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<p>Synchronous (blocking) server-side API for a bidirectional streaming call, where the incoming message stream coming from the client has messages of type <em>R</em>, and the outgoing message streaming coming from the server has messages of type <em>W</em>.  
 <a href="classgrpc_1_1_server_reader_writer.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="impl_2codegen_2sync__stream_8h_source.html">sync_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:aac6b08c8e1ff71c55a95963ccbbd493a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_reader_writer.html#aac6b08c8e1ff71c55a95963ccbbd493a">SendInitialMetadata</a> () override</td></tr>
<tr class="memdesc:aac6b08c8e1ff71c55a95963ccbbd493a"><td class="mdescLeft">&#160;</td><td class="mdescRight">See the <em>ServerStreamingInterface.SendInitialMetadata</em> method for semantics.  <a href="#aac6b08c8e1ff71c55a95963ccbbd493a">More...</a><br/></td></tr>
<tr class="separator:aac6b08c8e1ff71c55a95963ccbbd493a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a647d6e58b7720113db0357d1c4b7750f"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_reader_writer.html#a647d6e58b7720113db0357d1c4b7750f">NextMessageSize</a> (uint32_t *sz) override</td></tr>
<tr class="memdesc:a647d6e58b7720113db0357d1c4b7750f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Get an upper bound on the next message size available for reading on this stream.  <a href="#a647d6e58b7720113db0357d1c4b7750f">More...</a><br/></td></tr>
<tr class="separator:a647d6e58b7720113db0357d1c4b7750f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adc1925f519a8d1dc7b7101d37513774b"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_reader_writer.html#adc1925f519a8d1dc7b7101d37513774b">Read</a> (R *msg) override</td></tr>
<tr class="memdesc:adc1925f519a8d1dc7b7101d37513774b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Block to read a message and parse to <em>msg</em>.  <a href="#adc1925f519a8d1dc7b7101d37513774b">More...</a><br/></td></tr>
<tr class="separator:adc1925f519a8d1dc7b7101d37513774b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a12e60107e7b98f024903d56e7be8e6af"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_reader_writer.html#a12e60107e7b98f024903d56e7be8e6af">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:a12e60107e7b98f024903d56e7be8e6af"><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="#a12e60107e7b98f024903d56e7be8e6af">More...</a><br/></td></tr>
<tr class="separator:a12e60107e7b98f024903d56e7be8e6af"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_server_streaming_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_server_streaming_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_server_streaming_interface.html">grpc::internal::ServerStreamingInterface</a></td></tr>
<tr class="memitem:a2eef7573013077505dd7e22b3672acc5 inherit pub_methods_classgrpc_1_1internal_1_1_server_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_streaming_interface.html#a2eef7573013077505dd7e22b3672acc5">~ServerStreamingInterface</a> ()</td></tr>
<tr class="separator:a2eef7573013077505dd7e22b3672acc5 inherit pub_methods_classgrpc_1_1internal_1_1_server_streaming_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_writer_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_writer_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_writer_interface.html">grpc::internal::WriterInterface&lt; W &gt;</a></td></tr>
<tr class="memitem:a0f3bb9c5625b43d600d33d2bf8c17b60 inherit pub_methods_classgrpc_1_1internal_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_1internal_1_1_writer_interface.html#a0f3bb9c5625b43d600d33d2bf8c17b60">~WriterInterface</a> ()</td></tr>
<tr class="separator:a0f3bb9c5625b43d600d33d2bf8c17b60 inherit pub_methods_classgrpc_1_1internal_1_1_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89d051f5c00ede4469cfb216bd05b594 inherit pub_methods_classgrpc_1_1internal_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_1internal_1_1_writer_interface.html#a89d051f5c00ede4469cfb216bd05b594">Write</a> (const W &amp;msg)</td></tr>
<tr class="memdesc:a89d051f5c00ede4469cfb216bd05b594 inherit pub_methods_classgrpc_1_1internal_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="#a89d051f5c00ede4469cfb216bd05b594">More...</a><br/></td></tr>
<tr class="separator:a89d051f5c00ede4469cfb216bd05b594 inherit pub_methods_classgrpc_1_1internal_1_1_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3308bfe1558e317e5fa3530f74c63ce6 inherit pub_methods_classgrpc_1_1internal_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_1internal_1_1_writer_interface.html#a3308bfe1558e317e5fa3530f74c63ce6">WriteLast</a> (const W &amp;msg, <a class="el" href="classgrpc_1_1_write_options.html">WriteOptions</a> options)</td></tr>
<tr class="memdesc:a3308bfe1558e317e5fa3530f74c63ce6 inherit pub_methods_classgrpc_1_1internal_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="#a3308bfe1558e317e5fa3530f74c63ce6">More...</a><br/></td></tr>
<tr class="separator:a3308bfe1558e317e5fa3530f74c63ce6 inherit pub_methods_classgrpc_1_1internal_1_1_writer_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="inherit_header pub_methods_classgrpc_1_1internal_1_1_reader_interface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classgrpc_1_1internal_1_1_reader_interface')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classgrpc_1_1internal_1_1_reader_interface.html">grpc::internal::ReaderInterface&lt; R &gt;</a></td></tr>
<tr class="memitem:ad1d28c0720937a61b0f7952d3add7bba inherit pub_methods_classgrpc_1_1internal_1_1_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_reader_interface.html#ad1d28c0720937a61b0f7952d3add7bba">~ReaderInterface</a> ()</td></tr>
<tr class="separator:ad1d28c0720937a61b0f7952d3add7bba inherit pub_methods_classgrpc_1_1internal_1_1_reader_interface"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a>
Friends</h2></td></tr>
<tr class="memitem:acb69f5687f8e965fa8676bd6f8d47e4b"><td class="memItemLeft" align="right" valign="top">class&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgrpc_1_1_server_reader_writer.html#acb69f5687f8e965fa8676bd6f8d47e4b">internal::TemplatedBidiStreamingHandler&lt; ServerReaderWriter&lt; W, R &gt;, false &gt;</a></td></tr>
<tr class="separator:acb69f5687f8e965fa8676bd6f8d47e4b"><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, class R&gt;<br/>
class grpc::ServerReaderWriter&lt; W, R &gt;</h3>

<p>Synchronous (blocking) server-side API for a bidirectional streaming call, where the incoming message stream coming from the client has messages of type <em>R</em>, and the outgoing message streaming coming from the server has messages of type <em>W</em>. </p>
</div><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">bool <a class="el" href="classgrpc_1_1_server_reader_writer.html">grpc::ServerReaderWriter</a>&lt; W, R &gt;::NextMessageSize </td>
          <td>(</td>
          <td class="paramtype">uint32_t *&#160;</td>
          <td class="paramname"><em>sz</em></td><td>)</td>
          <td></td>
        </tr>
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  </td>
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<p>Get an upper bound on the next message size available for reading on this stream. </p>

<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_reader_interface.html#ad3216783fae57e614181e28df9435f33">grpc::internal::ReaderInterface&lt; R &gt;</a>.</p>

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template&lt;class W , class R &gt; </div>
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          <td class="memname">bool <a class="el" href="classgrpc_1_1_server_reader_writer.html">grpc::ServerReaderWriter</a>&lt; W, R &gt;::Read </td>
          <td>(</td>
          <td class="paramtype">R *&#160;</td>
          <td class="paramname"><em>msg</em></td><td>)</td>
          <td></td>
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<p>Block to read a message and parse to <em>msg</em>. </p>
<p>Returns <em>true</em> on success. This is thread-safe with respect to <em>Write</em> or  methods on the same stream. It should not be called concurrently with another <em>Read</em> on the same stream as the order of delivery will not be defined.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[out]</td><td class="paramname">msg</td><td>The read message.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><em>false</em> when there will be no more incoming messages, either because the other side has called <em>WritesDone()</em> or the stream has failed (or been cancelled). </dd></dl>

<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_reader_interface.html#adfb50ace59b4b9666a46548d3f732ee8">grpc::internal::ReaderInterface&lt; R &gt;</a>.</p>

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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_reader_writer.html">grpc::ServerReaderWriter</a>&lt; W, R &gt;::SendInitialMetadata </td>
          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td></td>
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<p>See the <em>ServerStreamingInterface.SendInitialMetadata</em> method for semantics. </p>
<p>Note that initial metadata will be affected by 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. </p>

<p>Implements <a class="el" href="classgrpc_1_1internal_1_1_server_streaming_interface.html#a45ab1e968a08b6c905ffac9a41e894d4">grpc::internal::ServerStreamingInterface</a>.</p>

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          <td class="memname">bool <a class="el" href="classgrpc_1_1_server_reader_writer.html">grpc::ServerReaderWriter</a>&lt; W, R &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>
        </tr>
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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>ReaderInterface::Read</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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  </dd>
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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_1internal_1_1_writer_interface.html#add3e3940ba338ab08705ea69d017a80b">grpc::internal::WriterInterface&lt; W &gt;</a>.</p>

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<h2 class="groupheader">Friends And Related Function Documentation</h2>
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template&lt;class W , class R &gt; </div>
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          <td class="memname">friend class <a class="el" href="classgrpc_1_1internal_1_1_templated_bidi_streaming_handler.html">internal::TemplatedBidiStreamingHandler</a>&lt; <a class="el" href="classgrpc_1_1_server_reader_writer.html">ServerReaderWriter</a>&lt; W, R &gt;,false &gt;</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_2sync__stream_8h_source.html">sync_stream.h</a></li>
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