// This source code is dual-licensed under the Mozilla Public License ("MPL"),
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// version 1.1 and the Apache License ("ASL"), version 2.0.
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//
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// The ASL v2.0:
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//
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// ---------------------------------------------------------------------------
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// Copyright 2016 Pivotal Software, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ---------------------------------------------------------------------------
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//
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// The MPL v1.1:
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//
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// ---------------------------------------------------------------------------
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// The contents of this file are subject to the Mozilla Public License
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// Version 1.1 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License at
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// https://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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// License for the specific language governing rights and limitations
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// under the License.
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//
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// The Original Code is RabbitMQ
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//
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// The Initial Developer of the Original Code is Pivotal Software, Inc.
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// All Rights Reserved.
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//
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// Alternatively, the contents of this file may be used under the terms
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// of the Apache Standard license (the "ASL License"), in which case the
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// provisions of the ASL License are applicable instead of those
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// above. If you wish to allow use of your version of this file only
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// under the terms of the ASL License and not to allow others to use
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// your version of this file under the MPL, indicate your decision by
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// deleting the provisions above and replace them with the notice and
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// other provisions required by the ASL License. If you do not delete
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// the provisions above, a recipient may use your version of this file
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// under either the MPL or the ASL License.
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// ---------------------------------------------------------------------------
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#import "RMQConnectionRecover.h"
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@interface RMQConnectionRecover ()
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@property (nonatomic, readwrite) NSNumber *interval;
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@property (nonatomic, readwrite) NSUInteger attempts;
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@property (nonatomic, readwrite) NSUInteger attemptLimit;
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@property (nonatomic, readwrite) BOOL onlyErrors;
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@property (nonatomic, readwrite) id<RMQHeartbeatSender> heartbeatSender;
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@property (nonatomic, readwrite) id<RMQLocalSerialQueue> commandQueue;
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@property (nonatomic, readwrite) id<RMQConnectionDelegate> delegate;
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@end
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@implementation RMQConnectionRecover
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- (instancetype)initWithInterval:(NSNumber *)interval
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attemptLimit:(NSNumber *)attemptLimit
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onlyErrors:(BOOL)onlyErrors
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heartbeatSender:(id<RMQHeartbeatSender>)heartbeatSender
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commandQueue:(id<RMQLocalSerialQueue>)commandQueue
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delegate:(id<RMQConnectionDelegate>)delegate {
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self = [super init];
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if (self) {
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self.interval = interval;
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self.attempts = 0;
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self.onlyErrors = onlyErrors;
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self.attemptLimit = attemptLimit.integerValue;
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self.heartbeatSender = heartbeatSender;
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self.commandQueue = commandQueue;
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self.delegate = delegate;
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}
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return self;
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}
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- (void)recover:(id<RMQStarter>)connection
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channelAllocator:(id<RMQChannelAllocator>)allocator
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error:(NSError *)error {
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[self.commandQueue enqueue:^{
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[self.heartbeatSender stop];
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}];
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if ((self.onlyErrors && !error) || [self currentAttemptBeyondLimit]) {
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return;
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}
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[self.commandQueue enqueue:^{
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[self.delegate willStartRecoveryWithConnection:(RMQConnection *)connection];
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}];
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[self.commandQueue delayedBy:self.interval enqueue:^{
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[self.delegate startingRecoveryWithConnection:(RMQConnection *)connection];
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[connection start:^{
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[self.commandQueue enqueue:^{
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for (id<RMQChannel> ch in allocator.allocatedUserChannels) {
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[ch recover];
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}
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self.attempts = 0;
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[self.delegate recoveredConnection:(RMQConnection *)connection];
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}];
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}];
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}];
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}
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# pragma mark - Private
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- (BOOL)currentAttemptBeyondLimit {
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return self.interval.integerValue == 0 || ++self.attempts > self.attemptLimit;
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}
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@end
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