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<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/extensions-and-integrations/spring/spring-data.adoc" target="_blank">Edit</a>
<h1>Apache Ignite With Spring Data</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spring Data Framework provides a unified and widely used API that allows abstracting an underlying data storage from the
application layer. Spring Data helps you avoid locking to a specific database vendor, making it easy to switch from one
database to another with minimal efforts. Apache Ignite integrates with Spring Data by implementing Spring Data <code>CrudRepository</code> interface.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="maven-configuration">Maven Configuration</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The easiest way to start working with Apache Ignite&#8217;s Spring Data repository is by adding the following Maven dependency
to an application&#8217;s <code>pom.xml</code> file:</p>
</div>
<code-tabs><code-tab data-tab='pom.xml'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;dependency&gt;</span>
<span class="nt">&lt;groupId&gt;</span>org.apache.ignite<span class="nt">&lt;/groupId&gt;</span>
<span class="nt">&lt;artifactId&gt;</span>ignite-spring-data_2.2<span class="nt">&lt;/artifactId&gt;</span>
<span class="nt">&lt;version&gt;</span>{ignite.version}<span class="nt">&lt;/version&gt;</span>
<span class="nt">&lt;/dependency&gt;</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<div class="paragraph">
<p>If your Spring Data version is earlier than Spring Data 2.2 then set <code>ignite-spring-data_2.0</code>
or <code>ignite-spring-data</code> as an <code>artifactId</code> in the pom.xml configuration.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="apache-ignite-repository">Apache Ignite Repository</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Apache Ignite introduces a special <code>IgniteRepository</code> interface that extends default <code>CrudRepository</code>. This interface
should be extended by all custom Spring Data repositories that wish to store and query data located in an Apache Ignite cluster.</p>
</div>
<div class="paragraph">
<p>For instance, let&#8217;s create the first custom repository named <code>PersonRepository</code>:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nd">@RepositoryConfig</span><span class="o">(</span><span class="n">cacheName</span> <span class="o">=</span> <span class="s">"PersonCache"</span><span class="o">)</span>
<span class="kd">public</span> <span class="kd">interface</span> <span class="nc">PersonRepository</span> <span class="kd">extends</span> <span class="nc">IgniteRepository</span><span class="o">&lt;</span><span class="nc">Person</span><span class="o">,</span> <span class="nc">Long</span><span class="o">&gt;</span> <span class="o">{</span>
<span class="cm">/**
* Gets all the persons with the given name.
* @param name Person name.
* @return A list of Persons with the given first name.
*/</span>
<span class="kd">public</span> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Person</span><span class="o">&gt;</span> <span class="nf">findByFirstName</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">);</span>
<span class="cm">/**
* Returns top Person with the specified surname.
* @param name Person surname.
* @return Person that satisfy the query.
*/</span>
<span class="kd">public</span> <span class="nc">Cache</span><span class="o">.</span><span class="na">Entry</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">,</span> <span class="nc">Person</span><span class="o">&gt;</span> <span class="nf">findTopByLastNameLike</span><span class="o">(</span><span class="nc">String</span> <span class="n">name</span><span class="o">);</span>
<span class="cm">/**
* Getting ids of all the Person satisfying the custom query from {@link Query} annotation.
*
* @param orgId Query parameter.
* @param pageable Pageable interface.
* @return A list of Persons' ids.
*/</span>
<span class="nd">@Query</span><span class="o">(</span><span class="s">"SELECT id FROM Person WHERE orgId &gt; ?"</span><span class="o">)</span>
<span class="kd">public</span> <span class="nc">List</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">&gt;</span> <span class="nf">selectId</span><span class="o">(</span><span class="kt">long</span> <span class="n">orgId</span><span class="o">,</span> <span class="nc">Pageable</span> <span class="n">pageable</span><span class="o">);</span>
<span class="o">}</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="ulist">
<ul>
<li>
<p><code>@RepositoryConfig</code> annotation should be specified to map a repository to a distributed cache. In the above example, <code>PersonRepository</code> is mapped to <code>PersonCache</code>.</p>
</li>
<li>
<p>Signatures of custom methods like <code>findByFirstName(name)</code> and <code>findTopByLastNameLike(name)</code> will be automatically processed and turned
into SQL queries when methods get executed. In addition, <code>@Query(queryString)</code> annotation can be used if a concrete​ SQL
query needs to be executed as a result of a method call.</p>
</li>
</ul>
</div>
<div class="admonitionblock caution">
<table>
<tr>
<td class="icon">
<div class="title">Caution</div>
</td>
<td class="content">
<h3 id="unsupported-crud-operations" class="discrete">Unsupported CRUD Operations</h3>
<div class="paragraph">
<p>Some operations of CrudRepository interface are not currently supported. These are the operations that do not require providing the key as a parameter:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>save(S entity)</p>
</li>
<li>
<p>save(Iterable&lt;S&gt; entities)</p>
</li>
<li>
<p>delete(T entity)</p>
</li>
<li>
<p>delete(Iterable&lt;? extends T&gt; entities)</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Instead of these operations you can use Ignite specific counterparts available via <code>IgniteRepository</code> interface:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>save(ID key, S entity)</p>
</li>
<li>
<p>save(Map&lt;ID, S&gt; entities)</p>
</li>
<li>
<p>deleteAll(Iterable&lt;ID&gt; ids)</p>
</li>
</ul>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spring-data-and-apache-ignite-configuration">Spring Data and Apache Ignite Configuration</h2>
<div class="sectionbody">
<div class="paragraph">
<p>To enable Apache Ignite backed repositories in Spring Data, mark an application configuration with <code>@EnableIgniteRepositories</code>
annotation, as shown below:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nd">@Configuration</span>
<span class="nd">@EnableIgniteRepositories</span>
<span class="kd">public</span> <span class="kd">class</span> <span class="nc">SpringAppCfg</span> <span class="o">{</span>
<span class="cm">/**
* Creating Apache Ignite instance bean. A bean will be passed
* to IgniteRepositoryFactoryBean to initialize all Ignite based Spring Data repositories and connect to a cluster.
*/</span>
<span class="nd">@Bean</span>
<span class="kd">public</span> <span class="nc">Ignite</span> <span class="nf">igniteInstance</span><span class="o">()</span> <span class="o">{</span>
<span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="c1">// Setting some custom name for the node.</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setIgniteInstanceName</span><span class="o">(</span><span class="s">"springDataNode"</span><span class="o">);</span>
<span class="c1">// Enabling peer-class loading feature.</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setPeerClassLoadingEnabled</span><span class="o">(</span><span class="kc">true</span><span class="o">);</span>
<span class="c1">// Defining and creating a new cache to be used by Ignite Spring Data</span>
<span class="c1">// repository.</span>
<span class="nc">CacheConfiguration</span> <span class="n">ccfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">CacheConfiguration</span><span class="o">(</span><span class="s">"PersonCache"</span><span class="o">);</span>
<span class="c1">// Setting SQL schema for the cache.</span>
<span class="n">ccfg</span><span class="o">.</span><span class="na">setIndexedTypes</span><span class="o">(</span><span class="nc">Long</span><span class="o">.</span><span class="na">class</span><span class="o">,</span> <span class="nc">Person</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setCacheConfiguration</span><span class="o">(</span><span class="n">ccfg</span><span class="o">);</span>
<span class="k">return</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">(</span><span class="n">cfg</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">}</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>The configuration has to instantiate Apache Ignite bean (node) that will be passed to <code>IgniteRepositoryFactoryBean</code>
and will be used by all the Apache Ignite repositories in order to connect to the cluster.</p>
</div>
<div class="paragraph">
<p>In the example above, the bean is initialized directly by the application and is named <code>igniteInstance</code>.
Alternatively, the following beans can be registered in your configuration and an Apache Ignite node will be started automatically:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>IgniteConfiguration</code> object named as <code>igniteCfg</code> bean.</p>
</li>
<li>
<p>A path to Apache Ignite&#8217;s Spring XML configuration named <code>igniteSpringCfgPath</code>.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="using-apache-ignite-repositories">Using Apache Ignite Repositories</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Once all the configurations and repositories are ready to be used, you can register the configuration in an application context and get a reference to the repository.
The following example shows how to register <code>SpringAppCfg</code> - our sample configuration from the section above - in an application context and get a reference to <code>PersonRepository</code>:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="n">ctx</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">AnnotationConfigApplicationContext</span><span class="o">();</span>
<span class="c1">// Explicitly registering Spring configuration.</span>
<span class="n">ctx</span><span class="o">.</span><span class="na">register</span><span class="o">(</span><span class="nc">SpringAppCfg</span><span class="o">.</span><span class="na">class</span><span class="o">);</span>
<span class="n">ctx</span><span class="o">.</span><span class="na">refresh</span><span class="o">();</span>
<span class="c1">// Getting a reference to PersonRepository.</span>
<span class="n">repo</span> <span class="o">=</span> <span class="n">ctx</span><span class="o">.</span><span class="na">getBean</span><span class="o">(</span><span class="nc">PersonRepository</span><span class="o">.</span><span class="na">class</span><span class="o">);</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>Now, you can put data in Ignite using Spring Data API:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">TreeMap</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">,</span> <span class="nc">Person</span><span class="o">&gt;</span> <span class="n">persons</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">TreeMap</span><span class="o">&lt;&gt;();</span>
<span class="n">persons</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="mi">1L</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">(</span><span class="mi">1L</span><span class="o">,</span> <span class="mi">2000L</span><span class="o">,</span> <span class="s">"John"</span><span class="o">,</span> <span class="s">"Smith"</span><span class="o">,</span> <span class="mi">15000</span><span class="o">,</span> <span class="s">"Worked for Apple"</span><span class="o">));</span>
<span class="n">persons</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="mi">2L</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">(</span><span class="mi">2L</span><span class="o">,</span> <span class="mi">2000L</span><span class="o">,</span> <span class="s">"Brad"</span><span class="o">,</span> <span class="s">"Pitt"</span><span class="o">,</span> <span class="mi">16000</span><span class="o">,</span> <span class="s">"Worked for Oracle"</span><span class="o">));</span>
<span class="n">persons</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="mi">3L</span><span class="o">,</span> <span class="k">new</span> <span class="nc">Person</span><span class="o">(</span><span class="mi">3L</span><span class="o">,</span> <span class="mi">1000L</span><span class="o">,</span> <span class="s">"Mark"</span><span class="o">,</span> <span class="s">"Tomson"</span><span class="o">,</span> <span class="mi">10000</span><span class="o">,</span> <span class="s">"Worked for Sun"</span><span class="o">));</span>
<span class="c1">// Adding data into the repository.</span>
<span class="n">repo</span><span class="o">.</span><span class="na">save</span><span class="o">(</span><span class="n">persons</span><span class="o">);</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>To query the data, we can use basic CRUD operations or methods that will be automatically turned into Apache Ignite SQL queries:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">List</span><span class="o">&lt;</span><span class="nc">Person</span><span class="o">&gt;</span> <span class="n">persons</span> <span class="o">=</span> <span class="n">repo</span><span class="o">.</span><span class="na">findByFirstName</span><span class="o">(</span><span class="s">"John"</span><span class="o">);</span>
<span class="k">for</span> <span class="o">(</span><span class="nc">Person</span> <span class="nl">person:</span> <span class="n">persons</span><span class="o">)</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">" &gt;&gt;&gt; "</span> <span class="o">+</span> <span class="n">person</span><span class="o">);</span>
<span class="nc">Cache</span><span class="o">.</span><span class="na">Entry</span><span class="o">&lt;</span><span class="nc">Long</span><span class="o">,</span> <span class="nc">Person</span><span class="o">&gt;</span> <span class="n">topPerson</span> <span class="o">=</span> <span class="n">repo</span><span class="o">.</span><span class="na">findTopByLastNameLike</span><span class="o">(</span><span class="s">"Smith"</span><span class="o">);</span>
<span class="nc">System</span><span class="o">.</span><span class="na">out</span><span class="o">.</span><span class="na">println</span><span class="o">(</span><span class="s">"\n&gt;&gt;&gt; Top Person with surname 'Smith': "</span> <span class="o">+</span>
<span class="n">topPerson</span><span class="o">.</span><span class="na">getValue</span><span class="o">());</span></code></pre>
</div>
</div></code-tab></code-tabs>
</div>
</div>
<div class="sect1">
<h2 id="example">Example</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The complete example is available on link: <a href="https://github.com/apache/ignite-extensions/tree/master/modules/spring-data-2.0-ext/examples/main">GitHub</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="tutorial">Tutorial</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Follow the tutorial that shows how to build a <a href="https://www.gridgain.com/docs/tutorials/spring/spring-ignite-tutorial" target="_blank" rel="noopener">RESTful web service with Apache Ignite and Spring Data</a>.</p>
</div>
</div>
</div>
<div class="copyright">
© 2020 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
</div>
</article>
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<ul class="sectlevel1">
<li><a href="#overview">Overview</a></li>
<li><a href="#maven-configuration">Maven Configuration</a></li>
<li><a href="#apache-ignite-repository">Apache Ignite Repository</a></li>
<li><a href="#spring-data-and-apache-ignite-configuration">Spring Data and Apache Ignite Configuration</a></li>
<li><a href="#using-apache-ignite-repositories">Using Apache Ignite Repositories</a></li>
<li><a href="#example">Example</a></li>
<li><a href="#tutorial">Tutorial</a></li>
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