72 lines
2.6 KiB
Java
72 lines
2.6 KiB
Java
/*
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* Copyright 2009 Red Hat, Inc.
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*
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* Red Hat licenses this file to you under the Apache License, version 2.0
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* (the "License"); you may not use this file except in compliance with the
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* 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.channel;
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/**
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* The {@link ReceiveBufferSizePredictorFactory} that creates a new
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* {@link AdaptiveReceiveBufferSizePredictor}.
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*
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* @author <a href="http://netty.io/">The Netty Project</a>
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* @author <a href="http://gleamynode.net/">Trustin Lee</a>
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*/
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public class AdaptiveReceiveBufferSizePredictorFactory implements
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ReceiveBufferSizePredictorFactory {
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private final int minimum;
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private final int initial;
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private final int maximum;
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/**
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* Creates a new factory with the default parameters. With the default
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* parameters, the expected buffer size starts from {@code 1024}, does not
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* go down below {@code 64}, and does not go up above {@code 65536}.
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*/
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public AdaptiveReceiveBufferSizePredictorFactory() {
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this(AdaptiveReceiveBufferSizePredictor.DEFAULT_MINIMUM,
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AdaptiveReceiveBufferSizePredictor.DEFAULT_INITIAL,
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AdaptiveReceiveBufferSizePredictor.DEFAULT_MAXIMUM);
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}
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/**
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* Creates a new factory with the specified parameters.
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*
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* @param minimum the inclusive lower bound of the expected buffer size
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* @param initial the initial buffer size when no feed back was received
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* @param maximum the inclusive upper bound of the expected buffer size
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*/
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public AdaptiveReceiveBufferSizePredictorFactory(int minimum, int initial, int maximum) {
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if (minimum <= 0) {
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throw new IllegalArgumentException("minimum: " + minimum);
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}
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if (initial < minimum) {
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throw new IllegalArgumentException("initial: " + initial);
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}
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if (maximum < initial) {
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throw new IllegalArgumentException("maximum: " + maximum);
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}
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this.minimum = minimum;
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this.initial = initial;
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this.maximum = maximum;
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}
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@Override
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public ReceiveBufferSizePredictor getPredictor() throws Exception {
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return new AdaptiveReceiveBufferSizePredictor(minimum, initial, maximum);
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}
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}
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