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SipConnectionNotifier (JSR180 SIP API for J2ME)
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javax.microedition.sip</FONT>
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Interface SipConnectionNotifier</H2>
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<DT><B>All Superinterfaces:</B> <DD>javax.microedition.io.Connection</DD>
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<DT>public interface <B>SipConnectionNotifier</B><DT>extends javax.microedition.io.Connection</DL>
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This interface defines a SIP server connection notifier. The SIP server connection is opened with <tt>Connector.open()</tt>using a SIP URI string with the host and user omitted. For the detailed specification of SIP server URIs see the section: <A HREF="./SipConnection.html#SERVERURI"><code>"SipConnection: Opening new server connection"</code></A>. <p> For example, URI <tt>sip:5060</tt> defines an inbound SIP server connection on port 5060. The local address can be discovered using the <tt>getLocalAddress()</tt> method. If the port number is already reserved the <tt>Connector.open()</tt> MUST throw <tt>IOException</tt>. <p> <tt>SipConnectionNotifier</tt> can be also opened with <tt>sips:</tt> protocol scheme, which indicates that this server connection accepts only requests over secure transport (as defined in RFC 3261 [1] for SIPS URIs). <p> <tt>SipConnectionNotifier</tt> is queueing received messages. In order to receive incoming requests application calls the <tt>acceptAndOpen()</tt> method, which returns a <tt>SipServerConnection</tt> instance. If there are no messages in the queue <tt>acceptAndOpen()</tt> will block until a new request is received. <tt>SipServerConnection</tt> holds the incoming SIP request message. <tt>SipServerConnection</tt> is used to initialize and send responses. <p> Access to SIP server connections may be restricted by the security policy of the device. <tt>Connector.open MUST</tt> check access for the initial SIP server connection and <tt>acceptAndOpen()</tt> MUST check before returning each new <tt>SipServerConnection</tt>. <p> A SIP server connection can be used to dynamically select an available port by omitting both the host and the port parameters in the connection SIP URI string. The string <tt>sip:</tt> defines an inbound SIP server connection on a port which is allocated by the system. To discover the assigned port number use the <tt>getLocalPort()</tt> method. <p> The <tt>SipConnectionNotifier</tt> offers also an asynchronous callback interface to wait for incoming requests. The interface is defined in <tt>SipServerConnectionListener</tt> , which the user has to implement in order to receive notifications about incoming requests. <p> Here is an example method, which opens an inbound SIP server connection: <p> <pre> public SipServerConnection openSipServerConnection() { SipConnectionNotifier scn = null; SipServerConnection ssc = null; try { // let the system select the port scn = (SipConnectionNotifier) Connector.open("sip:"); ssc = scn.acceptAndOpen(); return(ssc); } catch(Exception ex) { // handle IOException, InterruptedIOException, SecurityException // or SipException } } </pre> Here is another example class, which uses the callback listener interface: <pre> public class SipServer implements SipServerConnectionListener { SipServer(String uri) { try { // user selects the port scn = (SipConnectionNotifier) Connector.open("sip:5080"); scn.setListener(this); } catch(Exception ex) { // handle Exceptions } } public void notifyRequest(SipConnectionNotifier scn) { SipServerConnection ssc = scn.acceptAndOpen(); String method = ssc.getMethod(); // continue with the incoming request etc... } } </pre>
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<DT><B>See Also:</B><DD><A HREF="../../../javax/microedition/sip/SipConnection.html" title="interface in javax.microedition.sip"><CODE>SipConnection</CODE></A>, <A HREF="../../../javax/microedition/sip/SipServerConnection.html" title="interface in javax.microedition.sip"><CODE>SipServerConnection</CODE></A>, <A HREF="../../../javax/microedition/sip/SipClientConnection.html" title="interface in javax.microedition.sip"><CODE>SipClientConnection</CODE></A>, <A HREF="../../../javax/microedition/sip/SipServerConnectionListener.html" title="interface in javax.microedition.sip"><CODE>SipServerConnectionListener</CODE></A></DL>
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<CODE> <A HREF="../../../javax/microedition/sip/SipServerConnection.html" title="interface in javax.microedition.sip">SipServerConnection</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/sip/SipConnectionNotifier.html#acceptAndOpen()">acceptAndOpen</A></B>()</CODE>
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Accepts and opens a new <tt>SipServerConnection</tt> in this ⌨️ 快捷键说明
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