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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="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:aa841b99fddf9ce347b9c617058f179f2"><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#aa841b99fddf9ce347b9c617058f179f2">ServerAsyncWriter</a> (<a class="el" href="classgrpc_1_1_server_context.html">ServerContext</a> *ctx)</td></tr>
<tr class="separator:aa841b99fddf9ce347b9c617058f179f2"><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><a class="el" href="classgrpc_1_1_server_async_streaming_interface.html#ab2d5db2b2ca3032994396543a8bb044c" title="Request notification of the sending of initial metadata to the client. ">ServerAsyncStreamingInterface::SendInitialMetadata</a></em> for semantics.  <a href="#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="#a467f70c7460ceb7738fb938b3bf93c85">More...</a><br/></td></tr>
<tr class="separator:a467f70c7460ceb7738fb938b3bf93c85"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a370212343d5044083c218b5ee0fa0057"><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#a370212343d5044083c218b5ee0fa0057">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:a370212343d5044083c218b5ee0fa0057"><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="#a370212343d5044083c218b5ee0fa0057">More...</a><br/></td></tr>
<tr class="separator:a370212343d5044083c218b5ee0fa0057"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a80866b79d44c03e3ad73199dbe91a21d"><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#a80866b79d44c03e3ad73199dbe91a21d">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:a80866b79d44c03e3ad73199dbe91a21d"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#a6ef0f1e5f548977e0e98671b46fd80eb" title="Request the writing of msg and coalesce it with trailing metadata which contains status, using WriteOptions options with identifying tag tag. ">ServerAsyncWriterInterface.WriteAndFinish</a></em> method for semantics.  <a href="#a80866b79d44c03e3ad73199dbe91a21d">More...</a><br/></td></tr>
<tr class="separator:a80866b79d44c03e3ad73199dbe91a21d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a330082d0766d6867517a54919d650a20"><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#a330082d0766d6867517a54919d650a20">Finish</a> (const <a class="el" href="classgrpc_1_1_status.html">Status</a> &amp;status, void *tag) override</td></tr>
<tr class="memdesc:a330082d0766d6867517a54919d650a20"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em><a class="el" href="classgrpc_1_1_server_async_writer_interface.html#a52ecaf07a626039b4fd00bed98000152" title="Indicate that the stream is to be finished with a certain status code. ">ServerAsyncWriterInterface.Finish</a></em> method for semantics.  <a href="#a330082d0766d6867517a54919d650a20">More...</a><br/></td></tr>
<tr class="separator:a330082d0766d6867517a54919d650a20"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1_server_async_streaming_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1_server_async_streaming_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1_server_async_streaming_interface.html">grpc::ServerAsyncStreamingInterface</a></td></tr>
<tr class="memitem:af7c2bc176a6658e86a74a1cacd53d3bc inherit pub_methods_classgrpc_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_1_server_async_streaming_interface.html#af7c2bc176a6658e86a74a1cacd53d3bc">~ServerAsyncStreamingInterface</a> ()</td></tr>
<tr class="separator:af7c2bc176a6658e86a74a1cacd53d3bc inherit pub_methods_classgrpc_1_1_server_async_streaming_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1_async_writer_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1_async_writer_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1_async_writer_interface.html">grpc::AsyncWriterInterface&lt; W &gt;</a></td></tr>
<tr class="memitem:a94cc9e4ed13c8fe4a1d883d465477ddd inherit pub_methods_classgrpc_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_1_async_writer_interface.html#a94cc9e4ed13c8fe4a1d883d465477ddd">~AsyncWriterInterface</a> ()</td></tr>
<tr class="separator:a94cc9e4ed13c8fe4a1d883d465477ddd inherit pub_methods_classgrpc_1_1_async_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a78097d5f23f4aa2c1b919b12800db90d inherit pub_methods_classgrpc_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_1_async_writer_interface.html#a78097d5f23f4aa2c1b919b12800db90d">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:a78097d5f23f4aa2c1b919b12800db90d inherit pub_methods_classgrpc_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="#a78097d5f23f4aa2c1b919b12800db90d">More...</a><br/></td></tr>
<tr class="separator:a78097d5f23f4aa2c1b919b12800db90d inherit pub_methods_classgrpc_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 class="anchor" id="aa841b99fddf9ce347b9c617058f179f2"></a>
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template&lt;class W &gt; </div>
<table class="mlabels">
  <tr>
  <td class="mlabels-left">
      <table class="memname">
        <tr>
          <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">ServerContext</a> *&#160;</td>
          <td class="paramname"><em>ctx</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
  </td>
  <td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span>  </td>
  </tr>
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</div><div class="memdoc">

</div>
</div>
<h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="a330082d0766d6867517a54919d650a20"></a>
<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;::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>
        </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#a52ecaf07a626039b4fd00bed98000152" 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 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_writer_interface.html#a52ecaf07a626039b4fd00bed98000152">grpc::ServerAsyncWriterInterface&lt; W &gt;</a>.</p>

</div>
</div>
<a class="anchor" id="adbefffa0dd7ae810ed1c2bf877d46f96"></a>
<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>
        </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>
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<p>See <em><a class="el" href="classgrpc_1_1_server_async_streaming_interface.html#ab2d5db2b2ca3032994396543a8bb044c" title="Request notification of the sending of initial metadata to the client. ">ServerAsyncStreamingInterface::SendInitialMetadata</a></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>
  <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_1_server_async_streaming_interface.html#ab2d5db2b2ca3032994396543a8bb044c">grpc::ServerAsyncStreamingInterface</a>.</p>

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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>
          <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">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>
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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><a class="el" href="classgrpc_1_1_async_reader_interface.html#aa644cf63c12ae8c9d5fda16a361f8a11" title="Read a message of type R into msg. ">AsyncReaderInterface::Read</a></em> </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">tag</td><td>The tag identifying the operation. </td></tr>
  </table>
  </dd>
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<p>Implements <a class="el" href="classgrpc_1_1_async_writer_interface.html#a40c1091ac5cb5243c874da725ae291b4">grpc::AsyncWriterInterface&lt; W &gt;</a>.</p>

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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>
          <td>(</td>
          <td class="paramtype">const W &amp;&#160;</td>
          <td class="paramname"><em>msg</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <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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        <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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<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><a class="el" href="classgrpc_1_1_async_reader_interface.html#aa644cf63c12ae8c9d5fda16a361f8a11" title="Read a message of type R into msg. ">AsyncReaderInterface::Read</a></em> </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_1_async_writer_interface.html#a6a8480dbf5ad95384c929d9db91b6074">grpc::AsyncWriterInterface&lt; W &gt;</a>.</p>

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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>
          <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">WriteOptions</a>&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></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>
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          <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>
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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_writer_interface.html#a6ef0f1e5f548977e0e98671b46fd80eb" title="Request the writing of msg and coalesce it with trailing metadata which contains status, using WriteOptions options with identifying tag tag. ">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 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_writer_interface.html#a6ef0f1e5f548977e0e98671b46fd80eb">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/grpc++/impl/codegen/<a class="el" href="impl_2codegen_2async__stream_8h_source.html">async_stream.h</a></li>
</ul>
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