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    137. 

  137.   <h1>Source code for grpc.framework.interfaces.face.utilities</h1><div class="highlight"><pre>
    138. 

  138. <span class="c"># Copyright 2015, Google Inc.</span>
    139. 

  139. <span class="c"># All rights reserved.</span>
    140. 

  140. <span class="c">#</span>
    141. 

  141. <span class="c"># Redistribution and use in source and binary forms, with or without</span>
    142. 

  142. <span class="c"># modification, are permitted provided that the following conditions are</span>
    143. 

  143. <span class="c"># met:</span>
    144. 

  144. <span class="c">#</span>
    145. 

  145. <span class="c">#     * Redistributions of source code must retain the above copyright</span>
    146. 

  146. <span class="c"># notice, this list of conditions and the following disclaimer.</span>
    147. 

  147. <span class="c">#     * Redistributions in binary form must reproduce the above</span>
    148. 

  148. <span class="c"># copyright notice, this list of conditions and the following disclaimer</span>
    149. 

  149. <span class="c"># in the documentation and/or other materials provided with the</span>
    150. 

  150. <span class="c"># distribution.</span>
    151. 

  151. <span class="c">#     * Neither the name of Google Inc. nor the names of its</span>
    152. 

  152. <span class="c"># contributors may be used to endorse or promote products derived from</span>
    153. 

  153. <span class="c"># this software without specific prior written permission.</span>
    154. 

  154. <span class="c">#</span>
    155. 

  155. <span class="c"># THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
    156. 

  156. <span class="c"># &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
    157. 

  157. <span class="c"># LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
    158. 

  158. <span class="c"># A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
    159. 

  159. <span class="c"># OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
    160. 

  160. <span class="c"># SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
    161. 

  161. <span class="c"># LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span>
    162. 

  162. <span class="c"># DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span>
    163. 

  163. <span class="c"># THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
    164. 

  164. <span class="c"># (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
    165. 

  165. <span class="c"># OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
    166. 

  166. 

  167. <span class="sd">&quot;&quot;&quot;Utilities for RPC Framework&#39;s Face interface.&quot;&quot;&quot;</span>
    168. 

  168. 

  169. <span class="kn">import</span> <span class="nn">collections</span>
    170. 

  170. 

  171. <span class="c"># stream is referenced from specification in this module.</span>
    172. 

  172. <span class="kn">from</span> <span class="nn">grpc.framework.common</span> <span class="kn">import</span> <span class="n">cardinality</span>
    173. 

  173. <span class="kn">from</span> <span class="nn">grpc.framework.common</span> <span class="kn">import</span> <span class="n">style</span>
    174. 

  174. <span class="kn">from</span> <span class="nn">grpc.framework.foundation</span> <span class="kn">import</span> <span class="n">stream</span>  <span class="c"># pylint: disable=unused-import</span>
    175. 

  175. <span class="kn">from</span> <span class="nn">grpc.framework.interfaces.face</span> <span class="kn">import</span> <span class="n">face</span>
    176. 

  176. 

  177. 

  178. <span class="k">class</span> <span class="nc">_MethodImplementation</span><span class="p">(</span>
    179. 

  179.     <span class="n">face</span><span class="o">.</span><span class="n">MethodImplementation</span><span class="p">,</span>
    180. 

  180.     <span class="n">collections</span><span class="o">.</span><span class="n">namedtuple</span><span class="p">(</span>
    181. 

  181.         <span class="s">&#39;_MethodImplementation&#39;</span><span class="p">,</span>
    182. 

  182.         <span class="p">[</span><span class="s">&#39;cardinality&#39;</span><span class="p">,</span> <span class="s">&#39;style&#39;</span><span class="p">,</span> <span class="s">&#39;unary_unary_inline&#39;</span><span class="p">,</span> <span class="s">&#39;unary_stream_inline&#39;</span><span class="p">,</span>
    183. 

  183.          <span class="s">&#39;stream_unary_inline&#39;</span><span class="p">,</span> <span class="s">&#39;stream_stream_inline&#39;</span><span class="p">,</span> <span class="s">&#39;unary_unary_event&#39;</span><span class="p">,</span>
    184. 

  184.          <span class="s">&#39;unary_stream_event&#39;</span><span class="p">,</span> <span class="s">&#39;stream_unary_event&#39;</span><span class="p">,</span> <span class="s">&#39;stream_stream_event&#39;</span><span class="p">,])):</span>
    185. 

  185.   <span class="k">pass</span>
    186. 

  186. 

  187. 

  188. <div class="viewcode-block" id="unary_unary_inline"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.unary_unary_inline">[docs]</a><span class="k">def</span> <span class="nf">unary_unary_inline</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    189. 

  189.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    190. 

  190. 

  191. <span class="sd">  Args:</span>
    192. 

  192. <span class="sd">    behavior: The implementation of a unary-unary RPC method as a callable value</span>
    193. 

  193. <span class="sd">      that takes a request value and an face.ServicerContext object and</span>
    194. 

  194. <span class="sd">      returns a response value.</span>
    195. 

  195. 

  196. <span class="sd">  Returns:</span>
    197. 

  197. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    198. 

  198. <span class="sd">  &quot;&quot;&quot;</span>
    199. 

  199.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    200. 

  200.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">UNARY_UNARY</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">INLINE</span><span class="p">,</span> <span class="n">behavior</span><span class="p">,</span>
    201. 

  201.       <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    202. 

  202. 

  203. </div>
    204. 

  204. <div class="viewcode-block" id="unary_stream_inline"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.unary_stream_inline">[docs]</a><span class="k">def</span> <span class="nf">unary_stream_inline</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    205. 

  205.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    206. 

  206. 

  207. <span class="sd">  Args:</span>
    208. 

  208. <span class="sd">    behavior: The implementation of a unary-stream RPC method as a callable</span>
    209. 

  209. <span class="sd">      value that takes a request value and an face.ServicerContext object and</span>
    210. 

  210. <span class="sd">      returns an iterator of response values.</span>
    211. 

  211. 

  212. <span class="sd">  Returns:</span>
    213. 

  213. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    214. 

  214. <span class="sd">  &quot;&quot;&quot;</span>
    215. 

  215.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    216. 

  216.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">UNARY_STREAM</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">INLINE</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    217. 

  217.       <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    218. 

  218. 

  219. </div>
    220. 

  220. <div class="viewcode-block" id="stream_unary_inline"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.stream_unary_inline">[docs]</a><span class="k">def</span> <span class="nf">stream_unary_inline</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    221. 

  221.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    222. 

  222. 

  223. <span class="sd">  Args:</span>
    224. 

  224. <span class="sd">    behavior: The implementation of a stream-unary RPC method as a callable</span>
    225. 

  225. <span class="sd">      value that takes an iterator of request values and an</span>
    226. 

  226. <span class="sd">      face.ServicerContext object and returns a response value.</span>
    227. 

  227. 

  228. <span class="sd">  Returns:</span>
    229. 

  229. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    230. 

  230. <span class="sd">  &quot;&quot;&quot;</span>
    231. 

  231.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    232. 

  232.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">STREAM_UNARY</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">INLINE</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    233. 

  233.       <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    234. 

  234. 

  235. </div>
    236. 

  236. <div class="viewcode-block" id="stream_stream_inline"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.stream_stream_inline">[docs]</a><span class="k">def</span> <span class="nf">stream_stream_inline</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    237. 

  237.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    238. 

  238. 

  239. <span class="sd">  Args:</span>
    240. 

  240. <span class="sd">    behavior: The implementation of a stream-stream RPC method as a callable</span>
    241. 

  241. <span class="sd">      value that takes an iterator of request values and an</span>
    242. 

  242. <span class="sd">      face.ServicerContext object and returns an iterator of response values.</span>
    243. 

  243. 

  244. <span class="sd">  Returns:</span>
    245. 

  245. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    246. 

  246. <span class="sd">  &quot;&quot;&quot;</span>
    247. 

  247.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    248. 

  248.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">STREAM_STREAM</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">INLINE</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    249. 

  249.       <span class="bp">None</span><span class="p">,</span> <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    250. 

  250. 

  251. </div>
    252. 

  252. <div class="viewcode-block" id="unary_unary_event"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.unary_unary_event">[docs]</a><span class="k">def</span> <span class="nf">unary_unary_event</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    253. 

  253.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    254. 

  254. 

  255. <span class="sd">  Args:</span>
    256. 

  256. <span class="sd">    behavior: The implementation of a unary-unary RPC method as a callable</span>
    257. 

  257. <span class="sd">      value that takes a request value, a response callback to which to pass</span>
    258. 

  258. <span class="sd">      the response value of the RPC, and an face.ServicerContext.</span>
    259. 

  259. 

  260. <span class="sd">  Returns:</span>
    261. 

  261. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    262. 

  262. <span class="sd">  &quot;&quot;&quot;</span>
    263. 

  263.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    264. 

  264.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">UNARY_UNARY</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">EVENT</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    265. 

  265.       <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    266. 

  266. 

  267. </div>
    268. 

  268. <div class="viewcode-block" id="unary_stream_event"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.unary_stream_event">[docs]</a><span class="k">def</span> <span class="nf">unary_stream_event</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    269. 

  269.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    270. 

  270. 

  271. <span class="sd">  Args:</span>
    272. 

  272. <span class="sd">    behavior: The implementation of a unary-stream RPC method as a callable</span>
    273. 

  273. <span class="sd">      value that takes a request value, a stream.Consumer to which to pass the</span>
    274. 

  274. <span class="sd">      the response values of the RPC, and an face.ServicerContext.</span>
    275. 

  275. 

  276. <span class="sd">  Returns:</span>
    277. 

  277. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    278. 

  278. <span class="sd">  &quot;&quot;&quot;</span>
    279. 

  279.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    280. 

  280.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">UNARY_STREAM</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">EVENT</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    281. 

  281.       <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    282. 

  282. 

  283. </div>
    284. 

  284. <div class="viewcode-block" id="stream_unary_event"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.stream_unary_event">[docs]</a><span class="k">def</span> <span class="nf">stream_unary_event</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    285. 

  285.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    286. 

  286. 

  287. <span class="sd">  Args:</span>
    288. 

  288. <span class="sd">    behavior: The implementation of a stream-unary RPC method as a callable</span>
    289. 

  289. <span class="sd">      value that takes a response callback to which to pass the response value</span>
    290. 

  290. <span class="sd">      of the RPC and an face.ServicerContext and returns a stream.Consumer to</span>
    291. 

  291. <span class="sd">      which the request values of the RPC should be passed.</span>
    292. 

  292. 

  293. <span class="sd">  Returns:</span>
    294. 

  294. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    295. 

  295. <span class="sd">  &quot;&quot;&quot;</span>
    296. 

  296.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    297. 

  297.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">STREAM_UNARY</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">EVENT</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    298. 

  298.       <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">behavior</span><span class="p">,</span> <span class="bp">None</span><span class="p">)</span>
    299. 

  299. 

  300. </div>
    301. 

  301. <div class="viewcode-block" id="stream_stream_event"><a class="viewcode-back" href="../../../../../grpc.framework.interfaces.face.html#grpc.framework.interfaces.face.utilities.stream_stream_event">[docs]</a><span class="k">def</span> <span class="nf">stream_stream_event</span><span class="p">(</span><span class="n">behavior</span><span class="p">):</span>
    302. 

  302.   <span class="sd">&quot;&quot;&quot;Creates an face.MethodImplementation for the given behavior.</span>
    303. 

  303. 

  304. <span class="sd">  Args:</span>
    305. 

  305. <span class="sd">    behavior: The implementation of a stream-stream RPC method as a callable</span>
    306. 

  306. <span class="sd">      value that takes a stream.Consumer to which to pass the response values</span>
    307. 

  307. <span class="sd">      of the RPC and an face.ServicerContext and returns a stream.Consumer to</span>
    308. 

  308. <span class="sd">      which the request values of the RPC should be passed.</span>
    309. 

  309. 

  310. <span class="sd">  Returns:</span>
    311. 

  311. <span class="sd">    An face.MethodImplementation derived from the given behavior.</span>
    312. 

  312. <span class="sd">  &quot;&quot;&quot;</span>
    313. 

  313.   <span class="k">return</span> <span class="n">_MethodImplementation</span><span class="p">(</span>
    314. 

  314.       <span class="n">cardinality</span><span class="o">.</span><span class="n">Cardinality</span><span class="o">.</span><span class="n">STREAM_STREAM</span><span class="p">,</span> <span class="n">style</span><span class="o">.</span><span class="n">Service</span><span class="o">.</span><span class="n">EVENT</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span>
    315. 

  315.       <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="bp">None</span><span class="p">,</span> <span class="n">behavior</span><span class="p">)</span></div>
    316. 

  316. </pre></div>
    317. 

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