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
118 lines
2.8 KiB
Java
118 lines
2.8 KiB
Java
/*
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* Copyright 2016 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License, version 2.0 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain a
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* 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 distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package io.netty.handler.codec.redis;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import io.netty.util.internal.UnstableApi;
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/**
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* A last chunk of Bulk Strings.
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*/
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@UnstableApi
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public interface LastBulkStringRedisContent extends BulkStringRedisContent {
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/**
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* The 'end of content' marker in chunked encoding.
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*/
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LastBulkStringRedisContent EMPTY_LAST_CONTENT = new LastBulkStringRedisContent() {
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@Override
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public ByteBuf content() {
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return Unpooled.EMPTY_BUFFER;
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}
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@Override
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public LastBulkStringRedisContent copy() {
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return this;
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}
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@Override
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public LastBulkStringRedisContent duplicate() {
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return this;
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}
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@Override
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public LastBulkStringRedisContent retainedDuplicate() {
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return this;
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}
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@Override
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public LastBulkStringRedisContent replace(ByteBuf content) {
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return new DefaultLastBulkStringRedisContent(content);
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}
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@Override
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public LastBulkStringRedisContent retain(int increment) {
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return this;
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}
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@Override
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public LastBulkStringRedisContent retain() {
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return this;
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}
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@Override
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public int refCnt() {
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return 1;
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}
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@Override
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public LastBulkStringRedisContent touch() {
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return this;
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}
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@Override
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public LastBulkStringRedisContent touch(Object hint) {
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return this;
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}
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@Override
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public boolean release() {
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return false;
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}
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@Override
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public boolean release(int decrement) {
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return false;
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}
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};
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@Override
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LastBulkStringRedisContent copy();
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@Override
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LastBulkStringRedisContent duplicate();
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@Override
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LastBulkStringRedisContent retainedDuplicate();
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@Override
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LastBulkStringRedisContent replace(ByteBuf content);
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@Override
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LastBulkStringRedisContent retain();
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@Override
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LastBulkStringRedisContent retain(int increment);
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@Override
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LastBulkStringRedisContent touch();
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@Override
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LastBulkStringRedisContent touch(Object hint);
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}
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