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<p>Async server-side API for doing bidirectional streaming RPCs, where the incoming message stream coming from the client has messages of type <em>R</em>, and the outgoing message stream coming from the server has messages of type <em>W</em>.  
 <a href="classgrpc_1_1_server_async_reader_writer.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="impl_2codegen_2async__stream_8h_source.html">async_stream.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a6471b2baeaad0a1952628c67f948a703"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a6471b2baeaad0a1952628c67f948a703">ServerAsyncReaderWriter</a> (<a class="el" href="classgrpc_1_1_server_context.html">ServerContext</a> *ctx)</td></tr>
<tr class="separator:a6471b2baeaad0a1952628c67f948a703"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1c8e237a99a177ef68c37ad0de100499"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a1c8e237a99a177ef68c37ad0de100499">SendInitialMetadata</a> (void *tag) override</td></tr>
<tr class="memdesc:a1c8e237a99a177ef68c37ad0de100499"><td class="mdescLeft">&#160;</td><td class="mdescRight">See <em>ServerAsyncStreamingInterface::SendInitialMetadata</em> for semantics.  <a href="#a1c8e237a99a177ef68c37ad0de100499">More...</a><br/></td></tr>
<tr class="separator:a1c8e237a99a177ef68c37ad0de100499"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a911d41783f644e170c017bb3032ca5c8"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a911d41783f644e170c017bb3032ca5c8">Read</a> (R *msg, void *tag) override</td></tr>
<tr class="memdesc:a911d41783f644e170c017bb3032ca5c8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Read a message of type <em>R</em> into <em>msg</em>.  <a href="#a911d41783f644e170c017bb3032ca5c8">More...</a><br/></td></tr>
<tr class="separator:a911d41783f644e170c017bb3032ca5c8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a816fd9065473a24d4ab613ee2ecb19e1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a816fd9065473a24d4ab613ee2ecb19e1">Write</a> (const W &amp;msg, void *tag) override</td></tr>
<tr class="memdesc:a816fd9065473a24d4ab613ee2ecb19e1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request the writing of <em>msg</em> with identifying tag <em>tag</em>.  <a href="#a816fd9065473a24d4ab613ee2ecb19e1">More...</a><br/></td></tr>
<tr class="separator:a816fd9065473a24d4ab613ee2ecb19e1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a325a7fa8669c6212f36da5cf59ffb80c"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a325a7fa8669c6212f36da5cf59ffb80c">Write</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options, void *tag) override</td></tr>
<tr class="memdesc:a325a7fa8669c6212f36da5cf59ffb80c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request the writing of <em>msg</em> using <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em> with identifying tag <em>tag</em>.  <a href="#a325a7fa8669c6212f36da5cf59ffb80c">More...</a><br/></td></tr>
<tr class="separator:a325a7fa8669c6212f36da5cf59ffb80c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0b682431b5045eb62adff98d33a78f46"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a0b682431b5045eb62adff98d33a78f46">WriteAndFinish</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options, const <a class="el" href="classgrpc_1_1_status.html">Status</a> &amp;status, void *tag) override</td></tr>
<tr class="memdesc:a0b682431b5045eb62adff98d33a78f46"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#ae0c34bdc113287e1937f653b8d3c3116" title="Request the writing of msg and coalesce it with trailing metadata which contains status, using WriteOptions options with identifying tag tag. ">ServerAsyncReaderWriterInterface.WriteAndFinish</a></em> method for semantics.  <a href="#a0b682431b5045eb62adff98d33a78f46">More...</a><br/></td></tr>
<tr class="separator:a0b682431b5045eb62adff98d33a78f46"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a75342152acd961b7fcf1317bec0b8c3a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a75342152acd961b7fcf1317bec0b8c3a">Finish</a> (const <a class="el" href="classgrpc_1_1_status.html">Status</a> &amp;status, void *tag) override</td></tr>
<tr class="memdesc:a75342152acd961b7fcf1317bec0b8c3a"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#a1d890ac278003381d74ae8d29215f349" title="Indicate that the stream is to be finished with a certain status code. ">ServerAsyncReaderWriterInterface.Finish</a></em> method for semantics.  <a href="#a75342152acd961b7fcf1317bec0b8c3a">More...</a><br/></td></tr>
<tr class="separator:a75342152acd961b7fcf1317bec0b8c3a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_server_async_streaming_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_server_async_streaming_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_server_async_streaming_interface.html">grpc::internal::ServerAsyncStreamingInterface</a></td></tr>
<tr class="memitem:aeace2295f3792ce24975361c300d641a inherit pub_methods_classgrpc_1_1internal_1_1_server_async_streaming_interface"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1internal_1_1_server_async_streaming_interface.html#aeace2295f3792ce24975361c300d641a">~ServerAsyncStreamingInterface</a> ()</td></tr>
<tr class="separator:aeace2295f3792ce24975361c300d641a inherit pub_methods_classgrpc_1_1internal_1_1_server_async_streaming_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_async_writer_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html">grpc::internal::AsyncWriterInterface&lt; W &gt;</a></td></tr>
<tr class="memitem:a8ad846091252c112c4db0b41965e5a4c inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html#a8ad846091252c112c4db0b41965e5a4c">~AsyncWriterInterface</a> ()</td></tr>
<tr class="separator:a8ad846091252c112c4db0b41965e5a4c inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a02565abb7c6b4a7a49c0b29159194b66 inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html#a02565abb7c6b4a7a49c0b29159194b66">WriteLast</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options, void *tag)</td></tr>
<tr class="memdesc:a02565abb7c6b4a7a49c0b29159194b66 inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request the writing of <em>msg</em> and coalesce it with the writing of trailing metadata, using <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em> with identifying tag <em>tag</em>.  <a href="#a02565abb7c6b4a7a49c0b29159194b66">More...</a><br/></td></tr>
<tr class="separator:a02565abb7c6b4a7a49c0b29159194b66 inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_async_reader_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_async_reader_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_async_reader_interface.html">grpc::internal::AsyncReaderInterface&lt; R &gt;</a></td></tr>
<tr class="memitem:a18fe4235232864c8770a562cc2aa1f3c inherit pub_methods_classgrpc_1_1internal_1_1_async_reader_interface"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1internal_1_1_async_reader_interface.html#a18fe4235232864c8770a562cc2aa1f3c">~AsyncReaderInterface</a> ()</td></tr>
<tr class="separator:a18fe4235232864c8770a562cc2aa1f3c inherit pub_methods_classgrpc_1_1internal_1_1_async_reader_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
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Friends</h2></td></tr>
<tr class="memitem:a8c3fa4c066981aae114e41c3f9340144"><td class="memItemLeft" align="right" valign="top">class&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html#a8c3fa4c066981aae114e41c3f9340144">::grpc::Server</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;class W, class R&gt;<br/>
class grpc::ServerAsyncReaderWriter&lt; W, R &gt;</h3>

<p>Async server-side API for doing bidirectional streaming RPCs, where the incoming message stream coming from the client has messages of type <em>R</em>, and the outgoing message stream coming from the server has messages of type <em>W</em>. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
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template&lt;class W , class R &gt; </div>
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          <td class="memname"><a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::<a class="el" href="classgrpc_1_1_server_async_reader_writer.html">ServerAsyncReaderWriter</a> </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classgrpc_1_1_server_context.html">ServerContext</a> *&#160;</td>
          <td class="paramname"><em>ctx</em></td><td>)</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span>  </td>
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<h2 class="groupheader">Member Function Documentation</h2>
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template&lt;class W , class R &gt; </div>
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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::Finish </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="classgrpc_1_1_status.html">Status</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">void *&#160;</td>
          <td class="paramname"><em>tag</em>&#160;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">override</span><span class="mlabel">virtual</span></span>  </td>
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<p>See the <em><a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#a1d890ac278003381d74ae8d29215f349" title="Indicate that the stream is to be finished with a certain status code. ">ServerAsyncReaderWriterInterface.Finish</a></em> method for semantics. </p>
<p>Implicit input parameter:</p>
<ul>
<li>the <em><a class="el" href="classgrpc_1_1_server_context.html" title="A ServerContext allows the person implementing a service handler to: ">ServerContext</a></em> associated with this call is used for sending trailing (and initial if not already sent) metadata to the client.</li>
</ul>
<p>Note: there are no restrictions are the code of <em>status</em>, it may be non-OK </p>

<p>Implements <a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#a1d890ac278003381d74ae8d29215f349">grpc::ServerAsyncReaderWriterInterface&lt; W, R &gt;</a>.</p>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::Read </td>
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          <td class="paramtype">R *&#160;</td>
          <td class="paramname"><em>msg</em>, </td>
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          <td class="paramtype">void *&#160;</td>
          <td class="paramname"><em>tag</em>&#160;</td>
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          <td>)</td>
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<p>Read a message of type <em>R</em> into <em>msg</em>. </p>
<p>Completion will be notified by <em>tag</em> on the associated completion queue. This is thread-safe with respect to <em>Write</em> or <em>WritesDone</em> methods. It should not be called concurrently with other streaming APIs on the same stream. It is not meaningful to call it concurrently with another <em>AsyncReaderInterface::Read</em> on the same stream since reads on the same stream are delivered in order.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[out]</td><td class="paramname">msg</td><td>Where to eventually store the read message. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">tag</td><td>The tag identifying the operation.</td></tr>
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<p>Side effect: note that this method attempt to receive initial metadata for a stream if it hasn't yet been received. </p>

<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_async_reader_interface.html#adf87c602036d69158950b7299d0aae70">grpc::internal::AsyncReaderInterface&lt; R &gt;</a>.</p>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::SendInitialMetadata </td>
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          <td class="paramtype">void *&#160;</td>
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<p>See <em>ServerAsyncStreamingInterface::SendInitialMetadata</em> for semantics. </p>
<p>Implicit input parameter:</p>
<ul>
<li>The initial metadata that will be sent to the client from this op will be taken from the <em><a class="el" href="classgrpc_1_1_server_context.html" title="A ServerContext allows the person implementing a service handler to: ">ServerContext</a></em> associated with the call.</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">tag</td><td>Tag identifying this request. </td></tr>
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<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_server_async_streaming_interface.html#ac55759faf2283db8bf716183881efe01">grpc::internal::ServerAsyncStreamingInterface</a>.</p>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::Write </td>
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<p>Request the writing of <em>msg</em> with identifying tag <em>tag</em>. </p>
<p>Only one write may be outstanding at any given time. This means that after calling Write, one must wait to receive <em>tag</em> from the completion queue BEFORE calling Write again. This is thread-safe with respect to <em>AsyncReaderInterface::Read</em> </p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>The message to be written. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">tag</td><td>The tag identifying the operation. </td></tr>
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<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html#aa61e21fdfef0a4fb34f595bef767e6a8">grpc::internal::AsyncWriterInterface&lt; W &gt;</a>.</p>

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          <td class="paramtype">const W &amp;&#160;</td>
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          <td class="paramname"><em>tag</em>&#160;</td>
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<p>Request the writing of <em>msg</em> using <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em> with identifying tag <em>tag</em>. </p>
<p>Only one write may be outstanding at any given time. This means that after calling Write, one must wait to receive <em>tag</em> from the completion queue BEFORE calling Write again. <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em> is used to set the write options of this message. This is thread-safe with respect to <em>AsyncReaderInterface::Read</em> </p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">msg</td><td>The message to be written. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">options</td><td>The <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> to be used to write this message. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">tag</td><td>The tag identifying the operation. </td></tr>
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<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html#a5745991911afa0fb12646a5f79738a0d">grpc::internal::AsyncWriterInterface&lt; W &gt;</a>.</p>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_reader_writer.html">grpc::ServerAsyncReaderWriter</a>&lt; W, R &gt;::WriteAndFinish </td>
          <td>(</td>
          <td class="paramtype">const W &amp;&#160;</td>
          <td class="paramname"><em>msg</em>, </td>
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          <td class="paramtype"><a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a>&#160;</td>
          <td class="paramname"><em>options</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">const <a class="el" href="classgrpc_1_1_status.html">Status</a> &amp;&#160;</td>
          <td class="paramname"><em>status</em>, </td>
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          <td class="paramtype">void *&#160;</td>
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          <td>)</td>
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<p>See the <em><a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#ae0c34bdc113287e1937f653b8d3c3116" title="Request the writing of msg and coalesce it with trailing metadata which contains status, using WriteOptions options with identifying tag tag. ">ServerAsyncReaderWriterInterface.WriteAndFinish</a></em> method for semantics. </p>
<p>Implicit input parameter:</p>
<ul>
<li>the <em><a class="el" href="classgrpc_1_1_server_context.html" title="A ServerContext allows the person implementing a service handler to: ">ServerContext</a></em> associated with this call is used for sending trailing (and initial) metadata to the client.</li>
</ul>
<p>Note: <em>status</em> must have an OK code. </p>

<p>Implements <a class="el" href="classgrpc_1_1_server_async_reader_writer_interface.html#ae0c34bdc113287e1937f653b8d3c3116">grpc::ServerAsyncReaderWriterInterface&lt; W, R &gt;</a>.</p>

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<h2 class="groupheader">Friends And Related Function Documentation</h2>
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          <td class="memname">friend class ::<a class="el" href="classgrpc_1_1_server.html">grpc::Server</a></td>
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<span class="mlabels"><span class="mlabel">friend</span></span>  </td>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>include/grpc++/impl/codegen/<a class="el" href="impl_2codegen_2async__stream_8h_source.html">async_stream.h</a></li>
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