Add dummy exports

CDK has a limitation where if you attempt to remove all references to
a resource from another stack, CDK will attempt to remove the export
for that resource, which then fails because it sees there is still an
external dependency on that resource, creating a 'deadly embrace'
See aws/aws-cdk#12778.

The workaround for this is to set dummy export values to trick CDK
into keeping the unused exports around until you've deployed your
updates to the dependent stack.

backend/compact-connect/stacks/persistent_stack/__init__.py

@@ -179,15 +179,32 @@ def _add_mock_data_resources(self):
             event_bus=self.data_event_bus,
         )
 
+        # These dummy exports are required until we remove dependencies from the api stack
+        # see https://github.com/aws/aws-cdk/issues/3414
+        self.export_value(self.mock_bulk_uploads_bucket.bucket_name)
+        self.export_value(self.mock_bulk_uploads_bucket.bucket_arn)
+
         self.mock_license_table = LicenseTable(
-            self, 'MockLicenseTable', encryption_key=self.shared_encryption_key, removal_policy=RemovalPolicy.DESTROY
+            self, 'MockLicenseTable', encryption_key=self.shared_encryption_key,
+            removal_policy=RemovalPolicy.DESTROY
         )
 
+        # These dummy exports are required until we remove dependencies from the api stack
+        # see https://github.com/aws/aws-cdk/issues/3414
+        self.export_value(self.mock_license_table.table_name)
+        self.export_value(self.mock_license_table.table_arn)
+
     def _add_deprecated_data_resources(self):
         self.license_table = LicenseTable(
-            self, 'LicenseTable', encryption_key=self.shared_encryption_key, removal_policy=RemovalPolicy.DESTROY
+            self, 'LicenseTable', encryption_key=self.shared_encryption_key,
+            removal_policy=RemovalPolicy.DESTROY
         )
 
+        # These dummy exports are required until we remove dependencies from the api stack
+        # see https://github.com/aws/aws-cdk/issues/3414
+        self.export_value(self.license_table.table_name)
+        self.export_value(self.license_table.table_arn)
+
     def _add_data_resources(self, removal_policy: RemovalPolicy):
         self.bulk_uploads_bucket = BulkUploadsBucket(
             self,