--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/nio/channels/ServerSocketChannel.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,297 @@
+/*
+ * Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.nio.channels;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.SocketOption;
+import java.net.SocketAddress;
+import java.nio.channels.spi.AbstractSelectableChannel;
+import java.nio.channels.spi.SelectorProvider;
+
+/**
+ * A selectable channel for stream-oriented listening sockets.
+ *
+ * <p> A server-socket channel is created by invoking the {@link #open() open}
+ * method of this class. It is not possible to create a channel for an arbitrary,
+ * pre-existing {@link ServerSocket}. A newly-created server-socket channel is
+ * open but not yet bound. An attempt to invoke the {@link #accept() accept}
+ * method of an unbound server-socket channel will cause a {@link NotYetBoundException}
+ * to be thrown. A server-socket channel can be bound by invoking one of the
+ * {@link #bind(java.net.SocketAddress,int) bind} methods defined by this class.
+ *
+ * <p> Socket options are configured using the {@link #setOption(SocketOption,Object)
+ * setOption} method. Server-socket channels support the following options:
+ * <blockquote>
+ * <table class="striped">
+ * <caption style="display:none">Socket options</caption>
+ * <thead>
+ * <tr>
+ * <th scope="col">Option Name</th>
+ * <th scope="col">Description</th>
+ * </tr>
+ * </thead>
+ * <tbody>
+ * <tr>
+ * <th scope="row"> {@link java.net.StandardSocketOptions#SO_RCVBUF SO_RCVBUF} </th>
+ * <td> The size of the socket receive buffer </td>
+ * </tr>
+ * <tr>
+ * <th scope="row"> {@link java.net.StandardSocketOptions#SO_REUSEADDR SO_REUSEADDR} </th>
+ * <td> Re-use address </td>
+ * </tr>
+ * </tbody>
+ * </table>
+ * </blockquote>
+ * Additional (implementation specific) options may also be supported.
+ *
+ * <p> Server-socket channels are safe for use by multiple concurrent threads.
+ * </p>
+ *
+ * @author Mark Reinhold
+ * @author JSR-51 Expert Group
+ * @since 1.4
+ */
+
+public abstract class ServerSocketChannel
+ extends AbstractSelectableChannel
+ implements NetworkChannel
+{
+
+ /**
+ * Initializes a new instance of this class.
+ *
+ * @param provider
+ * The provider that created this channel
+ */
+ protected ServerSocketChannel(SelectorProvider provider) {
+ super(provider);
+ }
+
+ /**
+ * Opens a server-socket channel.
+ *
+ * <p> The new channel is created by invoking the {@link
+ * java.nio.channels.spi.SelectorProvider#openServerSocketChannel
+ * openServerSocketChannel} method of the system-wide default {@link
+ * java.nio.channels.spi.SelectorProvider} object.
+ *
+ * <p> The new channel's socket is initially unbound; it must be bound to a
+ * specific address via one of its socket's {@link
+ * java.net.ServerSocket#bind(SocketAddress) bind} methods before
+ * connections can be accepted. </p>
+ *
+ * @return A new socket channel
+ *
+ * @throws IOException
+ * If an I/O error occurs
+ */
+ public static ServerSocketChannel open() throws IOException {
+ return SelectorProvider.provider().openServerSocketChannel();
+ }
+
+ /**
+ * Returns an operation set identifying this channel's supported
+ * operations.
+ *
+ * <p> Server-socket channels only support the accepting of new
+ * connections, so this method returns {@link SelectionKey#OP_ACCEPT}.
+ * </p>
+ *
+ * @return The valid-operation set
+ */
+ public final int validOps() {
+ return SelectionKey.OP_ACCEPT;
+ }
+
+
+ // -- ServerSocket-specific operations --
+
+ /**
+ * Binds the channel's socket to a local address and configures the socket
+ * to listen for connections.
+ *
+ * <p> An invocation of this method is equivalent to the following:
+ * <blockquote><pre>
+ * bind(local, 0);
+ * </pre></blockquote>
+ *
+ * @param local
+ * The local address to bind the socket, or {@code null} to bind
+ * to an automatically assigned socket address
+ *
+ * @return This channel
+ *
+ * @throws AlreadyBoundException {@inheritDoc}
+ * @throws UnsupportedAddressTypeException {@inheritDoc}
+ * @throws ClosedChannelException {@inheritDoc}
+ * @throws IOException {@inheritDoc}
+ * @throws SecurityException
+ * If a security manager has been installed and its {@link
+ * SecurityManager#checkListen checkListen} method denies the
+ * operation
+ *
+ * @since 1.7
+ */
+ public final ServerSocketChannel bind(SocketAddress local)
+ throws IOException
+ {
+ return bind(local, 0);
+ }
+
+ /**
+ * Binds the channel's socket to a local address and configures the socket to
+ * listen for connections.
+ *
+ * <p> This method is used to establish an association between the socket and
+ * a local address. Once an association is established then the socket remains
+ * bound until the channel is closed.
+ *
+ * <p> The {@code backlog} parameter is the maximum number of pending
+ * connections on the socket. Its exact semantics are implementation specific.
+ * In particular, an implementation may impose a maximum length or may choose
+ * to ignore the parameter altogther. If the {@code backlog} parameter has
+ * the value {@code 0}, or a negative value, then an implementation specific
+ * default is used.
+ *
+ * @param local
+ * The address to bind the socket, or {@code null} to bind to an
+ * automatically assigned socket address
+ * @param backlog
+ * The maximum number of pending connections
+ *
+ * @return This channel
+ *
+ * @throws AlreadyBoundException
+ * If the socket is already bound
+ * @throws UnsupportedAddressTypeException
+ * If the type of the given address is not supported
+ * @throws ClosedChannelException
+ * If this channel is closed
+ * @throws IOException
+ * If some other I/O error occurs
+ * @throws SecurityException
+ * If a security manager has been installed and its {@link
+ * SecurityManager#checkListen checkListen} method denies the
+ * operation
+ *
+ * @since 1.7
+ */
+ public abstract ServerSocketChannel bind(SocketAddress local, int backlog)
+ throws IOException;
+
+ /**
+ * @throws UnsupportedOperationException {@inheritDoc}
+ * @throws IllegalArgumentException {@inheritDoc}
+ * @throws ClosedChannelException {@inheritDoc}
+ * @throws IOException {@inheritDoc}
+ *
+ * @since 1.7
+ */
+ public abstract <T> ServerSocketChannel setOption(SocketOption<T> name, T value)
+ throws IOException;
+
+ /**
+ * Retrieves a server socket associated with this channel.
+ *
+ * <p> The returned object will not declare any public methods that are not
+ * declared in the {@link java.net.ServerSocket} class. </p>
+ *
+ * @return A server socket associated with this channel
+ */
+ public abstract ServerSocket socket();
+
+ /**
+ * Accepts a connection made to this channel's socket.
+ *
+ * <p> If this channel is in non-blocking mode then this method will
+ * immediately return {@code null} if there are no pending connections.
+ * Otherwise it will block indefinitely until a new connection is available
+ * or an I/O error occurs.
+ *
+ * <p> The socket channel returned by this method, if any, will be in
+ * blocking mode regardless of the blocking mode of this channel.
+ *
+ * <p> This method performs exactly the same security checks as the {@link
+ * java.net.ServerSocket#accept accept} method of the {@link
+ * java.net.ServerSocket} class. That is, if a security manager has been
+ * installed then for each new connection this method verifies that the
+ * address and port number of the connection's remote endpoint are
+ * permitted by the security manager's {@link
+ * java.lang.SecurityManager#checkAccept checkAccept} method. </p>
+ *
+ * @return The socket channel for the new connection,
+ * or {@code null} if this channel is in non-blocking mode
+ * and no connection is available to be accepted
+ *
+ * @throws ClosedChannelException
+ * If this channel is closed
+ *
+ * @throws AsynchronousCloseException
+ * If another thread closes this channel
+ * while the accept operation is in progress
+ *
+ * @throws ClosedByInterruptException
+ * If another thread interrupts the current thread
+ * while the accept operation is in progress, thereby
+ * closing the channel and setting the current thread's
+ * interrupt status
+ *
+ * @throws NotYetBoundException
+ * If this channel's socket has not yet been bound
+ *
+ * @throws SecurityException
+ * If a security manager has been installed
+ * and it does not permit access to the remote endpoint
+ * of the new connection
+ *
+ * @throws IOException
+ * If some other I/O error occurs
+ */
+ public abstract SocketChannel accept() throws IOException;
+
+ /**
+ * {@inheritDoc}
+ * <p>
+ * If there is a security manager set, its {@code checkConnect} method is
+ * called with the local address and {@code -1} as its arguments to see
+ * if the operation is allowed. If the operation is not allowed,
+ * a {@code SocketAddress} representing the
+ * {@link java.net.InetAddress#getLoopbackAddress loopback} address and the
+ * local port of the channel's socket is returned.
+ *
+ * @return The {@code SocketAddress} that the socket is bound to, or the
+ * {@code SocketAddress} representing the loopback address if
+ * denied by the security manager, or {@code null} if the
+ * channel's socket is not bound
+ *
+ * @throws ClosedChannelException {@inheritDoc}
+ * @throws IOException {@inheritDoc}
+ */
+ @Override
+ public abstract SocketAddress getLocalAddress() throws IOException;
+
+}