Retrying a failed replication after initial connection failure?

[Johan Bäversjö]

Hi

The PouchDB api has a {retry: true} setting for its db.sync() method. This works well when the replicator loses its connection in the middle of a session, however if no connection can be established initially when db.sync() is called, the replicator won't try to connect when the server is available again. I'm trying to handle the case where the web page is loaded offline, but goes online later, and should start syncing.

I worked around this by manually retrying the db.sync() if the replication was never started. This works except I get a memory warning from Pouch saying I've attached too many event handlers after ~10 retries. I tried resolving this by calling .cancel() on the object returned by db.sync() before retrying, however the .cancel() method is not available if the initial connection fails.

Any ideas on how to properly retry initial replication connections, or how to clean up the callbacks attached by (presumably) the db object by pouch?
Also, what's the best way for telling when a replication is active? It seems that, if there's no data to replicate. I have a solution that works in practice; if either "active" or "paused" is thrown, the replicator was connected. This is for an android wrapper app so webkit only solutions are fine.

Thanks for a great product!

Johan Baversjo

[Dale Harvey]

Its a bug that retry doesnt work if the connection isnt active when you start, its one that I thought someone reported and we have fixed, but not seeing it in the logs now, are you trying the latest version?

Either way have filed here https://github.com/pouchdb/pouchdb/issues/4049

As for checking for activity, you are right, `active` should fire while data is replicating, `paused` will fire when it is not (ie waiting for updates or a connection

Cheers

Dale

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[Johan Bäversjö]

Hi Dale,

Thanks for filing that issue! Makes sense, I'll remove my internal retry logic then.

I'm using 3.6.0.

Cheers

Johan