1 files changed, 79 insertions, 0 deletions
diff --git a/src/objective-c/GRPCClient/private/GRPCCronetChannelFactory.m b/src/objective-c/GRPCClient/private/GRPCCronetChannelFactory.m
new file mode 100644
index 0000000000..5bcb021dc4
--- /dev/null
+++ b/src/objective-c/GRPCClient/private/GRPCCronetChannelFactory.m
@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#import "GRPCCronetChannelFactory.h"
+
+#import "ChannelArgsUtil.h"
+#import "GRPCChannel.h"
+
+#ifdef GRPC_COMPILE_WITH_CRONET
+
+#import <Cronet/Cronet.h>
+#include <grpc/grpc_cronet.h>
+
+@implementation GRPCCronetChannelFactory {
+  stream_engine *_cronetEngine;
+}
+
++ (instancetype)sharedInstance {
+  static GRPCCronetChannelFactory *instance;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    instance = [[self alloc] initWithEngine:[Cronet getGlobalEngine]];
+  });
+  return instance;
+}
+
+- (instancetype)initWithEngine:(stream_engine *)engine {
+  NSAssert(engine != NULL, @"Cronet engine cannot be empty.");
+  if (!engine) {
+    return nil;
+  }
+  if ((self = [super init])) {
+    _cronetEngine = engine;
+  }
+  return self;
+}
+
+- (grpc_channel *)createChannelWithHost:(NSString *)host channelArgs:(NSDictionary *)args {
+  grpc_channel_args *channelArgs = GRPCBuildChannelArgs(args);
+  grpc_channel *unmanagedChannel =
+      grpc_cronet_secure_channel_create(_cronetEngine, host.UTF8String, channelArgs, NULL);
+  GRPCFreeChannelArgs(channelArgs);
+  return unmanagedChannel;
+}
+
+@end
+
+#else
+
+@implementation GRPCCronetChannelFactory
+
++ (instancetype)sharedInstance {
+  NSAssert(NO, @"Must enable macro GRPC_COMPILE_WITH_CRONET to build Cronet channel.");
+  return nil;
+}
+
+- (grpc_channel *)createChannelWithHost:(NSString *)host channelArgs:(NSDictionary *)args {
+  NSAssert(NO, @"Must enable macro GRPC_COMPILE_WITH_CRONET to build Cronet channel.");
+  return NULL;
+}
+
+@end
+
+#endif