by virtue of being reachable from objects in databases, there is
a danger of ambiguity when an object is reachable from multiple
databases.  This ambiguity can lead to very subtle bugs with the
symtom that objects are in unexpected databases.

Introduced a check to refuse to commit when the ambiguity exists.

(This required changing the connection '_creating' attribute to a
dictionary.)

Secondary connections always need to be made from an existing
connection.

Added check to make sure we don't get references across incompatible
connections.

pass optional open arguments to secondary databases.

savepoint.

Forward port from 2.7 branch.

UndoSearch._readnext():  Add the transaction size to the return value.

the function was moved to serialize.py; this caused
a Zope3 test to fail.

Use a sane zdaemon tag.

- Added an "extended" reference format in preparation for adding
  cross-database references.

- Simplified referencesf and get_refs, added doc strings, and moved
  get_refs to be with the other serialization code.

Documented and slightly changed the api for get_refs.  Updated
  client code accordingly.

- Added an "extended" reference format in preparation for adding
  cross-database references.

- Simplified referencesf and get_refs, added doc strings, and moved
  get_refs to be with the other serialization code.

Documented and slightly changed the api for get_refs.  Updated
  client code accordingly.

be consistent with the code in serialize.py. (It currently isn't.)

database format. In particular, data records should always have two
pickles.

checkCrossDBInvalidations():  This is too clever.  Stick a
sync() call back in to make it clearer.

checkCrossDBInvalidations:  make this willing to wait longer in all,
and increase the sleep time per failing loop iteration.  The hope is
this will allow the test to pass on slower and/or "too busy" machines.
I can't test that, though, since I couldn't get the test to fail at
all on a Windows or a Linux box.

Point at correct zdaemon tag.

Revert rev 30607 -- Zope trunk actually does still use ZODB's _Persistence.c,
although ZODB doesn't.

Port from ZODB 3.2.

referencesf():  Use %r instead of %s format in the error message, else
the pickle shown is full of unprintable characters.

Remove unused code; Zope 2.8 already has its own copy.

Use a zdaemon tag.

Prepare to stitch in zdaemon from a tag.

Use the same Zope3 tag as Zope 2.8.

Connection (and IDataManager) grows a public .transaction_manager
attribute.

The related txn_mgr spelling of various method arguments is
now deprecated, and a "transaction_manager" spelling is added.

Change test.py to use zope.testing.testrunner, and update the
latter to Jim's development version.  Hardest part turned out
to be teaching ZODB's setup.py how to "build" this version of
zope.testing (it has a lot of packages in a test directory,
where the latter is not itself a package).

Incidentally repaired an oversight in building zope.interface
too.

Missed a socket address change.

Use ZConfig's new socket address types appropriately.

These config file keys changed:

section    key              was             is
-------    ---------------  --------------  -------------------------
zeo        address          socket-address  socket-binding-address
zeo        monitor-address  socket-address  socket-binding-address
zeoclient  server           socket-address  socket-connection-address

Stitch in ZConfig as an SVN external.
Use the same tag Zope trunk (2.8) is using.

This is probably hosed for a bit, since it's trying to delete and
re-insert ZConfig at the same time.

Collector 1788:  runzeo fails in 2.8

A patch from Mark Hammond to repair a new Windows-specific
gimmick in ZEOServer.setup_win32_signals().

ZODB grows its own zodb3.map.

checkUndoInVersion():  Add an optional `hook` argument.

This gets called "in the middle" of the test, if specified.
ZRS 1.5 uses this to pass a callback that arranges to start a
ZRS secondary then.  ZRS had its own copy of this test, but
it's a miserable & messy test, and the copy it had failed in
5 different places when using ZODB 3.4 (it had gotten way of
synch with changes since ZODB 3.2).

Also removed all traces of the bizarre _x_dostore() method.
Not sure what that was about, but if the comments were right
we don't care about ZEO 1.0 anymore.

ZEO/tests/zeoserver.py, log():  repair broken interface
between old logging code and the use of Python's logging
package.

ZODB/tests/TransactionalUndoStorage.py, _exercise_info_indices():
Jeez Louise, the new tests I added for undoInfo+undoLog work fine
in ZODB, but break the ZRS tests(!).  They close the DB "too soon",
and in one of the ZRS scenarios that leaves a recovering secondary
without a primary to recover from.