48a7a21541
Introduce a new interface called MessageSizeEstimator. This can be specific per Channel (via ChannelConfig). The MessageSizeEstimator will be used to estimate for a message that should be written. The default implementation handles ByteBuf, ByteBufHolder and FileRegion. A user is free to plug-in his/her own implementation for different behaviour.
40 lines
1.2 KiB
Java
40 lines
1.2 KiB
Java
/*
|
|
* Copyright 2013 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.channel;
|
|
|
|
/**
|
|
* Responsible to estimate size of a message. The size represent how much memory the message will ca. reserve in
|
|
* memory.
|
|
*/
|
|
public interface MessageSizeEstimator {
|
|
|
|
/**
|
|
* Creates a new handle. The handle provides the actual operations.
|
|
*/
|
|
Handle newHandle();
|
|
|
|
interface Handle {
|
|
|
|
/**
|
|
* Calculate the size of the given message.
|
|
*
|
|
* @param msg The message for which the size should be calculated
|
|
* @return size The size in bytes. The returned size must be >= 0
|
|
*/
|
|
int size(Object msg);
|
|
}
|
|
}
|