44 * send} and {@link #receive receive} methods to be used. A datagram channel may be
45 * connected, by invoking its {@link #connect connect} method, in order to
46 * avoid the overhead of the security checks are otherwise performed as part of
47 * every send and receive operation. A datagram channel must be connected in
48 * order to use the {@link #read(java.nio.ByteBuffer) read} and {@link
49 * #write(java.nio.ByteBuffer) write} methods, since those methods do not
50 * accept or return socket addresses.
51 *
52 * <p> Once connected, a datagram channel remains connected until it is
53 * disconnected or closed. Whether or not a datagram channel is connected may
54 * be determined by invoking its {@link #isConnected isConnected} method.
55 *
56 * <p> Socket options are configured using the {@link #setOption(SocketOption,Object)
57 * setOption} method. A datagram channel to an Internet Protocol socket supports
58 * the following options:
59 * <blockquote>
60 * <table class="striped">
61 * <caption style="display:none">Socket options</caption>
62 * <thead>
63 * <tr>
64 * <th>Option Name</th>
65 * <th>Description</th>
66 * </tr>
67 * </thead>
68 * <tbody>
69 * <tr>
70 * <td> {@link java.net.StandardSocketOptions#SO_SNDBUF SO_SNDBUF} </td>
71 * <td> The size of the socket send buffer </td>
72 * </tr>
73 * <tr>
74 * <td> {@link java.net.StandardSocketOptions#SO_RCVBUF SO_RCVBUF} </td>
75 * <td> The size of the socket receive buffer </td>
76 * </tr>
77 * <tr>
78 * <td> {@link java.net.StandardSocketOptions#SO_REUSEADDR SO_REUSEADDR} </td>
79 * <td> Re-use address </td>
80 * </tr>
81 * <tr>
82 * <td> {@link java.net.StandardSocketOptions#SO_BROADCAST SO_BROADCAST} </td>
83 * <td> Allow transmission of broadcast datagrams </td>
84 * </tr>
85 * <tr>
86 * <td> {@link java.net.StandardSocketOptions#IP_TOS IP_TOS} </td>
87 * <td> The Type of Service (ToS) octet in the Internet Protocol (IP) header </td>
88 * </tr>
89 * <tr>
90 * <td> {@link java.net.StandardSocketOptions#IP_MULTICAST_IF IP_MULTICAST_IF} </td>
91 * <td> The network interface for Internet Protocol (IP) multicast datagrams </td>
92 * </tr>
93 * <tr>
94 * <td> {@link java.net.StandardSocketOptions#IP_MULTICAST_TTL
95 * IP_MULTICAST_TTL} </td>
96 * <td> The <em>time-to-live</em> for Internet Protocol (IP) multicast
97 * datagrams </td>
98 * </tr>
99 * <tr>
100 * <td> {@link java.net.StandardSocketOptions#IP_MULTICAST_LOOP
101 * IP_MULTICAST_LOOP} </td>
102 * <td> Loopback for Internet Protocol (IP) multicast datagrams </td>
103 * </tr>
104 * </tbody>
105 * </table>
106 * </blockquote>
107 * Additional (implementation specific) options may also be supported.
108 *
109 * <p> Datagram channels are safe for use by multiple concurrent threads. They
110 * support concurrent reading and writing, though at most one thread may be
111 * reading and at most one thread may be writing at any given time. </p>
112 *
113 * @author Mark Reinhold
114 * @author JSR-51 Expert Group
115 * @since 1.4
116 */
117
118 public abstract class DatagramChannel
119 extends AbstractSelectableChannel
120 implements ByteChannel, ScatteringByteChannel, GatheringByteChannel, MulticastChannel
121 {
|
44 * send} and {@link #receive receive} methods to be used. A datagram channel may be
45 * connected, by invoking its {@link #connect connect} method, in order to
46 * avoid the overhead of the security checks are otherwise performed as part of
47 * every send and receive operation. A datagram channel must be connected in
48 * order to use the {@link #read(java.nio.ByteBuffer) read} and {@link
49 * #write(java.nio.ByteBuffer) write} methods, since those methods do not
50 * accept or return socket addresses.
51 *
52 * <p> Once connected, a datagram channel remains connected until it is
53 * disconnected or closed. Whether or not a datagram channel is connected may
54 * be determined by invoking its {@link #isConnected isConnected} method.
55 *
56 * <p> Socket options are configured using the {@link #setOption(SocketOption,Object)
57 * setOption} method. A datagram channel to an Internet Protocol socket supports
58 * the following options:
59 * <blockquote>
60 * <table class="striped">
61 * <caption style="display:none">Socket options</caption>
62 * <thead>
63 * <tr>
64 * <th scope="col">Option Name</th>
65 * <th scope="col">Description</th>
66 * </tr>
67 * </thead>
68 * <tbody>
69 * <tr>
70 * <th scope="row"> {@link java.net.StandardSocketOptions#SO_SNDBUF SO_SNDBUF} </th>
71 * <td> The size of the socket send buffer </td>
72 * </tr>
73 * <tr>
74 * <th scope="row"> {@link java.net.StandardSocketOptions#SO_RCVBUF SO_RCVBUF} </th>
75 * <td> The size of the socket receive buffer </td>
76 * </tr>
77 * <tr>
78 * <th scope="row"> {@link java.net.StandardSocketOptions#SO_REUSEADDR SO_REUSEADDR} </th>
79 * <td> Re-use address </td>
80 * </tr>
81 * <tr>
82 * <th scope="row"> {@link java.net.StandardSocketOptions#SO_BROADCAST SO_BROADCAST} </th>
83 * <td> Allow transmission of broadcast datagrams </td>
84 * </tr>
85 * <tr>
86 * <th scope="row"> {@link java.net.StandardSocketOptions#IP_TOS IP_TOS} </th>
87 * <td> The Type of Service (ToS) octet in the Internet Protocol (IP) header </td>
88 * </tr>
89 * <tr>
90 * <th scope="row"> {@link java.net.StandardSocketOptions#IP_MULTICAST_IF IP_MULTICAST_IF} </th>
91 * <td> The network interface for Internet Protocol (IP) multicast datagrams </td>
92 * </tr>
93 * <tr>
94 * <th scope="row"> {@link java.net.StandardSocketOptions#IP_MULTICAST_TTL
95 * IP_MULTICAST_TTL} </th>
96 * <td> The <em>time-to-live</em> for Internet Protocol (IP) multicast
97 * datagrams </td>
98 * </tr>
99 * <tr>
100 * <th scope="row"> {@link java.net.StandardSocketOptions#IP_MULTICAST_LOOP
101 * IP_MULTICAST_LOOP} </th>
102 * <td> Loopback for Internet Protocol (IP) multicast datagrams </td>
103 * </tr>
104 * </tbody>
105 * </table>
106 * </blockquote>
107 * Additional (implementation specific) options may also be supported.
108 *
109 * <p> Datagram channels are safe for use by multiple concurrent threads. They
110 * support concurrent reading and writing, though at most one thread may be
111 * reading and at most one thread may be writing at any given time. </p>
112 *
113 * @author Mark Reinhold
114 * @author JSR-51 Expert Group
115 * @since 1.4
116 */
117
118 public abstract class DatagramChannel
119 extends AbstractSelectableChannel
120 implements ByteChannel, ScatteringByteChannel, GatheringByteChannel, MulticastChannel
121 {
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