3a9f472161
Related: #4333 #4421 #5128 Motivation: slice(), duplicate() and readSlice() currently create a non-recyclable derived buffer instance. Under heavy load, an application that creates a lot of derived buffers can put the garbage collector under pressure. Modifications: - Add the following methods which creates a non-recyclable derived buffer - retainedSlice() - retainedDuplicate() - readRetainedSlice() - Add the new recyclable derived buffer implementations, which has its own reference count value - Add ByteBufHolder.retainedDuplicate() - Add ByteBufHolder.replace(ByteBuf) so that.. - a user can replace the content of the holder in a consistent way - copy/duplicate/retainedDuplicate() can delegate the holder construction to replace(ByteBuf) - Use retainedDuplicate() and retainedSlice() wherever possible - Miscellaneous: - Rename DuplicateByteBufTest to DuplicatedByteBufTest (missing 'D') - Make ReplayingDecoderByteBuf.reject() return an exception instead of throwing it so that its callers don't need to add dummy return statement Result: Derived buffers are now recycled when created via retainedSlice() and retainedDuplicate() and derived from a pooled buffer
110 lines
2.8 KiB
Java
110 lines
2.8 KiB
Java
/*
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* Copyright 2012 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.http.websocketx;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.DefaultByteBufHolder;
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import io.netty.util.internal.StringUtil;
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/**
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* Base class for web socket frames
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*/
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public abstract class WebSocketFrame extends DefaultByteBufHolder {
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/**
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* Flag to indicate if this frame is the final fragment in a message. The first fragment (frame) may also be the
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* final fragment.
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*/
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private final boolean finalFragment;
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/**
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* RSV1, RSV2, RSV3 used for extensions
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*/
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private final int rsv;
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protected WebSocketFrame(ByteBuf binaryData) {
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this(true, 0, binaryData);
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}
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protected WebSocketFrame(boolean finalFragment, int rsv, ByteBuf binaryData) {
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super(binaryData);
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this.finalFragment = finalFragment;
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this.rsv = rsv;
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}
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/**
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* Flag to indicate if this frame is the final fragment in a message. The first fragment (frame) may also be the
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* final fragment.
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*/
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public boolean isFinalFragment() {
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return finalFragment;
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}
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/**
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* Bits used for extensions to the standard.
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*/
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public int rsv() {
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return rsv;
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}
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@Override
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public WebSocketFrame copy() {
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return (WebSocketFrame) super.copy();
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}
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@Override
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public WebSocketFrame duplicate() {
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return (WebSocketFrame) super.duplicate();
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}
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@Override
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public WebSocketFrame retainedDuplicate() {
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return (WebSocketFrame) super.retainedDuplicate();
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}
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@Override
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public abstract WebSocketFrame replace(ByteBuf content);
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@Override
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public String toString() {
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return StringUtil.simpleClassName(this) + "(data: " + contentToString() + ')';
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}
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@Override
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public WebSocketFrame retain() {
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super.retain();
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return this;
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}
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@Override
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public WebSocketFrame retain(int increment) {
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super.retain(increment);
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return this;
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}
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@Override
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public WebSocketFrame touch() {
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super.touch();
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return this;
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}
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@Override
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public WebSocketFrame touch(Object hint) {
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super.touch(hint);
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return this;
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}
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}
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