Release 2.1.0

Please check out our release notes for version 2.1.0.

New APIs have been added: one for listing the subscriptions of a subscriber and another for showing the configurations of the push service providers for services that exist.

Concurrency issues in ADM and APNS have been fixed. The APNS implementation has been changed to use a new, reliable worker pool implementation.

This implementation has been running reliably at production scale, at a company named if(we), sending push notifications for the Tagged and hi5 social networks for a while now (nearly a year at time of writing). The company has 12 processes handling a peak of 60 APNS push notifications per second, and the tier is overprovisioned in order to be able to deal with traffic increases and potential surges. That's about 5 APNS push notifications per process per second. In addition, if(we) sends about 270 GCM push notifications per second distributed amongst these same processes, which adds about another 22 GCM push notifications per second each process sends. The subscribe API on the tier ends up getting hit about 500 times per second (about 42 queries per process per second). So, each process is handling about 70 queries a second easily. if(we) has been running without any issues for many months, especially after fixing some bugs that eventually manifested only at their scale.

A bug which could lead to infinite loops in rare circumstances has been fixed.

The APNS implementation no longer uses Go's default HTML escaping of JSON payloads. The APNS servers now render payloads with characters such as '"' properly.

More details have been added to error messages so that problems can be debugged more easily.

The APNS implementation has also been updated to deal with 100-byte APNS device tokens (previously 32-bytes) which Apple said it would roll out in 2016.