FS-7526: add enable_fallback_format_fields for mod_amqp producer profiles if the…

FS-7526: add enable_fallback_format_fields for mod_amqp producer profiles if the profile param is set.

conf/vanilla/autoload_configs/amqp.conf.xml

@@ -25,10 +25,16 @@
 	<param name="circuit_breaker_ms" value="10000"/>
 	<param name="reconnect_interval_ms" value="1000"/>
 	<param name="send_queue_size" value="5000"/>
+	<param name="enable_fallback_format_fields" value="1"/>
 	
 	<!-- The routing key is made from the format string, using the header values in the event specified in the format_fields.-->
 	<!-- Fields that are prefixed with a # are treated as literals rather than doing a header lookup -->
 	<param name="format_fields" value="#FreeSWITCH,FreeSWITCH-Hostname,Event-Name,Event-Subclass,Unique-ID"/>
+
+	<!-- If enable_fallback_format_fields is enabled, then you can | separate event headers, and if the first does not exist
+	     then the system will check additional configured header values.
+	-->
+	<!-- <param name="format_fields" value="#FreeSWITCH,FreeSWITCH-Hostname|#Unknown,Event-Name,Event-Subclass,Unique-ID"/> -->
 	
 	<!--    <param name="eventFilter" value="SWITCH_EVENT_ALL"/> -->
 	<param name="event_filter" value="SWITCH_EVENT_CHANNEL_CREATE,SWITCH_EVENT_CHANNEL_DESTROY,SWITCH_EVENT_HEARTBEAT,SWITCH_EVENT_DTMF"/>

src/mod/event_handlers/mod_amqp/mod_amqp.h

@@ -104,6 +104,7 @@ typedef struct {
   int reconnect_interval_ms;
   int circuit_breaker_ms;
   switch_time_t circuit_breaker_reset_time;
+  switch_bool_t enable_fallback_format_fields;
 
   switch_bool_t running;
   switch_memory_pool_t *pool;
@@ -156,7 +157,8 @@ void * SWITCH_THREAD_FUNC mod_amqp_command_thread(switch_thread_t *thread, void
 
 /* producer */
 void mod_amqp_producer_event_handler(switch_event_t* evt);
-switch_status_t mod_amqp_producer_routing_key(char routingKey[MAX_AMQP_ROUTING_KEY_LENGTH],switch_event_t* evt, char* routingKeyEventHeaderNames[]);
+switch_status_t mod_amqp_producer_routing_key(mod_amqp_producer_profile_t *profile, char routingKey[MAX_AMQP_ROUTING_KEY_LENGTH],
+					      switch_event_t* evt, char* routingKeyEventHeaderNames[]);
 switch_status_t mod_amqp_producer_destroy(mod_amqp_producer_profile_t **profile);
 switch_status_t mod_amqp_producer_create(char *name, switch_xml_t cfg);
 void * SWITCH_THREAD_FUNC mod_amqp_producer_thread(switch_thread_t *thread, void *data);

src/mod/event_handlers/mod_amqp/mod_amqp_producer.c

@@ -45,7 +45,8 @@ void mod_amqp_producer_msg_destroy(mod_amqp_message_t **msg)
 	switch_safe_free(*msg);
 }
 
-switch_status_t mod_amqp_producer_routing_key(char routingKey[MAX_AMQP_ROUTING_KEY_LENGTH], switch_event_t* evt, char* routingKeyEventHeaderNames[])
+switch_status_t mod_amqp_producer_routing_key(mod_amqp_producer_profile_t *profile, char routingKey[MAX_AMQP_ROUTING_KEY_LENGTH],
+											  switch_event_t* evt, char* routingKeyEventHeaderNames[])
 {
 	int i = 0, idx = 0;
 
@@ -54,16 +55,41 @@ switch_status_t mod_amqp_producer_routing_key(char routingKey[MAX_AMQP_ROUTING_K
 			if (idx) {
 				routingKey[idx++] = '.';
 			}
-			if (routingKeyEventHeaderNames[i][0] == '#') {
-				strncpy(routingKey + idx, routingKeyEventHeaderNames[i] + 1, MAX_AMQP_ROUTING_KEY_LENGTH - idx);
+			if ( profile->enable_fallback_format_fields) {
+				int count = 0, x = 0;
+				char *argv[10];
+
+				count = switch_separate_string(routingKeyEventHeaderNames[i], '|', argv, (sizeof(argv) / sizeof(argv[0])));
+				for( x = 0; x < count; x++) {
+					if (argv[x][0] == '#') {
+						strncpy(routingKey + idx, argv[x] + 1, MAX_AMQP_ROUTING_KEY_LENGTH - idx);
+						break;
+					} else {
+						char *value = switch_event_get_header(evt, argv[x]);
+
+						if (!value) {
+							continue;
+						}
+
+						strncpy(routingKey + idx, value, MAX_AMQP_ROUTING_KEY_LENGTH - idx);
+
+						/* Replace dots with underscores so that the routing key does not get corrupted */
+						switch_replace_char(routingKey + idx, '.', '_', 0);
+					}
+				}
+				idx += strlen(routingKey + idx);
 			} else {
-				char *value = switch_event_get_header(evt, routingKeyEventHeaderNames[i]);
-				strncpy(routingKey + idx, value ? value : "", MAX_AMQP_ROUTING_KEY_LENGTH - idx);
-
-				/* Replace dots with underscores so that the routing key does not get corrupted */
-				switch_replace_char(routingKey + idx, '.', '_', 0);
+				if (routingKeyEventHeaderNames[i][0] == '#') {
+					strncpy(routingKey + idx, routingKeyEventHeaderNames[i] + 1, MAX_AMQP_ROUTING_KEY_LENGTH - idx);
+				} else {
+					char *value = switch_event_get_header(evt, routingKeyEventHeaderNames[i]);
+					strncpy(routingKey + idx, value ? value : "", MAX_AMQP_ROUTING_KEY_LENGTH - idx);
+
+					/* Replace dots with underscores so that the routing key does not get corrupted */
+					switch_replace_char(routingKey + idx, '.', '_', 0);
+				}
+				idx += strlen(routingKey + idx);
 			}
-			idx += strlen(routingKey + idx);
 		}
 	}
 	return SWITCH_STATUS_SUCCESS;
@@ -97,7 +123,7 @@ void mod_amqp_producer_event_handler(switch_event_t* evt)
 	switch_malloc(amqp_message, sizeof(mod_amqp_message_t));
 
 	switch_event_serialize_json(evt, &amqp_message->pjson);
-	mod_amqp_producer_routing_key(amqp_message->routing_key, evt, profile->format_fields);
+	mod_amqp_producer_routing_key(profile, amqp_message->routing_key, evt, profile->format_fields);
 
 	/* Queue the message to be sent by the worker thread, errors are reported only once per circuit breaker interval */
 	if (switch_queue_trypush(profile->send_queue, amqp_message) != SWITCH_STATUS_SUCCESS) {
@@ -221,6 +247,11 @@ switch_status_t mod_amqp_producer_create(char *name, switch_xml_t cfg)
 				if ( interval && interval > 0 ) {
 					profile->send_queue_size = interval;
 				}
+			} else if (!strncmp(var, "enable_fallback_format_fields", 29)) {
+				int interval = atoi(val);
+				if ( interval && interval > 0 ) {
+					profile->enable_fallback_format_fields = 1;
+				}
 			} else if (!strncmp(var, "exchange", 8)) {
 				exchange = switch_core_strdup(profile->pool, "TAP.Events");
 			} else if (!strncmp(var, "format_fields", 13)) {