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1   /*
2    * Copyright 2020 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 io.netty.util.internal.ThrowableUtil;
19  
20  import java.nio.channels.ClosedChannelException;
21  
22  /**
23   * Cheap {@link ClosedChannelException} that does not fill in the stacktrace.
24   */
25  final class StacklessClosedChannelException extends ClosedChannelException {
26  
27      private static final long serialVersionUID = -2214806025529435136L;
28  
29      private StacklessClosedChannelException() { }
30  
31      @Override
32      public Throwable fillInStackTrace() {
33          // Suppress a warning since this method doesn't need synchronization
34          return this; // lgtm [java/non-sync-override]
35      }
36  
37      /**
38       * Creates a new {@link StacklessClosedChannelException} which has the origin of the given {@link Class} and method.
39       */
40      static StacklessClosedChannelException newInstance(Class<?> clazz, String method) {
41          return ThrowableUtil.unknownStackTrace(new StacklessClosedChannelException(), clazz, method);
42      }
43  }