1 /*
2 * Copyright 2009 Red Hat, Inc.
3 *
4 * Red Hat licenses this file to you under the Apache License, version 2.0
5 * (the "License"); you may not use this file except in compliance with the
6 * 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 package org.jboss.netty.channel.socket.nio;
17
18 import java.io.IOException;
19 import java.nio.channels.CancelledKeyException;
20 import java.nio.channels.Selector;
21
22 import org.jboss.netty.logging.InternalLogger;
23 import org.jboss.netty.logging.InternalLoggerFactory;
24
25 /**
26 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
27 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
28 * @version $Rev: 2200 $, $Date: 2010-02-23 14:42:39 +0900 (Tue, 23 Feb 2010) $
29 */
30 final class SelectorUtil {
31 private static final InternalLogger logger =
32 InternalLoggerFactory.getInstance(SelectorUtil.class);
33
34 static final int DEFAULT_IO_THREADS = Runtime.getRuntime().availableProcessors() * 2;
35
36 static void select(Selector selector) throws IOException {
37 try {
38 selector.select(500);
39 } catch (CancelledKeyException e) {
40 // Harmless exception - log anyway
41 logger.debug(
42 CancelledKeyException.class.getSimpleName() +
43 " raised by a Selector - JDK bug?", e);
44 }
45 }
46 }