SocketFactory
public
abstract
class
SocketFactory
extends Object
Known indirect subclasses
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This class creates sockets. It may be subclassed by other factories,
which create particular subclasses of sockets and thus provide a general
framework for the addition of public socket-level functionality.
Socket factories are a simple way to capture a variety of policies
related to the sockets being constructed, producing such sockets in
a way which does not require special configuration of the code which
asks for the sockets:
- Due to polymorphism of both factories and sockets, different
kinds of sockets can be used by the same application code just
by passing it different kinds of factories.
- Factories can themselves be customized with parameters used
in socket construction. So for example, factories could be
customized to return sockets with different networking timeouts
or security parameters already configured.
- The sockets returned to the application can be subclasses
of java.net.Socket, so that they can directly expose new APIs
for features such as compression, security, record marking,
statistics collection, or firewall tunneling.
Factory classes are specified by environment-specific configuration
mechanisms. For example, the getDefault method could return
a factory that was appropriate for a particular user or applet, and a
framework could use a factory customized to its own purposes.
Summary
Inherited methods |
From class
java.lang.Object
Object
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clone()
Creates and returns a copy of this object.
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boolean
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equals(Object obj)
Indicates whether some other object is "equal to" this one.
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void
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finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
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final
Class<?>
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getClass()
Returns the runtime class of this Object .
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int
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hashCode()
Returns a hash code value for the object.
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final
void
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notify()
Wakes up a single thread that is waiting on this object's
monitor.
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final
void
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notifyAll()
Wakes up all threads that are waiting on this object's monitor.
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String
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toString()
Returns a string representation of the object.
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final
void
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wait(long timeoutMillis, int nanos)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
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final
void
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wait(long timeoutMillis)
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted, or until a
certain amount of real time has elapsed.
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final
void
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wait()
Causes the current thread to wait until it is awakened, typically
by being notified or interrupted.
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Protected constructors
SocketFactory
protected SocketFactory ()
Creates a SocketFactory
.
Public methods
createSocket
public abstract Socket createSocket (String host,
int port)
Creates a socket and connects it to the specified remote host
at the specified remote port. This socket is configured using
the socket options established for this factory.
If there is a security manager, its checkConnect
method is called with the host address and port
as its arguments. This could result in a SecurityException.
Parameters |
host |
String : the server host name with which to connect, or
null for the loopback address. |
port |
int : the server port |
createSocket
public abstract Socket createSocket (InetAddress host,
int port)
Creates a socket and connects it to the specified port number
at the specified address. This socket is configured using
the socket options established for this factory.
If there is a security manager, its checkConnect
method is called with the host address and port
as its arguments. This could result in a SecurityException.
Parameters |
host |
InetAddress : the server host |
port |
int : the server port |
createSocket
public abstract Socket createSocket (InetAddress address,
int port,
InetAddress localAddress,
int localPort)
Creates a socket and connect it to the specified remote address
on the specified remote port. The socket will also be bound
to the local address and port suplied. The socket is configured using
the socket options established for this factory.
If there is a security manager, its checkConnect
method is called with the host address and port
as its arguments. This could result in a SecurityException.
Parameters |
address |
InetAddress : the server network address |
port |
int : the server port |
localAddress |
InetAddress : the client network address |
localPort |
int : the client port |
Throws |
IOException |
if an I/O error occurs when creating the socket |
SecurityException |
if a security manager exists and its
checkConnect method doesn't allow the operation. |
IllegalArgumentException |
if the port parameter or localPort
parameter is outside the specified range of valid port values,
which is between 0 and 65535, inclusive. |
NullPointerException |
if address is null. |
createSocket
public abstract Socket createSocket (String host,
int port,
InetAddress localHost,
int localPort)
Creates a socket and connects it to the specified remote host
on the specified remote port.
The socket will also be bound to the local address and port supplied.
This socket is configured using
the socket options established for this factory.
If there is a security manager, its checkConnect
method is called with the host address and port
as its arguments. This could result in a SecurityException.
Parameters |
host |
String : the server host name with which to connect, or
null for the loopback address. |
port |
int : the server port |
localHost |
InetAddress : the local address the socket is bound to |
localPort |
int : the local port the socket is bound to |
Throws |
IOException |
if an I/O error occurs when creating the socket |
SecurityException |
if a security manager exists and its
checkConnect method doesn't allow the operation. |
UnknownHostException |
if the host is not known |
IllegalArgumentException |
if the port parameter or localPort
parameter is outside the specified range of valid port values,
which is between 0 and 65535, inclusive. |
createSocket
public Socket createSocket ()
Creates an unconnected socket.
Returns |
Socket |
the unconnected socket |
getDefault
public static SocketFactory getDefault ()
Returns a copy of the environment's default socket factory.