diff options
author | 2015-07-06 10:26:03 -0700 | |
---|---|---|
committer | 2015-07-06 10:26:03 -0700 | |
commit | 377881204fe380d927086a4a86737c1a97f27ea0 (patch) | |
tree | be40960c7e2ddbd905aa76e3eaf32558d81642f6 /src/objective-c | |
parent | 825b21cd1f999fa55e6234c2d0d8a6375f252c42 (diff) | |
parent | 3f2db5a4a19427d1c33dec5a1c917ab44b1d2d8b (diff) |
Merge branch 'reset-thy-counts-or-fear-my-wrath' into tis-but-thy-name
Diffstat (limited to 'src/objective-c')
-rw-r--r-- | src/objective-c/GRPCClient/GRPCCall.h | 4 | ||||
-rw-r--r-- | src/objective-c/GRPCClient/GRPCCall.m | 10 | ||||
-rw-r--r-- | src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.h | 40 | ||||
-rw-r--r-- | src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m | 44 | ||||
-rw-r--r-- | src/objective-c/GRPCClient/private/GRPCWrappedCall.h | 2 | ||||
-rw-r--r-- | src/objective-c/GRPCClient/private/GRPCWrappedCall.m | 8 | ||||
-rw-r--r-- | src/objective-c/ProtoRPC/ProtoMethod.h (renamed from src/objective-c/GRPCClient/GRPCMethodName.h) | 17 | ||||
-rw-r--r-- | src/objective-c/ProtoRPC/ProtoMethod.m (renamed from src/objective-c/GRPCClient/GRPCMethodName.m) | 16 | ||||
-rw-r--r-- | src/objective-c/ProtoRPC/ProtoRPC.h | 4 | ||||
-rw-r--r-- | src/objective-c/ProtoRPC/ProtoRPC.m | 17 | ||||
-rw-r--r-- | src/objective-c/ProtoRPC/ProtoService.m | 8 | ||||
-rw-r--r-- | src/objective-c/tests/GRPCClientTests.m | 34 | ||||
-rw-r--r-- | src/objective-c/tests/LocalClearTextTests.m | 18 |
13 files changed, 72 insertions, 150 deletions
diff --git a/src/objective-c/GRPCClient/GRPCCall.h b/src/objective-c/GRPCClient/GRPCCall.h index 33aae10747..cba53fa2f6 100644 --- a/src/objective-c/GRPCClient/GRPCCall.h +++ b/src/objective-c/GRPCClient/GRPCCall.h @@ -48,8 +48,6 @@ #import <Foundation/Foundation.h> #import <RxLibrary/GRXWriter.h> -@class GRPCMethodName; - // Key used in |NSError|'s |userInfo| dictionary to store the response metadata sent by the server. extern id const kGRPCStatusMetadataKey; @@ -90,7 +88,7 @@ extern id const kGRPCStatusMetadataKey; // the specific remote method called). // To finish a call right away, invoke cancel. - (instancetype)initWithHost:(NSString *)host - method:(GRPCMethodName *)method + path:(NSString *)path requestsWriter:(id<GRXWriter>)requestsWriter NS_DESIGNATED_INITIALIZER; // Finishes the request side of this call, notifies the server that the RPC diff --git a/src/objective-c/GRPCClient/GRPCCall.m b/src/objective-c/GRPCClient/GRPCCall.m index 77eebeff76..4ac4e4d37f 100644 --- a/src/objective-c/GRPCClient/GRPCCall.m +++ b/src/objective-c/GRPCClient/GRPCCall.m @@ -36,11 +36,9 @@ #include <grpc/grpc.h> #include <grpc/support/time.h> -#import "GRPCMethodName.h" #import "private/GRPCChannel.h" #import "private/GRPCCompletionQueue.h" #import "private/GRPCDelegateWrapper.h" -#import "private/GRPCMethodName+HTTP2Encoding.h" #import "private/GRPCWrappedCall.h" #import "private/NSData+GRPC.h" #import "private/NSDictionary+GRPC.h" @@ -90,14 +88,14 @@ NSString * const kGRPCStatusMetadataKey = @"io.grpc.StatusMetadataKey"; @synthesize state = _state; - (instancetype)init { - return [self initWithHost:nil method:nil requestsWriter:nil]; + return [self initWithHost:nil path:nil requestsWriter:nil]; } // Designated initializer - (instancetype)initWithHost:(NSString *)host - method:(GRPCMethodName *)method + path:(NSString *)path requestsWriter:(id<GRXWriter>)requestWriter { - if (!host || !method) { + if (!host || !path) { [NSException raise:NSInvalidArgumentException format:@"Neither host nor method can be nil."]; } if (requestWriter.state != GRXWriterStateNotStarted) { @@ -114,7 +112,7 @@ NSString * const kGRPCStatusMetadataKey = @"io.grpc.StatusMetadataKey"; _channel = [GRPCChannel channelToHost:host]; _wrappedCall = [[GRPCWrappedCall alloc] initWithChannel:_channel - method:method.HTTP2Path + path:path host:host]; // Serial queue to invoke the non-reentrant methods of the grpc_call object. diff --git a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.h b/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.h deleted file mode 100644 index 81c80f2a49..0000000000 --- a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.h +++ /dev/null @@ -1,40 +0,0 @@ -/* - * - * Copyright 2015, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#import <Foundation/Foundation.h> - -#import "GRPCClient/GRPCMethodName.h" - -@interface GRPCMethodName (HTTP2Encoding) -- (NSString *)HTTP2Path; -@end diff --git a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m b/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m deleted file mode 100644 index 3ad757fb29..0000000000 --- a/src/objective-c/GRPCClient/private/GRPCMethodName+HTTP2Encoding.m +++ /dev/null @@ -1,44 +0,0 @@ -/* - * - * Copyright 2015, Google Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above - * copyright notice, this list of conditions and the following disclaimer - * in the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Google Inc. nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - */ - -#import "GRPCMethodName+HTTP2Encoding.h" - -@implementation GRPCMethodName (HTTP2Encoding) -- (NSString *)HTTP2Path { - if (self.package) { - return [NSString stringWithFormat:@"/%@.%@/%@", self.package, self.interface, self.method]; - } else { - return [NSString stringWithFormat:@"/%@/%@", self.interface, self.method]; - } -} -@end diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h index c08aefc6a8..18f8bb5531 100644 --- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.h +++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.h @@ -84,7 +84,7 @@ @interface GRPCWrappedCall : NSObject - (instancetype)initWithChannel:(GRPCChannel *)channel - method:(NSString *)method + path:(NSString *)path host:(NSString *)host NS_DESIGNATED_INITIALIZER; - (void)startBatchWithOperations:(NSArray *)ops errorHandler:(void(^)())errorHandler; diff --git a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m index d94b25091e..45f10f5d63 100644 --- a/src/objective-c/GRPCClient/private/GRPCWrappedCall.m +++ b/src/objective-c/GRPCClient/private/GRPCWrappedCall.m @@ -225,13 +225,13 @@ } - (instancetype)init { - return [self initWithChannel:nil method:nil host:nil]; + return [self initWithChannel:nil path:nil host:nil]; } - (instancetype)initWithChannel:(GRPCChannel *)channel - method:(NSString *)method + path:(NSString *)path host:(NSString *)host { - if (!channel || !method || !host) { + if (!channel || !path || !host) { [NSException raise:NSInvalidArgumentException format:@"channel, method, and host cannot be nil."]; } @@ -247,7 +247,7 @@ return nil; } _call = grpc_channel_create_call(channel.unmanagedChannel, _queue.unmanagedQueue, - method.UTF8String, host.UTF8String, gpr_inf_future); + path.UTF8String, host.UTF8String, gpr_inf_future); if (_call == NULL) { return nil; } diff --git a/src/objective-c/GRPCClient/GRPCMethodName.h b/src/objective-c/ProtoRPC/ProtoMethod.h index fe153dd478..8f554a0483 100644 --- a/src/objective-c/GRPCClient/GRPCMethodName.h +++ b/src/objective-c/ProtoRPC/ProtoMethod.h @@ -33,17 +33,16 @@ #import <Foundation/Foundation.h> -// See the README file for an introduction to this library. - -// A fully-qualified gRPC method name. Full qualification is needed because a gRPC endpoint can -// implement multiple interfaces. -// TODO(jcanizales): Move to ProtoRPC package. -// TODO(jcanizales): Rename interface -> service. -@interface GRPCMethodName : NSObject +// A fully-qualified proto service method name. Full qualification is needed because a gRPC endpoint +// can implement multiple services. +@interface ProtoMethod : NSObject @property(nonatomic, readonly) NSString *package; -@property(nonatomic, readonly) NSString *interface; +@property(nonatomic, readonly) NSString *service; @property(nonatomic, readonly) NSString *method; + +@property(nonatomic, readonly) NSString *HTTPPath; + - (instancetype)initWithPackage:(NSString *)package - interface:(NSString *)interface + service:(NSString *)service method:(NSString *)method; @end diff --git a/src/objective-c/GRPCClient/GRPCMethodName.m b/src/objective-c/ProtoRPC/ProtoMethod.m index 96724073a5..1113b4fbaa 100644 --- a/src/objective-c/GRPCClient/GRPCMethodName.m +++ b/src/objective-c/ProtoRPC/ProtoMethod.m @@ -31,17 +31,25 @@ * */ -#import "GRPCMethodName.h" +#import "ProtoMethod.h" -@implementation GRPCMethodName +@implementation ProtoMethod - (instancetype)initWithPackage:(NSString *)package - interface:(NSString *)interface + service:(NSString *)service method:(NSString *)method { if ((self = [super init])) { _package = [package copy]; - _interface = [interface copy]; + _service = [service copy]; _method = [method copy]; } return self; } + +- (NSString *)HTTPPath { + if (_package) { + return [NSString stringWithFormat:@"/%@.%@/%@", _package, _service, _method]; + } else { + return [NSString stringWithFormat:@"/%@/%@", _service, _method]; + } +} @end diff --git a/src/objective-c/ProtoRPC/ProtoRPC.h b/src/objective-c/ProtoRPC/ProtoRPC.h index a383310619..fcc0a507fe 100644 --- a/src/objective-c/ProtoRPC/ProtoRPC.h +++ b/src/objective-c/ProtoRPC/ProtoRPC.h @@ -34,10 +34,12 @@ #import <Foundation/Foundation.h> #import <GRPCClient/GRPCCall.h> +#import "ProtoMethod.h" + @interface ProtoRPC : GRPCCall - (instancetype)initWithHost:(NSString *)host - method:(GRPCMethodName *)method + method:(ProtoMethod *)method requestsWriter:(id<GRXWriter>)requestsWriter responseClass:(Class)responseClass responsesWriteable:(id<GRXWriteable>)responsesWriteable NS_DESIGNATED_INITIALIZER; diff --git a/src/objective-c/ProtoRPC/ProtoRPC.m b/src/objective-c/ProtoRPC/ProtoRPC.m index 4da646d7b4..fe3ccf0541 100644 --- a/src/objective-c/ProtoRPC/ProtoRPC.m +++ b/src/objective-c/ProtoRPC/ProtoRPC.m @@ -42,19 +42,20 @@ id<GRXWriteable> _responseWriteable; } +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wobjc-designated-initializers" - (instancetype)initWithHost:(NSString *)host - method:(GRPCMethodName *)method + path:(NSString *)path requestsWriter:(id<GRXWriter>)requestsWriter { - return [self initWithHost:host - method:method - requestsWriter:requestsWriter - responseClass:nil - responsesWriteable:nil]; + [NSException raise:NSInvalidArgumentException + format:@"Please use ProtoRPC's designated initializer instead."]; + return nil; } +#pragma clang diagnostic pop // Designated initializer - (instancetype)initWithHost:(NSString *)host - method:(GRPCMethodName *)method + method:(ProtoMethod *)method requestsWriter:(id<GRXWriter>)requestsWriter responseClass:(Class)responseClass responsesWriteable:(id<GRXWriteable>)responsesWriteable { @@ -70,7 +71,7 @@ // sending GPBMessages. return [proto data]; }]; - if ((self = [super initWithHost:host method:method requestsWriter:bytesWriter])) { + if ((self = [super initWithHost:host path:method.HTTPPath requestsWriter:bytesWriter])) { // A writeable that parses the proto messages received. _responseWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { [responsesWriteable writeValue:[responseClass parseFromData:value error:NULL]]; diff --git a/src/objective-c/ProtoRPC/ProtoService.m b/src/objective-c/ProtoRPC/ProtoService.m index 47bdb5dc6e..d7c5b6a850 100644 --- a/src/objective-c/ProtoRPC/ProtoService.m +++ b/src/objective-c/ProtoRPC/ProtoService.m @@ -33,10 +33,10 @@ #import "ProtoService.h" -#import <GRPCClient/GRPCMethodName.h> #import <RxLibrary/GRXWriteable.h> #import <RxLibrary/GRXWriter.h> +#import "ProtoMethod.h" #import "ProtoRPC.h" @implementation ProtoService { @@ -69,9 +69,9 @@ requestsWriter:(id<GRXWriter>)requestsWriter responseClass:(Class)responseClass responsesWriteable:(id<GRXWriteable>)responsesWriteable { - GRPCMethodName *methodName = [[GRPCMethodName alloc] initWithPackage:_packageName - interface:_serviceName - method:method]; + ProtoMethod *methodName = [[ProtoMethod alloc] initWithPackage:_packageName + service:_serviceName + method:method]; return [[ProtoRPC alloc] initWithHost:_host method:methodName requestsWriter:requestsWriter diff --git a/src/objective-c/tests/GRPCClientTests.m b/src/objective-c/tests/GRPCClientTests.m index e421127ea1..f9c2d5d8d6 100644 --- a/src/objective-c/tests/GRPCClientTests.m +++ b/src/objective-c/tests/GRPCClientTests.m @@ -35,7 +35,7 @@ #import <XCTest/XCTest.h> #import <GRPCClient/GRPCCall.h> -#import <GRPCClient/GRPCMethodName.h> +#import <ProtoRPC/ProtoMethod.h> #import <RemoteTest/Messages.pbobjc.h> #import <RxLibrary/GRXWriteable.h> #import <RxLibrary/GRXWriter+Immediate.h> @@ -47,9 +47,9 @@ static NSString * const kHostAddress = @"grpc-test.sandbox.google.com"; static NSString * const kPackage = @"grpc.testing"; static NSString * const kService = @"TestService"; -static GRPCMethodName *kInexistentMethod; -static GRPCMethodName *kEmptyCallMethod; -static GRPCMethodName *kUnaryCallMethod; +static ProtoMethod *kInexistentMethod; +static ProtoMethod *kEmptyCallMethod; +static ProtoMethod *kUnaryCallMethod; @interface GRPCClientTests : XCTestCase @end @@ -58,22 +58,22 @@ static GRPCMethodName *kUnaryCallMethod; - (void)setUp { // This method isn't implemented by the remote server. - kInexistentMethod = [[GRPCMethodName alloc] initWithPackage:kPackage - interface:kService - method:@"Inexistent"]; - kEmptyCallMethod = [[GRPCMethodName alloc] initWithPackage:kPackage - interface:kService - method:@"EmptyCall"]; - kUnaryCallMethod = [[GRPCMethodName alloc] initWithPackage:kPackage - interface:kService - method:@"UnaryCall"]; + kInexistentMethod = [[ProtoMethod alloc] initWithPackage:kPackage + service:kService + method:@"Inexistent"]; + kEmptyCallMethod = [[ProtoMethod alloc] initWithPackage:kPackage + service:kService + method:@"EmptyCall"]; + kUnaryCallMethod = [[ProtoMethod alloc] initWithPackage:kPackage + service:kService + method:@"UnaryCall"]; } - (void)testConnectionToRemoteServer { __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Server reachable."]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress - method:kInexistentMethod + path:kInexistentMethod.HTTPPath requestsWriter:[GRXWriter writerWithValue:[NSData data]]]; id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { @@ -95,7 +95,7 @@ static GRPCMethodName *kUnaryCallMethod; __weak XCTestExpectation *completion = [self expectationWithDescription:@"Empty RPC completed."]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress - method:kEmptyCallMethod + path:kEmptyCallMethod.HTTPPath requestsWriter:[GRXWriter writerWithValue:[NSData data]]]; id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { @@ -123,7 +123,7 @@ static GRPCMethodName *kUnaryCallMethod; id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[request data]]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress - method:kUnaryCallMethod + path:kUnaryCallMethod.HTTPPath requestsWriter:requestsWriter]; id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { @@ -153,7 +153,7 @@ static GRPCMethodName *kUnaryCallMethod; id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[request data]]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kHostAddress - method:kUnaryCallMethod + path:kUnaryCallMethod.HTTPPath requestsWriter:requestsWriter]; call.requestMetadata[@"Authorization"] = @"Bearer bogusToken"; diff --git a/src/objective-c/tests/LocalClearTextTests.m b/src/objective-c/tests/LocalClearTextTests.m index 05cc10410a..10c9f13ea3 100644 --- a/src/objective-c/tests/LocalClearTextTests.m +++ b/src/objective-c/tests/LocalClearTextTests.m @@ -35,7 +35,7 @@ #import <XCTest/XCTest.h> #import <GRPCClient/GRPCCall.h> -#import <GRPCClient/GRPCMethodName.h> +#import <ProtoRPC/ProtoMethod.h> #import <RouteGuide/RouteGuide.pbobjc.h> #import <RouteGuide/RouteGuide.pbrpc.h> #import <RxLibrary/GRXWriteable.h> @@ -87,14 +87,14 @@ static NSString * const kService = @"RouteGuide"; __weak XCTestExpectation *response = [self expectationWithDescription:@"Empty response received."]; __weak XCTestExpectation *completion = [self expectationWithDescription:@"Empty RPC completed."]; - GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:kPackage - interface:kService - method:@"RecordRoute"]; + ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:kPackage + service:kService + method:@"RecordRoute"]; id<GRXWriter> requestsWriter = [GRXWriter emptyWriter]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kRouteGuideHost - method:method + path:method.HTTPPath requestsWriter:requestsWriter]; id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { @@ -115,9 +115,9 @@ static NSString * const kService = @"RouteGuide"; __weak XCTestExpectation *response = [self expectationWithDescription:@"Response received."]; __weak XCTestExpectation *completion = [self expectationWithDescription:@"RPC completed."]; - GRPCMethodName *method = [[GRPCMethodName alloc] initWithPackage:kPackage - interface:kService - method:@"GetFeature"]; + ProtoMethod *method = [[ProtoMethod alloc] initWithPackage:kPackage + service:kService + method:@"GetFeature"]; RGDPoint *point = [RGDPoint message]; point.latitude = 28E7; @@ -125,7 +125,7 @@ static NSString * const kService = @"RouteGuide"; id<GRXWriter> requestsWriter = [GRXWriter writerWithValue:[point data]]; GRPCCall *call = [[GRPCCall alloc] initWithHost:kRouteGuideHost - method:method + path:method.HTTPPath requestsWriter:requestsWriter]; id<GRXWriteable> responsesWriteable = [[GRXWriteable alloc] initWithValueHandler:^(NSData *value) { |