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--- cookbooks:devel:core [2020/11/26 15:32] – [async_workers] miconda
+++ cookbooks:devel:core [2020/11/26 15:40] – [kemi.reply_route_callback] miconda
@@ Line 1115: / Line 1115: @@
 kemi.onsend_route_callback="ksr_my_reply_route"
 </code>
+==== kemi.pre_routing_callback ====
+Set the name of callback function in the KEMI script to be executed as the equivalent of `event_route[core:pre-routing]` block (from the native configuration file).
+Default value: none
+Set it to empty string or "none" to skip execution of this callback function.
+Example:
+<code c>
+kemi.pre_routing_callback="ksr_pre_routing"
+</code>
 ==== latency_cfg_log ====
@@ Line 3451: / Line 3466: @@
 }
 </code>
+  * **event_route[core:pre-routing]** - executed by core on receiving SIP traffic before running request_route or reply_route.
+    * if drop is used, then the message is not processed further with request_route or reply_route in the same process. This can be useful together with sworker module which can delegate the processing to another worker.
+<code c>
+async_workers_group="name=reg;workers=4"
+...
+event_route[core:pre-routing] {
+    xinfo("pre-routing rules\n");
+    if(is_method("REGISTER")) {
+        # delegate processing of REGISTERs to a special group of workers
+        if(sworker_task("reg")) {
+            drop;
+        }
+    }
+}
+</code>
 === Module Event Routes ===