gossip::server::GossipSlot Class Reference

Memory map with different slots and versions. More...

#include <GossipSlot.h>

Public Member Functions
	GossipSlot (std::string name)
	GossipSlot (const GossipSlot &other)
GossipSlot &	operator= (const GossipSlot &other)
SlotVersion	insertOrUpdate (const std::string &key, const std::string &value)
SlotVersion	insertOrUpdate (const std::string &key, const std::string &value, SlotVersion version)
SlotVersion	remove (const std::string &key)
SlotVersion	remove (const std::string &key, SlotVersion version)
SlotVersion	version () const
std::string	name () const
SlotVersion	compareAndMergeSlot (SlotValues values, SlotVersion version)
std::pair< std::string, SlotVersion >	find (const std::string &key)
SlotValues	messages () const
size_t	approximateMemoryUse () const

Detailed Description

Memory map with different slots and versions.

Class GossipSlot stores all K-V pairs generated by certain GossipNode. A GossipSlot only stores data from that GossipNode.

Constructor & Destructor Documentation

GossipSlot()

gossip::server::GossipSlot::GossipSlot ( std::string  name )

inlineexplicit

Construction of GossipSlot, the name of a slot represents a node's name.

Parameters

name	Slot name of GossipSlot.

Member Function Documentation

approximateMemoryUse()

size_t gossip::server::GossipSlot::approximateMemoryUse ( ) const

inline

Get approximate memory use of this slot.

Returns

Approximate memory use

compareAndMergeSlot()

SlotVersion gossip::server::GossipSlot::compareAndMergeSlot	(	SlotValues	values,
		SlotVersion	version
	)

Merge this slot with given SlotValues, if assigned version is less than current version, function will do nothing.

Parameters

values	New values of this slot
version	Assigned version

Returns

Assigned slot version if succeed or -1 if failed

find()

std::pair< std::string, SlotVersion > gossip::server::GossipSlot::find

(

const std::string &

key

)

Get value and version of a K-V pair in this slot.

Parameters

key	The key of K-V pair

Returns

[value , version] if succeed or ["", 0] if not found

insertOrUpdate() [1/2]

SlotVersion gossip::server::GossipSlot::insertOrUpdate	(	const std::string &	key,
		const std::string &	value
	)

Insert or update a K-V pair and update version of slot automatically.

Parameters

key	The key of K-V pair
value	The value of K-V pair

Returns

Updated slot version

insertOrUpdate() [2/2]

SlotVersion gossip::server::GossipSlot::insertOrUpdate	(	const std::string &	key,
		const std::string &	value,
		SlotVersion	version
	)

Insert or update a K-V pair and set slot version to assigned value. If assigned version value is less than current version, the function will do nothing.

Parameters

key	The key of K-V pair
value	The value of K-V pair
version	Assigned slot version

Returns

Assigned slot version if succeed or -1 if failed

messages()

SlotValues gossip::server::GossipSlot::messages ( ) const

inline

Get the Copy of K-V pairs in this slot.

Returns

Copy of K-V pairs, struct format is std::unordered_map

name()

std::string gossip::server::GossipSlot::name ( ) const

inline

Get the name of this slot.

Returns

Slot name

remove() [1/2]

SlotVersion gossip::server::GossipSlot::remove

(

const std::string &

key

)

Delete a K-V pair in current slot.

Parameters

key	The key of K-V pair

Returns

Updated slot version if succeed or -1 if failed

remove() [2/2]

SlotVersion gossip::server::GossipSlot::remove	(	const std::string &	key,
		SlotVersion	version
	)

Delete a K-V pair in current slot and set slot version to assigned value.

Parameters

key	The key of K-V pair
version	Assigned slot version

Returns

Assigned slot version if succeed or -1 if failed

version()

SlotVersion gossip::server::GossipSlot::version ( ) const

inline

Get current version of this slot.

Returns

Current version

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The documentation for this class was generated from the following files:

• /Users/tangrenchu/CLionProjects/Gossip/server/GossipSlot.h
• /Users/tangrenchu/CLionProjects/Gossip/server/GossipSlot.cpp