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 * https://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 io.netty.channel;
17
18 import static io.netty.util.internal.ObjectUtil.checkPositive;
19
20 import java.net.SocketAddress;
21
22 /**
23 * Represents the properties of a {@link Channel} implementation.
24 */
25 public final class ChannelMetadata {
26
27 private final boolean hasDisconnect;
28 private final int defaultMaxMessagesPerRead;
29
30 /**
31 * Create a new instance
32 *
33 * @param hasDisconnect {@code true} if and only if the channel has the {@code disconnect()} operation
34 * that allows a user to disconnect and then call {@link Channel#connect(SocketAddress)}
35 * again, such as UDP/IP.
36 */
37 public ChannelMetadata(boolean hasDisconnect) {
38 this(hasDisconnect, 16);
39 }
40
41 /**
42 * Create a new instance
43 *
44 * @param hasDisconnect {@code true} if and only if the channel has the {@code disconnect()} operation
45 * that allows a user to disconnect and then call {@link Channel#connect(SocketAddress)}
46 * again, such as UDP/IP.
47 * @param defaultMaxMessagesPerRead If a {@link MaxMessagesRecvByteBufAllocator} is in use, then this value will be
48 * set for {@link MaxMessagesRecvByteBufAllocator#maxMessagesPerRead()}. Must be {@code > 0}.
49 */
50 public ChannelMetadata(boolean hasDisconnect, int defaultMaxMessagesPerRead) {
51 checkPositive(defaultMaxMessagesPerRead, "defaultMaxMessagesPerRead");
52 this.hasDisconnect = hasDisconnect;
53 this.defaultMaxMessagesPerRead = defaultMaxMessagesPerRead;
54 }
55
56 /**
57 * Returns {@code true} if and only if the channel has the {@code disconnect()} operation
58 * that allows a user to disconnect and then call {@link Channel#connect(SocketAddress)} again,
59 * such as UDP/IP.
60 */
61 public boolean hasDisconnect() {
62 return hasDisconnect;
63 }
64
65 /**
66 * If a {@link MaxMessagesRecvByteBufAllocator} is in use, then this is the default value for
67 * {@link MaxMessagesRecvByteBufAllocator#maxMessagesPerRead()}.
68 */
69 public int defaultMaxMessagesPerRead() {
70 return defaultMaxMessagesPerRead;
71 }
72 }