fix: Allow API destinations to reuse connections (#108)

Author: magreenbaum

examples/with-api-destination/main.tf

@@ -24,6 +24,11 @@ module "eventbridge" {
       event_pattern = jsonencode({ "source" : ["myapp.orders"] })
       state         = "ENABLED" # conflicts with enabled which is deprecated
     }
+    refunds = {
+      description   = "Capture all refund data"
+      event_pattern = jsonencode({ "source" : ["myapp.refunds"] })
+      state         = "ENABLED" # conflicts with enabled which is deprecated
+    }
   }
 
   targets = {
@@ -39,6 +44,13 @@ module "eventbridge" {
         attach_role_arn = true
       }
     ]
+    refunds = [
+      {
+        name            = "send-refunds-to-github"
+        destination     = "refunds_github"
+        attach_role_arn = true
+      }
+    ]
   }
 
   connections = {
@@ -152,6 +164,14 @@ module "eventbridge" {
       http_method                      = "POST"
       invocation_rate_limit_per_second = 20
     }
+    # reuse github connection
+    refunds_github = {
+      description                      = "my refunds to github endpoint"
+      invocation_endpoint              = "https://smee.io/QaM356V2p1PFFZS"
+      http_method                      = "POST"
+      invocation_rate_limit_per_second = 20
+      connection_name                  = "github"
+    }
   }
 }
 

main.tf

@@ -425,7 +425,7 @@ resource "aws_cloudwatch_event_api_destination" "this" {
   invocation_endpoint              = each.value.invocation_endpoint
   http_method                      = each.value.http_method
   invocation_rate_limit_per_second = lookup(each.value, "invocation_rate_limit_per_second", null)
-  connection_arn                   = aws_cloudwatch_event_connection.this[each.value.name].arn
+  connection_arn                   = try(aws_cloudwatch_event_connection.this[each.value.connection_name].arn, aws_cloudwatch_event_connection.this[each.value.name].arn)
 }
 
 resource "aws_scheduler_schedule_group" "this" {