store

Documentation

Index

• Constants
• type Config
• type EventStore
  • func New(cfg Config) (*EventStore, error)
  • func (e *EventStore) Events(ctx context.Context, typ string, idx []byte) ([]*messages.Event, error)
  • func (e *EventStore) Start(ctx context.Context) error
  • func (e *EventStore) Wait() chan error
• type Storage

Constants

const LoggerTag = "EVENT_STORE"

Types

type Config

type Config struct {
	Storage   Storage
	Transport transport.Transport
	Log       log.Logger
}

Config contains configuration parameters for EventStore.

type EventStore

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

EventStore listens for event messages using the transport and stores them for later use.

func New

func New(cfg Config) (*EventStore, error)

New returns a new instance of the EventStore struct.

func (*EventStore) Events

func (e *EventStore) Events(ctx context.Context, typ string, idx []byte) ([]*messages.Event, error)

Events returns events for the given type and index. The method is thread-safe.

func (*EventStore) Start

func (e *EventStore) Start(ctx context.Context) error

func (*EventStore) Wait

func (e *EventStore) Wait() chan error

Wait waits until the context is canceled or until an error occurs.

type Storage

type Storage interface {
	// Add adds an event to the store. If the event already exists, it will be
	// updated if the MessageDate is newer. The first argument is true if the
	// event was added, false if it was replaced. The method is thread-safe.
	Add(ctx context.Context, author []byte, evt *messages.Event) (bool, error)
	// Get returns messages form the store for the given type and index. If the
	// message does not exist, nil will be returned. The method is thread-safe.
	Get(ctx context.Context, typ string, idx []byte) ([]*messages.Event, error)
}

Storage provides an interface to the event storage mechanism.