fixes https://github.com/TryGhost/Team/issues/2522
When sending an email for multiple batches at the same time, we now
reuse the same email body for each batch in the same segment. This
reduces the amount of database queries and makes the sending more
reliable in case of database failures.
The cache is short lived. After sending the email it is automatically
garbage collected.
fixes https://github.com/TryGhost/Team/issues/2512
The email sending is a crucial flow that should not be interrupted. If
there are database connection issues, we should try to recover from them
automatically by retrying individual database queries and transactions
for a limited amount of time.
This adds a helper method to retry database operations. It limits all
database queries before sending the actual email to maximum 10 minutes.
Database operations that happen after sending have a higher retry time
because they are more crucial to prevent data loss (e.g. saving that an
email was sent).
refs https://github.com/TryGhost/Team/issues/2482
This change adds a small sleep in between dispatching events in the
worker thread that reads the events from Mailgun. That should reduce the
amount of queries we fire parallel to each other and could cause the
connection pool to run out of connections.
It also reduces the amount of concurrent sending to 2 from 10. Also to
make sure the connection pool doesn't run out of connections while
sending emails, and to reduce the chance of new connections falling back
on a (delayed) replicated database.
fixes https://github.com/TryGhost/Team/issues/2366
refs https://ghost.slack.com/archives/C02G9E68C/p1670232405014209
Probem described in issue.
In the old MEGA flow:
- The `email_verification_required` check is now repeated inside the job
In the new email service flow:
- The `email_verification_required` is now checked (didn't happen
before)
- When generating the email batch recipients, we only include members
that were created before the email was created. That way it is
impossible to avoid limit checks by inserting new members between
creating an email and sending an email.
- We don't need to repeat the check inside the job because of the above
changes
Improved handling of large imports:
- When checking `email_verification_required`, we now also check if the
import threshold is reached (a new method is introduced in
vertificationTrigger specifically for this usage). If it is, we start
the verification progress. This is required for long running imports
that only check the verification threshold at the very end.
- This change increases the concurrency of fastq to 3 (refs
https://ghost.slack.com/archives/C02G9E68C/p1670232405014209). So when
running a long import, it is now possible to send emails without having
to wait for the import. Above change makes sure it is not possible to
get around the verification limits.
Refactoring:
- Removed the need to use `updateVerificationTrigger` by making
thresholds getters instead of fixed variables.
- Improved awaiting of members import job in regression test
refs https://github.com/TryGhost/Team/issues/2339
- Includes a new pattern in the job manager that allows us to properly
await jobs.
- Added new convenience mocking methods to stub settings
- Tests the main flows for bulk sending:
- Sending in multiple batches
- Sending to multiple segments
- Handling a failed batch and retrying that batch
- Fixes bug in batch generation (ordering not working)
In a different PR I'll add more detailed tests.
closes https://github.com/TryGhost/Team/issues/2309
- adds new mailgun provider to send out batch emails
- updates sending service to send email id for mailgun provider, allows tagging mail with email id
fixes https://github.com/TryGhost/Team/issues/2308
- Still has some missing pieces, but mostly works.
- Uses new handlebars template for emails
- When sending emails with the new email stability flag enabled, one
test email is now sent via the default smtp ghost mailer.
fixes https://github.com/TryGhost/Team/issues/2284
New batch sending flow (still WIP). Logs the sent emails instead of actually sending them. Unit tests are coming in later commits.
