Review feedback: error tolerance, logging, etc.

src/registrar/config/settings.py

@@ -49,6 +49,9 @@ env_base_url = env.str("DJANGO_BASE_URL")
 secret_login_key = b64decode(secret("DJANGO_SECRET_LOGIN_KEY", ""))
 secret_key = secret("DJANGO_SECRET_KEY")
 
+secret_aws_ses_key_id = secret("AWS_ACCESS_KEY_ID", None)
+secret_aws_ses_key = secret("AWS_SECRET_ACCESS_KEY", None)
+
 
 # region: Basic Django Config-----------------------------------------------###
 
@@ -214,8 +217,8 @@ AUTH_USER_MODEL = "registrar.User"
 # region: Email-------------------------------------------------------------###
 
 # Configuration for accessing AWS SES
-AWS_ACCESS_KEY_ID = env.str("AWS_ACCESS_KEY_ID", None)
-AWS_SECRET_ACCESS_KEY = env.str("AWS_SECRET_ACCESS_KEY", None)
+AWS_ACCESS_KEY_ID = secret_aws_ses_key_id
+AWS_SECRET_ACCESS_KEY = secret_aws_ses_key
 AWS_REGION = "us-gov-west-1"
 
 # email address to use for various automated correspondence

src/registrar/models/domain_application.py

@@ -8,7 +8,7 @@ from django.db import models
 from django_fsm import FSMField, transition  # type: ignore
 
 from .utility.time_stamped_model import TimeStampedModel
-from ..utility.email import send_templated_email
+from ..utility.email import send_templated_email, EmailSendingError
 
 
 logger = logging.getLogger(__name__)
@@ -478,11 +478,14 @@ class DomainApplication(TimeStampedModel):
         if self.submitter is None or self.submitter.email is None:
             logger.warn("Cannot send confirmation email, no submitter email address.")
             return
-        send_templated_email(
-            "emails/submission_confirmation.txt",
-            self.submitter.email,
-            context={"id": self.id, "domain_name": self.requested_domain.name},
-        )
+        try:
+            send_templated_email(
+                "emails/submission_confirmation.txt",
+                self.submitter.email,
+                context={"id": self.id, "domain_name": self.requested_domain.name},
+            )
+        except EmailSendingError:
+            logger.warning("Failed to send confirmation email", exc_info=True)
 
     @transition(field="status", source=STARTED, target=SUBMITTED)
     def submit(self):

src/registrar/utility/email.py

@@ -6,6 +6,13 @@ from django.conf import settings
 from django.template.loader import get_template
 
 
+class EmailSendingError(RuntimeError):
+
+    """Local error for handling all failures when sending email."""
+
+    pass
+
+
 def send_templated_email(template_name: str, to_address: str, context={}):
     """Send an email built from a template to one email address.
 
@@ -16,19 +23,26 @@ def send_templated_email(template_name: str, to_address: str, context={}):
     template = get_template(template_name)
     email_body = template.render(context=context)
 
-    ses_client = boto3.client(
-        "sesv2",
-        region_name=settings.AWS_REGION,
-        aws_access_key_id=settings.AWS_ACCESS_KEY_ID,
-        aws_secret_access_key=settings.AWS_SECRET_ACCESS_KEY,
-    )
-    ses_client.send_email(
-        FromEmailAddress=settings.DEFAULT_FROM_EMAIL,
-        Destination={"ToAddresses": [to_address]},
-        Content={
-            "Simple": {
-                "Subject": {"Data": "Thank you for applying for a .gov domain"},
-                "Body": {"Text": {"Data": email_body}},
+    try:
+        ses_client = boto3.client(
+            "sesv2",
+            region_name=settings.AWS_REGION,
+            aws_access_key_id=settings.AWS_ACCESS_KEY_ID,
+            aws_secret_access_key=settings.AWS_SECRET_ACCESS_KEY,
+        )
+    except Exception as exc:
+        raise EmailSendingError("Could not access the SES client.") from exc
+
+    try:
+        ses_client.send_email(
+            FromEmailAddress=settings.DEFAULT_FROM_EMAIL,
+            Destination={"ToAddresses": [to_address]},
+            Content={
+                "Simple": {
+                    "Subject": {"Data": "Thank you for applying for a .gov domain"},
+                    "Body": {"Text": {"Data": email_body}},
+                },
             },
-        },
-    )
+        )
+    except Exception as exc:
+        raise EmailSendingError("Could not send SES email.") from exc