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| class='' |
| >Benchmarking With Yardstick</a> |
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| <div class="left-nav__overlay"></div> |
| |
| |
| <article data-swiftype-index='true'> |
| <a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/data-modeling/binary-marshaller.adoc" target="_blank">Edit</a> |
| |
| <h1>Binary Marshaller</h1> |
| |
| <div class="sect1"> |
| <h2 id="basic-concepts">Basic Concepts</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Binary Marshaller is a component of Ignite that is responsible for data serialization. It has the advantages:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>It enables you to read an arbitrary field from an object’s serialized form without full object deserialization. |
| This ability completely removes the requirement to have the cache key and value classes deployed on the server node’s classpath.</p> |
| </li> |
| <li> |
| <p>It enables you to add and remove fields from objects of the same type. Given that server nodes do not have model classes |
| definitions, this ability allows dynamic change to an object’s structure, and even allows multiple clients with different versions of class definitions to co-exist.</p> |
| </li> |
| <li> |
| <p>It enables you to construct new objects based on a type name without having class definitions at all, hence |
| allowing dynamic type creation.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>Binary objects can be used only when the default binary marshaller is used (i.e. no other marshaller is set to the configuration explicitly).</p> |
| </div> |
| <div class="admonitionblock note"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Note</div> |
| </td> |
| <td class="content"> |
| <h3 id="restrictions" class="discrete">Restrictions</h3> |
| <div class="paragraph"> |
| <p>There are several restrictions that are implied by the BinaryObject format implementation:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Internally, Ignite does not write field and type names but uses a lower-case name hash to identify a field or a type. |
| It means that fields or types with the same name hash are not allowed. Even though serialization will not work out-of-the-box |
| in the case of hash collision, Ignite provides a way to resolve this collision at the configuration level.</p> |
| </li> |
| <li> |
| <p>For the same reason, BinaryObject format does not allow identical field names on different levels of a class hierarchy.</p> |
| </li> |
| <li> |
| <p>If a class implements <code>Externalizable</code> interface, Ignite will use <code>OptimizedMarshaller</code> instead of the binary one. |
| The <code>OptimizedMarshaller</code> uses <code>writeExternal()</code> and <code>readExternal()</code> methods to serialize and deserialize objects of |
| this class which requires adding classes of <code>Externalizable</code> objects to the classpath of server nodes.</p> |
| </li> |
| </ul> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="paragraph"> |
| <p>The <code>IgniteBinary</code> facade, which can be obtained from an instance of Ignite, contains all the necessary methods to work with binary objects.</p> |
| </div> |
| <div class="admonitionblock note"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Note</div> |
| </td> |
| <td class="content"> |
| <h3 id="automatic-hash-code-calculation-and-equals-implementation" class="discrete">Automatic Hash Code Calculation and Equals Implementation</h3> |
| <div class="paragraph"> |
| <p>There are several restrictions that are implied by the BinaryObject format implementation:</p> |
| </div> |
| <div class="paragraph"> |
| <p>If an object can be serialized into a binary form, then Ignite will calculate its hash code during serialization and |
| write it to the resulting binary array. Also, Ignite provides a custom implementation of the equals method for the binary |
| object’s comparison needs. This means that you do not need to override the GetHashCode and Equals methods of your custom |
| keys and values in order for them to be used in Ignite, unless they can not be serialized into the binary form. |
| For instance, objects of <code>Externalizable</code> type cannot be serialized into the binary form and require you to implement |
| the <code>hashCode</code> and <code>equals</code> methods manually. See Restrictions section above for more details.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="configuring-binary-objects">Configuring Binary Objects</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In the vast majority of use cases, there is no need to additionally configure binary objects.</p> |
| </div> |
| <div class="paragraph"> |
| <p>However, in a case when you need to override the default type and field IDs calculation, or to plug in <code>BinarySerializer</code>, |
| a <code>BinaryConfiguration</code> object should be defined in <code>IgniteConfiguration</code>. This object allows specifying a global |
| name mapper, a global ID mapper, and a global binary serializer as well as per-type mappers and serializers. Wildcards |
| are supported for per-type configuration, in which case, the provided configuration will be applied to all types |
| that match the type name template.</p> |
| </div> |
| <code-tabs><code-tab data-tab='XML'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="xml"><span class="nt"><bean</span> <span class="na">id=</span><span class="s">"ignite.cfg"</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">></span> |
| |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"binaryConfiguration"</span><span class="nt">></span> |
| <span class="nt"><bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.BinaryConfiguration"</span><span class="nt">></span> |
| |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"nameMapper"</span> <span class="na">ref=</span><span class="s">"globalNameMapper"</span><span class="nt">/></span> |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"idMapper"</span> <span class="na">ref=</span><span class="s">"globalIdMapper"</span><span class="nt">/></span> |
| |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"typeConfigurations"</span><span class="nt">></span> |
| <span class="nt"><list></span> |
| <span class="nt"><bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.binary.BinaryTypeConfiguration"</span><span class="nt">></span> |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"typeName"</span> <span class="na">value=</span><span class="s">"org.apache.ignite.examples.*"</span><span class="nt">/></span> |
| <span class="nt"><property</span> <span class="na">name=</span><span class="s">"serializer"</span> <span class="na">ref=</span><span class="s">"exampleSerializer"</span><span class="nt">/></span> |
| <span class="nt"></bean></span> |
| <span class="nt"></list></span> |
| <span class="nt"></property></span> |
| <span class="nt"></bean></span> |
| <span class="nt"></property></span> |
| <span class="nt"></bean></span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="binaryobject-api">BinaryObject API</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>By default, Ignite works with deserialized values as it is the most common use case. To enable <code>BinaryObject</code> |
| processing, a user needs to obtain an instance of <code>IgniteCache</code> using the <code>withKeepBinary()</code> method. When enabled, |
| this flag will ensure that objects returned from the cache will be in <code>BinaryObject</code> format, when possible. The same |
| applies to values being passed to the <code>EntryProcessor</code> and <code>CacheInterceptor</code>.</p> |
| </div> |
| <div class="admonitionblock note"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Note</div> |
| </td> |
| <td class="content"> |
| <h3 id="platform-types" class="discrete">Platform Types</h3> |
| <div class="paragraph"> |
| <p>Note that not all types will be represented as <code>BinaryObject</code> when the <code>withKeepBinary()</code> flag is enabled. There is a |
| set of 'platform' types that includes primitive types, String, UUID, Date, Timestamp, BigDecimal, Collections, |
| Maps and arrays of these that will never be represented as a <code>BinaryObject</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Note that in the example below key type Integer does not change because it is a platform type.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <code-tabs><code-tab data-tab='Java'><div class="listingblock"> |
| <div class="content"> |
| <pre class="rouge highlight"><code data-lang="java"><span class="c1">// Create a regular Person object and put it to the cache.</span> |
| <span class="nc">Person</span> <span class="n">person</span> <span class="o">=</span> <span class="n">buildPerson</span><span class="o">(</span><span class="n">personId</span><span class="o">);</span> |
| <span class="n">ignite</span><span class="o">.</span><span class="na">cache</span><span class="o">(</span><span class="s">"myCache"</span><span class="o">).</span><span class="na">put</span><span class="o">(</span><span class="n">personId</span><span class="o">,</span> <span class="n">person</span><span class="o">);</span> |
| |
| <span class="c1">// Get an instance of binary-enabled cache.</span> |
| <span class="nc">IgniteCache</span><span class="o"><</span><span class="nc">Integer</span><span class="o">,</span> <span class="nc">BinaryObject</span><span class="o">></span> <span class="n">binaryCache</span> <span class="o">=</span> <span class="n">ignite</span><span class="o">.</span><span class="na">cache</span><span class="o">(</span><span class="s">"myCache"</span><span class="o">).</span><span class="na">withKeepBinary</span><span class="o">();</span> |
| |
| <span class="c1">// Get the above person object in the BinaryObject format.</span> |
| <span class="nc">BinaryObject</span> <span class="n">binaryPerson</span> <span class="o">=</span> <span class="n">binaryCache</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">personId</span><span class="o">);</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="modifying-binary-objects-using-binaryobjectbuilder">Modifying Binary Objects Using BinaryObjectBuilder</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><code>BinaryObject</code> instances are immutable. An instance of <code>BinaryObjectBuilder</code> must be used in order to update fields and |
| create a new <code>BinaryObject</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>An instance of <code>BinaryObjectBuilder</code> can be obtained from <code>IgniteBinary</code> facade. The builder may be created using a type |
| name, in this case the returned builder will contain no fields, or it may be created using an existing <code>BinaryObject</code>, |
| in this case the returned builder will copy all the fields from the given <code>BinaryObject</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Another way to get an instance of <code>BinaryObjectBuilder</code> is to call <code>toBuilder()</code> on an existing instance of a <code>BinaryObject</code>. |
| This will also copy all data from the <code>BinaryObject</code> to the created builder.</p> |
| </div> |
| <div class="admonitionblock note"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <div class="title">Note</div> |
| </td> |
| <td class="content"> |
| <h3 id="limitations" class="discrete">Limitations</h3> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>You cannot change the types of existing fields.</p> |
| </li> |
| <li> |
| <p>You cannot change the order of enum values or add new constants at the beginning or in the middle of the list of enum’s |
| values. You can add new constants to the end of the list though.</p> |
| </li> |
| </ul> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="paragraph"> |
| <p>Below is an example of using the <code>BinaryObject</code> API to process data on server nodes without having user classes deployed |
| on servers and without actual data deserialization.</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="c1">// The EntryProcessor is to be executed for this key.</span> |
| <span class="kt">int</span> <span class="n">key</span> <span class="o">=</span> <span class="mi">101</span><span class="o">;</span> |
| |
| <span class="n">cache</span><span class="o">.<</span><span class="nc">Integer</span><span class="o">,</span> <span class="nc">BinaryObject</span><span class="o">></span><span class="n">withKeepBinary</span><span class="o">().</span><span class="na">invoke</span><span class="o">(</span> |
| <span class="n">key</span><span class="o">,</span> <span class="k">new</span> <span class="nc">CacheEntryProcessor</span><span class="o"><</span><span class="nc">Integer</span><span class="o">,</span> <span class="nc">BinaryObject</span><span class="o">,</span> <span class="nc">Object</span><span class="o">>()</span> <span class="o">{</span> |
| <span class="kd">public</span> <span class="nc">Object</span> <span class="nf">process</span><span class="o">(</span><span class="nc">MutableEntry</span><span class="o"><</span><span class="nc">Integer</span><span class="o">,</span> <span class="nc">BinaryObject</span><span class="o">></span> <span class="n">entry</span><span class="o">,</span> |
| <span class="nc">Object</span><span class="o">...</span> <span class="n">objects</span><span class="o">)</span> <span class="kd">throws</span> <span class="nc">EntryProcessorException</span> <span class="o">{</span> |
| <span class="c1">// Create builder from the old value.</span> |
| <span class="nc">BinaryObjectBuilder</span> <span class="n">bldr</span> <span class="o">=</span> <span class="n">entry</span><span class="o">.</span><span class="na">getValue</span><span class="o">().</span><span class="na">toBuilder</span><span class="o">();</span> |
| |
| <span class="c1">//Update the field in the builder.</span> |
| <span class="n">bldr</span><span class="o">.</span><span class="na">setField</span><span class="o">(</span><span class="s">"name"</span><span class="o">,</span> <span class="s">"Ignite"</span><span class="o">);</span> |
| |
| <span class="c1">// Set new value to the entry.</span> |
| <span class="n">entry</span><span class="o">.</span><span class="na">setValue</span><span class="o">(</span><span class="n">bldr</span><span class="o">.</span><span class="na">build</span><span class="o">());</span> |
| |
| <span class="k">return</span> <span class="kc">null</span><span class="o">;</span> |
| <span class="o">}</span> |
| <span class="o">});</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="binaryobject-type-metadata">BinaryObject Type Metadata</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>As it was mentioned above, binary object structure may be changed at runtime hence it may also be useful to get |
| information about a particular type that is stored in a cache such as field names, field type names, and affinity |
| field name. Ignite facilitates this requirement via the <code>BinaryType</code> interface.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This interface also introduces a faster version of field getter called <code>BinaryField</code>. The concept is similar to java |
| reflection and allows to cache certain information about the field being read in the <code>BinaryField</code> instance, which is |
| useful when reading the same field from a large collection of binary objects.</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">Collection</span><span class="o"><</span><span class="nc">BinaryObject</span><span class="o">></span> <span class="n">persons</span> <span class="o">=</span> <span class="n">getPersons</span><span class="o">();</span> |
| |
| <span class="nc">BinaryField</span> <span class="n">salary</span> <span class="o">=</span> <span class="kc">null</span><span class="o">;</span> |
| |
| <span class="kt">double</span> <span class="n">total</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> |
| <span class="kt">int</span> <span class="n">cnt</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> |
| |
| <span class="k">for</span> <span class="o">(</span><span class="nc">BinaryObject</span> <span class="n">person</span> <span class="o">:</span> <span class="n">persons</span><span class="o">)</span> <span class="o">{</span> |
| <span class="k">if</span> <span class="o">(</span><span class="n">salary</span> <span class="o">==</span> <span class="kc">null</span><span class="o">)</span> |
| <span class="n">salary</span> <span class="o">=</span> <span class="n">person</span><span class="o">.</span><span class="na">type</span><span class="o">().</span><span class="na">field</span><span class="o">(</span><span class="s">"salary"</span><span class="o">);</span> |
| |
| <span class="n">total</span> <span class="o">+=</span> <span class="n">salary</span><span class="o">.</span><span class="na">value</span><span class="o">(</span><span class="n">person</span><span class="o">);</span> |
| <span class="n">cnt</span><span class="o">++;</span> |
| <span class="o">}</span> |
| |
| <span class="kt">double</span> <span class="n">avg</span> <span class="o">=</span> <span class="n">total</span> <span class="o">/</span> <span class="n">cnt</span><span class="o">;</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="binaryobject-and-cachestore">BinaryObject and CacheStore</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Setting <code>withKeepBinary()</code> on the cache API does not affect the way user objects are passed to a <code>CacheStore</code>. This is |
| intentional because in most cases a single <code>CacheStore</code> implementation works either with deserialized classes, or with |
| <code>BinaryObject</code> representations. To control the way objects are passed to the store, the <code>storeKeepBinary</code> flag on |
| <code>CacheConfiguration</code> should be used. When this flag is set to <code>false</code>, deserialized values will be passed to the store, |
| otherwise <code>BinaryObject</code> representations will be used.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Below is an example pseudo-code implementation of a store working with <code>BinaryObject</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="kd">public</span> <span class="kd">class</span> <span class="nc">CacheExampleBinaryStore</span> <span class="kd">extends</span> <span class="nc">CacheStoreAdapter</span><span class="o"><</span><span class="nc">Integer</span><span class="o">,</span> <span class="nc">BinaryObject</span><span class="o">></span> <span class="o">{</span> |
| <span class="nd">@IgniteInstanceResource</span> |
| <span class="kd">private</span> <span class="nc">Ignite</span> <span class="n">ignite</span><span class="o">;</span> |
| |
| <span class="cm">/** {@inheritDoc} */</span> |
| <span class="nd">@Override</span> <span class="kd">public</span> <span class="nc">BinaryObject</span> <span class="nf">load</span><span class="o">(</span><span class="nc">Integer</span> <span class="n">key</span><span class="o">)</span> <span class="o">{</span> |
| <span class="nc">IgniteBinary</span> <span class="n">binary</span> <span class="o">=</span> <span class="n">ignite</span><span class="o">.</span><span class="na">binary</span><span class="o">();</span> |
| |
| <span class="nc">List</span><span class="o"><?></span> <span class="n">rs</span> <span class="o">=</span> <span class="n">loadRow</span><span class="o">(</span><span class="n">key</span><span class="o">);</span> |
| |
| <span class="nc">BinaryObjectBuilder</span> <span class="n">bldr</span> <span class="o">=</span> <span class="n">binary</span><span class="o">.</span><span class="na">builder</span><span class="o">(</span><span class="s">"Person"</span><span class="o">);</span> |
| |
| <span class="k">for</span> <span class="o">(</span><span class="kt">int</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span><span class="o">;</span> <span class="n">i</span> <span class="o"><</span> <span class="n">rs</span><span class="o">.</span><span class="na">size</span><span class="o">();</span> <span class="n">i</span><span class="o">++)</span> |
| <span class="n">bldr</span><span class="o">.</span><span class="na">setField</span><span class="o">(</span><span class="n">name</span><span class="o">(</span><span class="n">i</span><span class="o">),</span> <span class="n">rs</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">i</span><span class="o">));</span> |
| |
| <span class="k">return</span> <span class="n">bldr</span><span class="o">.</span><span class="na">build</span><span class="o">();</span> |
| <span class="o">}</span> |
| |
| <span class="cm">/** {@inheritDoc} */</span> |
| <span class="nd">@Override</span> <span class="kd">public</span> <span class="kt">void</span> <span class="nf">write</span><span class="o">(</span><span class="nc">Cache</span><span class="o">.</span><span class="na">Entry</span><span class="o"><?</span> <span class="kd">extends</span> <span class="nc">Integer</span><span class="o">,</span> <span class="o">?</span> <span class="kd">extends</span> <span class="nc">BinaryObject</span><span class="o">></span> <span class="n">entry</span><span class="o">)</span> <span class="o">{</span> |
| <span class="nc">BinaryObject</span> <span class="n">obj</span> <span class="o">=</span> <span class="n">entry</span><span class="o">.</span><span class="na">getValue</span><span class="o">();</span> |
| |
| <span class="nc">BinaryType</span> <span class="n">type</span> <span class="o">=</span> <span class="n">obj</span><span class="o">.</span><span class="na">type</span><span class="o">();</span> |
| |
| <span class="nc">Collection</span><span class="o"><</span><span class="nc">String</span><span class="o">></span> <span class="n">fields</span> <span class="o">=</span> <span class="n">type</span><span class="o">.</span><span class="na">fieldNames</span><span class="o">();</span> |
| |
| <span class="nc">List</span><span class="o"><</span><span class="nc">Object</span><span class="o">></span> <span class="n">row</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">ArrayList</span><span class="o"><>(</span><span class="n">fields</span><span class="o">.</span><span class="na">size</span><span class="o">());</span> |
| |
| <span class="k">for</span> <span class="o">(</span><span class="nc">String</span> <span class="n">fieldName</span> <span class="o">:</span> <span class="n">fields</span><span class="o">)</span> |
| <span class="n">row</span><span class="o">.</span><span class="na">add</span><span class="o">(</span><span class="n">obj</span><span class="o">.</span><span class="na">field</span><span class="o">(</span><span class="n">fieldName</span><span class="o">));</span> |
| |
| <span class="n">saveRow</span><span class="o">(</span><span class="n">entry</span><span class="o">.</span><span class="na">getKey</span><span class="o">(),</span> <span class="n">row</span><span class="o">);</span> |
| <span class="o">}</span> |
| <span class="o">}</span></code></pre> |
| </div> |
| </div></code-tab></code-tabs> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="binary-name-mapper-and-binary-id-mapper">Binary Name Mapper and Binary ID Mapper</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Internally, Ignite never writes full strings for field or type names. Instead, for performance reasons, Ignite writes |
| integer hash codes for type and field names. Testing has indicated that hash code conflicts for the type names or the |
| field names within the same type are virtually non-existent and, to gain performance, it is safe to work with hash codes. |
| For the cases when hash codes for different types or fields actually do collide, <code>BinaryNameMapper</code> and <code>BinaryIdMapper</code> |
| support overriding the automatically generated hash code IDs for the type and field names.</p> |
| </div> |
| <div class="paragraph"> |
| <p><code>BinaryNameMapper</code> - maps type/class and field names to different names. |
| <code>BinaryIdMapper</code> - maps given from <code>BinaryNameMapper</code> type and field name to ID that will be used by Ignite in internals.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Ignite provides the following out-of-the-box mappers implementation:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>BinaryBasicNameMapper</code> - a basic implementation of <code>BinaryNameMapper</code> that returns a full or a simple name of a given |
| class depending on whether the <code>setSimpleName(boolean useSimpleName)</code> property is set.</p> |
| </li> |
| <li> |
| <p><code>BinaryBasicIdMapper</code> - a basic implementation of <code>BinaryIdMapper</code>. It has a configuration property called |
| <code>setLowerCase(boolean isLowerCase)</code>. If the property is set to <code>false</code> then a hash code of given type or field name |
| will be returned. If the property is set to <code>true</code> then a hash code of given type or field name in lower case will be returned.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>If you are using Java or .NET clients and do not specify mappers in <code>BinaryConfiguration</code>, then Ignite will use |
| <code>BinaryBasicNameMapper</code> and the <code>simpleName</code> property will be set to <code>false</code>, and <code>BinaryBasicIdMapper</code> and the |
| <code>lowerCase</code> property will be set to <code>true</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If you are using the C++ client and do not specify mappers in <code>BinaryConfiguration</code>, then Ignite will use |
| <code>BinaryBasicNameMapper</code> and the <code>simpleName</code> property will be set to <code>true</code>, and <code>BinaryBasicIdMapper</code> and the |
| <code>lowerCase</code> property will be set to <code>true</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>By default, there is no need to configure anything if you use Java, .NET or C++. Mappers need to be configured if |
| there is a tricky name conversion when platform interoperability is needed.</p> |
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| <div class="copyright"> |
| © 2021 The Apache Software Foundation.<br/> |
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| <ul class="sectlevel1"> |
| <li><a href="#basic-concepts">Basic Concepts</a></li> |
| <li><a href="#configuring-binary-objects">Configuring Binary Objects</a></li> |
| <li><a href="#binaryobject-api">BinaryObject API</a></li> |
| <li><a href="#modifying-binary-objects-using-binaryobjectbuilder">Modifying Binary Objects Using BinaryObjectBuilder</a></li> |
| <li><a href="#binaryobject-type-metadata">BinaryObject Type Metadata</a></li> |
| <li><a href="#binaryobject-and-cachestore">BinaryObject and CacheStore</a></li> |
| <li><a href="#binary-name-mapper-and-binary-id-mapper">Binary Name Mapper and Binary ID Mapper</a></li> |
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