8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.net;
27
28 import java.io.FileDescriptor;
29 import java.io.IOException;
30 import java.nio.channels.ServerSocketChannel;
31 import java.security.AccessController;
32 import java.security.PrivilegedExceptionAction;
33 import java.util.Set;
34 import java.util.Collections;
35
36 /**
37 * This class implements server sockets. A server socket waits for
38 * requests to come in over the network. It performs some operation
39 * based on that request, and then possibly returns a result to the requester.
40 * <p>
41 * The actual work of the server socket is performed by an instance
42 * of the {@code SocketImpl} class. An application can
43 * change the socket factory that creates the socket
44 * implementation to configure itself to create sockets
45 * appropriate to the local firewall.
46 *
47 * @author unascribed
48 * @see java.net.SocketImpl
49 * @see java.net.ServerSocket#setSocketFactory(java.net.SocketImplFactory)
994 * @return A set of the socket options supported by this socket. This set
995 * may be empty if the socket's SocketImpl cannot be created.
996 *
997 * @since 9
998 */
999 public Set<SocketOption<?>> supportedOptions() {
1000 synchronized (ServerSocket.class) {
1001 if (optionsSet) {
1002 return options;
1003 }
1004 try {
1005 SocketImpl impl = getImpl();
1006 options = Collections.unmodifiableSet(impl.supportedOptions());
1007 } catch (IOException e) {
1008 options = Collections.emptySet();
1009 }
1010 optionsSet = true;
1011 return options;
1012 }
1013 }
1014 }
|
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.net;
27
28 import jdk.internal.misc.JavaNetSocketAccess;
29 import jdk.internal.misc.SharedSecrets;
30
31 import java.io.FileDescriptor;
32 import java.io.IOException;
33 import java.lang.reflect.Constructor;
34 import java.lang.reflect.InvocationTargetException;
35 import java.nio.channels.ServerSocketChannel;
36 import java.security.AccessController;
37 import java.security.PrivilegedExceptionAction;
38 import java.util.Set;
39 import java.util.Collections;
40
41 /**
42 * This class implements server sockets. A server socket waits for
43 * requests to come in over the network. It performs some operation
44 * based on that request, and then possibly returns a result to the requester.
45 * <p>
46 * The actual work of the server socket is performed by an instance
47 * of the {@code SocketImpl} class. An application can
48 * change the socket factory that creates the socket
49 * implementation to configure itself to create sockets
50 * appropriate to the local firewall.
51 *
52 * @author unascribed
53 * @see java.net.SocketImpl
54 * @see java.net.ServerSocket#setSocketFactory(java.net.SocketImplFactory)
999 * @return A set of the socket options supported by this socket. This set
1000 * may be empty if the socket's SocketImpl cannot be created.
1001 *
1002 * @since 9
1003 */
1004 public Set<SocketOption<?>> supportedOptions() {
1005 synchronized (ServerSocket.class) {
1006 if (optionsSet) {
1007 return options;
1008 }
1009 try {
1010 SocketImpl impl = getImpl();
1011 options = Collections.unmodifiableSet(impl.supportedOptions());
1012 } catch (IOException e) {
1013 options = Collections.emptySet();
1014 }
1015 optionsSet = true;
1016 return options;
1017 }
1018 }
1019
1020 static {
1021 SharedSecrets.setJavaNetSocketAccess(
1022 new JavaNetSocketAccess() {
1023 @Override
1024 public ServerSocket newServerSocket(SocketImpl impl) {
1025 return new ServerSocket(impl);
1026 }
1027
1028 @Override
1029 public SocketImpl newSocketImpl(Class<? extends SocketImpl> implClass) {
1030 try {
1031 Constructor<? extends SocketImpl> ctor =
1032 implClass.getDeclaredConstructor();
1033 return ctor.newInstance();
1034 } catch (NoSuchMethodException | InstantiationException |
1035 IllegalAccessException | InvocationTargetException e) {
1036 throw new AssertionError(e);
1037 }
1038 }
1039 }
1040 );
1041 }
1042 }
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