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interface.go
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interface.go
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// Code generated by atomix-go-framework. DO NOT EDIT.
package lock
import (
"fmt"
lock "github.com/atomix/atomix-api/go/atomix/primitive/lock"
errors "github.com/atomix/atomix-go-framework/pkg/atomix/errors"
rsm "github.com/atomix/atomix-go-framework/pkg/atomix/storage/protocol/rsm"
util "github.com/atomix/atomix-go-framework/pkg/atomix/util"
proto "github.com/golang/protobuf/proto"
uuid "github.com/google/uuid"
"io"
)
type Service interface {
ServiceContext
Backup(SnapshotWriter) error
Restore(SnapshotReader) error
// Lock attempts to acquire the lock
Lock(LockProposal) error
// Unlock releases the lock
Unlock(UnlockProposal) error
// GetLock gets the lock state
GetLock(GetLockProposal) error
}
type ServiceContext interface {
Scheduler() rsm.Scheduler
Sessions() Sessions
Proposals() Proposals
}
func newServiceContext(scheduler rsm.Scheduler) ServiceContext {
return &serviceContext{
scheduler: scheduler,
sessions: newSessions(),
proposals: newProposals(),
}
}
type serviceContext struct {
scheduler rsm.Scheduler
sessions Sessions
proposals Proposals
}
func (s *serviceContext) Scheduler() rsm.Scheduler {
return s.scheduler
}
func (s *serviceContext) Sessions() Sessions {
return s.sessions
}
func (s *serviceContext) Proposals() Proposals {
return s.proposals
}
var _ ServiceContext = &serviceContext{}
type SnapshotWriter interface {
WriteState(*LockState) error
}
func newSnapshotWriter(writer io.Writer) SnapshotWriter {
return &serviceSnapshotWriter{
writer: writer,
}
}
type serviceSnapshotWriter struct {
writer io.Writer
}
func (w *serviceSnapshotWriter) WriteState(state *LockState) error {
bytes, err := proto.Marshal(state)
if err != nil {
return err
}
err = util.WriteBytes(w.writer, bytes)
if err != nil {
return err
}
return err
}
var _ SnapshotWriter = &serviceSnapshotWriter{}
type SnapshotReader interface {
ReadState() (*LockState, error)
}
func newSnapshotReader(reader io.Reader) SnapshotReader {
return &serviceSnapshotReader{
reader: reader,
}
}
type serviceSnapshotReader struct {
reader io.Reader
}
func (r *serviceSnapshotReader) ReadState() (*LockState, error) {
bytes, err := util.ReadBytes(r.reader)
if err != nil {
return nil, err
}
state := &LockState{}
err = proto.Unmarshal(bytes, state)
if err != nil {
return nil, err
}
return state, nil
}
var _ SnapshotReader = &serviceSnapshotReader{}
type Sessions interface {
open(Session)
expire(SessionID)
close(SessionID)
Get(SessionID) (Session, bool)
List() []Session
}
func newSessions() Sessions {
return &serviceSessions{
sessions: make(map[SessionID]Session),
}
}
type serviceSessions struct {
sessions map[SessionID]Session
}
func (s *serviceSessions) open(session Session) {
s.sessions[session.ID()] = session
session.setState(SessionOpen)
}
func (s *serviceSessions) expire(sessionID SessionID) {
session, ok := s.sessions[sessionID]
if ok {
session.setState(SessionClosed)
delete(s.sessions, sessionID)
}
}
func (s *serviceSessions) close(sessionID SessionID) {
session, ok := s.sessions[sessionID]
if ok {
session.setState(SessionClosed)
delete(s.sessions, sessionID)
}
}
func (s *serviceSessions) Get(id SessionID) (Session, bool) {
session, ok := s.sessions[id]
return session, ok
}
func (s *serviceSessions) List() []Session {
sessions := make([]Session, 0, len(s.sessions))
for _, session := range s.sessions {
sessions = append(sessions, session)
}
return sessions
}
var _ Sessions = &serviceSessions{}
type SessionID uint64
type SessionState int
const (
SessionClosed SessionState = iota
SessionOpen
)
type Watcher interface {
Cancel()
}
func newWatcher(f func()) Watcher {
return &serviceWatcher{
f: f,
}
}
type serviceWatcher struct {
f func()
}
func (s *serviceWatcher) Cancel() {
s.f()
}
var _ Watcher = &serviceWatcher{}
type Session interface {
ID() SessionID
State() SessionState
setState(SessionState)
Watch(func(SessionState)) Watcher
Proposals() Proposals
}
func newSession(session rsm.Session) Session {
return &serviceSession{
session: session,
proposals: newProposals(),
watchers: make(map[string]func(SessionState)),
}
}
type serviceSession struct {
session rsm.Session
proposals Proposals
state SessionState
watchers map[string]func(SessionState)
}
func (s *serviceSession) ID() SessionID {
return SessionID(s.session.ID())
}
func (s *serviceSession) Proposals() Proposals {
return s.proposals
}
func (s *serviceSession) State() SessionState {
return s.state
}
func (s *serviceSession) setState(state SessionState) {
if state != s.state {
s.state = state
for _, watcher := range s.watchers {
watcher(state)
}
}
}
func (s *serviceSession) Watch(f func(SessionState)) Watcher {
id := uuid.New().String()
s.watchers[id] = f
return newWatcher(func() {
delete(s.watchers, id)
})
}
var _ Session = &serviceSession{}
type Proposals interface {
Lock() LockProposals
Unlock() UnlockProposals
GetLock() GetLockProposals
}
func newProposals() Proposals {
return &serviceProposals{
lockProposals: newLockProposals(),
unlockProposals: newUnlockProposals(),
getLockProposals: newGetLockProposals(),
}
}
type serviceProposals struct {
lockProposals LockProposals
unlockProposals UnlockProposals
getLockProposals GetLockProposals
}
func (s *serviceProposals) Lock() LockProposals {
return s.lockProposals
}
func (s *serviceProposals) Unlock() UnlockProposals {
return s.unlockProposals
}
func (s *serviceProposals) GetLock() GetLockProposals {
return s.getLockProposals
}
var _ Proposals = &serviceProposals{}
type ProposalID uint64
type Proposal interface {
fmt.Stringer
ID() ProposalID
Session() Session
}
func newProposal(id ProposalID, session Session) Proposal {
return &serviceProposal{
id: id,
session: session,
}
}
type serviceProposal struct {
id ProposalID
session Session
}
func (p *serviceProposal) ID() ProposalID {
return p.id
}
func (p *serviceProposal) Session() Session {
return p.session
}
func (p *serviceProposal) String() string {
return fmt.Sprintf("ProposalID: %d, SessionID: %d", p.id, p.session.ID())
}
var _ Proposal = &serviceProposal{}
type LockProposals interface {
register(LockProposal)
unregister(ProposalID)
Get(ProposalID) (LockProposal, bool)
List() []LockProposal
}
func newLockProposals() LockProposals {
return &lockProposals{
proposals: make(map[ProposalID]LockProposal),
}
}
type lockProposals struct {
proposals map[ProposalID]LockProposal
}
func (p *lockProposals) register(proposal LockProposal) {
p.proposals[proposal.ID()] = proposal
}
func (p *lockProposals) unregister(id ProposalID) {
delete(p.proposals, id)
}
func (p *lockProposals) Get(id ProposalID) (LockProposal, bool) {
proposal, ok := p.proposals[id]
return proposal, ok
}
func (p *lockProposals) List() []LockProposal {
proposals := make([]LockProposal, 0, len(p.proposals))
for _, proposal := range p.proposals {
proposals = append(proposals, proposal)
}
return proposals
}
var _ LockProposals = &lockProposals{}
type LockProposal interface {
Proposal
Request() *lock.LockRequest
Reply(*lock.LockResponse) error
Fail(error) error
Close() error
}
func newLockProposal(id ProposalID, session Session, request *lock.LockRequest, stream rsm.Stream) LockProposal {
return &lockProposal{
Proposal: newProposal(id, session),
request: request,
stream: stream,
}
}
type lockProposal struct {
Proposal
request *lock.LockRequest
stream rsm.Stream
complete bool
}
func (p *lockProposal) Request() *lock.LockRequest {
return p.request
}
func (p *lockProposal) Reply(reply *lock.LockResponse) error {
if p.complete {
return errors.NewConflict("reply already sent")
}
log.Debugf("Accepted LockProposal %s: %s", p, reply)
p.complete = true
bytes, err := proto.Marshal(reply)
if err != nil {
p.stream.Error(err)
return err
} else {
p.stream.Value(bytes)
}
p.stream.Close()
return nil
}
func (p *lockProposal) Fail(err error) error {
if p.complete {
return errors.NewConflict("reply already sent")
}
log.Warnf("Rejected LockProposals %s: %s", p, err)
p.complete = true
p.stream.Error(err)
p.stream.Close()
return nil
}
func (p *lockProposal) Close() error {
if p.complete {
return errors.NewConflict("reply already sent")
}
p.complete = true
p.stream.Close()
return nil
}
func (p *lockProposal) String() string {
return fmt.Sprintf("ProposalID=%d, SessionID=%d, Request=%s", p.ID(), p.Session().ID(), p.request)
}
var _ LockProposal = &lockProposal{}
type UnlockProposals interface {
register(UnlockProposal)
unregister(ProposalID)
Get(ProposalID) (UnlockProposal, bool)
List() []UnlockProposal
}
func newUnlockProposals() UnlockProposals {
return &unlockProposals{
proposals: make(map[ProposalID]UnlockProposal),
}
}
type unlockProposals struct {
proposals map[ProposalID]UnlockProposal
}
func (p *unlockProposals) register(proposal UnlockProposal) {
p.proposals[proposal.ID()] = proposal
}
func (p *unlockProposals) unregister(id ProposalID) {
delete(p.proposals, id)
}
func (p *unlockProposals) Get(id ProposalID) (UnlockProposal, bool) {
proposal, ok := p.proposals[id]
return proposal, ok
}
func (p *unlockProposals) List() []UnlockProposal {
proposals := make([]UnlockProposal, 0, len(p.proposals))
for _, proposal := range p.proposals {
proposals = append(proposals, proposal)
}
return proposals
}
var _ UnlockProposals = &unlockProposals{}
type UnlockProposal interface {
Proposal
Request() *lock.UnlockRequest
Reply(*lock.UnlockResponse) error
response() *lock.UnlockResponse
}
func newUnlockProposal(id ProposalID, session Session, request *lock.UnlockRequest) UnlockProposal {
return &unlockProposal{
Proposal: newProposal(id, session),
req: request,
}
}
type unlockProposal struct {
Proposal
req *lock.UnlockRequest
res *lock.UnlockResponse
}
func (p *unlockProposal) Request() *lock.UnlockRequest {
return p.req
}
func (p *unlockProposal) Reply(reply *lock.UnlockResponse) error {
if p.res != nil {
return errors.NewConflict("reply already sent")
}
log.Debugf("Accepted UnlockProposal %s: %s", p, reply)
p.res = reply
return nil
}
func (p *unlockProposal) response() *lock.UnlockResponse {
return p.res
}
func (p *unlockProposal) String() string {
return fmt.Sprintf("ProposalID=%d, SessionID=%d, Request=%s", p.ID(), p.Session().ID(), p.req)
}
var _ UnlockProposal = &unlockProposal{}
type GetLockProposals interface {
register(GetLockProposal)
unregister(ProposalID)
Get(ProposalID) (GetLockProposal, bool)
List() []GetLockProposal
}
func newGetLockProposals() GetLockProposals {
return &getLockProposals{
proposals: make(map[ProposalID]GetLockProposal),
}
}
type getLockProposals struct {
proposals map[ProposalID]GetLockProposal
}
func (p *getLockProposals) register(proposal GetLockProposal) {
p.proposals[proposal.ID()] = proposal
}
func (p *getLockProposals) unregister(id ProposalID) {
delete(p.proposals, id)
}
func (p *getLockProposals) Get(id ProposalID) (GetLockProposal, bool) {
proposal, ok := p.proposals[id]
return proposal, ok
}
func (p *getLockProposals) List() []GetLockProposal {
proposals := make([]GetLockProposal, 0, len(p.proposals))
for _, proposal := range p.proposals {
proposals = append(proposals, proposal)
}
return proposals
}
var _ GetLockProposals = &getLockProposals{}
type GetLockProposal interface {
Proposal
Request() *lock.GetLockRequest
Reply(*lock.GetLockResponse) error
response() *lock.GetLockResponse
}
func newGetLockProposal(id ProposalID, session Session, request *lock.GetLockRequest) GetLockProposal {
return &getLockProposal{
Proposal: newProposal(id, session),
req: request,
}
}
type getLockProposal struct {
Proposal
req *lock.GetLockRequest
res *lock.GetLockResponse
}
func (p *getLockProposal) Request() *lock.GetLockRequest {
return p.req
}
func (p *getLockProposal) Reply(reply *lock.GetLockResponse) error {
if p.res != nil {
return errors.NewConflict("reply already sent")
}
log.Debugf("Accepted GetLockProposal %s: %s", p, reply)
p.res = reply
return nil
}
func (p *getLockProposal) response() *lock.GetLockResponse {
return p.res
}
func (p *getLockProposal) String() string {
return fmt.Sprintf("ProposalID=%d, SessionID=%d, Request=%s", p.ID(), p.Session().ID(), p.req)
}
var _ GetLockProposal = &getLockProposal{}