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handlers/replication.py in commit #778.


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directory. Replicator's handler is moved into handlers/replication.py. 
Clean some imports.


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- Split completely expected packet handlers from asynchronous event handlers
- Remove NEOStorageConnectionFailure exception and replace it by a more general "ConnectionClosed" exception, purely internal to client app.
- Modify waitMessage to redirect to a handler based on remote peer type
- Fix multiple code paths taken when master doesn't accept connections (or closes them) while trying to conenct to it.
Also:
- remove unused imports found by pyflakes


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Add lock/release around each "close" call in client which wasn't already locked.


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- generic base handler
- client connection handlers
- master connection handlers


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Update users.


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For now, it's a no-op for any non-storage node.


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Make ask, notify and answer raise ConnectorConnectionClosedException when called on a closed connection.


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more usefull. Storage clear its partition table before asking it, this prevent
duplicate entries but should not be required.


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handled by the identification handler which apply the right handler depending on
the peer node type. Client and storage incoming connections are refused until
the storage reach the operation state, but the listening port is open to ensure
it's available, tryAgain errors are sent to wrong nodes.
Remove decorators because connection type is implied by handler type.


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Update callers.


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Only close master_conn is it is set.
Add an assertion before closing to verify that if there is any master connection closed after primary master is set is the primary master connection itself.


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during bootstrap stage.


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Don't restart a complete connection to primary master when requestNodeIdentification fails (for example if master is not ready).


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