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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.eclipse.jetty.util.thread</a></div>
<h1 title="Interface Invocable" class="title">Interface Invocable</h1>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Known Subinterfaces:</dt>
<dd><code><a href="../Callback.html" title="interface in org.eclipse.jetty.util">Callback</a></code>, <code><a href="Invocable.Task.html" title="interface in org.eclipse.jetty.util.thread">Invocable.Task</a></code></dd>
</dl>
<dl class="notes">
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../../proxy/AsyncMiddleManServlet.ProxyReader.html" title="class in org.eclipse.jetty.proxy">AsyncMiddleManServlet.ProxyReader</a></code>, <code><a href="../../proxy/AsyncMiddleManServlet.ProxyResponseListener.html" title="class in org.eclipse.jetty.proxy">AsyncMiddleManServlet.ProxyResponseListener</a></code>, <code><a href="../../proxy/AsyncProxyServlet.StreamReader.html" title="class in org.eclipse.jetty.proxy">AsyncProxyServlet.StreamReader</a></code>, <code><a href="../Callback.Completable.html" title="class in org.eclipse.jetty.util">Callback.Completable</a></code>, <code><a href="../Callback.Completing.html" title="class in org.eclipse.jetty.util">Callback.Completing</a></code>, <code><a href="../Callback.Nested.html" title="class in org.eclipse.jetty.util">Callback.Nested</a></code>, <code><a href="../CountingCallback.html" title="class in org.eclipse.jetty.util">CountingCallback</a></code>, <code><a href="../../client/util/DeferredContentProvider.html" title="class in org.eclipse.jetty.client.util">DeferredContentProvider</a></code>, <code><a href="../../websocket/core/internal/DemandingFlusher.html" title="class in org.eclipse.jetty.websocket.core.internal">DemandingFlusher</a></code>, <code><a href="../../client/DuplexHttpDestination.html" title="class in org.eclipse.jetty.client">DuplexHttpDestination</a></code>, <code><a href="../../websocket/core/internal/FragmentExtension.FragmentingDemandingFlusher.html" title="class in org.eclipse.jetty.websocket.core.internal">FragmentExtension.FragmentingDemandingFlusher</a></code>, <code><a href="../../websocket/core/internal/FrameFlusher.html" title="class in org.eclipse.jetty.websocket.core.internal">FrameFlusher</a></code>, <code><a href="../FutureCallback.html" title="class in org.eclipse.jetty.util">FutureCallback</a></code>, <code><a href="../../fcgi/generator/Generator.Result.html" title="class in org.eclipse.jetty.fcgi.generator">Generator.Result</a></code>, <code><a href="../../http2/HTTP2Flusher.html" title="class in org.eclipse.jetty.http2">HTTP2Flusher</a></code>, <code><a href="../../http2/HTTP2Flusher.Entry.html" title="class in org.eclipse.jetty.http2">HTTP2Flusher.Entry</a></code>, <code><a href="../../http2/HTTP2Stream.html" title="class in org.eclipse.jetty.http2">HTTP2Stream</a></code>, <code><a href="../../client/HttpDestination.html" title="class in org.eclipse.jetty.client">HttpDestination</a></code>, <code><a href="../../server/HttpInput.Content.html" title="class in org.eclipse.jetty.server">HttpInput.Content</a></code>, <code><a href="../../server/HttpInput.EofContent.html" title="class in org.eclipse.jetty.server">HttpInput.EofContent</a></code>, <code><a href="../../server/HttpInput.ErrorContent.html" title="class in org.eclipse.jetty.server">HttpInput.ErrorContent</a></code>, <code><a href="../../server/HttpInput.SpecialContent.html" title="class in org.eclipse.jetty.server">HttpInput.SpecialContent</a></code>, <code><a href="../../server/HttpInput.WrappingContent.html" title="class in org.eclipse.jetty.server">HttpInput.WrappingContent</a></code>, <code><a href="../../client/util/InputStreamContentProvider.html" title="class in org.eclipse.jetty.client.util">InputStreamContentProvider</a></code>, <code><a href="Invocable.ReadyTask.html" title="class in org.eclipse.jetty.util.thread">Invocable.ReadyTask</a></code>, <code><a href="../IteratingCallback.html" title="class in org.eclipse.jetty.util">IteratingCallback</a></code>, <code><a href="../IteratingNestedCallback.html" title="class in org.eclipse.jetty.util">IteratingNestedCallback</a></code>, <code><a href="../../client/MultiplexHttpDestination.html" title="class in org.eclipse.jetty.client">MultiplexHttpDestination</a></code>, <code><a href="../../client/util/OutputStreamContentProvider.html" title="class in org.eclipse.jetty.client.util">OutputStreamContentProvider</a></code>, <code><a href="../../client/ProxyProtocolClientConnectionFactory.ProxyProtocolConnection.html" title="class in org.eclipse.jetty.client">ProxyProtocolClientConnectionFactory.ProxyProtocolConnection</a></code>, <code><a href="../../client/internal/RequestContentAdapter.html" title="class in org.eclipse.jetty.client.internal">RequestContentAdapter</a></code>, <code><a href="../../websocket/jakarta/common/SendHandlerCallback.html" title="class in org.eclipse.jetty.websocket.jakarta.common">SendHandlerCallback</a></code>, <code><a href="../SharedBlockingCallback.Blocker.html" title="class in org.eclipse.jetty.util">SharedBlockingCallback.Blocker</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">Invocable</span></div>
<div class="block"><p>A task (typically either a <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link"><code>Runnable</code></a> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/concurrent/Callable.html" title="class or interface in java.util.concurrent" class="external-link"><code>Callable</code></a>
that declares how it will behave when invoked:</p>
<ul>
<li>blocking, the invocation will certainly block (e.g. performs blocking I/O)</li>
<li>non-blocking, the invocation will certainly <strong>not</strong> block</li>
<li>either, the invocation <em>may</em> block</li>
</ul>
<p>
Static methods and are provided that allow the current thread to be tagged
with a <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/ThreadLocal.html" title="class or interface in java.lang" class="external-link"><code>ThreadLocal</code></a> to indicate if it has a blocking invocation type.
</p></div>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<li>
<section class="nested-class-summary" id="nested-class-summary">
<h2>Nested Class Summary</h2>
<div class="caption"><span>Nested Classes</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Interface</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static enum&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="Invocable.InvocationType.html" class="type-name-link" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></code></div>
<div class="col-last even-row-color">
<div class="block">The behavior of an <a href="Invocable.html" title="interface in org.eclipse.jetty.util.thread"><code>Invocable</code></a> when it is invoked.</div>
</div>
<div class="col-first odd-row-color"><code>static class&nbsp;</code></div>
<div class="col-second odd-row-color"><code><a href="Invocable.ReadyTask.html" class="type-name-link" title="class in org.eclipse.jetty.util.thread">Invocable.ReadyTask</a></code></div>
<div class="col-last odd-row-color">
<div class="block">A <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link"><code>Runnable</code></a> decorated with an <a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread"><code>Invocable.InvocationType</code></a>.</div>
</div>
<div class="col-first even-row-color"><code>static interface&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="Invocable.Task.html" class="type-name-link" title="interface in org.eclipse.jetty.util.thread">Invocable.Task</a></code></div>
<div class="col-last even-row-color">
<div class="block">A task with an <a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread"><code>Invocable.InvocationType</code></a>.</div>
</div>
</div>
</section>
</li>
<!-- =========== FIELD SUMMARY =========== -->
<li>
<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static final <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/ThreadLocal.html" title="class or interface in java.lang" class="external-link">ThreadLocal</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Boolean.html" title="class or interface in java.lang" class="external-link">Boolean</a>&gt;</code></div>
<div class="col-second even-row-color"><code><a href="#__nonBlocking" class="member-name-link">__nonBlocking</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab5" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab5', 3)" class="table-tab">Default Methods</button></div>
<div id="method-summary-table.tabpanel" role="tabpanel">
<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1"><code>static <a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1"><code><a href="#combine(org.eclipse.jetty.util.thread.Invocable.InvocationType,org.eclipse.jetty.util.thread.Invocable.InvocationType)" class="member-name-link">combine</a><wbr>(<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;it1,
<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;it2)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1"><code>static <a href="Invocable.Task.html" title="interface in org.eclipse.jetty.util.thread">Invocable.Task</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1"><code><a href="#from(org.eclipse.jetty.util.thread.Invocable.InvocationType,java.lang.Runnable)" class="member-name-link">from</a><wbr>(<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;type,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link">Runnable</a>&nbsp;task)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1">
<div class="block">Creates a <a href="Invocable.Task.html" title="interface in org.eclipse.jetty.util.thread"><code>Invocable.Task</code></a> from the given InvocationType and Runnable.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#getInvocationType()" class="member-name-link">getInvocationType</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5">&nbsp;</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1"><code>static <a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1"><code><a href="#getInvocationType(java.lang.Object)" class="member-name-link">getInvocationType</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;o)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1">
<div class="block">Get the invocation type of an Object.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1"><code>static void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1"><code><a href="#invokeNonBlocking(java.lang.Runnable)" class="member-name-link">invokeNonBlocking</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link">Runnable</a>&nbsp;task)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1">
<div class="block">Invoke a task with the calling thread, tagged to indicate
that it will not block.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1"><code>static boolean</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1"><code><a href="#isNonBlockingInvocation()" class="member-name-link">isNonBlockingInvocation</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1">
<div class="block">Test if the current thread has been tagged as non blocking</div>
</div>
</div>
</div>
</div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="__nonBlocking">
<h3>__nonBlocking</h3>
<div class="member-signature"><span class="modifiers">static final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/ThreadLocal.html" title="class or interface in java.lang" class="external-link">ThreadLocal</a>&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Boolean.html" title="class or interface in java.lang" class="external-link">Boolean</a>&gt;</span>&nbsp;<span class="element-name">__nonBlocking</span></div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="from(org.eclipse.jetty.util.thread.Invocable.InvocationType,java.lang.Runnable)">
<h3>from</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type"><a href="Invocable.Task.html" title="interface in org.eclipse.jetty.util.thread">Invocable.Task</a></span>&nbsp;<span class="element-name">from</span><wbr><span class="parameters">(<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;type,
<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link">Runnable</a>&nbsp;task)</span></div>
<div class="block"><p>Creates a <a href="Invocable.Task.html" title="interface in org.eclipse.jetty.util.thread"><code>Invocable.Task</code></a> from the given InvocationType and Runnable.</p></div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>type</code> - the InvocationType</dd>
<dd><code>task</code> - the Runnable</dd>
<dt>Returns:</dt>
<dd>a new Task</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="isNonBlockingInvocation()">
<h3>isNonBlockingInvocation</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isNonBlockingInvocation</span>()</div>
<div class="block">Test if the current thread has been tagged as non blocking</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>True if the task the current thread is running has
indicated that it will not block.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="invokeNonBlocking(java.lang.Runnable)">
<h3>invokeNonBlocking</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">invokeNonBlocking</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Runnable.html" title="class or interface in java.lang" class="external-link">Runnable</a>&nbsp;task)</span></div>
<div class="block">Invoke a task with the calling thread, tagged to indicate
that it will not block.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>task</code> - The task to invoke.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="combine(org.eclipse.jetty.util.thread.Invocable.InvocationType,org.eclipse.jetty.util.thread.Invocable.InvocationType)">
<h3>combine</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type"><a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></span>&nbsp;<span class="element-name">combine</span><wbr><span class="parameters">(<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;it1,
<a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a>&nbsp;it2)</span></div>
</section>
</li>
<li>
<section class="detail" id="getInvocationType(java.lang.Object)">
<h3>getInvocationType</h3>
<div class="member-signature"><span class="modifiers">static</span>&nbsp;<span class="return-type"><a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></span>&nbsp;<span class="element-name">getInvocationType</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>&nbsp;o)</span></div>
<div class="block">Get the invocation type of an Object.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>o</code> - The object to check the invocation type of.</dd>
<dt>Returns:</dt>
<dd>If the object is an Invocable, it is coerced and the <a href="#getInvocationType()"><code>getInvocationType()</code></a>
used, otherwise <a href="Invocable.InvocationType.html#BLOCKING"><code>Invocable.InvocationType.BLOCKING</code></a> is returned.</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getInvocationType()">
<h3>getInvocationType</h3>
<div class="member-signature"><span class="modifiers">default</span>&nbsp;<span class="return-type"><a href="Invocable.InvocationType.html" title="enum in org.eclipse.jetty.util.thread">Invocable.InvocationType</a></span>&nbsp;<span class="element-name">getInvocationType</span>()</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>The InvocationType of this object</dd>
</dl>
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