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Hello</div>
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I'm doing a project where I need to route using dispatcher across multiple groups. i.e. when the customer makes a call, the "core" server makes a request to cgrates to get back a list of carriers that support that, and then want to work through them in order
of preference.</div>
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e.g. the string we get back from cgrates via evapi might be "2,1,3". i.e. try all Group 2 destinations, then group 1, then group 3.</div>
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Each of these is then a dispatcher group (with multiple dispatcher routes in each group). </div>
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When the call then gets to the "Group 2" server that in turn is also using dispatcher to handle multiple destinations, and if all of those destinations fail, it returns a 503 to the "core", which is then meant to try "Group 1", and so on.</div>
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The documentation on this is a bit sparse, but what I think I am meant to do (at the core level) is use ds_select_routes to load up the list of groups (<a href="https://kamailio.org/docs/modules/5.3.x/modules/dispatcher.html#dispatcher.f.ds_select_routes">https://kamailio.org/docs/modules/5.3.x/modules/dispatcher.html#dispatcher.f.ds_select_routes</a>) </div>
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if(ds_select_routes("2=4;1=4;3=4", "d", "0"))<br>
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{</div>
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t_on_failure("REROUTE");
<div> t_relay();</div>
exit;<br>
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}</div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">and then in my failure_route, if the error code is 503 I call ds_next_domain, e.g.</span></div>
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<span style="font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">failure_route[REROUTE] {
<div> if(t_check_status("503")) {</div>
<div> if(ds_next_domain()) {</div>
<div> t_on_failure("REROUTE");</div>
<div> t_relay();</div>
<div> exit;</div>
<div> }</div>
<div> }</div>
}<br>
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My problem is, that in applying theory to practice, I have ended up with a bunch of looping and it's not working right!</div>
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Does anyone have an example code for such a scenario?</div>
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many thanks</div>
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peter</div>
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