io.netty.channel.FixedRecvByteBufAllocator Maven / Gradle / Ivy
/*
* Copyright 2012 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;
/**
* The {@link RecvByteBufAllocator} that always yields the same buffer
* size prediction. This predictor ignores the feed back from the I/O thread.
*/
public class FixedRecvByteBufAllocator extends DefaultMaxMessagesRecvByteBufAllocator {
private final int bufferSize;
private final class HandleImpl extends MaxMessageHandle {
private final int bufferSize;
public HandleImpl(int bufferSize) {
this.bufferSize = bufferSize;
}
@Override
public int guess() {
return bufferSize;
}
}
/**
* Creates a new predictor that always returns the same prediction of
* the specified buffer size.
*/
public FixedRecvByteBufAllocator(int bufferSize) {
if (bufferSize <= 0) {
throw new IllegalArgumentException(
"bufferSize must greater than 0: " + bufferSize);
}
this.bufferSize = bufferSize;
}
@SuppressWarnings("deprecation")
@Override
public Handle newHandle() {
return new HandleImpl(bufferSize);
}
@Override
public FixedRecvByteBufAllocator respectMaybeMoreData(boolean respectMaybeMoreData) {
super.respectMaybeMoreData(respectMaybeMoreData);
return this;
}
}