stdmap

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 Go to latest Published: Oct 6, 2020 License: AGPL-3.0 Imports: 13 Imported by: 7

Documentation

Overview

(c) 2019 Dapper Labs - ALL RIGHTS RESERVED

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func EjectFakeRandom 

func EjectFakeRandom(entities map[flow.Identifier]flow.Entity) (flow.Identifier, flow.Entity)

EjectFakeRandom relies on the random map iteration in Go to pick the entity we eject from the entity set. It picks the first entity upon iteration, thus being the fastest way to pick an entity to be evicted; at the same time, it conserves the random bias of the Go map iteration.

func EjectPanic 

func EjectPanic(entities map[flow.Identifier]flow.Entity) (flow.Identifier, flow.Entity)

EjectPanic simply panics, crashing the program. Useful when cache is not expected to grow beyond certain limits, but ejecting is not applicable

func EjectTrueRandom 

func EjectTrueRandom(entities map[flow.Identifier]flow.Entity) (flow.Identifier, flow.Entity)

EjectTrueRandom relies on a random generator to pick a random entity to eject from the entity set. It will, on average, iterate through half the entities of the set. However, it provides us with a truly evenly distributed random selection.

Types

type Approvals 

type Approvals struct {
	*Backend
	// contains filtered or unexported fields
}

Approvals implements the result approvals memory pool of the consensus nodes, used to store result approvals and to generate block seals. Approvals are indexed by chunk and approver to facilitate the chunk-matching algorithm. The underyling key value store is as follows:

[chunk_key] => ( [approver_id] => *ResultApproval )

where chunk_key is an identifier obtained by combining the approval's result ID and chunk index.

func NewApprovals 

func NewApprovals(limit uint) (*Approvals, error)

NewApprovals creates a new memory pool for result approvals.

func (*Approvals) Add 

func (a *Approvals) Add(approval *flow.ResultApproval) (bool, error)

Add adds an result approval to the mempool.

func (*Approvals) All 

func (a *Approvals) All() []*flow.ResultApproval

All will return all approvals in the memory pool.

func (*Approvals) ByChunk added in v0.9.6 

func (a *Approvals) ByChunk(resultID flow.Identifier, chunkIndex uint64) map[flow.Identifier]*flow.ResultApproval

Get fetches approvals for a specific chunk

func (*Approvals) Rem 

func (a *Approvals) Rem(resultID flow.Identifier, chunkIndex uint64) bool

Rem will remove all the approvals corresponding to the chunk.

func (*Approvals) Size added in v0.9.6 

func (a *Approvals) Size() uint

Size returns the number of approvals in the mempool.

type Assignments 

type Assignments struct {
	*Backend
}

Assignments implements the chunk assignment memory pool.

func NewAssignments 

func NewAssignments(limit uint) (*Assignments, error)

NewAssignments creates a new memory pool for Assignments.

func (*Assignments) Add 

func (a *Assignments) Add(fingerprint flow.Identifier, assignment *chunkmodels.Assignment) bool

Add adds an Assignment to the mempool.

func (*Assignments) All 

func (a *Assignments) All() []*chunkmodels.Assignment

All returns all chunk data packs from the pool.

func (*Assignments) ByID 

func (a *Assignments) ByID(assignmentID flow.Identifier) (*chunkmodels.Assignment, bool)

ByID retrieves the chunk assignment from mempool based on provided ID

func (*Assignments) Has 

func (a *Assignments) Has(assignmentID flow.Identifier) bool

Has checks whether the Assignment with the given hash is currently in the memory pool.

func (*Assignments) Rem 

func (a *Assignments) Rem(assignmentID flow.Identifier) bool

Rem will remove the given Assignment from the memory pool; it will return true if the Assignment was known and removed.

func (*Assignments) Size 

func (a *Assignments) Size() uint

Size will return the current size of the memory pool.

type Backdata 

type Backdata struct {
	// contains filtered or unexported fields
}

Backdata implements a generic memory pool backed by a Go map.

func NewBackdata 

func NewBackdata() Backdata

func (*Backdata) Add 

func (b *Backdata) Add(entity flow.Entity) bool

Add adds the given item to the pool.

func (*Backdata) Adjust 

func (b *Backdata) Adjust(entityID flow.Identifier, f func(flow.Entity) flow.Entity) (flow.Entity, bool)

Adjust will adjust the value item using the given function if the given key can be found. Returns a bool which indicates whether the value was updated as well as the updated value

func (*Backdata) All 

func (b *Backdata) All() []flow.Entity

All returns all entities from the pool.

func (*Backdata) ByID 

func (b *Backdata) ByID(entityID flow.Identifier) (flow.Entity, bool)

ByID returns the given item from the pool.

func (*Backdata) Has 

func (b *Backdata) Has(entityID flow.Identifier) bool

Has checks if we already contain the item with the given hash.

func (*Backdata) Hash 

func (b *Backdata) Hash() flow.Identifier

Hash will use a merkle root hash to hash all items.

func (*Backdata) Rem 

func (b *Backdata) Rem(entityID flow.Identifier) bool

Rem will remove the item with the given hash.

func (*Backdata) Size 

func (b *Backdata) Size() uint

Size will return the size of the backend.

type Backend 

type Backend struct {
	sync.RWMutex
	Backdata
	// contains filtered or unexported fields
}

Backend provides synchronized access to a backdata

func NewBackend 

func NewBackend(options ...OptionFunc) *Backend

NewBackend creates a new memory pool backend.

func (*Backend) Add 

func (b *Backend) Add(entity flow.Entity) bool

Add adds the given item to the pool.

func (*Backend) Adjust 

func (b *Backend) Adjust(entityID flow.Identifier, f func(flow.Entity) flow.Entity) (flow.Entity, bool)

Adjust will adjust the value item using the given function if the given key can be found. Returns a bool which indicates whether the value was updated.

func (*Backend) All 

func (b *Backend) All() []flow.Entity

All returns all entities from the pool.

func (*Backend) ByID 

func (b *Backend) ByID(entityID flow.Identifier) (flow.Entity, bool)

ByID returns the given item from the pool.

func (*Backend) Has 

func (b *Backend) Has(entityID flow.Identifier) bool

Has checks if we already contain the item with the given hash.

func (*Backend) Hash 

func (b *Backend) Hash() flow.Identifier

Hash will use a merkle root hash to hash all items.

func (*Backend) Limit 

func (b *Backend) Limit() uint

Limit returns the maximum number of items allowed in the backend.

func (*Backend) Rem 

func (b *Backend) Rem(entityID flow.Identifier) bool

Rem will remove the item with the given hash.

func (*Backend) Run 

func (b *Backend) Run(f func(backdata map[flow.Identifier]flow.Entity) error) error

Run executes a function giving it exclusive access to the backdata

func (*Backend) Size 

func (b *Backend) Size() uint

Size will return the size of the backend.

type BlockByCollectionBackdata 

type BlockByCollectionBackdata struct {
	*Backdata
}

BlockByCollectionBackdata contains all the collections is being requested, for each collection it stores the blocks that contains the collection. the Backdata is essentially map<collectionID>map<blockID>*ExecutableBlock

func (*BlockByCollectionBackdata) ByID 

func (b *BlockByCollectionBackdata) ByID(id flow.Identifier) (*entity.BlocksByCollection, bool)

type BlockByCollections 

type BlockByCollections struct {
	*Backend
}

Hold all the missing collections. Each entry is a missing collection, and all the blocks that contain this collection

func NewBlockByCollections 

func NewBlockByCollections() *BlockByCollections

func (*BlockByCollections) Add 

func (b *BlockByCollections) Add(block *entity.BlocksByCollection) bool

func (*BlockByCollections) Get 

func (b *BlockByCollections) Get(collID flow.Identifier) (*entity.BlocksByCollection, bool)

func (*BlockByCollections) Run 

func (b *BlockByCollections) Run(f func(backdata *BlockByCollectionBackdata) error) error

type Blocks 

type Blocks struct {
	*Backend
}

Blocks implements the blocks memory pool.

func NewBlocks 

func NewBlocks(limit uint) (*Blocks, error)

NewBlocks creates a new memory pool for blocks.

func (*Blocks) Add 

func (a *Blocks) Add(block *flow.Block) bool

Add adds an block to the mempool.

func (*Blocks) All 

func (a *Blocks) All() []*flow.Block

All returns all blocks from the pool.

func (*Blocks) ByID 

func (a *Blocks) ByID(blockID flow.Identifier) (*flow.Block, bool)

ByID returns the block with the given ID from the mempool.

type ChunkDataPacks 

type ChunkDataPacks struct {
	*Backend
}

ChunkDataPacks implements the ChunkDataPack memory pool.

func NewChunkDataPacks 

func NewChunkDataPacks(limit uint) (*ChunkDataPacks, error)

NewChunkDataPacks creates a new memory pool for ChunkDataPacks.

func (*ChunkDataPacks) Add 

func (c *ChunkDataPacks) Add(cdp *flow.ChunkDataPack) bool

Add adds an chunkDataPack to the mempool.

func (*ChunkDataPacks) All 

func (c *ChunkDataPacks) All() []*flow.ChunkDataPack

All returns all chunk data packs from the pool.

func (*ChunkDataPacks) ByChunkID 

func (c *ChunkDataPacks) ByChunkID(chunkID flow.Identifier) (*flow.ChunkDataPack, bool)

ByChunkID returns the chunk data pack with the given chunkID from the mempool.

func (*ChunkDataPacks) Has 

func (c *ChunkDataPacks) Has(chunkID flow.Identifier) bool

Has checks whether the ChunkDataPack with the given chunkID is currently in the memory pool.

func (*ChunkDataPacks) Hash 

func (c *ChunkDataPacks) Hash() flow.Identifier

Hash will return a hash of the contents of the memory pool.

func (*ChunkDataPacks) Rem 

func (c *ChunkDataPacks) Rem(chunkID flow.Identifier) bool

Rem will remove chunk data pack by ID

func (*ChunkDataPacks) Size 

func (c *ChunkDataPacks) Size() uint

Size will return the current size of the memory pool.

type Collections 

type Collections struct {
	*Backend
}

Collections implements a mempool storing collections.

func NewCollections 

func NewCollections(limit uint) (*Collections, error)

NewCollections creates a new memory pool for collection.

func (*Collections) Add 

func (c *Collections) Add(coll *flow.Collection) bool

Add adds a collection to the mempool.

func (*Collections) All 

func (c *Collections) All() []*flow.Collection

All returns all collections from the mempool.

func (*Collections) ByID 

func (c *Collections) ByID(collID flow.Identifier) (*flow.Collection, bool)

ByID returns the collection with the given ID from the mempool.

func (*Collections) Rem 

func (c *Collections) Rem(collID flow.Identifier) bool

Rem removes a collection by ID from memory

type EjectFunc 

type EjectFunc func(entities map[flow.Identifier]flow.Entity) (flow.Identifier, flow.Entity)

EjectFunc is a function used to pick an entity to evict from the memory pool backend when it overflows its limit. A custom eject function can be injected into the memory pool upon creation, which allows us to hook into the eject to clean up auxiliary data and/or to change the strategy of eviction.

type Guarantees 

type Guarantees struct {
	*Backend
}

Guarantees implements the collections memory pool of the consensus nodes, used to store collection guarantees and to generate block payloads.

func NewGuarantees 

func NewGuarantees(limit uint) (*Guarantees, error)

NewGuarantees creates a new memory pool for collection guarantees.

func (*Guarantees) Add 

func (g *Guarantees) Add(guarantee *flow.CollectionGuarantee) bool

Add adds a collection guarantee guarantee to the mempool.

func (*Guarantees) All 

func (g *Guarantees) All() []*flow.CollectionGuarantee

All returns all collection guarantees from the mempool.

func (*Guarantees) ByID 

func (g *Guarantees) ByID(collID flow.Identifier) (*flow.CollectionGuarantee, bool)

ByID returns the collection guarantee with the given ID from the mempool.

type IdentifierMap 

type IdentifierMap struct {
	*Backend
}

IdentifierMap represents a concurrency-safe memory pool for IdMapEntity.

func NewIdentifierMap 

func NewIdentifierMap(limit uint) (*IdentifierMap, error)

NewIdentifierMap creates a new memory pool for IdMapEntity.

func (*IdentifierMap) Append 

func (i *IdentifierMap) Append(key, id flow.Identifier) error

Append will append the id to the list of identifiers associated with key.

func (*IdentifierMap) Get 

func (i *IdentifierMap) Get(key flow.Identifier) ([]flow.Identifier, bool)

Get returns list of all identifiers associated with key and true, if the key exists in the mempool. Otherwise it returns nil and false.

func (*IdentifierMap) Has 

func (i *IdentifierMap) Has(key flow.Identifier) bool

Has returns true if the key exists in the map, i.e., there is at least an id attached to it.

func (*IdentifierMap) Keys 

func (i *IdentifierMap) Keys() ([]flow.Identifier, bool)

Keys returns a list of all keys in the mempool

func (*IdentifierMap) Rem 

func (i *IdentifierMap) Rem(key flow.Identifier) bool

Rem removes the given key with all associated identifiers.

func (*IdentifierMap) RemIdFromKey 

func (i *IdentifierMap) RemIdFromKey(key, id flow.Identifier) error

RemIdFromKey removes the id from the list of identifiers associated with key. If the list becomes empty, it also removes the key from the map.

func (*IdentifierMap) Size 

func (i *IdentifierMap) Size() uint

Size returns number of IdMapEntities in mempool

type Identifiers 

type Identifiers struct {
	*Backend
}

Identifiers represents a concurrency-safe memory pool for IDs.

func NewIdentifiers 

func NewIdentifiers(limit uint) (*Identifiers, error)

NewIdentifiers creates a new memory pool for identifiers.

func (*Identifiers) Add 

func (i *Identifiers) Add(id flow.Identifier) bool

Add will add the given identifier to the memory pool or it will error if the identifier is already in the memory pool.

func (*Identifiers) All 

func (i *Identifiers) All() flow.IdentifierList

All returns all identifiers stored in the mempool

func (*Identifiers) Has 

func (i *Identifiers) Has(id flow.Identifier) bool

Has checks whether the mempool has the identifier

func (*Identifiers) Rem 

func (i *Identifiers) Rem(id flow.Identifier) bool

Rem removes the given identifier from the memory pool; it will return true if the identifier was known and removed.

type LRUEjector 

type LRUEjector struct {
	sync.Mutex
	// contains filtered or unexported fields
}

LRUEjector provides a swift FIFO ejection functionality

func NewLRUEjector 

func NewLRUEjector() *LRUEjector

func (*LRUEjector) Eject 

func (q *LRUEjector) Eject(entities map[flow.Identifier]flow.Entity) (flow.Identifier, flow.Entity)

Eject implements EjectFunc for LRUEjector. It finds the entity with the lowest sequence number (i.e., the oldest entity). It also untracks

func (*LRUEjector) Track 

func (q *LRUEjector) Track(entityID flow.Identifier)

Track should be called every time a new entity is added to the mempool. It tracks the entity for later ejection.

func (*LRUEjector) Untrack 

func (q *LRUEjector) Untrack(entityID flow.Identifier)

Untrack simply removes the tracker of the ejector off the entityID

type OptionFunc 

type OptionFunc func(*Backend)

OptionFunc is a function that can be provided to the backend on creation in order to set a certain custom option.

func WithEject 

func WithEject(eject EjectFunc) OptionFunc

WithEject can be provided to the backend on creation in order to set a custom eject function to pick the entity to be evicted upon overflow, as well as hooking into it for additional cleanup work.

func WithLimit 

func WithLimit(limit uint) OptionFunc

WithLimit can be provided to the backend on creation in order to set a custom maximum limit of entities in the memory pool.

type Queues 

type Queues struct {
	*Backend
}

func NewQueues 

func NewQueues() *Queues

func (*Queues) Add 

func (b *Queues) Add(queue *queue.Queue) bool

func (*Queues) Get 

func (b *Queues) Get(queueID flow.Identifier) (*queue.Queue, bool)

func (*Queues) Run 

func (b *Queues) Run(f func(backdata *QueuesBackdata) error) error

type QueuesBackdata 

type QueuesBackdata struct {
	*Backdata
}

QueuesBackdata is mempool map for ingestion.Queues (head Node ID -> Queues)

func (*QueuesBackdata) All 

func (b *QueuesBackdata) All() []*queue.Queue

func (*QueuesBackdata) ByID 

func (b *QueuesBackdata) ByID(queueID flow.Identifier) (*queue.Queue, bool)

type ReceiptDataPacks 

type ReceiptDataPacks struct {
	*Backend
	// contains filtered or unexported fields
}

ReceiptDataPacks implements the ReceiptDataPack mempool. ReceiptDataPacks has an LRU ejector, i.e., it evicts the oldest entity if it gets full.

func NewReceiptDataPacks 

func NewReceiptDataPacks(limit uint) (*ReceiptDataPacks, error)

NewReceipts creates a new memory pool for execution receipts.

func (*ReceiptDataPacks) Add 

func (r *ReceiptDataPacks) Add(rdp *verification.ReceiptDataPack) bool

Add will add the given ReceiptDataPack to the memory pool. It will return false if it was already in the mempool.

func (*ReceiptDataPacks) All 

func (r *ReceiptDataPacks) All() []*verification.ReceiptDataPack

All will return all ReceiptDataPacks in the mempool.

func (*ReceiptDataPacks) Get 

func (r *ReceiptDataPacks) Get(rdpID flow.Identifier) (*verification.ReceiptDataPack, bool)

Get returns the ReceiptDataPack and true, if the ReceiptDataPack is in the mempool. Otherwise, it returns nil and false.

func (*ReceiptDataPacks) Rem 

func (r *ReceiptDataPacks) Rem(rdpID flow.Identifier) bool

Rem removes a ReceiptDataPack by ID.

func (*ReceiptDataPacks) Size 

func (r *ReceiptDataPacks) Size() uint

Size returns total number ReceiptDataPacks in mempool

type Receipts 

type Receipts struct {
	*Backend
}

Receipts implements the execution receipts memory pool of the consensus node, used to store execution receipts and to generate block seals.

func NewReceipts 

func NewReceipts(limit uint) (*Receipts, error)

NewReceipts creates a new memory pool for execution receipts.

func (*Receipts) Add 

func (r *Receipts) Add(receipt *flow.ExecutionReceipt) bool

Add adds an execution receipt to the mempool.

func (*Receipts) All 

func (r *Receipts) All() []*flow.ExecutionReceipt

All will return all execution receipts in the memory pool.

func (*Receipts) ByID 

func (r *Receipts) ByID(receiptID flow.Identifier) (*flow.ExecutionReceipt, bool)

ByID will retrieve an approval by ID.

func (*Receipts) Rem 

func (r *Receipts) Rem(receiptID flow.Identifier) bool

Rem will remove a receipt by ID.

type ResultDataPacks 

type ResultDataPacks struct {
	*Backend
	// contains filtered or unexported fields
}

ResultDataPacks implements the ResultDataPacks mempool interface. ResultDataPacks has an LRU ejector, i.e., it evicts the oldest entity if it gets full.

func NewResultDataPacks 

func NewResultDataPacks(limit uint) *ResultDataPacks

NewResultDataPacks creates a new mempool for execution results. The mempool has a FIFO ejector.

func (*ResultDataPacks) Add 

func (r *ResultDataPacks) Add(rdp *verification.ResultDataPack) bool

Add will add the given ResultDataPacks to the mempool. It will return false if it was already in the mempool.

func (*ResultDataPacks) Get 

func (r *ResultDataPacks) Get(rdpID flow.Identifier) (*verification.ResultDataPack, bool)

Get returns the ResultDataPacks and true, if the ResultDataPacks is in the mempool. Otherwise, it returns nil and false.

func (*ResultDataPacks) Has 

func (r *ResultDataPacks) Has(rdpID flow.Identifier) bool

Has returns true if a ResultDataPacks with the specified identifier exists.

func (*ResultDataPacks) Rem 

func (r *ResultDataPacks) Rem(rdpID flow.Identifier) bool

Rem removes a ResultDataPacks by identifier.

func (*ResultDataPacks) Size 

func (r *ResultDataPacks) Size() uint

Size returns total number ResultDataPacks in mempool

type Results 

type Results struct {
	*Backend
}

Results implements the execution results memory pool of the consensus node, used to store execution results and to generate block seals.

func NewResults 

func NewResults(limit uint) (*Results, error)

NewResults creates a new memory pool for execution results.

func (*Results) Add 

func (r *Results) Add(result *flow.ExecutionResult) bool

Add adds an execution result to the mempool.

func (*Results) All 

func (r *Results) All() []*flow.ExecutionResult

All will return all execution results in the memory pool.

func (*Results) ByID 

func (r *Results) ByID(resultID flow.Identifier) (*flow.ExecutionResult, bool)

ByID will retrieve an approval by ID.

func (*Results) Rem 

func (r *Results) Rem(resultID flow.Identifier) bool

Rem will remove a result by ID.

type Seals 

type Seals struct {
	*Backend
}

Seals implements the block seals memory pool of the consensus nodes, used to store block seals.

func NewSeals 

func NewSeals(limit uint, opts ...OptionFunc) (*Seals, error)

NewSeals creates a new memory pool for block seals.

func (*Seals) Add 

func (s *Seals) Add(seal *flow.Seal) bool

Add adds an block seal to the mempool.

func (*Seals) All 

func (s *Seals) All() []*flow.Seal

All returns all block seals from the pool.

func (*Seals) ByID 

func (s *Seals) ByID(sealID flow.Identifier) (*flow.Seal, bool)

ByID returns the block seal with the given ID from the mempool.

func (*Seals) Rem 

func (s *Seals) Rem(sealID flow.Identifier) bool

Rem will remove a seal by ID.

type Time 

type Time struct {
	// contains filtered or unexported fields
}

func (*Time) Checksum 

func (t *Time) Checksum() flow.Identifier

func (*Time) ID 

func (t *Time) ID() flow.Identifier

type Times 

type Times struct {
	*Backend
}

Times implements the times memory pool used to store time.Times for an idetifier to track transaction metrics in access nodes

func NewTimes 

func NewTimes(limit uint) (*Times, error)

NewTimes creates a new memory pool for times

func (*Times) Add 

func (t *Times) Add(id flow.Identifier, ti time.Time) bool

Add adds a time to the mempool.

func (*Times) ByID 

func (t *Times) ByID(id flow.Identifier) (time.Time, bool)

ByID returns the time with the given ID from the mempool.

func (*Times) Rem 

func (t *Times) Rem(id flow.Identifier) bool

Rem removes the time with the given ID.

type TransactionTimings 

type TransactionTimings struct {
	*Backend
}

TransactionTimings implements the transaction timings memory pool of access nodes, used to store transaction timings to report the timing of individual transactions

func NewTransactionTimings 

func NewTransactionTimings(limit uint) (*TransactionTimings, error)

NewTransactionTimings creates a new memory pool for transaction timings

func (*TransactionTimings) Add 

func (t *TransactionTimings) Add(tx *flow.TransactionTiming) bool

Add adds a transaction timing to the mempool.

func (*TransactionTimings) Adjust 

func (t *TransactionTimings) Adjust(txID flow.Identifier, f func(*flow.TransactionTiming) *flow.TransactionTiming) (
	*flow.TransactionTiming, bool)

Adjust will adjust the transaction timing using the given function if the given key can be found. Returns a bool which indicates whether the value was updated as well as the updated value.

func (*TransactionTimings) All 

func (t *TransactionTimings) All() []*flow.TransactionTiming

All returns all transaction timings from the mempool.

func (*TransactionTimings) ByID 

func (t *TransactionTimings) ByID(txID flow.Identifier) (*flow.TransactionTiming, bool)

ByID returns the transaction timing with the given ID from the mempool.

func (*TransactionTimings) Rem 

func (t *TransactionTimings) Rem(txID flow.Identifier) bool

Rem removes the transaction timing with the given ID.

type Transactions 

type Transactions struct {
	*Backend
}

Transactions implements the transactions memory pool of the consensus nodes, used to store transactions and to generate block payloads.

func NewTransactions 

func NewTransactions(limit uint) (*Transactions, error)

NewTransactions creates a new memory pool for transctions.

func (*Transactions) Add 

func (t *Transactions) Add(tx *flow.TransactionBody) bool

Add adds a transaction to the mempool.

func (*Transactions) All 

func (t *Transactions) All() []*flow.TransactionBody

All returns all transactions from the mempool.

func (*Transactions) ByID 

func (t *Transactions) ByID(txID flow.Identifier) (*flow.TransactionBody, bool)

ByID returns the transaction with the given ID from the mempool.

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