| This interface defines the socket stream connection.
A socket is accessed using a generic connection string with an explicit host
and port number. The host may be specified as a fully qualified host name or
IPv4 number.
e.g. socket://host.com:79 defines a target socket on the
host.com system at
port 79.
Note that
RFC1900 recommends the use of names rather than IP numbers for best results
in the event of IP number reassignment.
Closing Streams
Every StreamConnection provides a Connection
object as well as an InputStream and OutputStream
to handle the I/O associated with the connection. Each of these interfaces
has its own close() method. For systems that support
duplex communication over the socket connection, closing of the
input or output stream SHOULD shutdown just that side of the
connection. e.g. closing the InputStream will permit the
OutputStream to continue sending data.
Once the input or output stream has been closed, it can only be reopened
with a call to Connector.open(). The application will receive
an IOException if an attempt is made to reopen the stream.
BNF Format for Connector.open() string
The URI must conform to the BNF syntax specified below. If the URI
does not conform to this syntax, an IllegalArgumentException
is thrown.
| <socket_connection_string> |
::= "socket://"<hostport> |
| <hostport> |
::= host ":" port |
| <host> |
::= host name or IP address (omitted for inbound connections,
See ServerSocketConnection)
|
| <port> |
::= numeric port number |
Examples
The following examples show how a SocketConnection
would be used to access a sample loopback program.
SocketConnection sc = (SocketConnection)
Connector.open("socket://host.com:79");
sc.setSocketOption(SocketConnection.LINGER, 5);
InputStream is = sc.openInputStream();
OutputStream os = sc.openOutputStream();
os.write("\r\n".getBytes());
int ch = 0;
while(ch != -1) {
ch = is.read();
}
is.close();
os.close();
sc.close();
|