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Apache Empire-db - Wikipedia
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If notability cannot be shown, the article is likely to be <a href="/wiki/Wikipedia:Merging" title="Wikipedia:Merging">merged</a>, <a href="/wiki/Wikipedia:Redirect" title="Wikipedia:Redirect">redirected</a>, or <a href="/wiki/Wikipedia:Deletion_policy" title="Wikipedia:Deletion policy">deleted</a>.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Apache+Empire-db%22">"Apache Empire-db"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Apache+Empire-db%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Apache+Empire-db%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Apache+Empire-db%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Apache+Empire-db%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Apache+Empire-db%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">March 2022</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">Apache Empire-db</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span typeof="mw:File"><a href="/wiki/File:Apache_Empire-db_Logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/6/68/Apache_Empire-db_Logo.svg/300px-Apache_Empire-db_Logo.svg.png" decoding="async" width="300" height="56" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/68/Apache_Empire-db_Logo.svg/450px-Apache_Empire-db_Logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/68/Apache_Empire-db_Logo.svg/600px-Apache_Empire-db_Logo.svg.png 2x" data-file-width="573" data-file-height="107" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/Apache_Software_Foundation" class="mw-redirect" title="Apache Software Foundation">Apache Software Foundation</a></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">3.0.0 / March 11, 2022<span class="noprint">; 2 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">2022-03-11</span>)</span></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://gitbox.apache.org/repos/asf?p=empire-db.git">EmpireDB Repository</a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Cross-platform" class="mw-redirect" title="Cross-platform">Cross-platform</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Persistence_Framework" class="mw-redirect" title="Persistence Framework">Persistence Framework</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Apache_License_2.0" class="mw-redirect" title="Apache License 2.0">Apache License 2.0</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://empire-db.apache.org/">empire-db<wbr />.apache<wbr />.org</a></span></td></tr></tbody></table> <p><b>Apache Empire-db</b> is a Java library that provides a high level object-oriented API for accessing <a href="/wiki/Relational_database_management_system" class="mw-redirect" title="Relational database management system">relational database management systems</a> (RDBMS) through <a href="/wiki/JDBC" class="mw-redirect" title="JDBC">JDBC</a>. Apache Empire-db is open source and provided under the <a href="/wiki/Apache_License_2.0" class="mw-redirect" title="Apache License 2.0">Apache License 2.0</a> from the <a href="/wiki/Apache_Software_Foundation" class="mw-redirect" title="Apache Software Foundation">Apache Software Foundation</a>. </p><p>Compared to <a href="/wiki/Object-relational_mapping" class="mw-redirect" title="Object-relational mapping">Object-relational mapping</a> (ORM) or other data persistence solutions such as <a href="/wiki/Hibernate_(Java)" class="mw-redirect" title="Hibernate (Java)">Hibernate</a>, <a href="/wiki/IBATIS" class="mw-redirect" title="IBATIS">iBATIS</a> or <a href="/wiki/TopLink" class="mw-redirect" title="TopLink">TopLink</a> Empire-db does not use XML files or Java annotations to provide a mapping of plain (old) Java object (<a href="/wiki/POJO" class="mw-redirect" title="POJO">POJO</a>'s) to database tables, views and columns. Instead Empire-db uses a Java object model to describe the underlying data model and an API that works almost solely with object references rather than <a href="/wiki/String_literal" title="String literal">string literals</a>. </p><p>Empire-db's aim is to provide better software quality and improved maintainability through increased compile-time safety and reduced redundancy of metadata. Additionally applications may benefit from better performance due to full control over <a href="/wiki/SQL" title="SQL">SQL</a> statements and their execution by the developer compared to most OR-mapping solutions.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Major_benefits">Major benefits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Empire-db&action=edit&section=1" title="Edit section: Major benefits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Empire-db's key strength is its API for dynamic SQL generation for arbitrary select, update, insert or delete statements, purely by using Java methods which reference the model objects. This provides type-safety and almost entirely eliminates the use of string literals for names or expressions in code. Additionally DBMS independence is achieved through a pluggable driver model. </p><p>Using references to table and column objects significantly improves compile-time safety and thus reduces the amount of testing. As a positive side effect the IDE's code completion can be used to browse the data model, increases productivity and eliminates the need for other external tools or IDE-plugins. </p><p>Further the object model also provides safe and easy access to meta-information of the data model such as field data type, maximum field length, whether a field is mandatory and a finite choice of options for a field's values. Metadata is user-extensible and not limited to DBMS related metadata. Availability of meta-information encourages more generic code and eliminates redundancies throughout application layers. </p> <div class="mw-heading mw-heading2"><h2 id="Features_at_a_glance">Features at a glance</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Empire-db&action=edit&section=2" title="Edit section: Features at a glance"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Data model definition through a Java object model omits the need to learn XML schemas or annotations and easily allows user interceptions and extensions.</li> <li>Portable RDBMS independent record handling and command definition with support for a variety of relational databases such as <a href="/wiki/Oracle_Database" title="Oracle Database">Oracle</a>, <a href="/wiki/Microsoft_SQL_Server" title="Microsoft SQL Server">Microsoft SQL Server</a>, <a href="/wiki/MySQL" title="MySQL">MySQL</a>, <a href="/wiki/Apache_Derby" title="Apache Derby">Derby</a>, <a href="/wiki/H2_(DBMS)" class="mw-redirect" title="H2 (DBMS)">H2</a> and <a href="/wiki/HSQLDB" title="HSQLDB">HSQLDB</a> (as of version 2.0.5)</li> <li>DDL generation for target DBMS from object definition, either for the entire database or for individual objects such as tables, views, columns and relations.</li> <li>Type-safe API for dynamic SQL command generation allows dynamic building of SQL statements using API methods and object references only instead of string literals. This provides a high degree of type-safety which simplifies testing and maintenance.</li> <li>Reduced amount of Java code and powerful interception of field and metadata access through dynamic beans as an alternative to POJOs. This even allows data model changes (DDL) at runtime.</li> <li>Automatic tracking of record state and field modification (aka "dirty checking") to only insert/ update modified fields.</li> <li>Support for optimistic locking through timestamp column.</li> <li>No need to always work with full database entities. Build queries to provide the data exactly as needed, and obtain the result for example as a list of any type of POJO with matching property setters or constructor.</li> <li>Lightweight and passive library with zero configuration footprint that allows simple integration with any architecture or framework.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Example">Example</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Empire-db&action=edit&section=3" title="Edit section: Example"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>As an example consider a database with two tables called <i>Employees</i> and <i>Departments</i> for which a list of employees in a particular format, with certain constraints and a given order should be retrieved. </p><p>The corresponding Oracle syntax SQL statement is assumed to be as follows: </p> <div class="mw-highlight mw-highlight-lang-sql mw-content-ltr" dir="ltr"><pre><span></span><span class="w"> </span><span class="k">SELECT</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">EMPLOYEE_ID</span><span class="p">,</span><span class="w"> </span> <span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">LASTNAME</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="s1">', '</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">FIRSTNAME</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">NAME</span><span class="p">,</span><span class="w"> </span> <span class="w"> </span><span class="n">t2</span><span class="p">.</span><span class="n">DEPARTMENT</span> <span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="p">(</span><span class="n">EMPLOYEES</span><span class="w"> </span><span class="n">t1</span><span class="w"> </span> <span class="w"> </span><span class="k">INNER</span><span class="w"> </span><span class="k">JOIN</span><span class="w"> </span><span class="n">DEPARTMENTS</span><span class="w"> </span><span class="n">t2</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">DEPARTMENT_ID</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">t2</span><span class="p">.</span><span class="n">DEPARTMENT_ID</span><span class="p">)</span> <span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="k">upper</span><span class="p">(</span><span class="n">t1</span><span class="p">.</span><span class="n">LASTNAME</span><span class="p">)</span><span class="w"> </span><span class="k">LIKE</span><span class="w"> </span><span class="k">upper</span><span class="p">(</span><span class="s1">'Foo%'</span><span class="p">)</span><span class="w"> </span> <span class="w"> </span><span class="k">AND</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">RETIRED</span><span class="o">=</span><span class="mi">0</span> <span class="w"> </span><span class="k">ORDER</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">LASTNAME</span><span class="p">,</span><span class="w"> </span><span class="n">t1</span><span class="p">.</span><span class="n">FIRSTNAME</span> </pre></div> <p>This SQL statement can be created using Empire-db's command API using object model references like this: </p> <div class="mw-highlight mw-highlight-lang-java mw-content-ltr" dir="ltr"><pre><span></span><span class="w"> </span><span class="n">SampleDB</span><span class="w"> </span><span class="n">db</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">getDatabase</span><span class="p">();</span> <span class="w"> </span><span class="c1">// Declare shortcuts (not necessary but convenient)</span> <span class="w"> </span><span class="n">SampleDB</span><span class="p">.</span><span class="na">Employees</span><span class="w"> </span><span class="n">EMP</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">db</span><span class="p">.</span><span class="na">EMPLOYEES</span><span class="p">;</span> <span class="w"> </span><span class="n">SampleDB</span><span class="p">.</span><span class="na">Departments</span><span class="w"> </span><span class="n">DEP</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">db</span><span class="p">.</span><span class="na">DEPARTMENTS</span><span class="p">;</span> <span class="w"> </span><span class="c1">// Create a command object</span> <span class="w"> </span><span class="n">DBCommand</span><span class="w"> </span><span class="n">cmd</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">db</span><span class="p">.</span><span class="na">createCommand</span><span class="p">();</span> <span class="w"> </span><span class="c1">// Select columns</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">select</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">EMPLOYEE_ID</span><span class="p">);</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">select</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">LASTNAME</span><span class="p">.</span><span class="na">append</span><span class="p">(</span><span class="s">", "</span><span class="p">).</span><span class="na">append</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">FIRSTNAME</span><span class="p">).</span><span class="na">as</span><span class="p">(</span><span class="s">"NAME"</span><span class="p">));</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">select</span><span class="p">(</span><span class="n">DEP</span><span class="p">.</span><span class="na">DEPARTMENT</span><span class="p">);</span> <span class="w"> </span><span class="c1">// Join tables</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">join</span><span class="w"> </span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">DEPARTMENT_ID</span><span class="p">,</span><span class="w"> </span><span class="n">DEP</span><span class="p">.</span><span class="na">DEPARTMENT_ID</span><span class="p">);</span> <span class="w"> </span><span class="c1">// Set constraints</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">where</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">LASTNAME</span><span class="p">.</span><span class="na">likeUpper</span><span class="p">(</span><span class="s">"Foo%"</span><span class="p">));</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">where</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">RETIRED</span><span class="p">.</span><span class="na">is</span><span class="p">(</span><span class="kc">false</span><span class="p">));</span> <span class="w"> </span><span class="c1">// Set order</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">orderBy</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">LASTNAME</span><span class="p">);</span> <span class="w"> </span><span class="n">cmd</span><span class="p">.</span><span class="na">orderBy</span><span class="p">(</span><span class="n">EMP</span><span class="p">.</span><span class="na">FIRSTNAME</span><span class="p">);</span> </pre></div> <p>In order to execute the query and retrieve a list of POJO's holding the query result the following code may be used: </p> <div class="mw-highlight mw-highlight-lang-java mw-content-ltr" dir="ltr"><pre><span></span><span class="w"> </span><span class="c1">// Class definition for target objects</span> <span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">EmployeeInfo</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">employeeId</span><span class="p">;</span> <span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">name</span><span class="p">;</span> <span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">department</span><span class="p">;</span> <span class="w"> </span><span class="c1">// Getter's and Setters for all properties</span> <span class="w"> </span><span class="c1">// or a public Constructor using fields</span> <span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">get</span><span class="p">...</span> <span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">set</span><span class="p">...</span> <span class="w"> </span><span class="p">}</span> <span class="w"> </span><span class="c1">// Retrieve employee list using the cmd object created above</span> <span class="w"> </span><span class="n">DBReader</span><span class="w"> </span><span class="n">reader</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">DBReader</span><span class="p">();</span> <span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="n">reader</span><span class="p">.</span><span class="na">open</span><span class="p">(</span><span class="n">cmd</span><span class="p">,</span><span class="w"> </span><span class="n">getConnection</span><span class="p">());</span> <span class="w"> </span><span class="n">List</span><span class="o"><</span><span class="n">EmployeeInfo</span><span class="o">></span><span class="w"> </span><span class="n">empList</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">reader</span><span class="p">.</span><span class="na">getBeanList</span><span class="p">(</span><span class="n">EmployeeInfo</span><span class="p">.</span><span class="na">class</span><span class="p">);</span> <span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">finally</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="n">reader</span><span class="p">.</span><span class="na">close</span><span class="p">()</span> <span class="w"> </span><span class="p">}</span> </pre></div> <p>Empire-db also supports field access through object references or obtaining query results as XML. </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Empire-db&action=edit&section=4" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Empire-db was originally developed at ESTEAM Software a German software development company which used Empire-db to develop various applications for a variety of different branches. </p><p>In January 2008 Empire-db was made officially open source and first published though SourceForge.net. </p><p>In June 2008 a proposal was submitted to the Apache Software Foundation for Empire-db to become an Apache Incubator project. In July 2008 Empire-db got accepted for incubation and all rights over the Software were transferred to the Apache Foundation. </p><p>In October 2008 Empire-db 2.0.4 was the first official Apache incubator release with all package names changed to begin with org.apache.empire. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Apache_Empire-db&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1259569809">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output 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.cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://empire-db.apache.org/pages/home.html">"Apache Empire-db"</a>. <i>empire-db.apache.org</i><span class="reference-accessdate">. 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Software Foundation">The Apache Software Foundation</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Top-level<br />projects</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Accumulo" title="Apache Accumulo">Accumulo</a></li> <li><a href="/wiki/Apache_ActiveMQ" title="Apache ActiveMQ">ActiveMQ</a></li> <li><a href="/wiki/Apache_Airavata" title="Apache Airavata">Airavata</a></li> <li><a href="/wiki/Apache_Airflow" title="Apache Airflow">Airflow</a></li> <li><a href="/wiki/Apache_Allura" title="Apache Allura">Allura</a></li> <li><a href="/wiki/Apache_Ambari" class="mw-redirect" title="Apache Ambari">Ambari</a></li> <li><a href="/wiki/Apache_Ant" title="Apache Ant">Ant</a></li> <li><a href="/wiki/Apache_Aries" title="Apache Aries">Aries</a></li> <li><a href="/wiki/Apache_Arrow" title="Apache Arrow">Arrow</a></li> <li><a href="/wiki/Apache_HTTP_Server" title="Apache HTTP Server">Apache HTTP Server</a></li> <li><a href="/wiki/Apache_Portable_Runtime" title="Apache Portable Runtime">APR</a></li> <li><a href="/wiki/Apache_Avro" title="Apache Avro">Avro</a></li> <li><a href="/wiki/Apache_Axis" title="Apache Axis">Axis</a></li> <li><a href="/wiki/Apache_Axis2" title="Apache Axis2">Axis2</a></li> <li><a href="/wiki/Apache_Beam" title="Apache Beam">Beam</a></li> <li><a href="/wiki/Apache_Bloodhound" class="mw-redirect" title="Apache Bloodhound">Bloodhound</a></li> <li><a href="/wiki/Apache_Brooklyn" title="Apache Brooklyn">Brooklyn</a></li> <li><a href="/wiki/Apache_Calcite" title="Apache Calcite">Calcite</a></li> <li><a href="/wiki/Apache_Camel" title="Apache Camel">Camel</a></li> <li><a href="/wiki/Apache_CarbonData" title="Apache CarbonData">CarbonData</a></li> <li><a href="/wiki/Apache_Cassandra" title="Apache Cassandra">Cassandra</a></li> <li><a href="/wiki/Apache_Cayenne" title="Apache Cayenne">Cayenne</a></li> <li><a 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href="/wiki/Apache_Flume" class="mw-redirect" title="Apache Flume">Flume</a></li> <li><a href="/wiki/FreeMarker" title="FreeMarker">FreeMarker</a></li> <li><a href="/wiki/Apache_Geronimo" title="Apache Geronimo">Geronimo</a></li> <li><a href="/wiki/Apache_Groovy" title="Apache Groovy">Groovy</a></li> <li><a href="/wiki/Apache_Guacamole" title="Apache Guacamole">Guacamole</a></li> <li><a href="/wiki/Apache_Gump" title="Apache Gump">Gump</a></li> <li><a href="/wiki/Apache_Hadoop" title="Apache Hadoop">Hadoop</a></li> <li><a href="/wiki/Apache_HBase" title="Apache HBase">HBase</a></li> <li><a href="/wiki/Apache_Helix" title="Apache Helix">Helix</a></li> <li><a href="/wiki/Apache_Hive" title="Apache Hive">Hive</a></li> <li><a href="/wiki/Apache_Iceberg" title="Apache Iceberg">Iceberg</a></li> <li><a href="/wiki/Apache_Ignite" title="Apache Ignite">Ignite</a></li> <li><a href="/wiki/Apache_Impala" title="Apache Impala">Impala</a></li> <li><a href="/wiki/Apache_Jackrabbit" title="Apache Jackrabbit">Jackrabbit</a></li> <li><a href="/wiki/Apache_James" title="Apache James">James</a></li> <li><a href="/wiki/Apache_Jena" title="Apache Jena">Jena</a></li> <li><a href="/wiki/Apache_JMeter" title="Apache JMeter">JMeter</a></li> <li><a href="/wiki/Apache_Kafka" title="Apache Kafka">Kafka</a></li> <li><a href="/wiki/Apache_Kudu" title="Apache Kudu">Kudu</a></li> <li><a href="/wiki/Apache_Kylin" title="Apache Kylin">Kylin</a></li> <li><a href="/wiki/Apache_Lucene" title="Apache Lucene">Lucene</a></li> <li><a href="/wiki/Apache_Mahout" title="Apache Mahout">Mahout</a></li> <li><a href="/wiki/Apache_Maven" title="Apache Maven">Maven</a></li> <li><a href="/wiki/Apache_MINA" title="Apache MINA">MINA</a></li> <li><a href="/wiki/Mod_perl" title="Mod perl">mod_perl</a></li> <li><a href="/wiki/Apache_MyFaces" title="Apache MyFaces">MyFaces</a></li> <li><a href="/wiki/Apache_Mynewt" title="Apache Mynewt">Mynewt</a></li> <li><a href="/wiki/Apache_NiFi" title="Apache NiFi">NiFi</a></li> <li><a href="/wiki/NetBeans" title="NetBeans">NetBeans</a></li> <li><a href="/wiki/Apache_Nutch" title="Apache Nutch">Nutch</a></li> <li><a href="/wiki/NuttX" title="NuttX">NuttX</a></li> <li><a href="/wiki/Apache_OFBiz" title="Apache OFBiz">OFBiz</a></li> <li><a href="/wiki/Apache_Oozie" title="Apache Oozie">Oozie</a></li> <li><a href="/wiki/Apache_OpenEJB" title="Apache OpenEJB">OpenEJB</a></li> <li><a href="/wiki/Apache_OpenJPA" title="Apache OpenJPA">OpenJPA</a></li> <li><a href="/wiki/Apache_OpenNLP" title="Apache OpenNLP">OpenNLP</a></li> <li><a href="/wiki/Apache_OpenOffice" title="Apache OpenOffice">OрenOffice</a></li> <li><a href="/wiki/Apache_ORC" title="Apache ORC">ORC</a></li> <li><a href="/wiki/Apache_PDFBox" title="Apache PDFBox">PDFBox</a></li> <li><a href="/wiki/Apache_Parquet" title="Apache Parquet">Parquet</a></li> <li><a href="/wiki/Apache_Phoenix" title="Apache Phoenix">Phoenix</a></li> <li><a href="/wiki/Apache_POI" title="Apache POI">POI</a></li> <li><a href="/wiki/Apache_Pig" title="Apache Pig">Pig</a></li> <li><a href="/wiki/Apache_Pinot" title="Apache Pinot">Pinot</a></li> <li><a href="/wiki/Apache_Pivot" title="Apache Pivot">Pivot</a></li> <li><a href="/wiki/Apache_Qpid" title="Apache Qpid">Qpid</a></li> <li><a href="/wiki/Apache_Roller" title="Apache Roller">Roller</a></li> <li><a href="/wiki/Apache_RocketMQ" title="Apache RocketMQ">RocketMQ</a></li> <li><a href="/wiki/Apache_Samza" title="Apache Samza">Samza</a></li> <li><a href="/wiki/Apache_Shiro" title="Apache Shiro">Shiro</a></li> <li><a href="/wiki/Apache_SINGA" title="Apache SINGA">SINGA</a></li> <li><a href="/wiki/Apache_Sling" title="Apache Sling">Sling</a></li> <li><a href="/wiki/Apache_Solr" title="Apache Solr">Solr</a></li> <li><a href="/wiki/Apache_Spark" title="Apache Spark">Spark</a></li> <li><a href="/wiki/Apache_Storm" title="Apache Storm">Storm</a></li> <li><a href="/wiki/Apache_SpamAssassin" title="Apache SpamAssassin">SpamAssassin</a></li> <li><a href="/wiki/Apache_Struts" title="Apache Struts">Struts</a> <ul><li><a href="/wiki/Apache_Struts_1" title="Apache Struts 1">1</a></li></ul></li> <li><a href="/wiki/Apache_Subversion" title="Apache Subversion">Subversion</a></li> <li><a href="/wiki/Apache_Superset" title="Apache Superset">Superset</a></li> <li><a href="/wiki/Apache_SystemDS" title="Apache SystemDS">SystemDS</a></li> <li><a href="/wiki/Apache_Tapestry" title="Apache Tapestry">Tapestry</a></li> <li><a href="/wiki/Apache_Thrift" title="Apache Thrift">Thrift</a></li> <li><a href="/wiki/Apache_Tika" title="Apache Tika">Tika</a></li> <li><a href="/wiki/Apache_TinkerPop" class="mw-redirect" title="Apache TinkerPop">TinkerPop</a></li> <li><a href="/wiki/Apache_Tomcat" title="Apache Tomcat">Tomcat</a></li> <li><a href="/wiki/Apache_Trafodion" class="mw-redirect" title="Apache Trafodion">Trafodion</a></li> <li><a href="/wiki/Apache_Traffic_Server" title="Apache Traffic Server">Traffic Server</a></li> <li><a href="/wiki/UIMA" title="UIMA">UIMA</a></li> <li><a href="/wiki/Apache_Velocity" title="Apache Velocity">Velocity</a></li> <li><a href="/wiki/Apache_Wicket" title="Apache Wicket">Wicket</a></li> <li><a href="/wiki/Apache_Xalan" title="Apache Xalan">Xalan</a></li> <li><a href="/wiki/Apache_Xerces" title="Apache Xerces">Xerces</a></li> <li><a href="/wiki/Apache_XMLBeans" title="Apache XMLBeans">XMLBeans</a></li> <li>Yetus</li> <li><a href="/wiki/Apache_ZooKeeper" title="Apache ZooKeeper">ZooKeeper</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Apache_Commons" title="Apache Commons">Commons</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Byte_Code_Engineering_Library" title="Byte Code Engineering Library">BCEL</a></li> <li><a href="/wiki/Bean_Scripting_Framework" title="Bean Scripting Framework">BSF</a></li> <li><a href="/wiki/Commons_Daemon" title="Commons Daemon">Daemon</a></li> <li><a href="/wiki/Apache_Jelly" title="Apache Jelly">Jelly</a></li> <li><a href="/wiki/Apache_Commons_Logging" title="Apache Commons Logging">Logging</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Incubator</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Taverna" title="Apache Taverna">Taverna</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other projects</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Batik" title="Apache Batik">Batik</a></li> <li><a href="/wiki/Apache_FOP_(Formatting_Objects_Processor)" class="mw-redirect" title="Apache FOP (Formatting Objects Processor)">FOP</a></li> <li><a href="/wiki/Apache_Ivy" title="Apache Ivy">Ivy</a></li> <li><a href="/wiki/Log4j" title="Log4j">Log4j</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Attic</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Apex" title="Apache Apex">Apex</a></li> <li><a href="/wiki/AxKit" title="AxKit">AxKit</a></li> <li><a href="/wiki/Apache_Beehive" title="Apache Beehive">Beehive</a></li> <li><a href="/wiki/Apache_iBATIS" title="Apache iBATIS">iBATIS</a></li> <li><a href="/wiki/Apache_Click" title="Apache Click">Click</a></li> <li><a href="/wiki/Apache_Continuum" title="Apache Continuum">Continuum</a></li> <li><a href="/wiki/Deltacloud" title="Deltacloud">Deltacloud</a></li> <li><a href="/wiki/Etch_(protocol)" title="Etch (protocol)">Etch</a></li> <li><a href="/wiki/Apache_Giraph" title="Apache Giraph">Giraph</a></li> <li><a href="/wiki/Apache_Hama" title="Apache Hama">Hama</a></li> <li><a href="/wiki/Apache_Harmony" title="Apache Harmony">Harmony</a></li> <li><a href="/wiki/Jakarta_Project" title="Jakarta Project">Jakarta</a></li> <li><a href="/wiki/Apache_Marmotta" title="Apache Marmotta">Marmotta</a></li> <li><a href="/wiki/Apache_MXNet" title="Apache MXNet">MXNet</a></li> <li><a href="/wiki/Apache_ODE" title="Apache ODE">ODE</a></li> <li><a href="/wiki/Jini" title="Jini">River</a></li> <li><a href="/wiki/Apache_Shale" title="Apache Shale">Shale</a></li> <li><a href="/wiki/Jakarta_Slide" class="mw-redirect" title="Jakarta Slide">Slide</a></li> <li><a href="/wiki/Sqoop" title="Sqoop">Sqoop</a></li> <li><a href="/wiki/Apache_Stanbol" title="Apache Stanbol">Stanbol</a></li> <li><a href="/wiki/Apache_Tuscany" class="mw-redirect" title="Apache Tuscany">Tuscany</a></li> <li><a href="/wiki/Apache_Wave" class="mw-redirect" title="Apache Wave">Wave</a></li> <li><a href="/wiki/Apache_XML" title="Apache XML">XML</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Licenses</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_License" title="Apache License">Apache License</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Apache_Software_Foundation" title="Category:Apache Software Foundation">Category</a></b></li></ul> 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