Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2015, Google Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | #import "ProtoRPC.h" |
| 35 | |
Jorge Canizales | 6482d5d | 2015-04-21 01:30:00 -0700 | [diff] [blame^] | 36 | #import <ProtocolBuffers/ProtocolBuffers.h> |
Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 37 | #import <RxLibrary/GRXWriteable.h> |
Jorge Canizales | 6482d5d | 2015-04-21 01:30:00 -0700 | [diff] [blame^] | 38 | #import <RxLibrary/GRXWriter.h> |
| 39 | #import <RxLibrary/GRXWriter+Transformations.h> |
Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 40 | |
| 41 | @implementation ProtoRPC { |
| 42 | id<GRXWriteable> _responseWriteable; |
| 43 | } |
| 44 | |
| 45 | - (instancetype)initWithHost:(NSString *)host |
| 46 | method:(GRPCMethodName *)method |
| 47 | requestsWriter:(id<GRXWriter>)requestWriter { |
| 48 | return [self initWithHost:host |
| 49 | method:method |
| 50 | requestsWriter:requestsWriter |
| 51 | responseClass:nil |
| 52 | responsesWriteable:nil]; |
| 53 | } |
| 54 | |
| 55 | // Designated initializer |
| 56 | - (instancetype)initWithHost:(NSString *)host |
| 57 | method:(GRPCMethodName *)method |
| 58 | requestsWriter:(id<GRXWriter>)requestsWriter |
| 59 | responseClass:(Class)responseClass |
| 60 | responsesWriteable:(id<GRXWriteable>)responsesWriteable { |
| 61 | // Because we can't tell the type system to constrain the class, we need to check at runtime: |
| 62 | if (![class respondsToSelector:@selector(parseFromData:)]) { |
| 63 | [NSException raise:NSInvalidArgumentException |
| 64 | format:@"A protobuf class to parse the responses must be provided."]; |
| 65 | } |
Jorge Canizales | 6482d5d | 2015-04-21 01:30:00 -0700 | [diff] [blame^] | 66 | // A writer that serializes the proto messages to send. |
| 67 | id<GRXWriter> bytesWriter = |
| 68 | [[[GRXWriter alloc] initWithWriter:requestsWriter] map:^id(PBGeneratedMessage *proto) { |
| 69 | return [proto data]; |
| 70 | }]; |
| 71 | if ((self = [super initWithHost:host method:method requestsWriter:bytesWriter])) { |
| 72 | // A writeable that parses the proto messages received. |
Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 73 | _responseWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { |
| 74 | [responsesWriteable didReceiveValue:[responseClass parseFromData:value]]; |
| 75 | } completionHandler:^(NSError *errorOrNil) { |
| 76 | [responsesWriteable didFinishWithError:errorOrNil]; |
| 77 | }]; |
| 78 | } |
| 79 | return self; |
| 80 | } |
| 81 | |
| 82 | - (void)start { |
| 83 | [self startWithWriteable:_responseWriteable]; |
| 84 | } |
| 85 | |
| 86 | - (void)startWithWriteable:(id<GRXWriteable>)writeable { |
| 87 | [super startWithWriteable:writeable]; |
Jorge Canizales | 6482d5d | 2015-04-21 01:30:00 -0700 | [diff] [blame^] | 88 | // Break retain cycles. |
Jorge Canizales | 2779ccb | 2015-04-20 23:42:46 -0700 | [diff] [blame] | 89 | _responseWriteable = nil; |
| 90 | } |
| 91 | @end |