Production Deploy 8/19/2024

app/aws/s3.py

@@ -19,26 +19,52 @@
 JOBS_CACHE_HITS = "JOBS_CACHE_HITS"
 JOBS_CACHE_MISSES = "JOBS_CACHE_MISSES"
 
+# Global variable
+s3_client = None
+s3_resource = None
+
+
+def get_s3_client():
+    global s3_client
+    if s3_client is None:
+        access_key = current_app.config["CSV_UPLOAD_BUCKET"]["access_key_id"]
+        secret_key = current_app.config["CSV_UPLOAD_BUCKET"]["secret_access_key"]
+        region = current_app.config["CSV_UPLOAD_BUCKET"]["region"]
+        session = Session(
+            aws_access_key_id=access_key,
+            aws_secret_access_key=secret_key,
+            region_name=region,
+        )
+        s3_client = session.client("s3")
+    return s3_client
+
+
+def get_s3_resource():
+    global s3_resource
+    if s3_resource is None:
+        access_key = current_app.config["CSV_UPLOAD_BUCKET"]["access_key_id"]
+        secret_key = current_app.config["CSV_UPLOAD_BUCKET"]["secret_access_key"]
+        region = current_app.config["CSV_UPLOAD_BUCKET"]["region"]
+        session = Session(
+            aws_access_key_id=access_key,
+            aws_secret_access_key=secret_key,
+            region_name=region,
+        )
+        s3_resource = session.resource("s3", config=AWS_CLIENT_CONFIG)
+    return s3_resource
+
 
 def list_s3_objects():
-    bucket_name = current_app.config["CSV_UPLOAD_BUCKET"]["bucket"]
-    access_key = current_app.config["CSV_UPLOAD_BUCKET"]["access_key_id"]
-    secret_key = current_app.config["CSV_UPLOAD_BUCKET"]["secret_access_key"]
-    region = current_app.config["CSV_UPLOAD_BUCKET"]["region"]
-    session = Session(
-        aws_access_key_id=access_key,
-        aws_secret_access_key=secret_key,
-        region_name=region,
-    )
-    s3 = session.client("s3")
 
+    bucket_name = current_app.config["CSV_UPLOAD_BUCKET"]["bucket"]
+    s3_client = get_s3_client()
     try:
-        response = s3.list_objects_v2(Bucket=bucket_name)
+        response = s3_client.list_objects_v2(Bucket=bucket_name)
         while True:
             for obj in response.get("Contents", []):
                 yield obj["Key"]
             if "NextContinuationToken" in response:
-                response = s3.list_objects_v2(
+                response = s3_client.list_objects_v2(
                     Bucket=bucket_name,
                     ContinuationToken=response["NextContinuationToken"],
                 )
@@ -51,19 +77,11 @@ def list_s3_objects():
 
 
 def get_s3_files():
-    current_app.logger.info("Regenerate job cache #notify-admin-1200")
+
     bucket_name = current_app.config["CSV_UPLOAD_BUCKET"]["bucket"]
-    access_key = current_app.config["CSV_UPLOAD_BUCKET"]["access_key_id"]
-    secret_key = current_app.config["CSV_UPLOAD_BUCKET"]["secret_access_key"]
-    region = current_app.config["CSV_UPLOAD_BUCKET"]["region"]
-    session = Session(
-        aws_access_key_id=access_key,
-        aws_secret_access_key=secret_key,
-        region_name=region,
-    )
     objects = list_s3_objects()
 
-    s3res = session.resource("s3", config=AWS_CLIENT_CONFIG)
+    s3res = get_s3_resource()
     current_app.logger.info(
         f"JOBS cache length before regen: {len(JOBS)} #notify-admin-1200"
     )
@@ -99,12 +117,8 @@ def get_s3_file(bucket_name, file_location, access_key, secret_key, region):
 def download_from_s3(
     bucket_name, s3_key, local_filename, access_key, secret_key, region
 ):
-    session = Session(
-        aws_access_key_id=access_key,
-        aws_secret_access_key=secret_key,
-        region_name=region,
-    )
-    s3 = session.client("s3", config=AWS_CLIENT_CONFIG)
+
+    s3 = get_s3_client()
     result = None
     try:
         result = s3.download_file(bucket_name, s3_key, local_filename)
@@ -123,27 +137,28 @@ def download_from_s3(
 
 
 def get_s3_object(bucket_name, file_location, access_key, secret_key, region):
-    session = Session(
-        aws_access_key_id=access_key,
-        aws_secret_access_key=secret_key,
-        region_name=region,
-    )
-    s3 = session.resource("s3", config=AWS_CLIENT_CONFIG)
-    return s3.Object(bucket_name, file_location)
+
+    s3 = get_s3_resource()
+    try:
+        return s3.Object(bucket_name, file_location)
+    except botocore.exceptions.ClientError:
+        current_app.logger.error(
+            f"Can't retrieve S3 Object from {file_location}", exc_info=True
+        )
 
 
 def purge_bucket(bucket_name, access_key, secret_key, region):
-    session = Session(
-        aws_access_key_id=access_key,
-        aws_secret_access_key=secret_key,
-        region_name=region,
-    )
-    s3 = session.resource("s3", config=AWS_CLIENT_CONFIG)
+    s3 = get_s3_resource()
     bucket = s3.Bucket(bucket_name)
     bucket.objects.all().delete()
 
 
-def file_exists(bucket_name, file_location, access_key, secret_key, region):
+def file_exists(file_location):
+    bucket_name = current_app.config["CSV_UPLOAD_BUCKET"]["bucket"]
+    access_key = current_app.config["CSV_UPLOAD_BUCKET"]["access_key_id"]
+    secret_key = current_app.config["CSV_UPLOAD_BUCKET"]["secret_access_key"]
+    region = current_app.config["CSV_UPLOAD_BUCKET"]["region"]
+
     try:
         # try and access metadata of object
         get_s3_object(
@@ -172,9 +187,25 @@ def get_job_and_metadata_from_s3(service_id, job_id):
 
 
 def get_job_from_s3(service_id, job_id):
+    """
+    If and only if we hit a throttling exception of some kind, we want to try
+    exponential backoff.  However, if we are getting NoSuchKey or something
+    that indicates things are permanently broken, we want to give up right away
+    to save time.
+    """
+    # We have to make sure the retries don't take up to much time, because
+    # we might be retrieving dozens of jobs.  So max time is:
+    # 0.2 + 0.4 + 0.8 + 1.6 = 3.0 seconds
     retries = 0
-    max_retries = 3
-    backoff_factor = 1
+    max_retries = 4
+    backoff_factor = 0.2
+
+    if not file_exists(FILE_LOCATION_STRUCTURE.format(service_id, job_id)):
+        current_app.logger.error(
+            f"This file does not exist {FILE_LOCATION_STRUCTURE.format(service_id, job_id)}"
+        )
+        return None
+
     while retries < max_retries:
 
         try:
@@ -186,24 +217,34 @@ def get_job_from_s3(service_id, job_id):
                 "RequestTimeout",
                 "SlowDown",
             ]:
+                current_app.logger.error(
+                    f"Retrying job fetch {FILE_LOCATION_STRUCTURE.format(service_id, job_id)} retry_count={retries}",
+                    exc_info=True,
+                )
                 retries += 1
                 sleep_time = backoff_factor * (2**retries)  # Exponential backoff
                 time.sleep(sleep_time)
                 continue
             else:
+                # Typically this is "NoSuchKey"
                 current_app.logger.error(
-                    f"Failed to get job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)} from bucket",
+                    f"Failed to get job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)}",
                     exc_info=True,
                 )
                 return None
+
         except Exception:
             current_app.logger.error(
-                f"Failed to get job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)} from bucket",
+                f"Failed to get job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)} retry_count={retries}",
                 exc_info=True,
             )
             return None
 
-    raise Exception("Failed to get object after 3 attempts")
+    current_app.logger.error(
+        f"Never retrieved job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)}",
+        exc_info=True,
+    )
+    return None
 
 
 def incr_jobs_cache_misses():
@@ -274,19 +315,15 @@ def get_phone_number_from_s3(service_id, job_id, job_row_number):
     if job is None:
         current_app.logger.info(f"job {job_id} was not in the cache")
         job = get_job_from_s3(service_id, job_id)
+        # Even if it is None, put it here to avoid KeyErrors
         JOBS[job_id] = job
         incr_jobs_cache_misses()
     else:
         incr_jobs_cache_hits()
 
-    # If the job is None after our attempt to retrieve it from s3, it
-    # probably means the job is old and has been deleted from s3, in
-    # which case there is nothing we can do.  It's unlikely to run into
-    # this, but it could theoretically happen, especially if we ever
-    # change the task schedules
     if job is None:
-        current_app.logger.warning(
-            f"Couldnt find phone for job_id {job_id} row number {job_row_number} because job is missing"
+        current_app.logger.error(
+            f"Couldnt find phone for job {FILE_LOCATION_STRUCTURE.format(service_id, job_id)} because job is missing"
         )
         return "Unavailable"
 
@@ -331,7 +368,7 @@ def get_personalisation_from_s3(service_id, job_id, job_row_number):
     # change the task schedules
     if job is None:
         current_app.logger.warning(
-            "Couldnt find personalisation for job_id {job_id} row number {job_row_number} because job is missing"
+            f"Couldnt find personalisation for job_id {job_id} row number {job_row_number} because job is missing"
         )
         return {}
 

app/config.py

@@ -11,7 +11,6 @@
 
 class QueueNames(object):
     PERIODIC = "periodic-tasks"
-    PRIORITY = "priority-tasks"
     DATABASE = "database-tasks"
     SEND_SMS = "send-sms-tasks"
     CHECK_SMS = "check-sms_tasks"
@@ -30,7 +29,6 @@ class QueueNames(object):
     @staticmethod
     def all_queues():
         return [
-            QueueNames.PRIORITY,
             QueueNames.PERIODIC,
             QueueNames.DATABASE,
             QueueNames.SEND_SMS,

app/dao/provider_details_dao.py

@@ -1,7 +1,7 @@
 from datetime import datetime
 
 from flask import current_app
-from sqlalchemy import asc, desc, func
+from sqlalchemy import desc, func
 
 from app import db
 from app.dao.dao_utils import autocommit
@@ -33,20 +33,6 @@ def dao_get_provider_versions(provider_id):
     )
 
 
-def _adjust_provider_priority(provider, new_priority):
-    current_app.logger.info(
-        f"Adjusting provider priority - {provider.identifier} going from {provider.priority} to {new_priority}"
-    )
-    provider.priority = new_priority
-
-    # Automatic update so set as notify user
-    provider.created_by_id = current_app.config["NOTIFY_USER_ID"]
-
-    # update without commit so that both rows can be changed without ending the transaction
-    # and releasing the for_update lock
-    _update_provider_details_without_commit(provider)
-
-
 def _get_sms_providers_for_update(time_threshold):
     """
     Returns a list of providers, while holding a for_update lock on the provider details table, guaranteeing that those
@@ -86,11 +72,7 @@ def get_provider_details_by_notification_type(
     if supports_international:
         filters.append(ProviderDetails.supports_international == supports_international)
 
-    return (
-        ProviderDetails.query.filter(*filters)
-        .order_by(asc(ProviderDetails.priority))
-        .all()
-    )
+    return ProviderDetails.query.filter(*filters).all()
 
 
 @autocommit
@@ -135,7 +117,6 @@ def dao_get_provider_stats():
             ProviderDetails.id,
             ProviderDetails.display_name,
             ProviderDetails.identifier,
-            ProviderDetails.priority,
             ProviderDetails.notification_type,
             ProviderDetails.active,
             ProviderDetails.updated_at,
@@ -149,7 +130,6 @@ def dao_get_provider_stats():
         .outerjoin(User, ProviderDetails.created_by_id == User.id)
         .order_by(
             ProviderDetails.notification_type,
-            ProviderDetails.priority,
         )
         .all()
     )

app/models.py

@@ -1297,7 +1297,6 @@ class ProviderDetails(db.Model):
     id = db.Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
     display_name = db.Column(db.String, nullable=False)
     identifier = db.Column(db.String, nullable=False)
-    priority = db.Column(db.Integer, nullable=False)
     notification_type = enum_column(NotificationType, nullable=False)
     active = db.Column(db.Boolean, default=False, nullable=False)
     version = db.Column(db.Integer, default=1, nullable=False)
@@ -1322,7 +1321,6 @@ class ProviderDetailsHistory(db.Model, HistoryModel):
     id = db.Column(UUID(as_uuid=True), primary_key=True, nullable=False)
     display_name = db.Column(db.String, nullable=False)
     identifier = db.Column(db.String, nullable=False)
-    priority = db.Column(db.Integer, nullable=False)
     notification_type = enum_column(NotificationType, nullable=False)
     active = db.Column(db.Boolean, nullable=False)
     version = db.Column(db.Integer, primary_key=True, nullable=False)

app/notifications/rest.py

@@ -2,9 +2,8 @@
 
 from app import api_user, authenticated_service
 from app.aws.s3 import get_personalisation_from_s3, get_phone_number_from_s3
-from app.config import QueueNames
 from app.dao import notifications_dao
-from app.enums import KeyType, NotificationType, TemplateProcessType
+from app.enums import KeyType, NotificationType
 from app.errors import InvalidRequest, register_errors
 from app.notifications.process_notifications import (
     persist_notification,
@@ -168,11 +167,7 @@ def send_notification(notification_type):
         reply_to_text=template.reply_to_text,
     )
     if not simulated:
-        queue_name = (
-            QueueNames.PRIORITY
-            if template.process_type == TemplateProcessType.PRIORITY
-            else None
-        )
+        queue_name = None
         send_notification_to_queue(notification=notification_model, queue=queue_name)
 
     else:

app/provider_details/rest.py

@@ -23,7 +23,6 @@ def get_providers():
             "id": row.id,
             "display_name": row.display_name,
             "identifier": row.identifier,
-            "priority": row.priority,
             "notification_type": row.notification_type,
             "active": row.active,
             "updated_at": row.updated_at,