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<a href="grpcpp_2channel_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 2015 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_CHANNEL_H</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#define GRPCPP_CHANNEL_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;memory&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="grpc_8h.html">grpc/grpc.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="grpcpp_2impl_2call_8h.html">grpcpp/impl/call.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="grpcpp_2impl_2codegen_2channel__interface_8h.html">grpcpp/impl/codegen/channel_interface.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_2grpc__library_8h.html">grpcpp/impl/codegen/grpc_library.h</a>&gt;</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">struct </span><a class="code" href="grpc__types_8h.html#a432bfa6b9f6603643cdf9de8804c254e">grpc_channel</a>;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</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"><a class="line" href="classgrpc_1_1_channel.html">   34</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrpc_1_1_channel.html">Channel</a> final : <span class="keyword">public</span> <a class="code" href="classgrpc_1_1_channel_interface.html">ChannelInterface</a>,</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;                      <span class="keyword">public</span> <a class="code" href="classgrpc_1_1internal_1_1_call_hook.html">internal::CallHook</a>,</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;                      <span class="keyword">public</span> std::enable_shared_from_this&lt;Channel&gt;,</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;                      <span class="keyword">private</span> <a class="code" href="classgrpc_1_1_grpc_library_codegen.html">GrpcLibraryCodegen</a> {</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  <a class="code" href="classgrpc_1_1_channel.html#af12754677a599351077d6f68cc0c9159">~Channel</a>();</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;  <a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> <a class="code" href="classgrpc_1_1_channel.html#a646d7a9d01f22037a72092d3a0bf159c">GetState</a>(<span class="keywordtype">bool</span> try_to_connect) <span class="keyword">override</span>;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;  <a class="code" href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a> <a class="code" href="classgrpc_1_1_channel.html#a2cfba5ae4aae03ca016f902b2070a8a8">GetLoadBalancingPolicyName</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;  <a class="code" href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a> <a class="code" href="classgrpc_1_1_channel.html#adeb2242c598bcc5179c90148eb0e289f">GetServiceConfigJSON</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">class</span> InputMessage, <span class="keyword">class</span> OutputMessage&gt;</div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="classgrpc_1_1_channel.html#a9d3d75894c094247a6a89bdd9d9c068d">   54</a></span>&#160;  <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classgrpc_1_1internal_1_1_blocking_unary_call_impl.html">internal::BlockingUnaryCallImpl</a>;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  <span class="keyword">friend</span> std::shared_ptr&lt;Channel&gt; <a class="code" href="classgrpc_1_1_channel.html#acac59a2ab862b1c60832640b741e6440">CreateChannelInternal</a>(</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;      <span class="keyword">const</span> <a class="code" href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a>&amp; host, <a class="code" href="grpc__types_8h.html#a432bfa6b9f6603643cdf9de8804c254e">grpc_channel</a>* c_channel);</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;  <a class="code" href="classgrpc_1_1_channel.html">Channel</a>(<span class="keyword">const</span> <a class="code" href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a>&amp; host, <a class="code" href="grpc__types_8h.html#a432bfa6b9f6603643cdf9de8804c254e">grpc_channel</a>* c_channel);</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;  <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a> CreateCall(<span class="keyword">const</span> <a class="code" href="classgrpc_1_1internal_1_1_rpc_method.html">internal::RpcMethod</a>&amp; method,</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                            <a class="code" href="classgrpc_1_1_client_context.html">ClientContext</a>* context,</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                            <a class="code" href="classgrpc_1_1_completion_queue.html">CompletionQueue</a>* cq) <span class="keyword">override</span>;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;  <span class="keywordtype">void</span> PerformOpsOnCall(<a class="code" href="classgrpc_1_1internal_1_1_call_op_set_interface.html">internal::CallOpSetInterface</a>* ops,</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                        <a class="code" href="classgrpc_1_1internal_1_1_call.html">internal::Call</a>* call) <span class="keyword">override</span>;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;  <span class="keywordtype">void</span>* RegisterMethod(<span class="keyword">const</span> <span class="keywordtype">char</span>* method) <span class="keyword">override</span>;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;  <span class="keywordtype">void</span> NotifyOnStateChangeImpl(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed,</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                               <a class="code" href="structgpr__timespec.html">gpr_timespec</a> deadline, <a class="code" href="classgrpc_1_1_completion_queue.html">CompletionQueue</a>* cq,</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                               <span class="keywordtype">void</span>* tag) <span class="keyword">override</span>;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;  <span class="keywordtype">bool</span> WaitForStateChangeImpl(<a class="code" href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a> last_observed,</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                              <a class="code" href="structgpr__timespec.html">gpr_timespec</a> deadline) <span class="keyword">override</span>;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  <span class="keyword">const</span> <a class="code" href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a> host_;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  <a class="code" href="grpc__types_8h.html#a432bfa6b9f6603643cdf9de8804c254e">grpc_channel</a>* <span class="keyword">const</span> c_channel_;  <span class="comment">// owned</span></div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;};</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;}  <span class="comment">// namespace grpc</span></div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="preprocessor">#endif  // GRPCPP_CHANNEL_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="classgrpc_1_1_channel_html_a2cfba5ae4aae03ca016f902b2070a8a8"><div class="ttname"><a href="classgrpc_1_1_channel.html#a2cfba5ae4aae03ca016f902b2070a8a8">grpc::Channel::GetLoadBalancingPolicyName</a></div><div class="ttdeci">grpc::string GetLoadBalancingPolicyName() const</div><div class="ttdoc">Returns the LB policy name, or the empty string if not yet available. </div></div>
<div class="ttc" id="namespacegrpc_html_ab04a87625da3bf85cdaf5e7856b00203"><div class="ttname"><a href="namespacegrpc.html#ab04a87625da3bf85cdaf5e7856b00203">grpc::string</a></div><div class="ttdeci">std::string string</div><div class="ttdef"><b>Definition:</b> config.h:35</div></div>
<div class="ttc" id="grpc__types_8h_html_a432bfa6b9f6603643cdf9de8804c254e"><div class="ttname"><a href="grpc__types_8h.html#a432bfa6b9f6603643cdf9de8804c254e">grpc_channel</a></div><div class="ttdeci">struct grpc_channel grpc_channel</div><div class="ttdoc">The Channel interface allows creation of Call objects. </div><div class="ttdef"><b>Definition:</b> grpc_types.h:62</div></div>
<div class="ttc" id="classgrpc_1_1_channel_html_adeb2242c598bcc5179c90148eb0e289f"><div class="ttname"><a href="classgrpc_1_1_channel.html#adeb2242c598bcc5179c90148eb0e289f">grpc::Channel::GetServiceConfigJSON</a></div><div class="ttdeci">grpc::string GetServiceConfigJSON() const</div><div class="ttdoc">Returns the service config in JSON form, or the empty string if not available. </div></div>
<div class="ttc" id="classgrpc_1_1_channel_html_af12754677a599351077d6f68cc0c9159"><div class="ttname"><a href="classgrpc_1_1_channel.html#af12754677a599351077d6f68cc0c9159">grpc::Channel::~Channel</a></div><div class="ttdeci">~Channel()</div></div>
<div class="ttc" id="classgrpc_1_1_grpc_library_codegen_html"><div class="ttname"><a href="classgrpc_1_1_grpc_library_codegen.html">grpc::GrpcLibraryCodegen</a></div><div class="ttdoc">Classes that require gRPC to be initialized should inherit from this class. </div><div class="ttdef"><b>Definition:</b> grpc_library.h:38</div></div>
<div class="ttc" id="classgrpc_1_1_client_context_html"><div class="ttname"><a href="classgrpc_1_1_client_context.html">grpc::ClientContext</a></div><div class="ttdoc">A ClientContext allows the person implementing a service client to: </div><div class="ttdef"><b>Definition:</b> client_context.h:162</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_rpc_method_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_rpc_method.html">grpc::internal::RpcMethod</a></div><div class="ttdoc">Descriptor of an RPC method. </div><div class="ttdef"><b>Definition:</b> rpc_method.h:29</div></div>
<div class="ttc" id="connectivity__state_8h_html_a065b65f5cdd062a67d82e2b6bcf68cf2"><div class="ttname"><a href="connectivity__state_8h.html#a065b65f5cdd062a67d82e2b6bcf68cf2">grpc_connectivity_state</a></div><div class="ttdeci">grpc_connectivity_state</div><div class="ttdoc">Connectivity state of a channel. </div><div class="ttdef"><b>Definition:</b> connectivity_state.h:27</div></div>
<div class="ttc" id="classgrpc_1_1_channel_html_acac59a2ab862b1c60832640b741e6440"><div class="ttname"><a href="classgrpc_1_1_channel.html#acac59a2ab862b1c60832640b741e6440">grpc::Channel::CreateChannelInternal</a></div><div class="ttdeci">friend std::shared_ptr&lt; Channel &gt; CreateChannelInternal(const grpc::string &amp;host, grpc_channel *c_channel)</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:31</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2grpc__library_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2grpc__library_8h.html">grpc_library.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_channel_interface_html"><div class="ttname"><a href="classgrpc_1_1_channel_interface.html">grpc::ChannelInterface</a></div><div class="ttdoc">Codegen interface for grpc::Channel. </div><div class="ttdef"><b>Definition:</b> channel_interface.h:55</div></div>
<div class="ttc" id="grpcpp_2impl_2codegen_2channel__interface_8h_html"><div class="ttname"><a href="grpcpp_2impl_2codegen_2channel__interface_8h.html">channel_interface.h</a></div></div>
<div class="ttc" id="grpcpp_2impl_2call_8h_html"><div class="ttname"><a href="grpcpp_2impl_2call_8h.html">call.h</a></div></div>
<div class="ttc" id="classgrpc_1_1_completion_queue_html"><div class="ttname"><a href="classgrpc_1_1_completion_queue.html">grpc::CompletionQueue</a></div><div class="ttdoc">A thin wrapper around grpc_completion_queue (see src/core/lib/surface/completion_queue.h). </div><div class="ttdef"><b>Definition:</b> completion_queue.h:94</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_op_set_interface_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_op_set_interface.html">grpc::internal::CallOpSetInterface</a></div><div class="ttdoc">An abstract collection of call ops, used to generate the grpc_call_op structure to pass down to the l...</div><div class="ttdef"><b>Definition:</b> call.h:603</div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_blocking_unary_call_impl_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_blocking_unary_call_impl.html">grpc::internal::BlockingUnaryCallImpl</a></div><div class="ttdef"><b>Definition:</b> channel_interface.h:43</div></div>
<div class="ttc" id="structgpr__timespec_html"><div class="ttname"><a href="structgpr__timespec.html">gpr_timespec</a></div><div class="ttdoc">Analogous to struct timespec. </div><div class="ttdef"><b>Definition:</b> gpr_types.h:47</div></div>
<div class="ttc" id="classgrpc_1_1_channel_html_a646d7a9d01f22037a72092d3a0bf159c"><div class="ttname"><a href="classgrpc_1_1_channel.html#a646d7a9d01f22037a72092d3a0bf159c">grpc::Channel::GetState</a></div><div class="ttdeci">grpc_connectivity_state GetState(bool try_to_connect) override</div><div class="ttdoc">Get the current channel state. </div></div>
<div class="ttc" id="classgrpc_1_1internal_1_1_call_hook_html"><div class="ttname"><a href="classgrpc_1_1internal_1_1_call_hook.html">grpc::internal::CallHook</a></div><div class="ttdoc">This is an interface that Channel and Server implement to allow them to hook performing ops...</div><div class="ttdef"><b>Definition:</b> call_hook.h:30</div></div>
<div class="ttc" id="grpc_8h_html"><div class="ttname"><a href="grpc_8h.html">grpc.h</a></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:660</div></div>
<div class="ttc" id="classgrpc_1_1_channel_html"><div class="ttname"><a href="classgrpc_1_1_channel.html">grpc::Channel</a></div><div class="ttdoc">Channels represent a connection to an endpoint. Created by CreateChannel. </div><div class="ttdef"><b>Definition:</b> channel.h:34</div></div>
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