1 <?php 2 /* 3 * 4 * Copyright 2018 gRPC authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 */ 19 20 namespace Grpc; 21 22 /** 23 * Represents an interceptor that intercept RPC invocations before call starts. 24 * There is one proposal related to the argument $deserialize under the review. 25 * The proposal link is https://github.com/grpc/proposal/pull/86. 26 * This is an EXPERIMENTAL API. 27 */ 28 class Interceptor 29 { 30 public function interceptUnaryUnary( 31 $method, 32 $argument, 33 $deserialize, 34 array $metadata = [], 35 array $options = [], 36 $continuation 37 ) { 38 return $continuation($method, $argument, $deserialize, $metadata, $options); 39 } 40 41 public function interceptStreamUnary( 42 $method, 43 $deserialize, 44 array $metadata = [], 45 array $options = [], 46 $continuation 47 ) { 48 return $continuation($method, $deserialize, $metadata, $options); 49 } 50 51 public function interceptUnaryStream( 52 $method, 53 $argument, 54 $deserialize, 55 array $metadata = [], 56 array $options = [], 57 $continuation 58 ) { 59 return $continuation($method, $argument, $deserialize, $metadata, $options); 60 } 61 62 public function interceptStreamStream( 63 $method, 64 $deserialize, 65 array $metadata = [], 66 array $options = [], 67 $continuation 68 ) { 69 return $continuation($method, $deserialize, $metadata, $options); 70 } 71 72 /** 73 * Intercept the methods with Channel 74 * 75 * @param Channel|InterceptorChannel $channel An already created Channel or InterceptorChannel object (optional) 76 * @param Interceptor|Interceptor[] $interceptors interceptors to be added 77 * 78 * @return InterceptorChannel 79 */ 80 public static function intercept($channel, $interceptors) 81 { 82 if (is_array($interceptors)) { 83 for ($i = count($interceptors) - 1; $i >= 0; $i--) { 84 $channel = new Internal\InterceptorChannel($channel, $interceptors[$i]); 85 } 86 } else { 87 $channel = new Internal\InterceptorChannel($channel, $interceptors); 88 } 89 return $channel; 90 } 91 } 92 93
