| 1 | /** |
| 2 | * Licensed to jclouds, Inc. (jclouds) under one or more |
| 3 | * contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. jclouds licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.jclouds.predicates; |
| 20 | |
| 21 | import java.io.IOException; |
| 22 | import java.net.InetSocketAddress; |
| 23 | import java.net.Socket; |
| 24 | |
| 25 | import javax.annotation.Resource; |
| 26 | import javax.inject.Named; |
| 27 | import javax.inject.Singleton; |
| 28 | |
| 29 | import org.jclouds.logging.Logger; |
| 30 | import org.jclouds.net.IPSocket; |
| 31 | |
| 32 | import com.google.inject.Inject; |
| 33 | |
| 34 | /** |
| 35 | * |
| 36 | * Tests to see if a socket is open. |
| 37 | * |
| 38 | * @author Adrian Cole |
| 39 | */ |
| 40 | @Singleton |
| 41 | public class InetSocketAddressConnect implements SocketOpen { |
| 42 | |
| 43 | @Resource |
| 44 | protected Logger logger = Logger.NULL; |
| 45 | |
| 46 | @Inject(optional = true) |
| 47 | @Named("org.jclouds.socket_timeout") |
| 48 | private int timeout = 2000; |
| 49 | |
| 50 | @Override |
| 51 | public boolean apply(IPSocket socketA) { |
| 52 | InetSocketAddress socketAddress = new InetSocketAddress(socketA.getAddress(), socketA |
| 53 | .getPort()); |
| 54 | Socket socket = null; |
| 55 | try { |
| 56 | logger.trace("testing socket %s", socketAddress); |
| 57 | socket = new Socket(); |
| 58 | socket.setReuseAddress(false); |
| 59 | socket.setSoLinger(false, 1); |
| 60 | socket.setSoTimeout(timeout); |
| 61 | socket.connect(socketAddress, timeout); |
| 62 | } catch (IOException e) { |
| 63 | return false; |
| 64 | } finally { |
| 65 | if (socket != null) { |
| 66 | try { |
| 67 | socket.close(); |
| 68 | } catch (IOException ioe) { |
| 69 | // no work to do |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | return true; |
| 74 | } |
| 75 | |
| 76 | } |