1 /*
2 * Copyright 2024 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.resolver.dns;
17
18 /**
19 * Strategy that influence how {@link io.netty.channel.Channel}s are used during queries.
20 */
21 public enum DnsNameResolverChannelStrategy {
22 /**
23 * Use the same underlying {@link io.netty.channel.Channel} for all queries produced by a single
24 {@link DnsNameResolver} instance.
25 */
26 ChannelPerResolver,
27 /**
28 * Use a new {@link io.netty.channel.Channel} per resolution or per explicit query. As of today this is similar
29 * to what the {@link io.netty.resolver.DefaultNameResolver} (JDK default) does. As we will need to open and close
30 * a new socket for each resolution it will come with a performance overhead. That said using this strategy should
31 * be the most robust and also guard against problems that can arise in kubernetes (or similar) setups.
32 */
33 ChannelPerResolution
34 }