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<li class="navelem"><a class="el" href="namespacegrpc.html">grpc</a></li><li class="navelem"><a class="el" href="classgrpc_1_1_server_async_writer.html">ServerAsyncWriter</a></li>  </ul>
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<p>Async server-side API for doing server streaming RPCs, where the outgoing message stream from the server has messages of type <em>W</em>.  
 <a href="classgrpc_1_1_server_async_writer.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="grpcpp_2impl_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:a0f21be4a3176cfc434b7796bd4442679"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#a0f21be4a3176cfc434b7796bd4442679">ServerAsyncWriter</a> (::<a class="el" href="classgrpc_1_1_server_context.html">grpc::ServerContext</a> *ctx)</td></tr>
<tr class="separator:a0f21be4a3176cfc434b7796bd4442679"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adbefffa0dd7ae810ed1c2bf877d46f96"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#adbefffa0dd7ae810ed1c2bf877d46f96">SendInitialMetadata</a> (void *tag) override</td></tr>
<tr class="memdesc:adbefffa0dd7ae810ed1c2bf877d46f96"><td class="mdescLeft">&#160;</td><td class="mdescRight">See <em>ServerAsyncStreamingInterface::SendInitialMetadata</em> for semantics.  <a href="classgrpc_1_1_server_async_writer.html#adbefffa0dd7ae810ed1c2bf877d46f96">More...</a><br /></td></tr>
<tr class="separator:adbefffa0dd7ae810ed1c2bf877d46f96"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a467f70c7460ceb7738fb938b3bf93c85"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#a467f70c7460ceb7738fb938b3bf93c85">Write</a> (const W &amp;msg, void *tag) override</td></tr>
<tr class="memdesc:a467f70c7460ceb7738fb938b3bf93c85"><td class="mdescLeft">&#160;</td><td class="mdescRight">Request the writing of <em>msg</em> with identifying tag <em>tag</em>.  <a href="classgrpc_1_1_server_async_writer.html#a467f70c7460ceb7738fb938b3bf93c85">More...</a><br /></td></tr>
<tr class="separator:a467f70c7460ceb7738fb938b3bf93c85"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4ef42894ef7bc69f6b00fec798b6cf1d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#a4ef42894ef7bc69f6b00fec798b6cf1d">Write</a> (const W &amp;msg, ::<a class="el" href="classgrpc_1_1_write_options.html">grpc::WriteOptions</a> options, void *tag) override</td></tr>
<tr class="memdesc:a4ef42894ef7bc69f6b00fec798b6cf1d"><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="classgrpc_1_1_server_async_writer.html#a4ef42894ef7bc69f6b00fec798b6cf1d">More...</a><br /></td></tr>
<tr class="separator:a4ef42894ef7bc69f6b00fec798b6cf1d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6e89b1128f9680e4bf32d4b7a6d809c6"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#a6e89b1128f9680e4bf32d4b7a6d809c6">WriteAndFinish</a> (const W &amp;msg, ::<a class="el" href="classgrpc_1_1_write_options.html">grpc::WriteOptions</a> options, const ::<a class="el" href="classgrpc_1_1_status.html">grpc::Status</a> &amp;status, void *tag) override</td></tr>
<tr class="memdesc:a6e89b1128f9680e4bf32d4b7a6d809c6"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ad26e405df43c5557cda3f545e6579292" title="Request the writing of msg and coalesce it with trailing metadata which contains status,...">ServerAsyncWriterInterface.WriteAndFinish</a></em> method for semantics.  <a href="classgrpc_1_1_server_async_writer.html#a6e89b1128f9680e4bf32d4b7a6d809c6">More...</a><br /></td></tr>
<tr class="separator:a6e89b1128f9680e4bf32d4b7a6d809c6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae800ca37a4972b1cbda1aa3efe5391d0"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_async_writer.html#ae800ca37a4972b1cbda1aa3efe5391d0">Finish</a> (const ::<a class="el" href="classgrpc_1_1_status.html">grpc::Status</a> &amp;status, void *tag) override</td></tr>
<tr class="memdesc:ae800ca37a4972b1cbda1aa3efe5391d0"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ab99567d10f962ca678857fa75255d70e" title="Indicate that the stream is to be finished with a certain status code.">ServerAsyncWriterInterface.Finish</a></em> method for semantics.  <a href="classgrpc_1_1_server_async_writer.html#ae800ca37a4972b1cbda1aa3efe5391d0">More...</a><br /></td></tr>
<tr class="separator:ae800ca37a4972b1cbda1aa3efe5391d0"><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:a8dbc8f388cb8e79f587b821fd7d64ce7 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#a8dbc8f388cb8e79f587b821fd7d64ce7">WriteLast</a> (const W &amp;msg, ::<a class="el" href="classgrpc_1_1_write_options.html">grpc::WriteOptions</a> options, void *tag)</td></tr>
<tr class="memdesc:a8dbc8f388cb8e79f587b821fd7d64ce7 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="classgrpc_1_1internal_1_1_async_writer_interface.html#a8dbc8f388cb8e79f587b821fd7d64ce7">More...</a><br /></td></tr>
<tr class="separator:a8dbc8f388cb8e79f587b821fd7d64ce7 inherit pub_methods_classgrpc_1_1internal_1_1_async_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;class W&gt;<br />
class grpc::ServerAsyncWriter&lt; W &gt;</h3>

<p>Async server-side API for doing server streaming RPCs, where the outgoing message stream from the server has messages of type <em>W</em>. </p>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="a0f21be4a3176cfc434b7796bd4442679"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0f21be4a3176cfc434b7796bd4442679">&#9670;&nbsp;</a></span>ServerAsyncWriter()</h2>

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<div class="memtemplate">
template&lt;class W &gt; </div>
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  <td class="mlabels-left">
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          <td class="memname"><a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::<a class="el" href="classgrpc_1_1_server_async_writer.html">ServerAsyncWriter</a> </td>
          <td>(</td>
          <td class="paramtype">::<a class="el" href="classgrpc_1_1_server_context.html">grpc::ServerContext</a> *&#160;</td>
          <td class="paramname"><em>ctx</em></td><td>)</td>
          <td></td>
        </tr>
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  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span>  </td>
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</div><div class="memdoc">

</div>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="ae800ca37a4972b1cbda1aa3efe5391d0"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae800ca37a4972b1cbda1aa3efe5391d0">&#9670;&nbsp;</a></span>Finish()</h2>

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<div class="memtemplate">
template&lt;class W &gt; </div>
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  <tr>
  <td class="mlabels-left">
      <table class="memname">
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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::Finish </td>
          <td>(</td>
          <td class="paramtype">const ::<a class="el" href="classgrpc_1_1_status.html">grpc::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>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">override</span><span class="mlabel">virtual</span></span>  </td>
  </tr>
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</div><div class="memdoc">

<p>See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ab99567d10f962ca678857fa75255d70e" title="Indicate that the stream is to be finished with a certain status code.">ServerAsyncWriterInterface.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 or CallbackServerContext allows the code 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>gRPC doesn't take ownership or a reference to <em>status</em>, so it is safe to to deallocate once Finish returns. </p>

<p>Implements <a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ab99567d10f962ca678857fa75255d70e">grpc::ServerAsyncWriterInterface&lt; W &gt;</a>.</p>

</div>
</div>
<a id="adbefffa0dd7ae810ed1c2bf877d46f96"></a>
<h2 class="memtitle"><span class="permalink"><a href="#adbefffa0dd7ae810ed1c2bf877d46f96">&#9670;&nbsp;</a></span>SendInitialMetadata()</h2>

<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;class W &gt; </div>
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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::SendInitialMetadata </td>
          <td>(</td>
          <td class="paramtype">void *&#160;</td>
          <td class="paramname"><em>tag</em></td><td>)</td>
          <td></td>
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      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">override</span><span class="mlabel">virtual</span></span>  </td>
  </tr>
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</div><div class="memdoc">

<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 or CallbackServerContext allows the code implementing a service handler to:">ServerContext</a></em> associated with the call.</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">tag</td><td>Tag identifying this request. </td></tr>
  </table>
  </dd>
</dl>

<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_server_async_streaming_interface.html#ac55759faf2283db8bf716183881efe01">grpc::internal::ServerAsyncStreamingInterface</a>.</p>

</div>
</div>
<a id="a4ef42894ef7bc69f6b00fec798b6cf1d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4ef42894ef7bc69f6b00fec798b6cf1d">&#9670;&nbsp;</a></span>Write() <span class="overload">[1/2]</span></h2>

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<div class="memtemplate">
template&lt;class W &gt; </div>
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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::Write </td>
          <td>(</td>
          <td class="paramtype">const W &amp;&#160;</td>
          <td class="paramname"><em>msg</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">::<a class="el" href="classgrpc_1_1_write_options.html">grpc::WriteOptions</a>&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">void *&#160;</td>
          <td class="paramname"><em>tag</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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  <td class="mlabels-right">
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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>
<p>gRPC doesn't take ownership or a reference to <em>msg</em>, so it is safe to to deallocate once Write returns.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <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>
  </table>
  </dd>
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<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_async_writer_interface.html#a9fef3a3ceb6be3a140ef4a8ad33c6c75">grpc::internal::AsyncWriterInterface&lt; W &gt;</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a467f70c7460ceb7738fb938b3bf93c85">&#9670;&nbsp;</a></span>Write() <span class="overload">[2/2]</span></h2>

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template&lt;class W &gt; </div>
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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::Write </td>
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          <td class="paramtype">const W &amp;&#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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<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>
<p>gRPC doesn't take ownership or a reference to <em>msg</em>, so it is safe to to deallocate once Write returns.</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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<h2 class="memtitle"><span class="permalink"><a href="#a6e89b1128f9680e4bf32d4b7a6d809c6">&#9670;&nbsp;</a></span>WriteAndFinish()</h2>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_server_async_writer.html">grpc::ServerAsyncWriter</a>&lt; W &gt;::WriteAndFinish </td>
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          <td class="paramname"><em>msg</em>, </td>
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          <td class="paramtype">::<a class="el" href="classgrpc_1_1_write_options.html">grpc::WriteOptions</a>&#160;</td>
          <td class="paramname"><em>options</em>, </td>
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          <td class="paramtype">const ::<a class="el" href="classgrpc_1_1_status.html">grpc::Status</a> &amp;&#160;</td>
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<p>See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ad26e405df43c5557cda3f545e6579292" title="Request the writing of msg and coalesce it with trailing metadata which contains status,...">ServerAsyncWriterInterface.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 or CallbackServerContext allows the code implementing a service handler to:">ServerContext</a></em> associated with this call is used for sending trailing (and initial) metadata to the client.</li>
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<p>Note: <em>status</em> must have an OK code.</p>
<p>gRPC doesn't take ownership or a reference to <em>msg</em> and <em>status</em>, so it is safe to deallocate once WriteAndFinish returns. </p>

<p>Implements <a class="el" href="classgrpc_1_1_server_async_writer_interface.html#ad26e405df43c5557cda3f545e6579292">grpc::ServerAsyncWriterInterface&lt; W &gt;</a>.</p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li>include/grpcpp/impl/codegen/<a class="el" href="grpcpp_2impl_2codegen_2async__stream_8h_source.html">async_stream.h</a></li>
</ul>
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