74f24a5c19
Motivation: Our http2 child channel implementation was not 100 % complete and had a few bugs. Beside this the performance overhead was non-trivial. Modifications: There are a lot of modifications, the most important.... * Http2FrameCodec extends Http2ConnectionHandler and Http2MultiplexCodec extends Http2FrameCodec to reduce performance heads and inter-dependencies on handlers in the pipeline * Correctly handle outbound flow control for child channels * Support unknow frame types in Http2FrameCodec and Http2MultiplexCodec * Use a consistent way how to create Http2ConnectionHandler, Http2FrameCodec and Http2MultiplexCodec (via a builder) * Remove Http2Codec and Http2CodecBuilder as the user should just use Http2MultipleCodec and Http2MultiplexCodecBuilder now * Smart handling of flushes from child channels to reduce overhead * Reduce object allocations * child channels always use the same EventLoop as the parent Channel to reduce overhead and simplify implementation. * Not extend AbstractChannel for the child channel implementation to reduce overhead in terms of performance and memory usage * Remove Http2FrameStream.managedState(...) as the user of the child channel api should just use Channel.attr(...) Result: Http2MultiplexCodec (and so child channels) and Http2FrameCodec are more correct, faster and more feature complete.
52 lines
1.4 KiB
Java
52 lines
1.4 KiB
Java
/*
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* Copyright 2017 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.http2;
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import io.netty.util.internal.UnstableApi;
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@UnstableApi
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public final class Http2FrameStreamEvent {
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private final Http2FrameStream stream;
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private final Type type;
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enum Type {
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State,
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Writability
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}
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private Http2FrameStreamEvent(Http2FrameStream stream, Type type) {
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this.stream = stream;
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this.type = type;
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}
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public Http2FrameStream stream() {
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return stream;
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}
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public Type type() {
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return type;
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}
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static Http2FrameStreamEvent stateChanged(Http2FrameStream stream) {
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return new Http2FrameStreamEvent(stream, Type.State);
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}
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static Http2FrameStreamEvent writabilityChanged(Http2FrameStream stream) {
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return new Http2FrameStreamEvent(stream, Type.Writability);
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}
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}
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