// 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 "RMQReader.h"
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#import "RMQFrame.h"
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#import "RMQMethodDecoder.h"
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@interface RMQReader ()
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@property (nonatomic, readwrite) id<RMQTransport>transport;
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@property (nonatomic, readwrite) id<RMQFrameHandler>frameHandler;
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@end
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@implementation RMQReader
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- (instancetype)initWithTransport:(id<RMQTransport>)transport frameHandler:(id<RMQFrameHandler>)frameHandler {
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self = [super init];
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if (self) {
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self.transport = transport;
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self.frameHandler = frameHandler;
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}
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return self;
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}
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- (void)run {
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[self.transport readFrame:^(NSData * _Nonnull methodData) {
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// executing on a concurrent queue
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RMQFrame *frame = [self frameWithData:methodData];
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if (frame.isHeartbeat) {
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[self run];
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} else {
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[self handleMethodFrame:frame];
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}
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}];
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}
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# pragma mark - Private
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- (void)handleMethodFrame:(RMQFrame *)frame {
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id<RMQMethod> method = (id<RMQMethod>)frame.payload;
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if (method.hasContent) {
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[self.transport readFrame:^(NSData * _Nonnull headerData) {
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RMQFrame *headerFrame = [self frameWithData:headerData];
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RMQContentHeader *header = (RMQContentHeader *)headerFrame.payload;
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RMQFrameset *frameset = [[RMQFrameset alloc] initWithChannelNumber:frame.channelNumber
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method:method
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contentHeader:header
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contentBodies:@[]];
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if ([header.bodySize isEqualToNumber:@0]) {
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[self.frameHandler handleFrameset:frameset];
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} else {
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[self readBodiesForIncompleteFrameset:frameset];
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}
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}];
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} else {
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RMQFrameset *frameset = [[RMQFrameset alloc] initWithChannelNumber:frame.channelNumber
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method:method];
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[self.frameHandler handleFrameset:frameset];
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}
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}
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- (void)readBodiesForIncompleteFrameset:(RMQFrameset *)contentFrameset {
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[self.transport readFrame:^(NSData * _Nonnull data) {
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RMQFrame *frame = [self frameWithData:data];
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if ([frame.payload isKindOfClass:[RMQContentBody class]]) {
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[self frameset:contentFrameset
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addBodyFrame:frame];
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} else {
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[self.frameHandler handleFrameset:contentFrameset];
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RMQFrameset *nonContentFrameset = [[RMQFrameset alloc] initWithChannelNumber:contentFrameset.channelNumber
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method:(id <RMQMethod>)frame.payload];
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[self.frameHandler handleFrameset:nonContentFrameset];
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}
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}];
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}
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- (void)frameset:(RMQFrameset *)frameset
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addBodyFrame:(RMQFrame *)newFrame {
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RMQFrameset *combinedFrameset = [frameset addBody:(RMQContentBody *)newFrame.payload];
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if (frameset.contentHeader.bodySize.integerValue == combinedFrameset.contentData.length) {
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[self.frameHandler handleFrameset:combinedFrameset];
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} else {
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[self readBodiesForIncompleteFrameset:combinedFrameset];
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}
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}
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- (RMQFrame *)frameWithData:(NSData *)data {
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RMQParser *parser = [[RMQParser alloc] initWithData:data];
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return [[RMQFrame alloc] initWithParser:parser];
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}
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@end
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