1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.tomcat.util.net;
18
19 import java.util.Objects;
20
21 public abstract class SocketProcessorBase<S> implements Runnable {
22
23 protected SocketWrapperBase<S> socketWrapper;
24 protected SocketEvent event;
25
26 public SocketProcessorBase(SocketWrapperBase<S> socketWrapper, SocketEvent event) {
27 reset(socketWrapper, event);
28 }
29
30
31 public void reset(SocketWrapperBase<S> socketWrapper, SocketEvent event) {
32 Objects.requireNonNull(event);
33 this.socketWrapper = socketWrapper;
34 this.event = event;
35 }
36
37
38 @Override
39 public final void run() {
40 synchronized (socketWrapper) {
41 // It is possible that processing may be triggered for read and
42 // write at the same time. The sync above makes sure that processing
43 // does not occur in parallel. The test below ensures that if the
44 // first event to be processed results in the socket being closed,
45 // the subsequent events are not processed.
46 if (socketWrapper.isClosed()) {
47 return;
48 }
49 doRun();
50 }
51 }
52
53
54 protected abstract void doRun();
55 }
56