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/*
*
* Copyright 2015 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 <Foundation/Foundation.h>
#import "../internal/GRPCCallOptions+Internal.h"
#import "GRPCChannel.h"
#import "GRPCChannelFactory.h"
#import "GRPCChannelPool.h"
#import "GRPCConnectivityMonitor.h"
#import "GRPCCronetChannelFactory.h"
#import "GRPCInsecureChannelFactory.h"
#import "GRPCSecureChannelFactory.h"
#import "version.h"
#import "utilities.h"
#import <GRPCClient/GRPCCall+Cronet.h>
#include <grpc/support/log.h>
extern const char *kCFStreamVarName;
static GRPCChannelPool *gChannelPool;
static dispatch_once_t gInitChannelPool;
@implementation GRPCChannelPool {
NSMutableDictionary<GRPCChannelConfiguration *, GRPCChannel *> *_channelPool;
}
+ (nullable instancetype)sharedInstance {
dispatch_once(&gInitChannelPool, ^{
gChannelPool = [[GRPCChannelPool alloc] init];
GRPCAssert(gChannelPool != nil, NSMallocException, @"Cannot initialize global channel pool.");
});
return gChannelPool;
}
- (instancetype)init {
if ((self = [super init])) {
_channelPool = [NSMutableDictionary dictionary];
// Connectivity monitor is not required for CFStream
char *enableCFStream = getenv(kCFStreamVarName);
if (enableCFStream == nil || enableCFStream[0] != '1') {
[GRPCConnectivityMonitor registerObserver:self selector:@selector(connectivityChange:)];
}
}
return self;
}
- (GRPCChannel *)channelWithHost:(NSString *)host
callOptions:(GRPCCallOptions *)callOptions {
return [self channelWithHost:host
callOptions:callOptions
destroyDelay:0];
}
- (GRPCChannel *)channelWithHost:(NSString *)host
callOptions:(GRPCCallOptions *)callOptions
destroyDelay:(NSTimeInterval)destroyDelay {
GRPCAssert(host.length > 0, NSInvalidArgumentException, @"Host must not be empty.");
GRPCAssert(callOptions != nil, NSInvalidArgumentException, @"callOptions must not be empty.");
GRPCChannel *channel;
GRPCChannelConfiguration *configuration =
[[GRPCChannelConfiguration alloc] initWithHost:host callOptions:callOptions];
@synchronized(self) {
channel = _channelPool[configuration];
if (channel == nil || channel.disconnected) {
if (destroyDelay == 0) {
channel = [[GRPCChannel alloc] initWithChannelConfiguration:configuration];
} else {
channel = [[GRPCChannel alloc] initWithChannelConfiguration:configuration destroyDelay:destroyDelay];
}
_channelPool[configuration] = channel;
}
}
return channel;
}
+ (void)closeOpenConnections {
[[GRPCChannelPool sharedInstance] destroyAllChannels];
}
- (void)destroyAllChannels {
@synchronized(self) {
for (id key in _channelPool) {
[_channelPool[key] disconnect];
}
_channelPool = [NSMutableDictionary dictionary];
}
}
- (void)connectivityChange:(NSNotification *)note {
[self destroyAllChannels];
}
- (void)dealloc {
[GRPCConnectivityMonitor unregisterObserver:self];
}
@end
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