Re: Multiple stack instances works in version 1.2

Becky,

This is a backwards compatibility (deprecated)  feature that may or may 
not work with other JAIN-SIP implementations. Implementations SHOULD (it 
is strongly recommeded that they do) support multiple stacks if the 
javax.sip.IP_ADDRESS property is specified -- each call to careate a new 
stack gets its own instance. The RI will support it and complaint 
implemetations *SHOULD* support it if they care about backwards 
compatibility. The TCK will not test for deprecated features but the RI 
will implement all deprecated features.

The current best practice would be to have a single stack and multiple 
Listening points, each with its own IP address and port. Note that each 
vendor (i.e. specified by path) gets its own stack instance however, so 
you can still have multiple stacks -- just not multiple stacks per 
vendor in a given jvm.

Ranga

Becky McElroy wrote:

> Hi,
>
> I certainly don't want to complain about this... just want to 
> understand it. I thought I saw someone say that in the new 1.2 stack 
> version, multiple SipStack's on one box wouldn't work. However, it 
> seems to work fine (I updated from CVS this past weekend).
>
> From my test program I can create two SipStacks, just like before, 
> using two different sets of properties with different IP addresses and 
> ports (same SipFactory used to create both stacks, a different 
> listening point per stack, same SipListener listening to both). 
> Everything gets created fine and messaging between two test phones (1 
> per stack) works fine, with or without a proxy inbetween.
>
> Again, not to complain (this is great) but just want to know if this 
> setup will continue to work as is, or can we expect it to break at 
> some point.
>
> Thanks,
> Becky
>
> ______________________________________
>
> public class TestTwoSipStacksNoProxy extends SipTestCase
> {
>    private static String IP_ADDRESS_1 = "127.0.0.1";
>    private static String IP_ADDRESS_2 = "192.168.1.102";
>      private SipStack sipStack1;
>    private SipStack sipStack2;
>
>    private SipPhone ua;
>
>    private Properties properties1 = new Properties();
>    private Properties properties2 = new Properties();
>
>    public TestTwoSipStacksNoProxy(String arg0)
>    {
>        super(arg0);
>              // when both stacks use same IP addr, get 
> TooManyListenersException
>        properties1.setProperty("javax.sip.IP_ADDRESS", IP_ADDRESS_1);
>        properties1.setProperty("javax.sip.RETRANSMISSION_FILTER", 
> "true");
>        properties1.setProperty("javax.sip.STACK_NAME", "testAgent");
>        properties1.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "32");
>        properties1.setProperty("gov.nist.javax.sip.DEBUG_LOG",
>                "testAgent_debug.txt");
>        properties1.setProperty("gov.nist.javax.sip.SERVER_LOG",
>                "testAgent_log.txt");
>        properties1.setProperty("gov.nist.javax.sip.READ_TIMEOUT", 
> "1000");
>
>        properties2.setProperty("javax.sip.IP_ADDRESS", IP_ADDRESS_2);
>        properties2.setProperty("javax.sip.RETRANSMISSION_FILTER", 
> "true");
>        properties2.setProperty("javax.sip.STACK_NAME", "testAgent2");
>        properties2.setProperty("gov.nist.javax.sip.TRACE_LEVEL", "32");
>        properties2.setProperty("gov.nist.javax.sip.DEBUG_LOG",
>                "testAgent2_debug.txt");
>        properties2.setProperty("gov.nist.javax.sip.SERVER_LOG",
>                "testAgent2_log.txt");
>        properties2.setProperty("gov.nist.javax.sip.READ_TIMEOUT", 
> "1000");
>    }
>
>    /*
>     * @see SipTestCase#setUp()
>     */
>    public void setUp() throws Exception
>    {
>        try
>        {
>            sipStack1 = new SipStack(null, 5060, properties1); // this 
> would be org.cafesip.sipunit.SipStack
>            sipStack2 = new SipStack(null, 5090, properties2); // ditto
>        }
>        catch (Exception ex)
>        {
>            fail("Exception: " + ex.getClass().getName() + ": "
>                    + ex.getMessage());
>            throw ex;
>        }
>
>        try
>        {
>            ua = sipStack1.createSipPhone("sip:[email protected]");
>        }
>        catch (Exception ex)
>        {
>            fail("Exception creating SipPhone: " + ex.getClass().getName()
>                    + ": " + ex.getMessage());
>            throw ex;
>        }
>    }
>
> etc.
> }
>
>
> org.cafesip.sipunit.SipStack:
>
>    /**
>     * A constructor for this class. Before establishing any SIP sessions,
>     * instantiate this class. You may provide the parameters for SIP 
> protocol
>     * binding on a specific TCP/UDP port, which will be used to 
> communicate
>     * with external SIP agents (a SIP proxy server, for example). A test
>     * program may contain one or more SipStack objects, each of which 
> may have
>     * one or more SipPhones.
>     *
>     * @param proto
>     *            SIP transport protocol, "tcp" or "udp" (default is 
> "udp").
>     * @param port
>     *            port on which this stack listens for messages 
> (default is
>     *            5060).
>     * @param props
>     *            properties of the SIP stack. These properties are the 
> same as
>     *            that defined for JAIN-SIP SipStack. If this parameter 
> has a
>     *            null value, we pick default values for you.
>     * @throws Exception
>     */
>    public SipStack(String proto, int port, Properties props) throws 
> Exception
>    {
>        if (sipFactory == null)
>        {
>            sipFactory = SipFactory.getInstance();
>            sipFactory.setPathName("gov.nist");
>        }
>
>        if (props == null)
>        {
>            props = defaultProperties;
>        }
>
>        if (props.getProperty("javax.sip.STACK_NAME") == null)
>        {
>            props.setProperty("javax.sip.STACK_NAME", "SipUnitTestAgent");
>        }
>
>        sipStack = sipFactory.createSipStack(props);
>
>        headerFactory = sipFactory.createHeaderFactory();
>        addressFactory = sipFactory.createAddressFactory();
>        messageFactory = sipFactory.createMessageFactory();
>
>        if (proto == null)
>        {
>            proto = DEFAULT_PROTOCOL;
>        }
>
>        if (port < 0)
>        {
>            port = DEFAULT_PORT;
>        }
>
>        ListeningPoint lp = sipStack.createListeningPoint(port, proto);
>
>        sipProvider = sipStack.createSipProvider(lp);
>        sipProvider.addSipListener(this);
>    }
>
> etc.
>
>
> _______________________________________________
> nist-sip mailing list
> [email protected]
> http://www-x.antd.nist.gov/mailman/listinfo/nist-sip
>


-- 
M. Ranganathan 

Advanced Networking Technologies Division,
National Institute of Standards and Technology (NIST),
100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899. 
tel:301 975 3664 , fax:301 590 0932 http://w3.antd.nist.gov/
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