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role=alert><div>This is documentation for <!-- -->Apache Fory™<!-- --> <b>0.14</b>, which is no longer actively maintained.</div><div class=margin-top--md>For up-to-date documentation, see the <b><a href=/docs/guide/java/advanced_features>latest version</a></b> (<!-- -->1.3.0<!-- -->).</div></div><div class=docItemContainer_Djhp><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label=Breadcrumbs><ul class=breadcrumbs><li class=breadcrumbs__item><a aria-label="Home page" class=breadcrumbs__link href=/><svg viewBox="0 0 24 24" class=breadcrumbHomeIcon_YNFT><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill=currentColor /></svg></a><li class=breadcrumbs__item><span class=breadcrumbs__link>Guide</span><li class=breadcrumbs__item><a class=breadcrumbs__link href=/docs/0.14/guide/java/><span>Java</span></a><li class="breadcrumbs__item breadcrumbs__item--active"><span class=breadcrumbs__link>Advanced Features</span></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 0.14</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type=button class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Advanced Features</h1></header><p>This page covers advanced features including zero-copy serialization, deep copy, memory management, and logging.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=zero-copy-serialization>Zero-Copy Serialization<a href=#zero-copy-serialization class=hash-link aria-label="Direct link to Zero-Copy Serialization" title="Direct link to Zero-Copy Serialization" translate=no></a></h2> |
| <p>Fory supports zero-copy serialization for efficient handling of large binary data:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import operator" style=color:#393A34>*</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>config</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import operator" style=color:#393A34>*</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>serializer</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">BufferObject</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>org</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>apache</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>fory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>memory</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">MemoryBuffer</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>java</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>util</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import operator" style=color:#393A34>*</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>java</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>util</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import namespace" style=opacity:0.7>stream</span><span class="token import namespace punctuation" style=opacity:0.7;color:#393A34>.</span><span class="token import class-name">Collectors</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>class</span><span class="token plain"> </span><span class="token class-name">ZeroCopyExample</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// Note that fory instance should be reused instead of creation every time.</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>static</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>withLanguage</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Language</span><span class="token punctuation" style=color:#393A34>.</span><span class="token constant" style=color:#36acaa>JAVA</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>build</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>static</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>void</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>main</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">String</span><span class="token punctuation" style=color:#393A34>[</span><span class="token punctuation" style=color:#393A34>]</span><span class="token plain"> args</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">List</span><span class="token generics punctuation" style=color:#393A34><</span><span class="token generics class-name">Object</span><span class="token generics punctuation" style=color:#393A34>></span><span class="token plain"> list </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Arrays</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>asList</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"str"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token number" style=color:#36acaa>1000</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>int</span><span class="token punctuation" style=color:#393A34>[</span><span class="token number" style=color:#36acaa>100</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>double</span><span class="token punctuation" style=color:#393A34>[</span><span class="token number" style=color:#36acaa>100</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">Collection</span><span class="token generics punctuation" style=color:#393A34><</span><span class="token generics class-name">BufferObject</span><span class="token generics punctuation" style=color:#393A34>></span><span class="token plain"> bufferObjects </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token class-name">ArrayList</span><span class="token generics punctuation" style=color:#393A34><</span><span class="token generics punctuation" style=color:#393A34>></span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token punctuation" style=color:#393A34>]</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">list</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> e </span><span class="token operator" style=color:#393A34>-></span><span class="token plain"> </span><span class="token operator" style=color:#393A34>!</span><span class="token plain">bufferObjects</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>add</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">e</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">List</span><span class="token generics punctuation" style=color:#393A34><</span><span class="token generics class-name">MemoryBuffer</span><span class="token generics punctuation" style=color:#393A34>></span><span class="token plain"> buffers </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> bufferObjects</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>stream</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>map</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">BufferObject</span><span class="token operator" style=color:#393A34>::</span><span class="token function" style=color:#d73a49>toBuffer</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>collect</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Collectors</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>toList</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">System</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">out</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>println</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>deserialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">bytes</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> buffers</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=object-deep-copy>Object Deep Copy<a href=#object-deep-copy class=hash-link aria-label="Direct link to Object Deep Copy" title="Direct link to Object Deep Copy" translate=no></a></h2> |
| <p>Fory provides efficient deep copy functionality:</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=with-reference-tracking>With Reference Tracking<a href=#with-reference-tracking class=hash-link aria-label="Direct link to With Reference Tracking" title="Direct link to With Reference Tracking" translate=no></a></h3> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token class-name">Fory</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>withRefCopy</span><span class="token punctuation" style=color:#393A34>(</span><span class="token boolean" style=color:#36acaa>true</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>build</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">SomeClass</span><span class="token plain"> a </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> xxx</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">SomeClass</span><span class="token plain"> copied </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>copy</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">a</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=without-reference-tracking-better-performance>Without Reference Tracking (Better Performance)<a href=#without-reference-tracking-better-performance class=hash-link aria-label="Direct link to Without Reference Tracking (Better Performance)" title="Direct link to Without Reference Tracking (Better Performance)" translate=no></a></h3> |
| <p>When disabled, deep copy will ignore circular and shared references. Same reference of an object graph will be copied into different objects in one <code>Fory#copy</code>:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token class-name">Fory</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>withRefCopy</span><span class="token punctuation" style=color:#393A34>(</span><span class="token boolean" style=color:#36acaa>false</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>build</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">SomeClass</span><span class="token plain"> a </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> xxx</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">SomeClass</span><span class="token plain"> copied </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>copy</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">a</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=memory-allocation-customization>Memory Allocation Customization<a href=#memory-allocation-customization class=hash-link aria-label="Direct link to Memory Allocation Customization" title="Direct link to Memory Allocation Customization" translate=no></a></h2> |
| <p>Fory provides a <code>MemoryAllocator</code> interface that allows you to customize how memory buffers are allocated and grown during serialization operations. This can be useful for performance optimization, memory pooling, or debugging memory usage.</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=memoryallocator-interface>MemoryAllocator Interface<a href=#memoryallocator-interface class=hash-link aria-label="Direct link to MemoryAllocator Interface" title="Direct link to MemoryAllocator Interface" translate=no></a></h3> |
| <p>The <code>MemoryAllocator</code> interface defines two key methods:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>interface</span><span class="token plain"> </span><span class="token class-name">MemoryAllocator</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>/**</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> * Allocates a new MemoryBuffer with the specified initial capacity.</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> */</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">MemoryBuffer</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>allocate</span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>int</span><span class="token plain"> initialCapacity</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>/**</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> * Grows an existing buffer to accommodate the new capacity.</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> * The implementation must grow the buffer in-place by modifying</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> * the existing buffer instance.</span><br/></div><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic> */</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">MemoryBuffer</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>grow</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">MemoryBuffer</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>int</span><span class="token plain"> newCapacity</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=using-custom-memory-allocators>Using Custom Memory Allocators<a href=#using-custom-memory-allocators class=hash-link aria-label="Direct link to Using Custom Memory Allocators" title="Direct link to Using Custom Memory Allocators" translate=no></a></h3> |
| <p>You can set a global memory allocator that will be used by all <code>MemoryBuffer</code> instances:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token comment" style=color:#999988;font-style:italic>// Create a custom allocator</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">MemoryAllocator</span><span class="token plain"> customAllocator </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token class-name">MemoryAllocator</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token annotation punctuation" style=color:#393A34>@Override</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token class-name">MemoryBuffer</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>allocate</span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>int</span><span class="token plain"> initialCapacity</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// Add extra capacity for debugging or pooling</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>return</span><span class="token plain"> </span><span class="token class-name">MemoryBuffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>fromByteArray</span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain">initialCapacity </span><span class="token operator" style=color:#393A34>+</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>100</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token annotation punctuation" style=color:#393A34>@Override</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token class-name">MemoryBuffer</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>grow</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">MemoryBuffer</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>int</span><span class="token plain"> newCapacity</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">newCapacity </span><span class="token operator" style=color:#393A34><=</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>size</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>return</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// Custom growth strategy - add 100% extra capacity</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>int</span><span class="token plain"> newSize </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>int</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">newCapacity </span><span class="token operator" style=color:#393A34>*</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>2</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token punctuation" style=color:#393A34>]</span><span class="token plain"> data </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>new</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token plain">newSize</span><span class="token punctuation" style=color:#393A34>]</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>copyToUnsafe</span><span class="token punctuation" style=color:#393A34>(</span><span class="token number" style=color:#36acaa>0</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> data</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token class-name">Platform</span><span class="token punctuation" style=color:#393A34>.</span><span class="token constant" style=color:#36acaa>BYTE_ARRAY_OFFSET</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>size</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>initHeapBuffer</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">data</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>0</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> data</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">length</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>return</span><span class="token plain"> buffer</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// Set the custom allocator globally</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">MemoryBuffer</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>setGlobalAllocator</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">customAllocator</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token comment" style=color:#999988;font-style:italic>// All subsequent MemoryBuffer allocations will use your custom allocator</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token class-name">Fory</span><span class="token plain"> fory </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>withLanguage</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">Language</span><span class="token punctuation" style=color:#393A34>.</span><span class="token constant" style=color:#36acaa>JAVA</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>build</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>byte</span><span class="token punctuation" style=color:#393A34>[</span><span class="token punctuation" style=color:#393A34>]</span><span class="token plain"> bytes </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>serialize</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">someObject</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// Uses custom allocator</span><br/></div></code></pre></div></div> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=default-memory-allocator-behavior>Default Memory Allocator Behavior<a href=#default-memory-allocator-behavior class=hash-link aria-label="Direct link to Default Memory Allocator Behavior" title="Direct link to Default Memory Allocator Behavior" translate=no></a></h3> |
| <p>The default allocator uses the following growth strategy:</p> |
| <ul> |
| <li class="">For buffers smaller than <code>BUFFER_GROW_STEP_THRESHOLD</code> (100MB): multiply capacity by 2</li> |
| <li class="">For larger buffers: multiply capacity by 1.5 (capped at <code>Integer.MAX_VALUE - 8</code>)</li> |
| </ul> |
| <p>This provides a balance between avoiding frequent reallocations and preventing excessive memory usage.</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=use-cases>Use Cases<a href=#use-cases class=hash-link aria-label="Direct link to Use Cases" title="Direct link to Use Cases" translate=no></a></h3> |
| <p>Custom memory allocators are useful for:</p> |
| <ul> |
| <li class=""><strong>Memory Pooling</strong>: Reuse allocated buffers to reduce GC pressure</li> |
| <li class=""><strong>Performance Tuning</strong>: Use different growth strategies based on your workload</li> |
| <li class=""><strong>Debugging</strong>: Add logging or tracking to monitor memory usage</li> |
| <li class=""><strong>Off-heap Memory</strong>: Integrate with off-heap memory management systems</li> |
| </ul> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=logging>Logging<a href=#logging class=hash-link aria-label="Direct link to Logging" title="Direct link to Logging" translate=no></a></h2> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=forylogger>ForyLogger<a href=#forylogger class=hash-link aria-label="Direct link to ForyLogger" title="Direct link to ForyLogger" translate=no></a></h3> |
| <p>By default, Fory uses a custom logger <code>ForyLogger</code> for internal needs. It builds resulting logged data into a single string and sends it directly to <code>System.out</code>. The result line layout is similar to (in Log4j notation):</p> |
| <div class="language-text codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-text codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">%d{yyyy-MM-dd hh:mm:ss} %p %C:%L [%t] - %m%n</span><br/></div></code></pre></div></div> |
| <p>The layout can't be changed.</p> |
| <p>Example output:</p> |
| <div class="language-text codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-text codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">2025-11-07 08:49:59 INFO CompileUnit:55 [main] - Generate code for org.apache.fory.builder.SerializedLambdaForyCodec_0 took 35 ms.</span><br/></div><div class=token-line style=color:#393A34><span class="token plain">2025-11-07 08:50:00 INFO JaninoUtils:121 [main] - Compile [SerializedLambdaForyCodec_0] take 144 ms</span><br/></div></code></pre></div></div> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=slf4jlogger>Slf4jLogger<a href=#slf4jlogger class=hash-link aria-label="Direct link to Slf4jLogger" title="Direct link to Slf4jLogger" translate=no></a></h3> |
| <p>If a more sophisticated logger is required, configure Fory to use Slf4j via <code>LoggerFactory.useSlf4jLogging()</code>. For example, enabling Slf4j before creating Fory:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>public</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>static</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>final</span><span class="token plain"> </span><span class="token class-name">ThreadSafeFory</span><span class="token plain"> </span><span class="token constant" style=color:#36acaa>FORY</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>static</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">LoggerFactory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>useSlf4jLogging</span><span class="token punctuation" style=color:#393A34>(</span><span class="token boolean" style=color:#36acaa>true</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token constant" style=color:#36acaa>FORY</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token class-name">Fory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>builder</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>buildThreadSafeFory</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p><strong>Note:</strong> Enabling Slf4j via <code>useSlf4jLogging</code> will be ignored when the application runs in a GraalVM native image.</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=suppress-fory-logs>Suppress Fory Logs<a href=#suppress-fory-logs class=hash-link aria-label="Direct link to Suppress Fory Logs" title="Direct link to Suppress Fory Logs" translate=no></a></h3> |
| <p>Both <code>ForyLogger</code> and <code>Slf4jLogger</code> allow controlling log output level or suppressing logs entirely. Configure logger level via <code>LoggerFactory.setLogLevel()</code>:</p> |
| <div class="language-java codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-java codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>static</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// to log only WARN and higher</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">LoggerFactory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>setLogLevel</span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">LogLevel</span><span class="token punctuation" style=color:#393A34>.</span><span class="token constant" style=color:#36acaa>WARN_LEVEL</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token comment" style=color:#999988;font-style:italic>// to disable logging entirely</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token class-name">LoggerFactory</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>disableLogging</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p><strong>Note:</strong> Selected logging level is applied before Slf4j implementation's logger level. So if you set <code>WARN_LEVEL</code> (as in the example above) then you will not see INFO messages from Fory even if INFO is enabled in Logback.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=related-topics>Related Topics<a href=#related-topics class=hash-link aria-label="Direct link to Related Topics" title="Direct link to Related Topics" translate=no></a></h2> |
| <ul> |
| <li class=""><a class="" href=/docs/0.14/guide/java/compression>Compression</a> - Data compression options</li> |
| <li class=""><a class="" href=/docs/0.14/guide/java/configuration>Configuration Options</a> - All ForyBuilder options</li> |
| <li class=""><a class="" href=/docs/0.14/guide/java/cross_language>Cross-Language Serialization</a> - XLANG mode</li> |
| </ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="row margin-top--sm theme-doc-footer-edit-meta-row"><div class="col noPrint_WFHX"><a href=https://github.com/apache/fory-site/tree/main/docs/guide/java/advanced-features.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg fill=currentColor height=20 width=20 viewBox="0 0 40 40" class=iconEdit_Z9Sw aria-hidden=true><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"/></g></svg>Edit this page</a></div><div class="col lastUpdated_JAkA"></div></div></footer></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href=/docs/0.14/guide/java/compression><div class=pagination-nav__sublabel>Previous</div><div class=pagination-nav__label>Compression</div></a><a class="pagination-nav__link pagination-nav__link--next" 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class="table-of-contents__link toc-highlight">MemoryAllocator Interface</a><li><a href=#using-custom-memory-allocators class="table-of-contents__link toc-highlight">Using Custom Memory Allocators</a><li><a href=#default-memory-allocator-behavior class="table-of-contents__link toc-highlight">Default Memory Allocator Behavior</a><li><a href=#use-cases class="table-of-contents__link toc-highlight">Use Cases</a></ul><li><a href=#logging class="table-of-contents__link toc-highlight">Logging</a><ul><li><a href=#forylogger class="table-of-contents__link toc-highlight">ForyLogger</a><li><a href=#slf4jlogger class="table-of-contents__link toc-highlight">Slf4jLogger</a><li><a href=#suppress-fory-logs class="table-of-contents__link toc-highlight">Suppress Fory Logs</a></ul><li><a href=#related-topics class="table-of-contents__link toc-highlight">Related Topics</a></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer footer--dark"><div class="container 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