| java.lang.Object | ||||
| ↳ | java.nio.channels.spi.AbstractInterruptibleChannel | |||
| ↳ | java.nio.channels.SelectableChannel | |||
| ↳ | java.nio.channels.spi.AbstractSelectableChannel | |||
| ↳ | java.nio.channels.ServerSocketChannel | |||
Class Overview
A selectable channel for stream-oriented listening sockets.
Server-socket channels are not a complete abstraction of listening
network sockets. Binding and the manipulation of socket options must be
done through an associated ServerSocket object obtained by
invoking the socket method. It is not possible to create
a channel for an arbitrary, pre-existing server socket, nor is it possible
to specify the SocketImpl object to be used by a server
socket associated with a server-socket channel.
A server-socket channel is created by invoking the open
method of this class. A newly-created server-socket channel is open but not
yet bound. An attempt to invoke the accept method of an
unbound server-socket channel will cause a NotYetBoundException to
be thrown. A server-socket channel can be bound by invoking one of the
bind methods
of an associated server socket.
Server-socket channels are safe for use by multiple concurrent threads.
Summary
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Initializes a new instance of this class.
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| Public Methods | |||||||||||
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Accepts a connection made to this channel's socket.
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Opens a server-socket channel.
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Retrieves a server socket associated with this channel.
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Returns an operation set identifying this channel's supported
operations.
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[Expand]
Inherited Methods | |||||||||||
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From class
java.nio.channels.spi.AbstractSelectableChannel
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From class
java.nio.channels.SelectableChannel
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From class
java.nio.channels.spi.AbstractInterruptibleChannel
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From class
java.lang.Object
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From interface
java.io.Closeable
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From interface
java.nio.channels.Channel
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From interface
java.nio.channels.InterruptibleChannel
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Protected Constructors
Public Methods
public abstract SocketChannel accept ()
Accepts a connection made to this channel's socket.
If this channel is in non-blocking mode then this method will immediately return null if there are no pending connections. Otherwise it will block indefinitely until a new connection is available or an I/O error occurs.
The socket channel returned by this method, if any, will be in blocking mode regardless of the blocking mode of this channel.
This method performs exactly the same security checks as the accept method of the 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 checkAccept method.
Returns
- The socket channel for the new connection, or null if this channel is in non-blocking mode and no connection is available to be accepted
Throws
| If this channel is closed | |
| If another thread closes this channel while the accept operation is in progress | |
| 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 | |
| If this channel's socket has not yet been bound | |
| SecurityException | If a security manager has been installed and it does not permit access to the remote endpoint of the new connection |
| IOException | If some other I/O error occurs |
public static ServerSocketChannel open ()
Opens a server-socket channel.
The new channel is created by invoking the openServerSocketChannel method of the system-wide default SelectorProvider object.
The new channel's socket is initially unbound; it must be bound to a
specific address via one of its socket's bind methods before
connections can be accepted.
Returns
- A new socket channel
Throws
| IOException | If an I/O error occurs |
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public abstract ServerSocket socket ()
Retrieves a server socket associated with this channel.
The returned object will not declare any public methods that are not
declared in the ServerSocket class.
Returns
- A server socket associated with this channel
public final int validOps ()
Returns an operation set identifying this channel's supported operations.
Server-socket channels only support the accepting of new
connections, so this method returns OP_ACCEPT.
Returns
- The valid-operation set