diff --git a/WORKSPACE b/WORKSPACE
index 94470f9..6731735 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -62,18 +62,18 @@ load("@arrdem_source_pypi//:requirements.bzl", "install_deps")
 # Call it to define repos for your requirements.
 install_deps()
 
-git_repository(
-   name = "rules_zapp",
-   remote = "https://git.arrdem.com/arrdem/rules_zapp.git",
-   commit = "72f82e0ace184fe862f1b19c4f71c3bc36cf335b",
-   # tag = "0.1.2",
-)
-
-# local_repository(
-#     name = "rules_zapp",
-#     path = "/home/arrdem/Documents/hobby/programming/lang/python/rules_zapp",
+# git_repository(
+#    name = "rules_zapp",
+#    remote = "https://git.arrdem.com/arrdem/rules_zapp.git",
+#    commit = "72f82e0ace184fe862f1b19c4f71c3bc36cf335b",
+#    # tag = "0.1.2",
 # )
 
+local_repository(
+    name = "rules_zapp",
+    path = "/home/arrdem/Documents/hobby/programming/lang/python/rules_zapp",
+)
+
 ####################################################################################################
 # Docker support
 ####################################################################################################
diff --git a/projects/tentacles/src/python/tentacles/__main__.py b/projects/tentacles/src/python/tentacles/__main__.py
index 370915a..0e95cea 100644
--- a/projects/tentacles/src/python/tentacles/__main__.py
+++ b/projects/tentacles/src/python/tentacles/__main__.py
@@ -17,9 +17,10 @@ from tentacles.blueprints import (
     printer_ui,
     user_ui,
 )
+from tentacles.db import Db
 from tentacles.globals import _ctx, Ctx, ctx
-from tentacles.store import Store
-from tentacles.workers import Worker
+from tentacles.workers import *
+from tentacles.workers import assign_jobs, Worker
 
 
 @click.group()
@@ -28,7 +29,7 @@ def cli():
 
 
 def db_factory(app):
-    store = Store(app.config.get("db", {}).get("uri"))
+    store = Db(app.config.get("db", {}).get("uri"))
     store.connect()
     return store
 
@@ -38,10 +39,11 @@ def custom_ctx(app, wsgi_app):
         store = db_factory(app)
         token = _ctx.set(Ctx(store))
         try:
-            return wsgi_app(environ, start_response)
+            with store.savepoint():
+                return wsgi_app(environ, start_response)
         finally:
-            _ctx.reset(token)
             store.close()
+            _ctx.reset(token)
 
     return helper
 
@@ -56,21 +58,21 @@ def user_session():
     if (
         (
             (session_id := request.cookies.get("sid", ""))
-            and (uid := ctx.db.try_key(session_id))
+            and (row := ctx.db.try_key(kid=session_id))
         )
         or (
             request.authorization
             and request.authorization.token
-            and (uid := ctx.db.try_key(request.authorization.token))
+            and (row := ctx.db.try_key(kid=request.authorization.token))
         )
         or (
             (api_key := request.headers.get("x-api-key"))
-            and (uid := ctx.db.try_key(api_key))
+            and (row := ctx.db.try_key(kid=api_key))
         )
     ):
-        ctx.sid = session_id
-        ctx.uid = uid
-        user = ctx.db.fetch_user(uid)
+        ctx.sid = row.id
+        ctx.uid = row.user_id
+        user = ctx.db.fetch_user(row.user_id)
         ctx.gid = user.group_id
         ctx.username = user.name
         ctx.is_admin = user.group_id == 0
@@ -104,11 +106,12 @@ def make_app():
 @click.option("--config", type=Path)
 def serve(hostname: str, port: int, config: Path):
     logging.basicConfig(
-        format="%(asctime)s %(relativeCreated)6d %(threadName)s - %(name)s - %(levelname)s -  %(message)s",
+        format="%(asctime)s %(threadName)s - %(name)s - %(levelname)s -  %(message)s",
         level=logging.INFO,
     )
 
     logging.getLogger("tentacles").setLevel(logging.DEBUG)
+    logging.getLogger("tentacles.db").setLevel(logging.DEBUG - 1)
 
     app = make_app()
 
@@ -133,8 +136,14 @@ def serve(hostname: str, port: int, config: Path):
     server.shutdown_timeout = 1
     server.subscribe()
 
-    # Spawn the worker thread
-    Worker(cherrypy.engine, app, db_factory, frequency=5).start()
+    # Spawn the worker thread(s)
+
+    Worker(cherrypy.engine, app, db_factory, poll_printers, frequency=5).start()
+    Worker(cherrypy.engine, app, db_factory, assign_jobs, frequency=5).start()
+    Worker(cherrypy.engine, app, db_factory, push_jobs, frequency=5).start()
+    Worker(cherrypy.engine, app, db_factory, revoke_jobs, frequency=5).start()
+    Worker(cherrypy.engine, app, db_factory, pull_jobs, frequency=5).start()
+    Worker(cherrypy.engine, app, db_factory, send_emails, frequency=5).start()
 
     # Run the server
     cherrypy.engine.start()
diff --git a/projects/tentacles/src/python/tentacles/blueprints/api.py b/projects/tentacles/src/python/tentacles/blueprints/api.py
index 5d312db..8a89935 100644
--- a/projects/tentacles/src/python/tentacles/blueprints/api.py
+++ b/projects/tentacles/src/python/tentacles/blueprints/api.py
@@ -98,10 +98,12 @@ def create_file(location: Optional[str] = None):
             return {"error": "file exists already"}, 409
 
         file.save(sanitized_path)
-        fid = ctx.db.create_file(ctx.uid, file.filename, sanitized_path)
+        fid = ctx.db.create_file(
+            uid=ctx.uid, filename=file.filename, path=sanitized_path
+        )
 
         if request.form.get("print", "").lower() == "true":
-            ctx.db.create_job(ctx.uid, fid)
+            ctx.db.create_job(uid=ctx.uid, fid=fid)
 
         return {"status": "ok"}, 202
 
@@ -119,7 +121,7 @@ def get_files():
                 "owner": ctx.uid,
                 "upload_date": f.upload_date,
             }
-            for f in ctx.db.list_files(ctx.uid)
+            for f in ctx.db.list_files(uid=ctx.uid)
         ]
     }, 200
 
@@ -150,7 +152,7 @@ def get_jobs():
                 "finished_at": j.finished_at,
                 "printer_id": j.printer_id,
             }
-            for j in ctx.db.list_jobs()
+            for j in ctx.db.list_jobs(uid=ctx.uid)
         ]
     }, 200
 
diff --git a/projects/tentacles/src/python/tentacles/blueprints/file_ui.py b/projects/tentacles/src/python/tentacles/blueprints/file_ui.py
index 4555b09..3fa087a 100644
--- a/projects/tentacles/src/python/tentacles/blueprints/file_ui.py
+++ b/projects/tentacles/src/python/tentacles/blueprints/file_ui.py
@@ -42,9 +42,10 @@ def manipulate_files():
                 return render_template("files.html.j2"), code
 
         case "delete":
-            file = ctx.db.fetch_file(ctx.uid, int(request.form.get("file_id")))
+            file = ctx.db.fetch_file(uid=ctx.uid, fid=int(request.form.get("file_id")))
             if any(
-                job.finished_at is None for job in ctx.db.list_jobs_by_file(file.id)
+                job.finished_at is None
+                for job in ctx.db.list_jobs_by_file(uid=ctx.uid, fid=file.id)
             ):
                 flash("File is in use", category="error")
                 return render_template("files.html.j2"), 400
@@ -52,7 +53,7 @@ def manipulate_files():
             if os.path.exists(file.path):
                 os.unlink(file.path)
 
-            ctx.db.delete_file(ctx.uid, file.id)
+            ctx.db.delete_file(uid=ctx.uid, fid=file.id)
             flash("File deleted", category="info")
 
         case _:
diff --git a/projects/tentacles/src/python/tentacles/blueprints/job_ui.py b/projects/tentacles/src/python/tentacles/blueprints/job_ui.py
index ead52da..7e9bc4a 100644
--- a/projects/tentacles/src/python/tentacles/blueprints/job_ui.py
+++ b/projects/tentacles/src/python/tentacles/blueprints/job_ui.py
@@ -29,22 +29,24 @@ def list_jobs():
 def manipulate_jobs():
     match request.form.get("action"):
         case "enqueue":
-            ctx.db.create_job(ctx.uid, int(request.form.get("file_id")))
+            ctx.db.create_job(uid=ctx.uid, fid=int(request.form.get("file_id")))
             flash("Job created!", category="info")
 
         case "duplicate":
-            if job := ctx.db.fetch_job(ctx.uid, int(request.form.get("job_id"))):
-                ctx.db.create_job(ctx.uid, job.file_id)
+            if job := ctx.db.fetch_job(
+                uid=ctx.uid, jid=int(request.form.get("job_id"))
+            ):
+                ctx.db.create_job(uid=ctx.uid, fid=job.file_id)
                 flash("Job created!", category="info")
             else:
                 flash("Could not duplicate", category="error")
 
         case "cancel":
-            ctx.db.cancel_job(ctx.uid, int(request.form.get("job_id")))
+            ctx.db.cancel_job(uid=ctx.uid, jid=int(request.form.get("job_id")))
             flash("Cancellation reqested", category="info")
 
         case "delete":
-            ctx.db.delete_job(ctx.uid, int(request.form.get("job_id")))
+            ctx.db.delete_job(uid=ctx.uid, jid=int(request.form.get("job_id")))
             flash("Job deleted", category="info")
 
         case _:
diff --git a/projects/tentacles/src/python/tentacles/blueprints/printer_ui.py b/projects/tentacles/src/python/tentacles/blueprints/printer_ui.py
index 3c71ebc..f005f67 100644
--- a/projects/tentacles/src/python/tentacles/blueprints/printer_ui.py
+++ b/projects/tentacles/src/python/tentacles/blueprints/printer_ui.py
@@ -36,9 +36,10 @@ def add_printer():
             assert request.form["url"]
             assert request.form["api_key"]
             ctx.db.try_create_printer(
-                request.form["name"],
-                request.form["url"],
-                request.form["api_key"],
+                name=request.form["name"],
+                url=request.form["url"],
+                api_key=request.form["api_key"],
+                sid=0,  # Disconnected
             )
             flash("Printer created")
             return redirect("/printers")
diff --git a/projects/tentacles/src/python/tentacles/blueprints/user_ui.py b/projects/tentacles/src/python/tentacles/blueprints/user_ui.py
index c9bfeae..2a7ffb3 100644
--- a/projects/tentacles/src/python/tentacles/blueprints/user_ui.py
+++ b/projects/tentacles/src/python/tentacles/blueprints/user_ui.py
@@ -42,13 +42,13 @@ def get_login():
 
 @BLUEPRINT.route("/user/login", methods=["POST"])
 def post_login():
-    if sid := ctx.db.try_login(
-        username := request.form["username"],
-        salt(request.form["password"]),
-        timedelta(days=1),
+    if row := ctx.db.try_login(
+        username=(username := request.form["username"]),
+        password=salt(request.form["password"]),
+        ttl=timedelta(days=1),
     ):
         resp = redirect("/")
-        resp.set_cookie("sid", sid)
+        resp.set_cookie("sid", row.id)
         flash(f"Welcome, {username}", category="success")
         return resp
 
@@ -72,7 +72,7 @@ def post_register():
         username = request.form["username"]
         email = request.form["email"]
         group_id = 1  # Normal users
-        status_id = -2  # Unverified
+        status_id = -3  # Unverified
 
         for user_config in current_app.config.get("users", []):
             if user_config["email"] == email:
@@ -85,13 +85,17 @@ def post_register():
                 break
 
         if user := ctx.db.try_create_user(
-            username, email, salt(request.form["password"]), group_id, status_id
+            username=username,
+            email=email,
+            password=salt(request.form["password"]),
+            gid=group_id,
+            sid=status_id,
         ):
-            if user.status_id == -2:
+            if user.status_id == -3:
                 ctx.db.create_email(
-                    user.id,
-                    "Tentacles email confirmation",
-                    render_template(
+                    uid=user.id,
+                    subject="Tentacles email confirmation",
+                    body=render_template(
                         "verification_email.html.j2",
                         username=user.name,
                         token_id=user.verification_token,
@@ -103,6 +107,10 @@ def post_register():
                     "Please check your email for a verification request",
                     category="success",
                 )
+
+            elif user.status_id == 1:
+                flash("Welcome, please log in", category="success")
+
         return render_template("register.html.j2")
 
     except Exception as e:
@@ -115,7 +123,7 @@ def post_register():
 @BLUEPRINT.route("/user/logout")
 def logout():
     # Invalidate the user's authorization
-    ctx.db.delete_key(ctx.uid, ctx.sid)
+    ctx.db.delete_key(uid=ctx.uid, kid=ctx.sid)
     resp = redirect("/")
     resp.set_cookie("sid", "")
     return resp
@@ -132,7 +140,7 @@ def get_settings():
 @BLUEPRINT.route("/user", methods=["POST"])
 def post_settings():
     if request.form["action"] == "add":
-        ttl_spec = request.form.get("ttl")
+        ttl_spec = request.form.get("ttl", "")
         if ttl_spec == "forever":
             ttl = None
         elif m := re.fullmatch(r"(\d+)d", ttl_spec):
@@ -141,7 +149,9 @@ def post_settings():
             flash("Bad request", category="error")
             return render_template("user.html.j2"), 400
 
-        ctx.db.create_key(ctx.sid, ttl, request.form.get("name"))
+        ctx.db.create_key(
+            uid=ctx.uid, ttl=ttl, name=request.form.get("name", "anonymous")
+        )
         flash("Key created", category="success")
 
     elif request.form["action"] == "revoke":
diff --git a/projects/tentacles/src/python/tentacles/store.py b/projects/tentacles/src/python/tentacles/db.py
similarity index 81%
rename from projects/tentacles/src/python/tentacles/store.py
rename to projects/tentacles/src/python/tentacles/db.py
index 4b92b11..dbbdbc7 100644
--- a/projects/tentacles/src/python/tentacles/store.py
+++ b/projects/tentacles/src/python/tentacles/db.py
@@ -8,6 +8,7 @@ from importlib.resources import files
 from inspect import signature
 import logging
 import sqlite3
+from time import sleep
 from types import GeneratorType, new_class
 from typing import Optional
 
@@ -27,7 +28,7 @@ def qfn(name, f):
         # Force lazy values for convenience
         if isinstance(res, GeneratorType):
             res = list(res)
-        print("%s -> %r" % (name, res))
+        log.log(logging.DEBUG - 1, "%s (%r) -> %r", name, kwargs, res)
         return res
 
     _helper.__name__ = f.__name__
@@ -64,7 +65,7 @@ class LoginError(StoreError):
     pass
 
 
-class Store(Queries):
+class Db(Queries):
     def __init__(self, path):
         self._path = path
         self._conn: sqlite3.Connection = None
@@ -106,9 +107,24 @@ class Store(Queries):
             try:
                 self.begin()
                 yield self
-                self.commit()
+                exc = None
+                for attempt in range(5):
+                    try:
+                        self.commit()
+                        break
+                    except sqlite3.OperationalError as e:
+                        exc = e
+                        if e.sqlite_errorcode == 6:
+                            sleep(0.1 * attempt)
+                            continue
+                        else:
+                            raise e
+                else:
+                    raise exc
+
             except sqlite3.Error:
                 self.rollback()
+                log.exception("Forced to roll back!")
 
         return _helper()
 
@@ -122,9 +138,11 @@ class Store(Queries):
     ################################################################################
     # Wrappers for doing Python type mapping
 
-    def create_key(self, *, uid: int, name: str, ttl: timedelta):
+    def create_key(self, *, uid: int, name: str, ttl: Optional[timedelta]):
         return super().create_key(
-            uid=uid, name=name, expiration=(datetime.now() + ttl).isoformat()
+            uid=uid,
+            name=name,
+            expiration=((datetime.now() + ttl).isoformat() if ttl else None),
         )
 
     def try_login(
@@ -171,3 +189,6 @@ class Store(Queries):
         """
 
         super().refresh_key(kid=kid, expiration=(datetime.now() + ttl).isoformat())
+
+    def finish_job(self, *, jid: int, state: str, message: Optional[str] = None):
+        super().finish_job(jid=jid, state=state, message=message)
diff --git a/projects/tentacles/src/python/tentacles/globals.py b/projects/tentacles/src/python/tentacles/globals.py
index 5470d7c..80c2c3c 100644
--- a/projects/tentacles/src/python/tentacles/globals.py
+++ b/projects/tentacles/src/python/tentacles/globals.py
@@ -3,13 +3,13 @@
 from contextvars import ContextVar
 
 from attrs import define
-from tentacles.store import Store
+from tentacles.db import Db
 from werkzeug.local import LocalProxy
 
 
 @define
 class Ctx:
-    db: Store
+    db: Db
     uid: int = None
     gid: int = None
     sid: str = None
diff --git a/projects/tentacles/src/python/tentacles/schema.sql b/projects/tentacles/src/python/tentacles/schema.sql
index 84cffef..373aaa3 100644
--- a/projects/tentacles/src/python/tentacles/schema.sql
+++ b/projects/tentacles/src/python/tentacles/schema.sql
@@ -93,7 +93,6 @@ CREATE TABLE IF NOT EXISTS jobs (
    id INTEGER PRIMARY KEY AUTOINCREMENT
  , user_id INTEGER NOT NULL
  , file_id INTEGER NOT NULL
- , priority INTEGER CHECK(priority IS NOT NULL AND 0 <= priority)
  , started_at TEXT
  , cancelled_at TEXT
  , finished_at TEXT
@@ -198,7 +197,8 @@ INSERT INTO user_keys (
 )
 VALUES (:uid, :name, :expiration)
 RETURNING
-  id
+   id
+ , user_id
 ;
 
 -- name: try-login^
@@ -232,7 +232,8 @@ WHERE
 
 -- name: try-key^
 SELECT
-   user_id
+   id
+ , user_id
 FROM user_keys
 WHERE
    (expiration IS NULL OR unixepoch(expiration) > unixepoch('now'))
@@ -265,7 +266,7 @@ INSERT INTO printers (
  , api_key
  , status_id
 )
-VALUES (:name, :url, :api_key, :status_id)
+VALUES (:name, :url, :api_key, :sid)
 RETURNING
    id
 ;
@@ -310,10 +311,10 @@ WHERE
 -- name: update-printer-status!
 UPDATE printers
 SET
-   status_id = (SELECT id FROM printer_statuses WHERE name = :status)
+   status_id = (SELECT id FROM printer_statuses WHERE name = :status or id = :status)
  , last_poll_date = datetime('now')
 WHERE
-   id = :uid
+   id = :pid
 ;
 
 ----------------------------------------------------------------------------------------------------
@@ -364,16 +365,10 @@ WHERE
 INSERT INTO jobs (
    user_id
  , file_id
- , priority
 )
 VALUES (
    :uid
- , :fid,
- , (
-     SELECT priority + :priority
-     FROM users
-     WHERE uid = :uid
-    )
+ , :fid
 )
 RETURNING
    id
@@ -384,7 +379,7 @@ SELECT
 FROM jobs
 WHERE
    user_id = :uid
-   AND id = :fid
+   AND id = :jid
 ;
 
 -- name: list-jobs
@@ -401,6 +396,7 @@ SELECT
 FROM jobs
 WHERE
    file_id = :fid
+ , uid = :uid
 ;
 
 -- name: list-job-queue
@@ -410,11 +406,9 @@ FROM jobs
 WHERE
    finished_at IS NULL
    AND (:uid IS NULL OR user_id = :uid)
-ORDER BY
-   priority DESC
 ;
 
--- name: poll-job-queue
+-- name: poll-job-queue^
 SELECT
    *
 FROM jobs
@@ -422,8 +416,6 @@ WHERE
    started_at IS NULL
    AND finished_at IS NULL
    AND printer_id IS NULL
-ORDER BY
-   priority DESC
 LIMIT 1
 ;
 
diff --git a/projects/tentacles/src/python/tentacles/templates/macros.html.j2 b/projects/tentacles/src/python/tentacles/templates/macros.html.j2
index 7e76d8f..0b6794a 100644
--- a/projects/tentacles/src/python/tentacles/templates/macros.html.j2
+++ b/projects/tentacles/src/python/tentacles/templates/macros.html.j2
@@ -35,7 +35,7 @@
 {% macro job_state(job) %}
 {{ 'queued' if (not job.finished_at and not job.printer_id and not job.cancelled_at) else
    'running' if (not job.finished_at and job.printer_id and not job.cancelled_at) else
-   'cancelling' if (not job.finished_at and job.printer_id and job.cancelled_at) else
+   'cancelling' if (not job.finished_at and job.cancelled_at) else
   job.state }}
 {% endmacro %}
 
diff --git a/projects/tentacles/src/python/tentacles/workers.py b/projects/tentacles/src/python/tentacles/workers.py
index 6dafcdd..cdf0da4 100644
--- a/projects/tentacles/src/python/tentacles/workers.py
+++ b/projects/tentacles/src/python/tentacles/workers.py
@@ -8,11 +8,10 @@ Mostly related to monitoring and managing Printer state.
 """
 
 from contextlib import closing
-from datetime import datetime, timedelta
 import logging
 from pathlib import Path
 from threading import Event
-from time import sleep
+from typing import Callable
 from urllib import parse as urlparse
 
 from cherrypy.process.plugins import Monitor
@@ -25,7 +24,7 @@ from requests.exceptions import (
     HTTPError,
     Timeout,
 )
-from tentacles.store import Store
+from tentacles.db import Db
 
 
 class OctoRest(_OR):
@@ -46,36 +45,16 @@ log = logging.getLogger(__name__)
 SHUTDOWN = Event()
 
 
-def corn_job(every: timedelta):
-    def _decorator(f):
-        def _helper(*args, **kwargs):
-            last = None
-            while not SHUTDOWN.is_set():
-                if not last or (datetime.now() - last) > every:
-                    log.debug(f"Ticking job {f.__name__}")
-                    try:
-                        last = datetime.now()
-                        f(*args, **kwargs)
-                    except Exception:
-                        log.exception(f"Error while procesing task {f.__name__}")
-                else:
-                    sleep(1)
-
-        return _helper
-
-    return _decorator
-
-
-def poll_printers(app: App, store: Store) -> None:
+def poll_printers(app: App, db: Db) -> None:
     """Poll printers for their status."""
 
-    for printer in store.list_printers():
-        mapped_job = store.fetch_job_by_printer(printer.id)
+    for printer in db.list_printers():
+        mapped_job = db.fetch_job_by_printer(pid=printer.id)
 
         def _set_status(status: str):
             if printer.status != status:
-                print(f"Printer {printer.id} {printer.status} -> {status}")
-                store.update_printer_status(printer.id, status)
+                log.info(f"Printer {printer.id} {printer.status} -> {status}")
+            db.update_printer_status(pid=printer.id, status=status)
 
         try:
             client = OctoRest(url=printer.url, apikey=printer.api_key)
@@ -91,7 +70,7 @@ def poll_printers(app: App, store: Store) -> None:
                 # polling tasks. This violates separation of concerns a bit,
                 # but appears required for correctness.
                 if mapped_job:
-                    store.finish_job(mapped_job.id, "error")
+                    db.finish_job(jid=mapped_job.id, state="error")
 
                 _set_status("error")
 
@@ -129,24 +108,24 @@ def poll_printers(app: App, store: Store) -> None:
                 )
 
 
-def assign_jobs(app: App, store: Store) -> None:
+def assign_jobs(app: App, db: Db) -> None:
     """Assign jobs to printers. Uploading files and job state management is handled separately."""
 
-    for printer_id in store.list_idle_printers():
-        if job_id := store.poll_job_queue():
-            store.assign_job(job_id, printer_id)
-            print(f"Mapped job {job_id} to printer {printer_id}")
+    for printer in db.list_idle_printers():
+        if job := db.poll_job_queue():
+            db.assign_job(jid=job.id, pid=printer.id)
+            log.info(f"Mapped job {job.id} to printer {printer.id}")
 
 
-def push_jobs(app: App, store: Store) -> None:
+def push_jobs(app: App, db: Db) -> None:
     """Ensure that job files are uploaded and started to the assigned printer."""
 
-    for job in store.list_mapped_jobs():
-        printer = store.fetch_printer(job.printer_id)
-        file = store.fetch_file(job.user_id, job.file_id)
+    for job in db.list_mapped_jobs():
+        printer = db.fetch_printer(pid=job.printer_id)
+        file = db.fetch_file(uid=job.user_id, fid=job.file_id)
         if not file:
             log.error(f"Job {job.id} no longer maps to a file")
-            store.delete_job(job.user_id, job.id)
+            db.delete_job(job.user_id, job.id)
 
         try:
             client = OctoRest(url=printer.url, apikey=printer.api_key)
@@ -157,11 +136,15 @@ def push_jobs(app: App, store: Store) -> None:
                 printer_state = {"error": printer_job.get("error")}
 
             if printer_state.get("error"):
-                print(f"Printer {printer.id} is in error, can't push")
+                log.warn(f"Printer {printer.id} is in error, can't push")
                 continue
 
             try:
-                client.upload(file.path)
+                if not client.files_info("local", Path(file.path).name):
+                    client.upload(file.path)
+                else:
+                    log.info("Don't need to upload the job!")
+
             except HTTPError as e:
                 if e.response.status_code == 409:
                     pass
@@ -170,7 +153,7 @@ def push_jobs(app: App, store: Store) -> None:
 
             client.select(Path(file.path).name)
             client.start()
-            store.start_job(job.id)
+            db.start_job(job.id)
         except TimeoutError:
             pass
 
@@ -178,19 +161,19 @@ def push_jobs(app: App, store: Store) -> None:
             log.exception("Oop")
 
 
-def revoke_jobs(app: App, store: Store) -> None:
+def revoke_jobs(app: App, db: Db) -> None:
     """Ensure that job files are uploaded and started to the assigned printer.
 
     Note that this will ALSO cancel jobs out of the print queue.
 
     """
 
-    for job in store.list_cancelled_jobs():
+    for job in db.list_canceling_jobs():
         if job.printer_id:
-            printer = store.fetch_printer(job.printer_id)
+            printer = db.fetch_printer(pid=job.printer_id)
 
             try:
-                print(f"Cancelling running job {job.id}")
+                log.info(f"Cancelling running job {job.id}")
                 client = OctoRest(url=printer.url, apikey=printer.api_key)
                 try:
                     client.cancel()
@@ -200,8 +183,8 @@ def revoke_jobs(app: App, store: Store) -> None:
                     else:
                         raise
 
-                print(f"Job {job.id} -> cancelled")
-                store.finish_job(job.id, "cancelled")
+                log.info(f"Job {job.id} -> cancelled")
+                db.finish_job(jid=job.id, state="cancelled")
 
             except TimeoutError:
                 pass
@@ -210,15 +193,15 @@ def revoke_jobs(app: App, store: Store) -> None:
                 log.exception("Oop")
 
         else:
-            print(f"Unmapped job {job.id} became cancelled")
-            store.finish_job(job.id, "cancelled")
+            log.info(f"Unmapped job {job.id} became cancelled")
+            db.finish_job(jid=job.id, state="cancelled")
 
 
-def pull_jobs(app: App, store: Store) -> None:
+def pull_jobs(app: App, db: Db) -> None:
     """Poll the state of mapped printers to control jobs."""
 
-    for job in store.list_running_jobs():
-        printer = store.fetch_printer(job.printer_id)
+    for job in db.list_running_jobs():
+        printer = db.fetch_printer(pid=job.printer_id)
         try:
             client = OctoRest(url=printer.url, apikey=printer.api_key)
             job_state = client.job_info()
@@ -231,19 +214,19 @@ def pull_jobs(app: App, store: Store) -> None:
                 pass
 
             elif job_state.get("progress", {}).get("completion", 0.0) == 100.0:
-                print(f"Job {job.id} has succeeded")
-                store.finish_job(job.id, "success")
+                log.info(f"Job {job.id} has succeeded")
+                db.finish_job(jid=job.id, state="success")
 
             elif printer_state.get("error"):
-                print(f"Job {job.id} has failed")
-                store.finish_job(job.id, "failed")
+                log.warn(f"Job {job.id} has failed")
+                db.finish_job(jid=job.id, state="failed")
 
             elif printer_state.get("cancelling"):
-                print(f"Job {job.id} has been acknowledged as cancelled")
-                store.finish_job(job.id, "cancelled")
+                log.info(f"Job {job.id} has been acknowledged as cancelled")
+                db.finish_job(jid=job.id, state="cancelled")
 
             else:
-                print(
+                log.warn(
                     f"Job {job.id} is in a weird state {job_state.get('progress')!r} {printer_state!r}"
                 )
 
@@ -254,35 +237,60 @@ def pull_jobs(app: App, store: Store) -> None:
             log.exception("Oop")
 
 
-def send_emails(app, store: Store):
+def send_emails(app, db: Db):
     with closing(
         FastMailSMTP(
             app.config.get("fastmail", {}).get("username"),
             app.config.get("fastmail", {}).get("key"),
         )
     ) as fm:
-        for message in store.poll_spool():
+        for message in db.poll_email_queue():
             fm.send_message(
                 from_addr="root@tirefireind.us",
                 to_addrs=[message.to],
                 subject=message.subject,
                 msg=message.body,
             )
-            store.send_email(message.id)
+            db.send_email(message.id)
+
+
+def once(f):
+    val = uninitialized = object()
+
+    def _helper(*args, **kwargs):
+        nonlocal val
+        if val is uninitialized:
+            val = f(*args, **kwargs)
+        return val
+
+    return _helper
+
+
+def toil(*fs):
+    def _helper(*args, **kwargs):
+        for f in fs:
+            f(*args, **kwargs)
+
+    _helper.__name__ = "toil"
+    return _helper
 
 
 class Worker(Monitor):
-    def __init__(self, bus, app, db_factory, **kwargs):
+    def __init__(
+        self,
+        bus,
+        app: App,
+        db_factory: Callable[[App], Db],
+        callback: Callable[[App, Db], None],
+        **kwargs,
+    ):
         self._app = app
         self._db_factory = db_factory
-        super().__init__(bus, self.callback, **kwargs)
+        self._callback = callback
+        super().__init__(
+            bus, self.callback, **kwargs, name=f"Async {callback.__name__}"
+        )
 
     def callback(self):
-        log.debug("Tick")
-        with self._app.app_context(), closing(self._db_factory(self._app)) as store:
-            poll_printers(self._app, store)
-            assign_jobs(self._app, store)
-            push_jobs(self._app, store)
-            revoke_jobs(self._app, store)
-            pull_jobs(self._app, store)
-            send_emails(self._app, store)
+        with closing(self._db_factory(self._app)) as db:
+            self._callback(self._app, db)
diff --git a/projects/tentacles/test/python/conftest.py b/projects/tentacles/test/python/conftest.py
index 551f1c3..a44ce2a 100644
--- a/projects/tentacles/test/python/conftest.py
+++ b/projects/tentacles/test/python/conftest.py
@@ -3,12 +3,12 @@
 from datetime import timedelta
 
 import pytest
-import tentacles.store as s
+from tentacles.db import Db
 
 
 @pytest.yield_fixture
-def store():
-    conn = s.Store(":memory:")
+def db():
+    conn = Db(":memory:")
     conn.connect()
     yield conn
     conn.close()
@@ -25,9 +25,9 @@ def password_testy():
 
 
 @pytest.fixture
-def uid_testy(store: s.Store, username_testy, password_testy):
-    with store.savepoint():
-        return store.try_create_user(
+def uid_testy(db: Db, username_testy, password_testy):
+    with db.savepoint():
+        return db.try_create_user(
             username=username_testy,
             email=username_testy,
             password=password_testy,
@@ -41,8 +41,10 @@ def login_ttl():
 
 
 @pytest.fixture
-def sid_testy(store, uid_testy, username_testy, password_testy, login_ttl):
-    with store.savepoint():
-        return store.try_login(
+def sid_testy(db: Db, uid_testy, username_testy, password_testy, login_ttl):
+    with db.savepoint():
+        res = db.try_login(
             username=username_testy, password=password_testy, ttl=login_ttl
-        ).id
+        )
+        assert res.user_id == uid_testy
+        return res.id
diff --git a/projects/tentacles/test/python/test_store.py b/projects/tentacles/test/python/test_store.py
index 8702d81..3493188 100644
--- a/projects/tentacles/test/python/test_store.py
+++ b/projects/tentacles/test/python/test_store.py
@@ -1,13 +1,13 @@
 #!/usr/bin/env python3
 
-from tentacles.store import Store
+from tentacles.db import Db
 
 
-def test_store_initializes(store: Store):
-    assert isinstance(store, Store)
+def test_db_initializes(store: Db):
+    assert isinstance(store, Db)
 
 
-def test_store_savepoint(store: Store):
+def test_db_savepoint(store: Db):
     obj = store.savepoint()
 
     assert hasattr(obj, "__enter__")