="boxed">17 February 2007 - Release 2.1 available</h3>
<p>This release has many improvements since release
2.0, including new features, performance
improvements, bug fixes, etc. See
<a href="http://svn.apache.org/repos/asf/lucene/java/tags/lucene_2_1_0/CHANGES.txt">CHANGES.txt</a>
for details.
</p>
<p>Lucene 2.1 includes index format changes that are not readable
by older versions of Lucene. Lucene 2.1 can both read and update
older Lucene indexes. Adding to an index with an older format
will cause it to be converted to the newer format.
</p>
<p>Binary and source distributions are
available
<a href="http://www.apache.org/dyn/closer.cgi/lucene/java/">here</a>.
</p>
<a name="N1027E"></a><a name="3+January+2007+-+Nightly+Source+builds+available"></a>
<h3 class="boxed">3 January 2007 - Nightly Source builds available</h3>
<p>Nightly source builds of the current development version of Lucene
are now available at
<a href="http://people.apache.org/builds/lucene/java/nightly/">http://people.apache.org/builds/lucene/java/nightly/</a>. Files are named lucene-DATE-src.tar.gz where DATE is the date of the build.
</p>
</div>
<p>
This is the official documentation for Lucene Java 2.9-dev <BR>
Please use the menu on the left to access the Javadocs and different documents.
</p>
<p>
Additional documentation is available in the <a href="http://wiki.apache.org/lucene-java">Wiki</a>.
</p>
</div>
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