1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.channel;
17
18
19 /**
20 * The {@link ReceiveBufferSizePredictor} that always yields the same buffer
21 * size prediction. This predictor ignores the feed back from the I/O thread.
22 */
23 public class FixedReceiveBufferSizePredictor implements
24 ReceiveBufferSizePredictor {
25
26 private final int bufferSize;
27
28 /**
29 * Creates a new predictor that always returns the same prediction of
30 * the specified buffer size.
31 */
32 public FixedReceiveBufferSizePredictor(int bufferSize) {
33 if (bufferSize <= 0) {
34 throw new IllegalArgumentException(
35 "bufferSize must greater than 0: " + bufferSize);
36 }
37 this.bufferSize = bufferSize;
38 }
39
40 public int nextReceiveBufferSize() {
41 return bufferSize;
42 }
43
44 public void previousReceiveBufferSize(int previousReceiveBufferSize) {
45 // Ignore
46 }
47 }