session

package
v1.15.1 Latest Latest
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 Go to latest Published: Aug 28, 2026 License: Apache-2.0 Imports: 12 Imported by: 0

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Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrSpaceUnknown   = errors.New("space not registered")
	ErrSpaceExpired   = errors.New("space expired")
	ErrSpaceForbidden = errors.New("space access denied")
)

Errors returned by the space registry.

Functions

This section is empty.

Types

type MemoryBank 

type MemoryBank struct {
	Store store.VectorStore
}

MemoryBank is a thin wrapper around a VectorStore implementation.

func NewMemoryBank 

func NewMemoryBank(ctx context.Context, connStr string) (*MemoryBank, error)

NewMemoryBank creates a new Postgres-backed memory bank.

func NewMemoryBankWithStore 

func NewMemoryBankWithStore(s store.VectorStore) *MemoryBank

NewMemoryBankWithStore creates a memory bank backed by a custom vector store implementation.

func (*MemoryBank) Close 

func (mb *MemoryBank) Close() error

Close releases underlying resources if the store implements io.Closer.

func (*MemoryBank) CreateSchema 

func (mb *MemoryBank) CreateSchema(ctx context.Context, schemaPath string) error

CreateSchema initialises the backing store if it supports schema management.

func (*MemoryBank) SearchMemory 

func (mb *MemoryBank) SearchMemory(ctx context.Context, sessionID string, queryEmbedding []float32, limit int) ([]model.MemoryRecord, error)

SearchMemory returns top-k similar memories

func (*MemoryBank) StoreMemory 

func (mb *MemoryBank) StoreMemory(ctx context.Context, sessionID, content, metadata string, embedding []float32) error

StoreMemory inserts a long-term record

type SessionMemory 

type SessionMemory struct {
	Bank *MemoryBank

	Embedder embed.Embedder
	Engine   *memengine.Engine
	Spaces   *SpaceRegistry
	// contains filtered or unexported fields
}

SessionMemory wraps MemoryBank with short- and long-term layers including a configurable short-term buffer and embedding provider.

func NewSessionMemory 

func NewSessionMemory(bank *MemoryBank, shortTermSize int) *SessionMemory

NewSessionMemory wraps MemoryBank with short-term cache

func (*SessionMemory) AddShortTerm 

func (sm *SessionMemory) AddShortTerm(sessionID, content, metadata string, embedding []float32)

AddShortTerm stores in ephemeral session cache

func (*SessionMemory) Embed 

func (sm *SessionMemory) Embed(ctx context.Context, text string) ([]float32, error)

Embed ensures an embedder is available and returns the embedding for the text.

func (*SessionMemory) ExportShortTerm added in v1.10.3 

func (sm *SessionMemory) ExportShortTerm() map[string][]model.MemoryRecord

ExportShortTerm returns a snapshot of the in-memory short-term history.

func (*SessionMemory) FlushToLongTerm 

func (sm *SessionMemory) FlushToLongTerm(ctx context.Context, sessionID string) error

FlushToLongTerm writes the short-term cache to the configured vector store.

func (*SessionMemory) ImportShortTerm added in v1.10.3 

func (sm *SessionMemory) ImportShortTerm(data map[string][]model.MemoryRecord)

ImportShortTerm overwrites the in-memory short-term history with the provided data.

func (*SessionMemory) RetrieveContext 

func (sm *SessionMemory) RetrieveContext(ctx context.Context, sessionID, query string, limit int) ([]model.MemoryRecord, error)

RetrieveContext returns combined short- and long-term memory

func (*SessionMemory) WithEmbedder 

func (sm *SessionMemory) WithEmbedder(e embed.Embedder) *SessionMemory

WithEmbedder overrides the embedder used by the session memory.

func (*SessionMemory) WithEngine 

func (sm *SessionMemory) WithEngine(e *memengine.Engine) *SessionMemory

WithEngine attaches an advanced memory engine for long-term storage and retrieval.

type SharedSession 

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

func NewSharedSession 

func NewSharedSession(base *SessionMemory, local string, spaces ...string) *SharedSession

NewSharedSession binds a local sessionID and optional initial shared spaces.

func (*SharedSession) AddShortLocal 

func (ss *SharedSession) AddShortLocal(content string, metadata map[string]string)

AddShortLocal appends a short-term memory to the *local* session buffer.

func (*SharedSession) AddShortTo 

func (ss *SharedSession) AddShortTo(space, content string, metadata map[string]string) error

AddShortTo writes a short-term memory directly into a shared space buffer.

func (*SharedSession) BroadcastLong 

func (ss *SharedSession) BroadcastLong(ctx context.Context, content string, metadata map[string]any) ([]model.MemoryRecord, error)

BroadcastLong writes a long-term memory to the local session and all spaces.

func (*SharedSession) ExportJoinedSpaces added in v1.10.3 

func (ss *SharedSession) ExportJoinedSpaces() []string

ExportJoinedSpaces returns the list of currently joined shared spaces.

func (*SharedSession) FlushLocal 

func (ss *SharedSession) FlushLocal(ctx context.Context) error

FlushLocal promotes the local short-term buffer to long-term storage.

func (*SharedSession) FlushSpace 

func (ss *SharedSession) FlushSpace(ctx context.Context, space string) error

FlushSpace promotes a shared space short-term buffer to long-term.

func (*SharedSession) ImportJoinedSpaces added in v1.10.3 

func (ss *SharedSession) ImportJoinedSpaces(spaces []string)

ImportJoinedSpaces restores the list of joined shared spaces.

func (*SharedSession) Join 

func (ss *SharedSession) Join(space string) error

Join adds a shared space (sessionID) to the view.

func (*SharedSession) Leave 

func (ss *SharedSession) Leave(space string)

Leave removes a shared space (sessionID) from the view.

func (*SharedSession) Retrieve 

func (ss *SharedSession) Retrieve(ctx context.Context, query string, limit int) ([]model.MemoryRecord, error)

Retrieve merges short-term (local + spaces) and filtered long-term results. Long-term retrieval oversamples then filters to the allowed sessionIDs.

func (*SharedSession) RetrieveShared 

func (ss *SharedSession) RetrieveShared(ctx context.Context, query string, limit int) ([]model.MemoryRecord, error)

RetrieveShared returns only joined shared spaces (excludes local).

func (*SharedSession) Spaces 

func (ss *SharedSession) Spaces() []string

Spaces returns the current list of shared spaces.

func (*SharedSession) StoreLongTo 

func (ss *SharedSession) StoreLongTo(ctx context.Context, sessionID, content string, metadata map[string]any) (model.MemoryRecord, error)

StoreLongTo writes a long-term memory directly to a specific session/space. If Engine is configured it will be used; otherwise we fall back to Bank + Embed.

type Space 

type Space struct {
	Name      string
	ACL       map[string]SpaceRole
	ExpiresAt time.Time
	CreatedAt time.Time
	UpdatedAt time.Time
}

Space represents a collaborative memory namespace shared across sessions.

type SpaceRegistry 

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

SpaceRegistry keeps track of collaborative memory spaces, their ACLs and TTLs.

func NewSpaceRegistry 

func NewSpaceRegistry(defaultTTL time.Duration) *SpaceRegistry

NewSpaceRegistry builds an empty registry with the provided default TTL.

func (*SpaceRegistry) CanRead 

func (sr *SpaceRegistry) CanRead(spaceName, principal string) bool

CanRead reports whether the principal has read access to the space.

func (*SpaceRegistry) CanWrite 

func (sr *SpaceRegistry) CanWrite(spaceName, principal string) bool

CanWrite reports whether the principal has write access to the space.

func (*SpaceRegistry) Check 

func (sr *SpaceRegistry) Check(spaceName, principal string, requireWrite bool) error

Check enforces access and returns explicit errors.

func (*SpaceRegistry) Grant 

func (sr *SpaceRegistry) Grant(spaceName, principal string, role SpaceRole, ttl time.Duration) error

Grant assigns or updates a role for a principal inside a space.

func (*SpaceRegistry) List 

func (sr *SpaceRegistry) List(principal string) []string

List returns active spaces the principal can read.

func (*SpaceRegistry) Prune 

func (sr *SpaceRegistry) Prune() []string

Prune removes expired spaces.

func (*SpaceRegistry) Revoke 

func (sr *SpaceRegistry) Revoke(spaceName, principal string)

Revoke removes a principal from the space ACL.

func (*SpaceRegistry) Upsert 

func (sr *SpaceRegistry) Upsert(name string, ttl time.Duration, acl map[string]SpaceRole) *Space

Upsert creates or updates a space definition.

type SpaceRole 

type SpaceRole string

SpaceRole defines the access level granted to a principal within a shared space. 

const (
	SpaceRoleReader SpaceRole = "reader"
	SpaceRoleWriter SpaceRole = "writer"
	SpaceRoleAdmin  SpaceRole = "admin"
)

Source Files

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