Module java.base

Package javax.net

Class ServerSocketFactory

java.lang.Object

javax.net.ServerSocketFactory

Direct Known Subclasses:

SSLServerSocketFactory

public abstract class ServerSocketFactory
extends Object

This class creates server sockets. It may be subclassed by other factories, which create particular types of server sockets. This provides a general framework for the addition of public socket-level functionality. It is the server side analogue of a socket factory, and similarly provides a way to capture a variety of policies related to the sockets being constructed.

Like socket factories, server Socket factory instances have methods used to create sockets. There is also an environment specific default server socket factory; frameworks will often use their own customized factory.

Since:

1.4

See Also:

• SocketFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ServerSocketFactory()	Creates a server socket factory.

Method Summary

Modifier and Type	Method	Description
ServerSocket	createServerSocket()	Returns an unbound server socket.
abstract ServerSocket	createServerSocket(int port)	Returns a server socket bound to the specified port.
abstract ServerSocket	createServerSocket(int port, int backlog)	Returns a server socket bound to the specified port, and uses the specified connection backlog.
abstract ServerSocket	createServerSocket(int port, int backlog, InetAddress ifAddress)	Returns a server socket bound to the specified port, with a specified listen backlog and local IP.
static ServerSocketFactory	getDefault()	Returns a copy of the environment's default socket factory.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ServerSocketFactory

protected ServerSocketFactory()

Creates a server socket factory.

Method Details

getDefault

public static ServerSocketFactory getDefault()

Returns a copy of the environment's default socket factory.

Returns:

the ServerSocketFactory

createServerSocket

public ServerSocket createServerSocket()
                                throws IOException

Returns an unbound server socket. The socket is configured with the socket options (such as accept timeout) given to this factory.

Returns:

the unbound socket

Throws:

IOException - if the socket cannot be created

See Also:

• ServerSocket.bind(java.net.SocketAddress)
• ServerSocket.bind(java.net.SocketAddress, int)
• ServerSocket()

createServerSocket

public abstract ServerSocket createServerSocket(int port)
                                         throws IOException

Returns a server socket bound to the specified port. The socket is configured with the socket options (such as accept timeout) given to this factory.

If there is a security manager, its checkListen method is called with the port argument as its argument to ensure the operation is allowed. This could result in a SecurityException.

Parameters:

port - the port to listen to

Returns:

the ServerSocket

Throws:

IOException - for networking errors

SecurityException - if a security manager exists and its checkListen method doesn't allow the operation.

IllegalArgumentException - if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.

See Also:

• SecurityManager.checkListen(int)
• ServerSocket(int)

createServerSocket

public abstract ServerSocket createServerSocket(int port,
 int backlog)
                                         throws IOException

Returns a server socket bound to the specified port, and uses the specified connection backlog. The socket is configured with the socket options (such as accept timeout) given to this factory.

The backlog argument must be a positive value greater than 0. If the value passed if equal or less than 0, then the default value will be assumed.

If there is a security manager, its checkListen method is called with the port argument as its argument to ensure the operation is allowed. This could result in a SecurityException.

Parameters:

port - the port to listen to

backlog - how many connections are queued

Returns:

the ServerSocket

Throws:

IOException - for networking errors

SecurityException - if a security manager exists and its checkListen method doesn't allow the operation.

IllegalArgumentException - if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.

See Also:

• SecurityManager.checkListen(int)
• ServerSocket(int, int)

createServerSocket

public abstract ServerSocket createServerSocket(int port,
 int backlog,
 InetAddress ifAddress)
                                         throws IOException

Returns a server socket bound to the specified port, with a specified listen backlog and local IP.

The ifAddress argument can be used on a multi-homed host for a ServerSocket that will only accept connect requests to one of its addresses. If ifAddress is null, it will accept connections on all local addresses. The socket is configured with the socket options (such as accept timeout) given to this factory.

The backlog argument must be a positive value greater than 0. If the value passed if equal or less than 0, then the default value will be assumed.

If there is a security manager, its checkListen method is called with the port argument as its argument to ensure the operation is allowed. This could result in a SecurityException.

Parameters:

port - the port to listen to

backlog - how many connections are queued

ifAddress - the network interface address to use

Returns:

the ServerSocket

Throws:

IOException - for networking errors

SecurityException - if a security manager exists and its checkListen method doesn't allow the operation.

IllegalArgumentException - if the port parameter is outside the specified range of valid port values, which is between 0 and 65535, inclusive.

See Also:

• SecurityManager.checkListen(int)
• ServerSocket(int, int, java.net.InetAddress)