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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_client_writer.html">ClientWriter</a></li>  </ul>
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<p>Synchronous (blocking) client-side API for doing client-streaming RPCs, where the outgoing message stream coming from the client has messages of type <em>W</em>.  
 <a href="classgrpc_1_1_client_writer.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="channel__interface_8h_source.html">channel_interface.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:aed7d44896e0630a13409803459bd3cbe"><td class="memTemplParams" colspan="2">template&lt;class R &gt; </td></tr>
<tr class="memitem:aed7d44896e0630a13409803459bd3cbe"><td class="memTemplItemLeft" align="right" valign="top">&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_writer.html#aed7d44896e0630a13409803459bd3cbe">ClientWriter</a> (<a class="el" href="classgrpc_1_1_channel_interface.html">ChannelInterface</a> *channel, const <a class="el" href="classgrpc_1_1_rpc_method.html">RpcMethod</a> &amp;method, <a class="el" href="classgrpc_1_1_client_context.html">ClientContext</a> *context, R *response)</td></tr>
<tr class="memdesc:aed7d44896e0630a13409803459bd3cbe"><td class="mdescLeft">&#160;</td><td class="mdescRight">Block to create a stream (i.e.  <a href="#aed7d44896e0630a13409803459bd3cbe">More...</a><br/></td></tr>
<tr class="separator:aed7d44896e0630a13409803459bd3cbe"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a814a24b9a0348055195b3d9e837ae0a1"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_writer.html#a814a24b9a0348055195b3d9e837ae0a1">WaitForInitialMetadata</a> ()</td></tr>
<tr class="memdesc:a814a24b9a0348055195b3d9e837ae0a1"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em>ClientStreamingInterface.WaitForInitialMetadata</em> method for semantics.  <a href="#a814a24b9a0348055195b3d9e837ae0a1">More...</a><br/></td></tr>
<tr class="separator:a814a24b9a0348055195b3d9e837ae0a1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad6b1906d4f9cb0a14431aeb310e6674b"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_writer.html#ad6b1906d4f9cb0a14431aeb310e6674b">Write</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options) override</td></tr>
<tr class="memdesc:ad6b1906d4f9cb0a14431aeb310e6674b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Block to write <em>msg</em> to the stream with <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em>.  <a href="#ad6b1906d4f9cb0a14431aeb310e6674b">More...</a><br/></td></tr>
<tr class="separator:ad6b1906d4f9cb0a14431aeb310e6674b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab77b5d10da6bd85684bffad7bf32ea63"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_writer.html#ab77b5d10da6bd85684bffad7bf32ea63">WritesDone</a> () override</td></tr>
<tr class="memdesc:ab77b5d10da6bd85684bffad7bf32ea63"><td class="mdescLeft">&#160;</td><td class="mdescRight">Half close writing from the client.  <a href="#ab77b5d10da6bd85684bffad7bf32ea63">More...</a><br/></td></tr>
<tr class="separator:ab77b5d10da6bd85684bffad7bf32ea63"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab6c58e110c289ac0f76ae1fdb8fe24a3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgrpc_1_1_status.html">Status</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_writer.html#ab6c58e110c289ac0f76ae1fdb8fe24a3">Finish</a> () override</td></tr>
<tr class="memdesc:ab6c58e110c289ac0f76ae1fdb8fe24a3"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <a class="el" href="classgrpc_1_1_client_streaming_interface.html#a98e2927a42c793017ce7d8c6e88539c4" title="Block waiting until the stream finishes and a final status of the call is available. ">ClientStreamingInterface.Finish</a> method for semantics.  <a href="#ab6c58e110c289ac0f76ae1fdb8fe24a3">More...</a><br/></td></tr>
<tr class="separator:ab6c58e110c289ac0f76ae1fdb8fe24a3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1_client_streaming_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1_client_streaming_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1_client_streaming_interface.html">grpc::ClientStreamingInterface</a></td></tr>
<tr class="memitem:a312c9454c0f950e1c75b5c802bcbb00e inherit pub_methods_classgrpc_1_1_client_streaming_interface"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_client_streaming_interface.html#a312c9454c0f950e1c75b5c802bcbb00e">~ClientStreamingInterface</a> ()</td></tr>
<tr class="separator:a312c9454c0f950e1c75b5c802bcbb00e inherit pub_methods_classgrpc_1_1_client_streaming_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1_writer_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1_writer_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1_writer_interface.html">grpc::WriterInterface&lt; W &gt;</a></td></tr>
<tr class="memitem:a447d71736fb6e8c6bd21287ecc3a9f75 inherit pub_methods_classgrpc_1_1_writer_interface"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_writer_interface.html#a447d71736fb6e8c6bd21287ecc3a9f75">~WriterInterface</a> ()</td></tr>
<tr class="separator:a447d71736fb6e8c6bd21287ecc3a9f75 inherit pub_methods_classgrpc_1_1_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5ddbce2a74455afea61fc21e16b01c6a inherit pub_methods_classgrpc_1_1_writer_interface"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_writer_interface.html#a5ddbce2a74455afea61fc21e16b01c6a">Write</a> (const W &amp;msg)</td></tr>
<tr class="memdesc:a5ddbce2a74455afea61fc21e16b01c6a inherit pub_methods_classgrpc_1_1_writer_interface"><td class="mdescLeft">&#160;</td><td class="mdescRight">Block to write <em>msg</em> to the stream with default write options.  <a href="#a5ddbce2a74455afea61fc21e16b01c6a">More...</a><br/></td></tr>
<tr class="separator:a5ddbce2a74455afea61fc21e16b01c6a inherit pub_methods_classgrpc_1_1_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8a4180c8928156e9daffa18465866ad2 inherit pub_methods_classgrpc_1_1_writer_interface"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_writer_interface.html#a8a4180c8928156e9daffa18465866ad2">WriteLast</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options)</td></tr>
<tr class="memdesc:a8a4180c8928156e9daffa18465866ad2 inherit pub_methods_classgrpc_1_1_writer_interface"><td class="mdescLeft">&#160;</td><td class="mdescRight">Write <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>.  <a href="#a8a4180c8928156e9daffa18465866ad2">More...</a><br/></td></tr>
<tr class="separator:a8a4180c8928156e9daffa18465866ad2 inherit pub_methods_classgrpc_1_1_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::ClientWriter&lt; W &gt;</h3>

<p>Synchronous (blocking) client-side API for doing client-streaming RPCs, where the outgoing message stream coming from the client 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 &gt; </div>
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template&lt;class R &gt; </div>
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          <td class="memname"><a class="el" href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</a>&lt; W &gt;::<a class="el" href="classgrpc_1_1_client_writer.html">ClientWriter</a> </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classgrpc_1_1_channel_interface.html">ChannelInterface</a> *&#160;</td>
          <td class="paramname"><em>channel</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="classgrpc_1_1_rpc_method.html">RpcMethod</a> &amp;&#160;</td>
          <td class="paramname"><em>method</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="classgrpc_1_1_client_context.html">ClientContext</a> *&#160;</td>
          <td class="paramname"><em>context</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">R *&#160;</td>
          <td class="paramname"><em>response</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<p>Block to create a stream (i.e. </p>
<p>send request headers and other initial metadata to the server). Note that <em>context</em> will be used to fill in custom initial metadata. <em>response</em> will be filled in with the single expected response message from the server upon a successful call to the <em>Finish</em> method of this instance. </p>

</div>
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<h2 class="groupheader">Member Function Documentation</h2>
<a class="anchor" id="ab6c58e110c289ac0f76ae1fdb8fe24a3"></a>
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template&lt;class W &gt; </div>
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      <table class="memname">
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          <td class="memname"><a class="el" href="classgrpc_1_1_status.html">Status</a> <a class="el" href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</a>&lt; W &gt;::Finish </td>
          <td>(</td>
          <td class="paramname"></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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<p>See the <a class="el" href="classgrpc_1_1_client_streaming_interface.html#a98e2927a42c793017ce7d8c6e88539c4" title="Block waiting until the stream finishes and a final status of the call is available. ">ClientStreamingInterface.Finish</a> method for semantics. </p>
<p>Side effects:</p>
<ul>
<li>Also receives initial metadata if not already received.</li>
<li>Attempts to fill in the <em>response</em> parameter passed to the constructor of this instance with the response message from the server. </li>
</ul>

<p>Implements <a class="el" href="classgrpc_1_1_client_streaming_interface.html#a98e2927a42c793017ce7d8c6e88539c4">grpc::ClientStreamingInterface</a>.</p>

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          <td class="memname">void <a class="el" href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</a>&lt; W &gt;::WaitForInitialMetadata </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
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      </table>
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<p>See the <em>ClientStreamingInterface.WaitForInitialMetadata</em> method for semantics. </p>
<p>Once complete, the initial metadata read from the server will be accessable through the <em><a class="el" href="classgrpc_1_1_client_context.html" title="A ClientContext allows the person implementing a service client to: ">ClientContext</a></em> used to construct this object. </p>

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          <td class="memname">bool <a class="el" href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</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">WriteOptions</a>&#160;</td>
          <td class="paramname"><em>options</em>&#160;</td>
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          <td></td>
          <td>)</td>
          <td></td><td></td>
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<p>Block to write <em>msg</em> to the stream with <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> <em>options</em>. </p>
<p>This is thread-safe with respect to <em><a class="el" href="classgrpc_1_1_reader_interface.html#a04a1da8610d790ea86ecd5a14fe892b8" title="Block to read a message and parse to msg. ">ReaderInterface::Read</a></em> </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">msg</td><td>The message to be written to the stream. </td></tr>
    <tr><td class="paramname">options</td><td>The <a class="el" href="classgrpc_1_1_write_options.html" title="Per-message write options. ">WriteOptions</a> affecting the write operation.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd><em>true</em> on success, <em>false</em> when the stream has been closed. </dd></dl>

<p>Implements <a class="el" href="classgrpc_1_1_writer_interface.html#ae2ddda78f4e1deadf858a68b955e787d">grpc::WriterInterface&lt; W &gt;</a>.</p>

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template&lt;class W &gt; </div>
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          <td class="memname">bool <a class="el" href="classgrpc_1_1_client_writer.html">grpc::ClientWriter</a>&lt; W &gt;::WritesDone </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>Half close writing from the client. </p>
<p>(signal that the stream of messages coming from the clinet is complete). Blocks until currently-pending writes are completed. Thread safe with respect to <em><a class="el" href="classgrpc_1_1_reader_interface.html#a04a1da8610d790ea86ecd5a14fe892b8" title="Block to read a message and parse to msg. ">ReaderInterface::Read</a></em> operations only</p>
<dl class="section return"><dt>Returns</dt><dd>Whether the writes were successful. </dd></dl>

<p>Implements <a class="el" href="classgrpc_1_1_client_writer_interface.html#aff19574252338e9ac1b5446e82ed8ac5">grpc::ClientWriterInterface&lt; W &gt;</a>.</p>

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<hr/>The documentation for this class was generated from the following files:<ul>
<li>include/grpc++/impl/codegen/<a class="el" href="channel__interface_8h_source.html">channel_interface.h</a></li>
<li>include/grpc++/impl/codegen/<a class="el" href="impl_2codegen_2sync__stream_8h_source.html">sync_stream.h</a></li>
</ul>
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