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1   /*
2    * Copyright 2014 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  
17  package io.netty.resolver;
18  
19  import io.netty.util.concurrent.EventExecutor;
20  import io.netty.util.concurrent.Promise;
21  
22  import java.net.SocketAddress;
23  
24  /**
25   * A {@link NameResolver} that does not perform any resolution but always reports successful resolution.
26   * This resolver is useful when name resolution is performed by a handler in a pipeline, such as a proxy handler.
27   */
28  public class NoopNameResolver extends SimpleNameResolver<SocketAddress> {
29  
30      public NoopNameResolver(EventExecutor executor) {
31          super(executor);
32      }
33  
34      @Override
35      protected boolean doIsResolved(SocketAddress address) {
36          return true;
37      }
38  
39      @Override
40      protected void doResolve(SocketAddress unresolvedAddress, Promise<SocketAddress> promise) throws Exception {
41          promise.setSuccess(unresolvedAddress);
42      }
43  }