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<a href="impl_2codegen_2server__callback_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright 2018 gRPC authors.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * You may obtain a copy of the License at</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> *     http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * limitations under the License.</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#ifndef GRPCPP_IMPL_CODEGEN_SERVER_CALLBACK_H</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#define GRPCPP_IMPL_CODEGEN_SERVER_CALLBACK_H</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;functional&gt;</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2call_8h.html">grpcpp/impl/codegen/call.h</a>&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="call__op__set_8h.html">grpcpp/impl/codegen/call_op_set.h</a>&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="callback__common_8h.html">grpcpp/impl/codegen/callback_common.h</a>&gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2config_8h.html">grpcpp/impl/codegen/config.h</a>&gt;</span></div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2core__codegen__interface_8h.html">grpcpp/impl/codegen/core_codegen_interface.h</a>&gt;</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2server__context_8h.html">grpcpp/impl/codegen/server_context.h</a>&gt;</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2server__interface_8h.html">grpcpp/impl/codegen/server_interface.h</a>&gt;</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="grpcpp_2impl_2codegen_2status_8h.html">grpcpp/impl/codegen/status.h</a>&gt;</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegrpc.html">grpc</a> {</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">// forward declarations</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">namespace </span>internal {</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> ServiceType, <span class="keyword">class</span> RequestType, <span class="keyword">class</span> ResponseType&gt;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="keyword">class </span>CallbackUnaryHandler;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;}  <span class="comment">// namespace internal</span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">namespace </span>experimental {</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">// For unary RPCs, the exposed controller class is only an interface</span></div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment">// and the actual implementation is an internal class.</span></div><div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">   45</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">ServerCallbackRpcController</a> {</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html#a0f5d7b42765e734d99e96917570bd855">   47</a></span>&#160;  <span class="keyword">virtual</span> <a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html#a0f5d7b42765e734d99e96917570bd855">~ServerCallbackRpcController</a>() {}</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;  <span class="comment">// The method handler must call this function when it is done so that</span></div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <span class="comment">// the library knows to free its resources</span></div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> Finish(<a class="code" href="classgrpc_1_1_status.html">Status</a> s) = 0;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;  <span class="comment">// Allow the method handler to push out the initial metadata before</span></div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;  <span class="comment">// the response and status are ready</span></div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  <span class="keyword">virtual</span> <span class="keywordtype">void</span> SendInitialMetadata(std::function&lt;<span class="keywordtype">void</span>(<span class="keywordtype">bool</span>)&gt;) = 0;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;};</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;}  <span class="comment">// namespace experimental</span></div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="keyword">namespace </span>internal {</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> ServiceType, <span class="keyword">class</span> RequestType, <span class="keyword">class</span> ResponseType&gt;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">class </span>CallbackUnaryHandler : <span class="keyword">public</span> MethodHandler {</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a00b3bafcc1b66249da2bdc1df9f559d8">   65</a></span>&#160;  <a class="code" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a00b3bafcc1b66249da2bdc1df9f559d8">CallbackUnaryHandler</a>(</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;      std::function&lt;<span class="keywordtype">void</span>(<a class="code" href="classgrpc_1_1_server_context.html">ServerContext</a>*, <span class="keyword">const</span> RequestType*, ResponseType*,</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                         <a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">experimental::ServerCallbackRpcController</a>*)&gt;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;          func,</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      ServiceType* service)</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;      : func_(func) {}</div><div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a41ded2aa0c9018e3e608ffe277c3986e">   71</a></span>&#160;  <span class="keywordtype">void</span> <a class="code" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a41ded2aa0c9018e3e608ffe277c3986e">RunHandler</a>(<span class="keyword">const</span> <a class="code" href="structgrpc_1_1internal_1_1_method_handler_1_1_handler_parameter.html">HandlerParameter</a>&amp; param) <span class="keyword">final</span> {</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="comment">// Arena allocate a controller structure (that includes request/response)</span></div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <a class="code" href="namespacegrpc.html#abbcecc18dae64c65df0b6d9aa8bf67a8">g_core_codegen_interface</a>-&gt;<a class="code" href="classgrpc_1_1_core_codegen_interface.html#a715e4e7dfab8362f01a8199489215404">grpc_call_ref</a>(param.call-&gt;call());</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="keyword">auto</span>* controller = <span class="keyword">new</span> (<a class="code" href="namespacegrpc.html#abbcecc18dae64c65df0b6d9aa8bf67a8">g_core_codegen_interface</a>-&gt;<a class="code" href="classgrpc_1_1_core_codegen_interface.html#a95637f38b81aeaf75b8868a9e38423c1">grpc_call_arena_alloc</a>(</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        param.call-&gt;call(), <span class="keyword">sizeof</span>(ServerCallbackRpcControllerImpl)))</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        ServerCallbackRpcControllerImpl(</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;            param.server_context, param.call,</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            static_cast&lt;RequestType*&gt;(param.request),</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;            std::move(param.call_requester));</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <a class="code" href="classgrpc_1_1_status.html">Status</a> status = param.status;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keywordflow">if</span> (status.<a class="code" href="classgrpc_1_1_status.html#ab80672b5665c32dc0937a0d58a3ce192">ok</a>()) {</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;      <span class="comment">// Call the actual function handler and expect the user to call finish</span></div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;      <a class="code" href="namespacegrpc_1_1internal.html#a161ad876dc2d4fea93dd8260a7b9b0ae">CatchingCallback</a>(std::move(func_), param.server_context,</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                       controller-&gt;request(), controller-&gt;response(),</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                       controller);</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;      <span class="comment">// if deserialization failed, we need to fail the call</span></div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;      controller-&gt;Finish(status);</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    }</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  }</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;</div><div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a81b29e17de2f6d5e384c392932931659">   93</a></span>&#160;  <span class="keywordtype">void</span>* <a class="code" href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a81b29e17de2f6d5e384c392932931659">Deserialize</a>(<a class="code" href="grpc__types_8h.html#a122f8f4f0a585396d993d9b55848f222">grpc_call</a>* call, <a class="code" href="structgrpc__byte__buffer.html">grpc_byte_buffer</a>* req,</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;                    <a class="code" href="classgrpc_1_1_status.html">Status</a>* status) <span class="keyword">final</span> {</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <a class="code" href="classgrpc_1_1_byte_buffer.html">ByteBuffer</a> buf;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    buf.set_buffer(req);</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    <span class="keyword">auto</span>* request = <span class="keyword">new</span> (<a class="code" href="namespacegrpc.html#abbcecc18dae64c65df0b6d9aa8bf67a8">g_core_codegen_interface</a>-&gt;<a class="code" href="classgrpc_1_1_core_codegen_interface.html#a95637f38b81aeaf75b8868a9e38423c1">grpc_call_arena_alloc</a>(</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        call, <span class="keyword">sizeof</span>(RequestType))) RequestType();</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    *status = <a class="code" href="classgrpc_1_1_serialization_traits.html">SerializationTraits&lt;RequestType&gt;::Deserialize</a>(&amp;buf, request);</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    buf.<a class="code" href="classgrpc_1_1_byte_buffer.html#ae03627c8b3297965fa0cdd4f03a9af0f">Release</a>();</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    <span class="keywordflow">if</span> (status-&gt;ok()) {</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;      <span class="keywordflow">return</span> request;</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    }</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    request-&gt;~RequestType();</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  }</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;  std::function&lt;void(<a class="code" href="classgrpc_1_1_server_context.html">ServerContext</a>*, <span class="keyword">const</span> RequestType*, ResponseType*,</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;                     <a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">experimental::ServerCallbackRpcController</a>*)&gt;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;      func_;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;  <span class="comment">// The implementation class of ServerCallbackRpcController is a private member</span></div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  <span class="comment">// of CallbackUnaryHandler since it is never exposed anywhere, and this allows</span></div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;  <span class="comment">// it to take advantage of CallbackUnaryHandler&#39;s friendships.</span></div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  <span class="keyword">class </span>ServerCallbackRpcControllerImpl</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;      : <span class="keyword">public</span> <a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">experimental::ServerCallbackRpcController</a> {</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;   <span class="keyword">public</span>:</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keywordtype">void</span> Finish(<a class="code" href="classgrpc_1_1_status.html">Status</a> s)<span class="keyword"> override </span>{</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;      finish_tag_.Set(</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;          call_.call(),</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;          [<span class="keyword">this</span>](bool) {</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            <a class="code" href="grpc__types_8h.html#a122f8f4f0a585396d993d9b55848f222">grpc_call</a>* call = call_.call();</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            <span class="keyword">auto</span> call_requester = std::move(call_requester_);</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;            this-&gt;~ServerCallbackRpcControllerImpl();  <span class="comment">// explicitly call</span></div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;                                                       <span class="comment">// destructor</span></div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;            <a class="code" href="namespacegrpc.html#abbcecc18dae64c65df0b6d9aa8bf67a8">g_core_codegen_interface</a>-&gt;<a class="code" href="classgrpc_1_1_core_codegen_interface.html#a40df30e7435089121f7fa03f76031124">grpc_call_unref</a>(call);</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;            call_requester();</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;          },</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;          &amp;finish_buf_);</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;      <span class="keywordflow">if</span> (!ctx_-&gt;sent_initial_metadata_) {</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;        finish_buf_.<a class="code" href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html#aae47dc9b51d25654f3bc5bf36e91c91d">SendInitialMetadata</a>(&amp;ctx_-&gt;initial_metadata_,</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;                                        ctx_-&gt;initial_metadata_flags());</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;        <span class="keywordflow">if</span> (ctx_-&gt;compression_level_set()) {</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;          finish_buf_.set_compression_level(ctx_-&gt;compression_level());</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;        }</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        ctx_-&gt;sent_initial_metadata_ = <span class="keyword">true</span>;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;      }</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;      <span class="comment">// The response is dropped if the status is not OK.</span></div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;      <span class="keywordflow">if</span> (s.<a class="code" href="classgrpc_1_1_status.html#ab80672b5665c32dc0937a0d58a3ce192">ok</a>()) {</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;        finish_buf_.ServerSendStatus(&amp;ctx_-&gt;trailing_metadata_,</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;                                     finish_buf_.SendMessage(resp_));</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;      } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        finish_buf_.ServerSendStatus(&amp;ctx_-&gt;trailing_metadata_, s);</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;      }</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;      finish_buf_.set_core_cq_tag(&amp;finish_tag_);</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;      call_.PerformOps(&amp;finish_buf_);</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    }</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="keywordtype">void</span> SendInitialMetadata(std::function&lt;<span class="keywordtype">void</span>(<span class="keywordtype">bool</span>)&gt; f)<span class="keyword"> override </span>{</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;      <a class="code" href="grpcpp_2impl_2codegen_2core__codegen__interface_8h.html#a39c1421e7081b57c503487659e2653a5">GPR_CODEGEN_ASSERT</a>(!ctx_-&gt;sent_initial_metadata_);</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;      meta_tag_.Set(call_.call(), std::move(f), &amp;meta_buf_);</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;      meta_buf_.SendInitialMetadata(&amp;ctx_-&gt;initial_metadata_,</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;                                    ctx_-&gt;initial_metadata_flags());</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;      <span class="keywordflow">if</span> (ctx_-&gt;compression_level_set()) {</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;        meta_buf_.set_compression_level(ctx_-&gt;compression_level());</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;      }</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;      ctx_-&gt;sent_initial_metadata_ = <span class="keyword">true</span>;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;      meta_buf_.set_core_cq_tag(&amp;meta_tag_);</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;      call_.PerformOps(&amp;meta_buf_);</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    }</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;   <span class="keyword">private</span>:</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">class</span> SrvType, <span class="keyword">class</span> ReqType, <span class="keyword">class</span> RespType&gt;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_callback_unary_handler.html">CallbackUnaryHandler</a>;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    ServerCallbackRpcControllerImpl(<a class="code" href="classgrpc_1_1_server_context.html">ServerContext</a>* ctx, <a class="code" href="classgrpc_1_1internal_1_1_call.html">Call</a>* call,</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;                                    RequestType* req,</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;                                    std::function&lt;<span class="keywordtype">void</span>()&gt; call_requester)</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;        : ctx_(ctx),</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;          call_(*call),</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;          req_(req),</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;          call_requester_(std::move(call_requester)) {}</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    ~ServerCallbackRpcControllerImpl() { req_-&gt;~RequestType(); }</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    RequestType* request() { <span class="keywordflow">return</span> req_; }</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    ResponseType* response() { <span class="keywordflow">return</span> &amp;resp_; }</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <a class="code" href="classgrpc_1_1internal_1_1_call_op_set.html">CallOpSet&lt;CallOpSendInitialMetadata&gt;</a> meta_buf_;</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <a class="code" href="classgrpc_1_1internal_1_1_callback_with_success_tag.html">CallbackWithSuccessTag</a> meta_tag_;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    <a class="code" href="classgrpc_1_1internal_1_1_call_op_set.html">CallOpSet</a>&lt;<a class="code" href="classgrpc_1_1internal_1_1_call_op_send_initial_metadata.html">CallOpSendInitialMetadata</a>, <a class="code" href="classgrpc_1_1internal_1_1_call_op_send_message.html">CallOpSendMessage</a>,</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;              <a class="code" href="classgrpc_1_1internal_1_1_call_op_server_send_status.html">CallOpServerSendStatus</a>&gt;</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;        finish_buf_;</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    <a class="code" href="classgrpc_1_1internal_1_1_callback_with_success_tag.html">CallbackWithSuccessTag</a> finish_tag_;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;    <a class="code" href="classgrpc_1_1_server_context.html">ServerContext</a>* ctx_;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <a class="code" href="classgrpc_1_1internal_1_1_call.html">Call</a> call_;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    RequestType* req_;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    ResponseType resp_;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    std::function&lt;void()&gt; call_requester_;</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;  };</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;};</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;}  <span class="comment">// namespace internal</span></div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;}  <span class="comment">// namespace grpc</span></div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;<span class="preprocessor">#endif  // GRPCPP_IMPL_CODEGEN_SERVER_CALLBACK_H</span></div><div class="ttc" id="grpcpp_2impl_2codegen_2config_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2config_8h.html">config.h</a></div></div>
<div class="ttc" id="grpc__types_8h_html_a122f8f4f0a585396d993d9b55848f222"><div class="ttname"><a href="grpc__types_8h.html#a122f8f4f0a585396d993d9b55848f222">grpc_call</a></div><div class="ttdeci">struct grpc_call grpc_call</div><div class="ttdoc">A Call represents an RPC. </div><div class="ttdef"><b>Definition:</b> grpc_types.h:70</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_callback_unary_handler_html_a41ded2aa0c9018e3e608ffe277c3986e"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a41ded2aa0c9018e3e608ffe277c3986e">grpc::internal::CallbackUnaryHandler::RunHandler</a></div><div class="ttdeci">void RunHandler(const HandlerParameter &amp;param) final</div><div class="ttdef"><b>Definition:</b> server_callback.h:71</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2core__codegen__interface_8h_html_a39c1421e7081b57c503487659e2653a5"><div class="ttname"><a href="grpcpp_2impl_2codegen_2core__codegen__interface_8h.html#a39c1421e7081b57c503487659e2653a5">GPR_CODEGEN_ASSERT</a></div><div class="ttdeci">#define GPR_CODEGEN_ASSERT(x)</div><div class="ttdoc">Codegen specific version of GPR_ASSERT. </div><div class="ttdef"><b>Definition:</b> core_codegen_interface.h:141</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2server__context_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2server__context_8h.html">server_context.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_core_codegen_interface_html_a715e4e7dfab8362f01a8199489215404"><div class="ttname"><a href="classgrpc_1_1_core_codegen_interface.html#a715e4e7dfab8362f01a8199489215404">grpc::CoreCodegenInterface::grpc_call_ref</a></div><div class="ttdeci">virtual void grpc_call_ref(grpc_call *call)=0</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_op_set_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_set.html">grpc::internal::CallOpSet</a></div><div class="ttdoc">Primary implementation of CallOpSetInterface. </div><div class="ttdef"><b>Definition:</b> call_op_set.h:755</div></div>
<div class="ttc" id="classgrpc_1_1_core_codegen_interface_html_a40df30e7435089121f7fa03f76031124"><div class="ttname"><a href="classgrpc_1_1_core_codegen_interface.html#a40df30e7435089121f7fa03f76031124">grpc::CoreCodegenInterface::grpc_call_unref</a></div><div class="ttdeci">virtual void grpc_call_unref(grpc_call *call)=0</div></div>
<div class="ttc" id="classgrpc_1_1experimental_1_1_server_callback_rpc_controller_html_aae47dc9b51d25654f3bc5bf36e91c91d"><div class="ttname"><a href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html#aae47dc9b51d25654f3bc5bf36e91c91d">grpc::experimental::ServerCallbackRpcController::SendInitialMetadata</a></div><div class="ttdeci">virtual void SendInitialMetadata(std::function&lt; void(bool)&gt;)=0</div></div>
<div class="ttc" id="structgrpc__byte__buffer_html"><div class="ttname"><a href="structgrpc__byte__buffer.html">grpc_byte_buffer</a></div><div class="ttdef"><b>Definition:</b> grpc_types.h:40</div></div>
<div class="ttc" id="callback__common_8h_html"><div class="ttname"><a href="callback__common_8h.html">callback_common.h</a></div></div>
<div class="ttc" id="call__op__set_8h_html"><div class="ttname"><a href="call__op__set_8h.html">call_op_set.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_serialization_traits_html"><div class="ttname"><a href="classgrpc_1_1_serialization_traits.html">grpc::SerializationTraits</a></div><div class="ttdoc">Defines how to serialize and deserialize some type. </div><div class="ttdef"><b>Definition:</b> serialization_traits.h:58</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_op_server_send_status_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_server_send_status.html">grpc::internal::CallOpServerSendStatus</a></div><div class="ttdef"><b>Definition:</b> call_op_set.h:563</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_op_send_initial_metadata_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_send_initial_metadata.html">grpc::internal::CallOpSendInitialMetadata</a></div><div class="ttdef"><b>Definition:</b> call_op_set.h:223</div></div>
<div class="ttc" id="classgrpc_1_1_byte_buffer_html_ae03627c8b3297965fa0cdd4f03a9af0f"><div class="ttname"><a href="classgrpc_1_1_byte_buffer.html#ae03627c8b3297965fa0cdd4f03a9af0f">grpc::ByteBuffer::Release</a></div><div class="ttdeci">void Release()</div><div class="ttdoc">Forget underlying byte buffer without destroying Use this only for un-owned byte buffers. </div><div class="ttdef"><b>Definition:</b> byte_buffer.h:125</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_op_send_message_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_send_message.html">grpc::internal::CallOpSendMessage</a></div><div class="ttdef"><b>Definition:</b> call_op_set.h:293</div></div>
<div class="ttc" id="namespacegrpc_html"><div class="ttname"><a href="namespacegrpc.html">grpc</a></div><div class="ttdoc">An Alarm posts the user provided tag to its associated completion queue upon expiry or cancellation...</div><div class="ttdef"><b>Definition:</b> alarm.h:33</div></div>
<div class="ttc" id="namespacegrpc_html_abbcecc18dae64c65df0b6d9aa8bf67a8"><div class="ttname"><a href="namespacegrpc.html#abbcecc18dae64c65df0b6d9aa8bf67a8">grpc::g_core_codegen_interface</a></div><div class="ttdeci">CoreCodegenInterface * g_core_codegen_interface</div><div class="ttdef"><b>Definition:</b> call_op_set.h:50</div></div>
<div class="ttc" id="structgrpc_1_1internal_1_1_method_handler_1_1_handler_parameter_html"><div class="ttname"><a href="structgrpc_1_1internal_1_1_method_handler_1_1_handler_parameter.html">grpc::internal::MethodHandler::HandlerParameter</a></div><div class="ttdef"><b>Definition:</b> rpc_service_method.h:42</div></div>
<div class="ttc" id="classgrpc_1_1_server_context_html"><div class="ttname"><a href="classgrpc_1_1_server_context.html">grpc::ServerContext</a></div><div class="ttdoc">A ServerContext allows the person implementing a service handler to: </div><div class="ttdef"><b>Definition:</b> server_context.h:102</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_callback_unary_handler_html_a00b3bafcc1b66249da2bdc1df9f559d8"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a00b3bafcc1b66249da2bdc1df9f559d8">grpc::internal::CallbackUnaryHandler::CallbackUnaryHandler</a></div><div class="ttdeci">CallbackUnaryHandler(std::function&lt; void(ServerContext *, const RequestType *, ResponseType *, experimental::ServerCallbackRpcController *)&gt; func, ServiceType *service)</div><div class="ttdef"><b>Definition:</b> server_callback.h:65</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_callback_unary_handler_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_unary_handler.html">grpc::internal::CallbackUnaryHandler</a></div><div class="ttdef"><b>Definition:</b> byte_buffer.h:49</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2server__interface_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2server__interface_8h.html">server_interface.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_core_codegen_interface_html_a95637f38b81aeaf75b8868a9e38423c1"><div class="ttname"><a href="classgrpc_1_1_core_codegen_interface.html#a95637f38b81aeaf75b8868a9e38423c1">grpc::CoreCodegenInterface::grpc_call_arena_alloc</a></div><div class="ttdeci">virtual void * grpc_call_arena_alloc(grpc_call *call, size_t length)=0</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_callback_with_success_tag_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_with_success_tag.html">grpc::internal::CallbackWithSuccessTag</a></div><div class="ttdoc">CallbackWithSuccessTag can be reused multiple times, and will be used in this fashion for streaming o...</div><div class="ttdef"><b>Definition:</b> callback_common.h:116</div></div>
<div class="ttc" id="classgrpc_1_1_status_html_ab80672b5665c32dc0937a0d58a3ce192"><div class="ttname"><a href="classgrpc_1_1_status.html#ab80672b5665c32dc0937a0d58a3ce192">grpc::Status::ok</a></div><div class="ttdeci">bool ok() const</div><div class="ttdoc">Is the status OK? </div><div class="ttdef"><b>Definition:</b> status.h:118</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2core__codegen__interface_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2core__codegen__interface_8h.html">core_codegen_interface.h</a></div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2status_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2status_8h.html">status.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_status_html"><div class="ttname"><a href="classgrpc_1_1_status.html">grpc::Status</a></div><div class="ttdoc">Did it work? If it didn&amp;#39;t, why? </div><div class="ttdef"><b>Definition:</b> status.h:31</div></div>
<div class="ttc" id="namespacegrpc_1_1internal_html_a161ad876dc2d4fea93dd8260a7b9b0ae"><div class="ttname"><a href="namespacegrpc_1_1internal.html#a161ad876dc2d4fea93dd8260a7b9b0ae">grpc::internal::CatchingCallback</a></div><div class="ttdeci">void CatchingCallback(Func &amp;&amp;func, Args &amp;&amp;... args)</div><div class="ttdoc">An exception-safe way of invoking a user-specified callback function. </div><div class="ttdef"><b>Definition:</b> callback_common.h:36</div></div>
<div class="ttc" id="classgrpc_1_1experimental_1_1_server_callback_rpc_controller_html"><div class="ttname"><a href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html">grpc::experimental::ServerCallbackRpcController</a></div><div class="ttdef"><b>Definition:</b> server_callback.h:45</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2call_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2call_8h.html">call.h</a></div></div>
<div class="ttc" id="classgrpc_1_1experimental_1_1_server_callback_rpc_controller_html_a0f5d7b42765e734d99e96917570bd855"><div class="ttname"><a href="classgrpc_1_1experimental_1_1_server_callback_rpc_controller.html#a0f5d7b42765e734d99e96917570bd855">grpc::experimental::ServerCallbackRpcController::~ServerCallbackRpcController</a></div><div class="ttdeci">virtual ~ServerCallbackRpcController()</div><div class="ttdef"><b>Definition:</b> server_callback.h:47</div></div>
<div class="ttc" id="classgrpc_1_1_byte_buffer_html"><div class="ttname"><a href="classgrpc_1_1_byte_buffer.html">grpc::ByteBuffer</a></div><div class="ttdoc">A sequence of bytes. </div><div class="ttdef"><b>Definition:</b> byte_buffer.h:62</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_callback_unary_handler_html_a81b29e17de2f6d5e384c392932931659"><div class="ttname"><a href="classgrpc_1_1internal_1_1_callback_unary_handler.html#a81b29e17de2f6d5e384c392932931659">grpc::internal::CallbackUnaryHandler::Deserialize</a></div><div class="ttdeci">void * Deserialize(grpc_call *call, grpc_byte_buffer *req, Status *status) final</div><div class="ttdef"><b>Definition:</b> server_callback.h:93</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call.html">grpc::internal::Call</a></div><div class="ttdoc">Straightforward wrapping of the C call object. </div><div class="ttdef"><b>Definition:</b> call.h:36</div></div>
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