# Which Problems Are Solved
The current handling of notification follows the same pattern as all
other projections:
Created events are handled sequentially (based on "position") by a
handler. During the process, a lot of information is aggregated (user,
texts, templates, ...).
This leads to back pressure on the projection since the handling of
events might take longer than the time before a new event (to be
handled) is created.
# How the Problems Are Solved
- The current user notification handler creates separate notification
events based on the user / session events.
- These events contain all the present and required information
including the userID.
- These notification events get processed by notification workers, which
gather the necessary information (recipient address, texts, templates)
to send out these notifications.
- If a notification fails, a retry event is created based on the current
notification request including the current state of the user (this
prevents race conditions, where a user is changed in the meantime and
the notification already gets the new state).
- The retry event will be handled after a backoff delay. This delay
increases with every attempt.
- If the configured amount of attempts is reached or the message expired
(based on config), a cancel event is created, letting the workers know,
the notification must no longer be handled.
- In case of successful send, a sent event is created for the
notification aggregate and the existing "sent" events for the user /
session object is stored.
- The following is added to the defaults.yaml to allow configuration of
the notification workers:
```yaml
Notifications:
# The amount of workers processing the notification request events.
# If set to 0, no notification request events will be handled. This can be useful when running in
# multi binary / pod setup and allowing only certain executables to process the events.
Workers: 1 # ZITADEL_NOTIFIACATIONS_WORKERS
# The amount of events a single worker will process in a run.
BulkLimit: 10 # ZITADEL_NOTIFIACATIONS_BULKLIMIT
# Time interval between scheduled notifications for request events
RequeueEvery: 2s # ZITADEL_NOTIFIACATIONS_REQUEUEEVERY
# The amount of workers processing the notification retry events.
# If set to 0, no notification retry events will be handled. This can be useful when running in
# multi binary / pod setup and allowing only certain executables to process the events.
RetryWorkers: 1 # ZITADEL_NOTIFIACATIONS_RETRYWORKERS
# Time interval between scheduled notifications for retry events
RetryRequeueEvery: 2s # ZITADEL_NOTIFIACATIONS_RETRYREQUEUEEVERY
# Only instances are projected, for which at least a projection-relevant event exists within the timeframe
# from HandleActiveInstances duration in the past until the projection's current time
# If set to 0 (default), every instance is always considered active
HandleActiveInstances: 0s # ZITADEL_NOTIFIACATIONS_HANDLEACTIVEINSTANCES
# The maximum duration a transaction remains open
# before it spots left folding additional events
# and updates the table.
TransactionDuration: 1m # ZITADEL_NOTIFIACATIONS_TRANSACTIONDURATION
# Automatically cancel the notification after the amount of failed attempts
MaxAttempts: 3 # ZITADEL_NOTIFIACATIONS_MAXATTEMPTS
# Automatically cancel the notification if it cannot be handled within a specific time
MaxTtl: 5m # ZITADEL_NOTIFIACATIONS_MAXTTL
# Failed attempts are retried after a confogired delay (with exponential backoff).
# Set a minimum and maximum delay and a factor for the backoff
MinRetryDelay: 1s # ZITADEL_NOTIFIACATIONS_MINRETRYDELAY
MaxRetryDelay: 20s # ZITADEL_NOTIFIACATIONS_MAXRETRYDELAY
# Any factor below 1 will be set to 1
RetryDelayFactor: 1.5 # ZITADEL_NOTIFIACATIONS_RETRYDELAYFACTOR
```
# Additional Changes
None
# Additional Context
- closes#8931
This fix provides a possibility to pass a domain on the session, which
will be used (as rpID) to create a passkey / u2f assertion and
attestation. This is useful in cases where the login UI is served under
a different domain / origin than the ZITADEL API.
* begin pw less registration
* create pwless one time codes
* send pwless link
* separate send and add passwordless link
* separate send and add passwordless link events
* custom message text for passwordless registration
* begin custom login texts for passwordless
* i18n
* i18n message
* i18n message
* custom message text
* custom login text
* org design and texts
* create link in human import process
* fix import human tests
* begin passwordless init required step
* passwordless init
* passwordless init
* do not return link in mgmt api
* prompt
* passwordless init only (no additional prompt)
* cleanup
* cleanup
* add passwordless prompt to custom login text
* increase init code complexity
* fix grpc
* cleanup
* fix and add some cases for nextStep tests
* fix tests
* Update internal/notification/static/i18n/en.yaml
* Update internal/notification/static/i18n/de.yaml
* Update proto/zitadel/management.proto
* Update internal/ui/login/static/i18n/de.yaml
* Update internal/ui/login/static/i18n/de.yaml
* Update internal/ui/login/static/i18n/de.yaml
Co-authored-by: Fabi <38692350+fgerschwiler@users.noreply.github.com>
