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MID Profile: Interface SocketConnection
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javax.microedition.io</FONT>
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Interface SocketConnection</H2>
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<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../javax/microedition/io/Connection.html">Connection</A>, <A HREF="../../../javax/microedition/io/InputConnection.html">InputConnection</A>, <A HREF="../../../javax/microedition/io/OutputConnection.html">OutputConnection</A>, <A HREF="../../../javax/microedition/io/StreamConnection.html">StreamConnection</A></DD>
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<DT><B>All Known Subinterfaces:</B> <DD><A HREF="../../../javax/microedition/io/SecureConnection.html">SecureConnection</A></DD>
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<DT>public interface <B>SocketConnection</B><DT>extends <A HREF="../../../javax/microedition/io/StreamConnection.html">StreamConnection</A></DL>
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This interface defines the socket stream connection. <P> 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. <code>socket://host.com:79</code> defines a target socket on the <code>host.com</code> system at port <code>79</code>. <P>Note that RFC1900 recommends the use of names rather than IP numbers for best results in the event of IP number reassignment. </P> <H3> Closing Streams </H3> <P> Every <code>StreamConnection</code> provides a <code>Connection</code> object as well as an <code>InputStream</code> and <code>OutputStream</code> to handle the I/O associated with the connection. Each of these interfaces has its own <code>close()</code> 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 <code>InputStream</code> will permit the <code>OutputStream</code> to continue sending data. </P> <P> Once the input or output stream has been closed, it can only be reopened with a call to <code>Connector.open()</code>. The application will receive an <code>IOException</code> if an attempt is made to reopen the stream. </P> <H2> BNF Format for Connector.open() string </H2> <P> The URI must conform to the BNF syntax specified below. If the URI does not conform to this syntax, an <code>IllegalArgumentException</code> is thrown. </P> <TABLE BORDER="1"> <TR> <TD><socket_connection_string> </TD> <TD>::= "<strong>socket://</strong>"<hostport> </TD> </TR> <TR> <TD><hostport> </TD> <TD>::= <I>host</I> ":" <I>port </I> </TD> </TR> <TR> <TD><host> </TD> <TD>::= <I>host name or IP address </I> (omitted for inbound connections, See <a href="ServerSocketConnection.html">ServerSocketConnection</a>) </TD> </TR> <TR> <TD><port> </TD> <TD>::= <I>numeric port number </I> </TD> </TR> </TABLE> <H3> Examples </H3> <P> The following examples show how a <code>SocketConnection</code> would be used to access a sample loopback program. </P> <PRE> 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(); </PRE>
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<DT><B>Since: </B><DD>MIDP 2.0</DD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#DELAY">DELAY</A></B></CODE>
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Socket option for the small buffer <em>writing delay</em> (0).</TD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#KEEPALIVE">KEEPALIVE</A></B></CODE>
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Socket option for the <em>keep alive</em> feature (2).</TD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#LINGER">LINGER</A></B></CODE>
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Socket option for the <em>linger time</em> to wait in seconds before closing a connection with pending data output (1).</TD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#RCVBUF">RCVBUF</A></B></CODE>
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Socket option for the size of the <em>receiving buffer</em> (3).</TD>
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<CODE>static byte</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#SNDBUF">SNDBUF</A></B></CODE>
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Socket option for the size of the <em>sending buffer</em> (4).</TD>
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<CODE> <A HREF="../../../java/lang/String.html">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#getAddress()">getAddress</A></B>()</CODE>
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Gets the remote address to which the socket is bound.</TD>
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<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#getLocalAddress()">getLocalAddress</A></B>()</CODE>
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Gets the local address to which the socket is bound.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#getLocalPort()">getLocalPort</A></B>()</CODE>
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Returns the local port to which this socket is bound.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#getPort()">getPort</A></B>()</CODE>
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Returns the remote port to which this socket is bound.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#getSocketOption(byte)">getSocketOption</A></B>(byte option)</CODE>
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Get a socket option for the connection.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/io/SocketConnection.html#setSocketOption(byte, int)">setSocketOption</A></B>(byte option, int value)</CODE>
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Set a socket option for the connection.</TD>
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