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/*
*
* 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 "GRPCWrappedCall.h"
#import <Foundation/Foundation.h>
#include <grpc/grpc.h>
#include <grpc/byte_buffer.h>
#include <grpc/support/alloc.h>
#import "GRPCCompletionQueue.h"
#import "NSDictionary+GRPC.h"
#import "NSData+GRPC.h"
#import "NSError+GRPC.h"
@implementation GRPCOperation {
@protected
// Most operation subclasses don't set any flags in the grpc_op, and rely on the flag member being
// initialized to zero.
grpc_op _op;
void(^_handler)();
}
- (void)finish {
if (_handler) {
_handler();
}
}
@end
@implementation GRPCOpSendMetadata
- (instancetype)init {
return [self initWithMetadata:nil handler:nil];
}
- (instancetype)initWithMetadata:(NSDictionary *)metadata handler:(void (^)())handler {
if (self = [super init]) {
_op.op = GRPC_OP_SEND_INITIAL_METADATA;
_op.data.send_initial_metadata.count = metadata.count;
_op.data.send_initial_metadata.metadata = metadata.grpc_metadataArray;
_handler = handler;
}
return self;
}
- (void)dealloc {
gpr_free(_op.data.send_initial_metadata.metadata);
}
@end
@implementation GRPCOpSendMessage
- (instancetype)init {
return [self initWithMessage:nil handler:nil];
}
- (instancetype)initWithMessage:(NSData *)message handler:(void (^)())handler {
if (!message) {
[NSException raise:NSInvalidArgumentException format:@"message cannot be nil"];
}
if (self = [super init]) {
_op.op = GRPC_OP_SEND_MESSAGE;
_op.data.send_message = message.grpc_byteBuffer;
_handler = handler;
}
return self;
}
- (void)dealloc {
gpr_free(_op.data.send_message);
}
@end
@implementation GRPCOpSendClose
- (instancetype)init {
return [self initWithHandler:nil];
}
- (instancetype)initWithHandler:(void (^)())handler {
if (self = [super init]) {
_op.op = GRPC_OP_SEND_CLOSE_FROM_CLIENT;
_handler = handler;
}
return self;
}
@end
@implementation GRPCOpRecvMetadata {
grpc_metadata_array _headers;
}
- (instancetype) init {
return [self initWithHandler:nil];
}
- (instancetype) initWithHandler:(void (^)(NSDictionary *))handler {
if (self = [super init]) {
_op.op = GRPC_OP_RECV_INITIAL_METADATA;
grpc_metadata_array_init(&_headers);
_op.data.recv_initial_metadata = &_headers;
if (handler) {
// Prevent reference cycle with _handler
__weak typeof(self) weakSelf = self;
_handler = ^{
__strong typeof(self) strongSelf = weakSelf;
NSDictionary *metadata = [NSDictionary
grpc_dictionaryFromMetadataArray:strongSelf->_headers];
handler(metadata);
};
}
}
return self;
}
- (void)dealloc {
grpc_metadata_array_destroy(&_headers);
}
@end
@implementation GRPCOpRecvMessage{
grpc_byte_buffer *_receivedMessage;
}
- (instancetype)init {
return [self initWithHandler:nil];
}
- (instancetype)initWithHandler:(void (^)(grpc_byte_buffer *))handler {
if (self = [super init]) {
_op.op = GRPC_OP_RECV_MESSAGE;
_op.data.recv_message = &_receivedMessage;
if (handler) {
// Prevent reference cycle with _handler
__weak typeof(self) weakSelf = self;
_handler = ^{
__strong typeof(self) strongSelf = weakSelf;
handler(strongSelf->_receivedMessage);
};
}
}
return self;
}
@end
@implementation GRPCOpRecvStatus{
grpc_status_code _statusCode;
char *_details;
size_t _detailsCapacity;
grpc_metadata_array _trailers;
}
- (instancetype) init {
return [self initWithHandler:nil];
}
- (instancetype) initWithHandler:(void (^)(NSError *, NSDictionary *))handler {
if (self = [super init]) {
_op.op = GRPC_OP_RECV_STATUS_ON_CLIENT;
_op.data.recv_status_on_client.status = &_statusCode;
_op.data.recv_status_on_client.status_details = &_details;
_op.data.recv_status_on_client.status_details_capacity = &_detailsCapacity;
grpc_metadata_array_init(&_trailers);
_op.data.recv_status_on_client.trailing_metadata = &_trailers;
if (handler) {
// Prevent reference cycle with _handler
__weak typeof(self) weakSelf = self;
_handler = ^{
__strong typeof(self) strongSelf = weakSelf;
NSError *error = [NSError grpc_errorFromStatusCode:strongSelf->_statusCode
details:strongSelf->_details];
NSDictionary *trailers = [NSDictionary
grpc_dictionaryFromMetadataArray:strongSelf->_trailers];
handler(error, trailers);
};
}
}
return self;
}
- (void)dealloc {
grpc_metadata_array_destroy(&_trailers);
gpr_free(_details);
}
@end
@implementation GRPCWrappedCall{
grpc_call *_call;
GRPCCompletionQueue *_queue;
}
- (instancetype)init {
return [self initWithChannel:nil path:nil host:nil];
}
- (instancetype)initWithChannel:(GRPCChannel *)channel
path:(NSString *)path
host:(NSString *)host {
if (!channel || !path || !host) {
[NSException raise:NSInvalidArgumentException
format:@"channel, method, and host cannot be nil."];
}
if (self = [super init]) {
static dispatch_once_t initialization;
dispatch_once(&initialization, ^{
grpc_init();
});
_queue = [GRPCCompletionQueue completionQueue];
if (!_queue) {
return nil;
}
_call = grpc_channel_create_call(channel.unmanagedChannel, _queue.unmanagedQueue,
path.UTF8String, host.UTF8String, gpr_inf_future);
if (_call == NULL) {
return nil;
}
}
return self;
}
- (void)startBatchWithOperations:(NSArray *)operations {
[self startBatchWithOperations:operations errorHandler:nil];
}
- (void)startBatchWithOperations:(NSArray *)operations errorHandler:(void (^)())errorHandler {
size_t nops = operations.count;
grpc_op *ops_array = gpr_malloc(nops * sizeof(grpc_op));
size_t i = 0;
for (GRPCOperation *operation in operations) {
ops_array[i++] = operation.op;
}
grpc_call_error error = grpc_call_start_batch(_call, ops_array, nops,
(__bridge_retained void *)(^(bool success){
if (!success) {
if (errorHandler) {
errorHandler();
} else {
return;
}
}
for (GRPCOperation *operation in operations) {
[operation finish];
}
}));
gpr_free(ops_array);
if (error != GRPC_CALL_OK) {
[NSException raise:NSInternalInconsistencyException
format:@"A precondition for calling grpc_call_start_batch wasn't met. Error %i",
error];
}
}
- (void)cancel {
grpc_call_cancel(_call);
}
- (void)dealloc {
grpc_call_destroy(_call);
}
@end
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