db

Documentation

Index

• Variables
• func Key(key string) ds.Key
• type Datastore
  • func New(mainCtx *context.Context, keyStore string) *Datastore
  • func NewDatastore(path string, options *Options) (*Datastore, error)
  • func (d *Datastore) Batch(ctx context.Context) (ds.Batch, error)
  • func (d *Datastore) Close() error
  • func (d *Datastore) CollectGarbage(ctx context.Context) (err error)
  • func (d *Datastore) Delete(ctx context.Context, key ds.Key) error
  • func (d *Datastore) DiskUsage(ctx context.Context) (uint64, error)
  • func (d *Datastore) Get(ctx context.Context, key ds.Key) (value []byte, err error)
  • func (d *Datastore) GetExpiration(ctx context.Context, key ds.Key) (time.Time, error)
  • func (d *Datastore) GetSize(ctx context.Context, key ds.Key) (size int, err error)
  • func (d *Datastore) Has(ctx context.Context, key ds.Key) (bool, error)
  • func (d *Datastore) NewTransaction(ctx context.Context, readOnly bool) (ds.Txn, error)
  • func (d *Datastore) Put(ctx context.Context, key ds.Key, value []byte) error
  • func (d *Datastore) PutWithTTL(ctx context.Context, key ds.Key, value []byte, ttl time.Duration) error
  • func (d *Datastore) Query(ctx context.Context, q dsq.Query) (dsq.Results, error)
  • func (d *Datastore) Set(ctx context.Context, key ds.Key, value []byte, replace bool) error
  • func (d *Datastore) SetTTL(ctx context.Context, key ds.Key, ttl time.Duration) error
  • func (d *Datastore) Sync(ctx context.Context, prefix ds.Key) error
• type Options

Variables

var ErrClosed = errors.New("datastore closed")

Functions

func Key

func Key(key string) ds.Key

Types

type Datastore

type Datastore struct {
	DB *badger.DB
	// contains filtered or unexported fields
}

func New

func New(mainCtx *context.Context, keyStore string) *Datastore

func NewDatastore

func NewDatastore(path string, options *Options) (*Datastore, error)

NewDatastore creates a new badger datastore.

DO NOT set the Dir and/or ValuePath fields of opt, they will be set for you.

func (*Datastore) Batch

func (d *Datastore) Batch(ctx context.Context) (ds.Batch, error)

Batch creats a new Batch object. This provides a way to do many writes, when there may be too many to fit into a single transaction.

func (*Datastore) Close

func (d *Datastore) Close() error

func (*Datastore) CollectGarbage

func (d *Datastore) CollectGarbage(ctx context.Context) (err error)

func (*Datastore) Delete

func (d *Datastore) Delete(ctx context.Context, key ds.Key) error

func (*Datastore) DiskUsage

func (d *Datastore) DiskUsage(ctx context.Context) (uint64, error)

DiskUsage implements the PersistentDatastore interface. It returns the sum of lsm and value log files sizes in bytes.

func (*Datastore) Get

func (d *Datastore) Get(ctx context.Context, key ds.Key) (value []byte, err error)

func (*Datastore) GetExpiration

func (d *Datastore) GetExpiration(ctx context.Context, key ds.Key) (time.Time, error)

func (*Datastore) GetSize

func (d *Datastore) GetSize(ctx context.Context, key ds.Key) (size int, err error)

func (*Datastore) Has

func (d *Datastore) Has(ctx context.Context, key ds.Key) (bool, error)

func (*Datastore) NewTransaction

func (d *Datastore) NewTransaction(ctx context.Context, readOnly bool) (ds.Txn, error)

NewTransaction starts a new transaction. The resulting transaction object can be mutated without incurring changes to the underlying Datastore until the transaction is Committed.

func (*Datastore) Put

func (d *Datastore) Put(ctx context.Context, key ds.Key, value []byte) error

func (*Datastore) PutWithTTL

func (d *Datastore) PutWithTTL(ctx context.Context, key ds.Key, value []byte, ttl time.Duration) error

func (*Datastore) Query

func (d *Datastore) Query(ctx context.Context, q dsq.Query) (dsq.Results, error)

func (*Datastore) Set

func (d *Datastore) Set(ctx context.Context, key ds.Key, value []byte, replace bool) error

func (*Datastore) SetTTL

func (d *Datastore) SetTTL(ctx context.Context, key ds.Key, ttl time.Duration) error

func (*Datastore) Sync

func (d *Datastore) Sync(ctx context.Context, prefix ds.Key) error

type Options

type Options struct {
	// Please refer to the Badger docs to see what this is for
	GcDiscardRatio float64

	// Interval between GC cycles
	//
	// If zero, the datastore will perform no automatic garbage collection.
	GcInterval time.Duration

	// Sleep time between rounds of a single GC cycle.
	//
	// If zero, the datastore will only perform one round of GC per
	// GcInterval.
	GcSleep time.Duration

	badger.Options
}

Options are the badger datastore options, reexported here for convenience.

var DefaultOptions Options

DefaultOptions are the default options for the badger datastore.