ethdb

package
v1.8.22 Latest Latest
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Published: Jan 31, 2019 License: GPL-3.0 Imports: 15 Imported by: 0

Documentation

Index

Constants

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const IdealBatchSize = 100 * 1024

Code using batches should try to add this much data to the batch. The value was determined empirically.

Variables

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var OpenFileLimit = 64

Functions

This section is empty.

Types

type Batch added in v1.2.2

type Batch interface {
	Putter
	Deleter
	ValueSize() int // amount of data in the batch
	Write() error
	// Reset resets the batch for reuse
	Reset()
}

Batch is a write-only database that commits changes to its host database when Write is called. Batch cannot be used concurrently.

func NewTableBatch added in v1.5.7

func NewTableBatch(db Database, prefix string) Batch

NewTableBatch returns a Batch object which prefixes all keys with a given string.

type Database added in v1.2.2

type Database interface {
	Putter
	Deleter
	Get(key []byte) ([]byte, error)
	Has(key []byte) (bool, error)
	Close()
	NewBatch() Batch
}

Database wraps all database operations. All methods are safe for concurrent use.

func NewTable added in v1.5.7

func NewTable(db Database, prefix string) Database

NewTable returns a Database object that prefixes all keys with a given string.

type Deleter added in v1.8.12

type Deleter interface {
	Delete(key []byte) error
}

Deleter wraps the database delete operation supported by both batches and regular databases.

type LDBDatabase

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

func NewLDBDatabase

func NewLDBDatabase(file string, cache int, handles int) (*LDBDatabase, error)

NewLDBDatabase returns a LevelDB wrapped object.

func (*LDBDatabase) Close

func (db *LDBDatabase) Close()

func (*LDBDatabase) Delete

func (db *LDBDatabase) Delete(key []byte) error

Delete deletes the key from the queue and database

func (*LDBDatabase) Get

func (db *LDBDatabase) Get(key []byte) ([]byte, error)

Get returns the given key if it's present.

func (*LDBDatabase) Has added in v1.7.0

func (db *LDBDatabase) Has(key []byte) (bool, error)

func (*LDBDatabase) LDB added in v0.9.34

func (db *LDBDatabase) LDB() *leveldb.DB

func (*LDBDatabase) Meter added in v0.9.38

func (db *LDBDatabase) Meter(prefix string)

Meter configures the database metrics collectors and

func (*LDBDatabase) NewBatch added in v1.2.2

func (db *LDBDatabase) NewBatch() Batch

func (*LDBDatabase) NewIterator

func (db *LDBDatabase) NewIterator() iterator.Iterator

func (*LDBDatabase) NewIteratorWithPrefix added in v1.8.3

func (db *LDBDatabase) NewIteratorWithPrefix(prefix []byte) iterator.Iterator

NewIteratorWithPrefix returns a iterator to iterate over subset of database content with a particular prefix.

func (*LDBDatabase) Path added in v1.4.18

func (db *LDBDatabase) Path() string

Path returns the path to the database directory.

func (*LDBDatabase) Put

func (db *LDBDatabase) Put(key []byte, value []byte) error

Put puts the given key / value to the queue

type MemDatabase

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

* This is a test memory database. Do not use for any production it does not get persisted

func NewMemDatabase

func NewMemDatabase() *MemDatabase

func NewMemDatabaseWithCap added in v1.8.0

func NewMemDatabaseWithCap(size int) *MemDatabase

func (*MemDatabase) Close

func (db *MemDatabase) Close()

func (*MemDatabase) Delete

func (db *MemDatabase) Delete(key []byte) error

func (*MemDatabase) Get

func (db *MemDatabase) Get(key []byte) ([]byte, error)

func (*MemDatabase) Has added in v1.7.0

func (db *MemDatabase) Has(key []byte) (bool, error)

func (*MemDatabase) Keys added in v1.2.2

func (db *MemDatabase) Keys() [][]byte

func (*MemDatabase) Len added in v1.8.0

func (db *MemDatabase) Len() int

func (*MemDatabase) NewBatch added in v1.2.2

func (db *MemDatabase) NewBatch() Batch

func (*MemDatabase) Put

func (db *MemDatabase) Put(key []byte, value []byte) error

type Putter added in v1.7.0

type Putter interface {
	Put(key []byte, value []byte) error
}

Putter wraps the database write operation supported by both batches and regular databases.

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