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
114 lines
2.9 KiB
Java
114 lines
2.9 KiB
Java
/*
|
|
* Copyright 2014 The Netty Project
|
|
*
|
|
* The Netty Project licenses this file to you under the Apache License,
|
|
* version 2.0 (the "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
|
|
package io.netty.handler.codec.mqtt;
|
|
|
|
import io.netty.buffer.ByteBuf;
|
|
import io.netty.buffer.ByteBufHolder;
|
|
import io.netty.util.IllegalReferenceCountException;
|
|
|
|
/**
|
|
* See <a href="http://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html#publish">MQTTV3.1/publish</a>
|
|
*/
|
|
public class MqttPublishMessage extends MqttMessage implements ByteBufHolder {
|
|
|
|
public MqttPublishMessage(
|
|
MqttFixedHeader mqttFixedHeader,
|
|
MqttPublishVariableHeader variableHeader,
|
|
ByteBuf payload) {
|
|
super(mqttFixedHeader, variableHeader, payload);
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishVariableHeader variableHeader() {
|
|
return (MqttPublishVariableHeader) super.variableHeader();
|
|
}
|
|
|
|
@Override
|
|
public ByteBuf payload() {
|
|
return content();
|
|
}
|
|
|
|
@Override
|
|
public ByteBuf content() {
|
|
final ByteBuf data = (ByteBuf) super.payload();
|
|
if (data.refCnt() <= 0) {
|
|
throw new IllegalReferenceCountException(data.refCnt());
|
|
}
|
|
return data;
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage copy() {
|
|
return replace(content().copy());
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage duplicate() {
|
|
return replace(content().duplicate());
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage retainedDuplicate() {
|
|
return replace(content().retainedDuplicate());
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage replace(ByteBuf content) {
|
|
return new MqttPublishMessage(fixedHeader(), variableHeader(), content);
|
|
}
|
|
|
|
@Override
|
|
public int refCnt() {
|
|
return content().refCnt();
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage retain() {
|
|
content().retain();
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage retain(int increment) {
|
|
content().retain(increment);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage touch() {
|
|
content().touch();
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public MqttPublishMessage touch(Object hint) {
|
|
content().touch(hint);
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public boolean release() {
|
|
return content().release();
|
|
}
|
|
|
|
@Override
|
|
public boolean release(int decrement) {
|
|
return content().release(decrement);
|
|
}
|
|
|
|
}
|