| %line | %branch | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| org.apache.commons.net.DatagramSocketClient |
|
|
| 1 | /* |
|
| 2 | * Copyright 2001-2005 The Apache Software Foundation |
|
| 3 | * |
|
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
|
| 5 | * you may not use this file except in compliance with the License. |
|
| 6 | * 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, |
|
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
| 13 | * See the License for the specific language governing permissions and |
|
| 14 | * limitations under the License. |
|
| 15 | */ |
|
| 16 | package org.apache.commons.net; |
|
| 17 | ||
| 18 | import java.net.DatagramSocket; |
|
| 19 | import java.net.InetAddress; |
|
| 20 | import java.net.SocketException; |
|
| 21 | ||
| 22 | /*** |
|
| 23 | * The DatagramSocketClient provides the basic operations that are required |
|
| 24 | * of client objects accessing datagram sockets. It is meant to be |
|
| 25 | * subclassed to avoid having to rewrite the same code over and over again |
|
| 26 | * to open a socket, close a socket, set timeouts, etc. Of special note |
|
| 27 | * is the {@link #setDatagramSocketFactory setDatagramSocketFactory } |
|
| 28 | * method, which allows you to control the type of DatagramSocket the |
|
| 29 | * DatagramSocketClient creates for network communications. This is |
|
| 30 | * especially useful for adding things like proxy support as well as better |
|
| 31 | * support for applets. For |
|
| 32 | * example, you could create a |
|
| 33 | * {@link org.apache.commons.net.DatagramSocketFactory} |
|
| 34 | * that |
|
| 35 | * requests browser security capabilities before creating a socket. |
|
| 36 | * All classes derived from DatagramSocketClient should use the |
|
| 37 | * {@link #_socketFactory_ _socketFactory_ } member variable to |
|
| 38 | * create DatagramSocket instances rather than instantiating |
|
| 39 | * them by directly invoking a constructor. By honoring this contract |
|
| 40 | * you guarantee that a user will always be able to provide his own |
|
| 41 | * Socket implementations by substituting his own SocketFactory. |
|
| 42 | * <p> |
|
| 43 | * <p> |
|
| 44 | * @author Daniel F. Savarese |
|
| 45 | * @see DatagramSocketFactory |
|
| 46 | ***/ |
|
| 47 | ||
| 48 | public abstract class DatagramSocketClient |
|
| 49 | { |
|
| 50 | /*** |
|
| 51 | * The default DatagramSocketFactory shared by all DatagramSocketClient |
|
| 52 | * instances. |
|
| 53 | ***/ |
|
| 54 | 0 | private static final DatagramSocketFactory __DEFAULT_SOCKET_FACTORY = |
| 55 | new DefaultDatagramSocketFactory(); |
|
| 56 | ||
| 57 | /*** The timeout to use after opening a socket. ***/ |
|
| 58 | protected int _timeout_; |
|
| 59 | ||
| 60 | /*** The datagram socket used for the connection. ***/ |
|
| 61 | protected DatagramSocket _socket_; |
|
| 62 | ||
| 63 | /*** |
|
| 64 | * A status variable indicating if the client's socket is currently open. |
|
| 65 | ***/ |
|
| 66 | protected boolean _isOpen_; |
|
| 67 | ||
| 68 | /*** The datagram socket's DatagramSocketFactory. ***/ |
|
| 69 | protected DatagramSocketFactory _socketFactory_; |
|
| 70 | ||
| 71 | /*** |
|
| 72 | * Default constructor for DatagramSocketClient. Initializes |
|
| 73 | * _socket_ to null, _timeout_ to 0, and _isOpen_ to false. |
|
| 74 | ***/ |
|
| 75 | public DatagramSocketClient() |
|
| 76 | 0 | { |
| 77 | 0 | _socket_ = null; |
| 78 | 0 | _timeout_ = 0; |
| 79 | 0 | _isOpen_ = false; |
| 80 | 0 | _socketFactory_ = __DEFAULT_SOCKET_FACTORY; |
| 81 | 0 | } |
| 82 | ||
| 83 | ||
| 84 | /*** |
|
| 85 | * Opens a DatagramSocket on the local host at the first available port. |
|
| 86 | * Also sets the timeout on the socket to the default timeout set |
|
| 87 | * by {@link #setDefaultTimeout setDefaultTimeout() }. |
|
| 88 | * <p> |
|
| 89 | * _isOpen_ is set to true after calling this method and _socket_ |
|
| 90 | * is set to the newly opened socket. |
|
| 91 | * <p> |
|
| 92 | * @exception SocketException If the socket could not be opened or the |
|
| 93 | * timeout could not be set. |
|
| 94 | ***/ |
|
| 95 | public void open() throws SocketException |
|
| 96 | { |
|
| 97 | 0 | _socket_ = _socketFactory_.createDatagramSocket(); |
| 98 | 0 | _socket_.setSoTimeout(_timeout_); |
| 99 | 0 | _isOpen_ = true; |
| 100 | 0 | } |
| 101 | ||
| 102 | ||
| 103 | /*** |
|
| 104 | * Opens a DatagramSocket on the local host at a specified port. |
|
| 105 | * Also sets the timeout on the socket to the default timeout set |
|
| 106 | * by {@link #setDefaultTimeout setDefaultTimeout() }. |
|
| 107 | * <p> |
|
| 108 | * _isOpen_ is set to true after calling this method and _socket_ |
|
| 109 | * is set to the newly opened socket. |
|
| 110 | * <p> |
|
| 111 | * @param port The port to use for the socket. |
|
| 112 | * @exception SocketException If the socket could not be opened or the |
|
| 113 | * timeout could not be set. |
|
| 114 | ***/ |
|
| 115 | public void open(int port) throws SocketException |
|
| 116 | { |
|
| 117 | 0 | _socket_ = _socketFactory_.createDatagramSocket(port); |
| 118 | 0 | _socket_.setSoTimeout(_timeout_); |
| 119 | 0 | _isOpen_ = true; |
| 120 | 0 | } |
| 121 | ||
| 122 | ||
| 123 | /*** |
|
| 124 | * Opens a DatagramSocket at the specified address on the local host |
|
| 125 | * at a specified port. |
|
| 126 | * Also sets the timeout on the socket to the default timeout set |
|
| 127 | * by {@link #setDefaultTimeout setDefaultTimeout() }. |
|
| 128 | * <p> |
|
| 129 | * _isOpen_ is set to true after calling this method and _socket_ |
|
| 130 | * is set to the newly opened socket. |
|
| 131 | * <p> |
|
| 132 | * @param port The port to use for the socket. |
|
| 133 | * @param laddr The local address to use. |
|
| 134 | * @exception SocketException If the socket could not be opened or the |
|
| 135 | * timeout could not be set. |
|
| 136 | ***/ |
|
| 137 | public void open(int port, InetAddress laddr) throws SocketException |
|
| 138 | { |
|
| 139 | 0 | _socket_ = _socketFactory_.createDatagramSocket(port, laddr); |
| 140 | 0 | _socket_.setSoTimeout(_timeout_); |
| 141 | 0 | _isOpen_ = true; |
| 142 | 0 | } |
| 143 | ||
| 144 | ||
| 145 | ||
| 146 | /*** |
|
| 147 | * Closes the DatagramSocket used for the connection. |
|
| 148 | * You should call this method after you've finished using the class |
|
| 149 | * instance and also before you call {@link #open open() } |
|
| 150 | * again. _isOpen_ is set to false and _socket_ is set to null. |
|
| 151 | * If you call this method when the client socket is not open, |
|
| 152 | * a NullPointerException is thrown. |
|
| 153 | ***/ |
|
| 154 | public void close() |
|
| 155 | { |
|
| 156 | 0 | _socket_.close(); |
| 157 | 0 | _socket_ = null; |
| 158 | 0 | _isOpen_ = false; |
| 159 | 0 | } |
| 160 | ||
| 161 | ||
| 162 | /*** |
|
| 163 | * Returns true if the client has a currently open socket. |
|
| 164 | * <p> |
|
| 165 | * @return True if the client has a curerntly open socket, false otherwise. |
|
| 166 | ***/ |
|
| 167 | public boolean isOpen() |
|
| 168 | { |
|
| 169 | 0 | return _isOpen_; |
| 170 | } |
|
| 171 | ||
| 172 | ||
| 173 | /*** |
|
| 174 | * Set the default timeout in milliseconds to use when opening a socket. |
|
| 175 | * After a call to open, the timeout for the socket is set using this value. |
|
| 176 | * This method should be used prior to a call to {@link #open open()} |
|
| 177 | * and should not be confused with {@link #setSoTimeout setSoTimeout()} |
|
| 178 | * which operates on the currently open socket. _timeout_ contains |
|
| 179 | * the new timeout value. |
|
| 180 | * <p> |
|
| 181 | * @param timeout The timeout in milliseconds to use for the datagram socket |
|
| 182 | * connection. |
|
| 183 | ***/ |
|
| 184 | public void setDefaultTimeout(int timeout) |
|
| 185 | { |
|
| 186 | 0 | _timeout_ = timeout; |
| 187 | 0 | } |
| 188 | ||
| 189 | ||
| 190 | /*** |
|
| 191 | * Returns the default timeout in milliseconds that is used when |
|
| 192 | * opening a socket. |
|
| 193 | * <p> |
|
| 194 | * @return The default timeout in milliseconds that is used when |
|
| 195 | * opening a socket. |
|
| 196 | ***/ |
|
| 197 | public int getDefaultTimeout() |
|
| 198 | { |
|
| 199 | 0 | return _timeout_; |
| 200 | } |
|
| 201 | ||
| 202 | ||
| 203 | /*** |
|
| 204 | * Set the timeout in milliseconds of a currently open connection. |
|
| 205 | * Only call this method after a connection has been opened |
|
| 206 | * by {@link #open open()}. |
|
| 207 | * <p> |
|
| 208 | * @param timeout The timeout in milliseconds to use for the currently |
|
| 209 | * open datagram socket connection. |
|
| 210 | ***/ |
|
| 211 | public void setSoTimeout(int timeout) throws SocketException |
|
| 212 | { |
|
| 213 | 0 | _socket_.setSoTimeout(timeout); |
| 214 | 0 | } |
| 215 | ||
| 216 | ||
| 217 | /*** |
|
| 218 | * Returns the timeout in milliseconds of the currently opened socket. |
|
| 219 | * If you call this method when the client socket is not open, |
|
| 220 | * a NullPointerException is thrown. |
|
| 221 | * <p> |
|
| 222 | * @return The timeout in milliseconds of the currently opened socket. |
|
| 223 | ***/ |
|
| 224 | public int getSoTimeout() throws SocketException |
|
| 225 | { |
|
| 226 | 0 | return _socket_.getSoTimeout(); |
| 227 | } |
|
| 228 | ||
| 229 | ||
| 230 | /*** |
|
| 231 | * Returns the port number of the open socket on the local host used |
|
| 232 | * for the connection. If you call this method when the client socket |
|
| 233 | * is not open, a NullPointerException is thrown. |
|
| 234 | * <p> |
|
| 235 | * @return The port number of the open socket on the local host used |
|
| 236 | * for the connection. |
|
| 237 | ***/ |
|
| 238 | public int getLocalPort() |
|
| 239 | { |
|
| 240 | 0 | return _socket_.getLocalPort(); |
| 241 | } |
|
| 242 | ||
| 243 | ||
| 244 | /*** |
|
| 245 | * Returns the local address to which the client's socket is bound. |
|
| 246 | * If you call this method when the client socket is not open, a |
|
| 247 | * NullPointerException is thrown. |
|
| 248 | * <p> |
|
| 249 | * @return The local address to which the client's socket is bound. |
|
| 250 | ***/ |
|
| 251 | public InetAddress getLocalAddress() |
|
| 252 | { |
|
| 253 | 0 | return _socket_.getLocalAddress(); |
| 254 | } |
|
| 255 | ||
| 256 | ||
| 257 | /*** |
|
| 258 | * Sets the DatagramSocketFactory used by the DatagramSocketClient |
|
| 259 | * to open DatagramSockets. If the factory value is null, then a default |
|
| 260 | * factory is used (only do this to reset the factory after having |
|
| 261 | * previously altered it). |
|
| 262 | * <p> |
|
| 263 | * @param factory The new DatagramSocketFactory the DatagramSocketClient |
|
| 264 | * should use. |
|
| 265 | ***/ |
|
| 266 | public void setDatagramSocketFactory(DatagramSocketFactory factory) |
|
| 267 | { |
|
| 268 | 0 | if (factory == null) |
| 269 | 0 | _socketFactory_ = __DEFAULT_SOCKET_FACTORY; |
| 270 | else |
|
| 271 | 0 | _socketFactory_ = factory; |
| 272 | 0 | } |
| 273 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |