ethdb

package
v5.5.3+incompatible Latest Latest
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Published: Jan 15, 2019 License: GPL-3.0 Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source
const IdealBatchSize = 100 * 1024

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

Variables

View Source
var OpenFileLimit = 64

Functions

func NewBytesPrefix

func NewBytesPrefix(prefix []byte) *ldbutil.Range

func SetCacheRatio

func SetCacheRatio(db string, ratio float64)

func SetHandleRatio

func SetHandleRatio(db string, ratio float64)

Types

type Batch added in v1.4.0

type Batch interface {
	Putter
	ValueSize() int // amount of data in the batch
	Write() error
}

func NewTableBatch

func NewTableBatch(db Database, prefix string) Batch

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

type Database added in v1.4.0

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

func NewTable

func NewTable(db Database, prefix string) Database

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

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 (self *LDBDatabase) Close()

func (*LDBDatabase) Delete

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

Delete deletes the key from the queue and database

func (*LDBDatabase) Get

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

Get returns the given key if it's present.

func (*LDBDatabase) Has

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

func (*LDBDatabase) LDB

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

func (*LDBDatabase) NewBatch added in v1.4.0

func (db *LDBDatabase) NewBatch() Batch

func (*LDBDatabase) NewIterator

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

func (*LDBDatabase) NewIteratorRange

func (self *LDBDatabase) NewIteratorRange(slice *ldbutil.Range) iterator.Iterator

func (*LDBDatabase) Path

func (db *LDBDatabase) Path() string

Path returns the path to the database directory.

func (*LDBDatabase) Put

func (self *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, error)

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

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

func (*MemDatabase) Keys added in v1.4.0

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

func (*MemDatabase) NewBatch added in v1.4.0

func (db *MemDatabase) NewBatch() Batch

func (*MemDatabase) Put

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

func (*MemDatabase) Set

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

type Putter

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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