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From this moment on, we embed a fork of u1db called l2db.
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Pep8 was warning about assignment of lambdas. These lambdas should
be partials
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All batching code has no effect by default with this commit. Since we
know that this is a dangerous new feature we will enable them only on
our test servers and check them manually before setting it as default
or adding more configuration features.
Use SyncTarget and server conf file to enable it for testing.
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Batch support is optional. This commit adds a 'batching' configuration
option to disable it.
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Using _bulk_docs api from CouchDB we can put all docs at a single
request. Also, prefetching all ids removes the need to HEAD
requests during the batch.
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Created two methods on the backend to start and finish a batch. A dict of
callbacks is available to defer actions for the last document, allowing
temporary (changing often) metadata to be recorded only once.
Using those methods we will also be able to put all docs in one go on
the CouchDatabase implementation, but that is another step.
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This info can be changed by another syncing replica and would not
reflect real database generation. That would be ok inside of the same
sync, but can cause trouble on concurrent syncs.
The other calls are ok, since they hold info that doesnt change during
concurrent syncs or are only read/write by the replica syncing. A global
cache could fit better this removed case, but for now let's stay on the
safe side.
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When retrieving other replica info the cache wasnt being used, but when
saving it was. This commit applies caching on get as well.
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errors.py was holding a few specific CouchDB errors, now moved into
couch.errors module. Also, some of CouchDatabase methods were declared
as private, but external classes needs them.
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As SoledadBackend is intended to be database agnostic, a new generic
document is now used instead of the old one made for CouchDB. The only
attribute that really relates to couch was couch_rev, removed on this
commit as it can be set on CouchDatabase implementation when needed.
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First step of splitting classes across files on common.
backend.py holds SoledadBackend (generic backend logic)
couch/ is now a directory with old code inside __init__.py and
CouchServerState on state.py
Also removed mock IndexedSoledadBackend, since Soledad does not support
indexing due to encryption on server side.
Also fixed DesignDocUnknownError to show up what is the message of the
original exception. It was being lost.
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