- All incoming connections start with the identification handler which will
apply the right handler depending on the current cluster state and the node
type. So we are now sure that a node is well identified, got an UUID and is
registered into the node manager when it leaves the identification handler.
- During service, clietnt and storage nodes have their own handler


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exception during packet decoding or processing.


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one storage node.


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the current cluster state, so the primary master should not change the admin's 
connection handler when doing a state-switch.
Factorise a little the response to an identification request.


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- first, asks which master is the primary
- then, when connected to the primary, request node identification
- then, ask explicitely for partition table and node information, to follow query/answer schema.
Details:
- Master:
 - Move handleAskPrimaryMaster, handleAskNodeInformation and handleAskPartitionTable implementations to base handler to factorise code
 - handleRequestNodeIdentification is not required any more in secondary mode, only handleAskPrimaryMaster
- Client:
 - Make bootstrap handler and master connection behave more similarly to on storage's equivalents
 - Remove PrimaryHandler (moved into PrimaryNotificationsHandler)
 - parse master node configured ip list just once, and register them to node manager just once (in app's __init__)


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- wait for all transaction to finish
- ask all other nodes to shut down if cluster is shutting down


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ignored if we are stopping all storage and master nodes


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thus don't need to be imported.


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table ID.


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since the 'name' handler parameter is not positional-fixed nor a keyword
argument.


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information message to admin node


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partition table


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functions. Factorise check of enum based values and string decoding. 
Unify tuple unpacking by always using parenthesis.


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mistake. Add an helper method on the event manager to retreive a connection from
an UUID.


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ERROR since we don't want any useless packets.


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- Add handler method
- Fix encoding and decoding
- Add cluster state enumeration
Fix exception handling in newer packet decoders (no more except *: )


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scratch.


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- refuse any new connection
- refuse any new transaction



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current partition table ID. The next partition table ID is now computed by the
master's PartitionTable instance.


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to RUNNING state when requested by the admin node. This feature can be disabled
by setting neo.master.ENABLE_PENDING_NODES to False.
The neoctl syntax is : neoctl add (all | UUID+) 
and display UUIDs of added storage nodes.


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Tiny inner loop optimisation on list append.
Remvoe unneeded (obvious) comments.


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Get connection from the cell (loop variant) rather from the node (loop invariant, remain from a loop higher in the same method).


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Use an intermediate set() to remove duplicate tids (as we request data from all storage nodes, the same tid wille be reported one time per node replicating it).


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