92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
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package actions
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import (
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"time"
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"github.com/satori/go.uuid"
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storage "../storage"
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serializer "../serializer"
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data "../data"
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)
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var mapLock chan int = make(chan int, 1)
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var streamsLock map[string]chan int = make(map[string]chan int)
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type ActionsHandler struct {
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storage storage.Storage
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serializer serializer.Serializer
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}
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func NewActionsHandler(storage storage.Storage, serializer serializer.Serializer) *ActionsHandler {
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return &ActionsHandler{storage, serializer}
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}
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func lockStream(streamName string) {
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mapLock <- 1
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defer func(){
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<-mapLock
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}()
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streamLock := streamsLock[streamName]
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if streamLock == nil {
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streamLock = make(chan int, 1)
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streamsLock[streamName] = streamLock
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}
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streamLock <- 1
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}
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func unlockStream(streamName string) {
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<-streamsLock[streamName]
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}
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func (me ActionsHandler) AddEvent(event data.Event) error {
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streamName := event.AggregateId.String()
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lockStream(streamName)
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defer unlockStream(streamName)
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serializedPayload, typeId, err := me.serializer.Serialize(event.Payload)
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if err != nil {
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return err
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}
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return me.storage.Write(&storage.StoredEvent{StreamId: event.AggregateId, CreationTime: time.Now(), TypeId: typeId, Data: serializedPayload})
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}
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func (me ActionsHandler) RetrieveFor(aggregateId uuid.UUID) ([]*data.Event, error) {
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results, err := me.storage.ReadStream(aggregateId)
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if err != nil {
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return nil, err
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}
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events := make([]*data.Event, 0)
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for _, storedEvent := range results {
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event, err := me.serializer.Deserialize(storedEvent.Data, storedEvent.TypeId)
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if err != nil {
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return nil, err
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}
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events = append(events, &data.Event{AggregateId: storedEvent.StreamId, Payload: event})
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}
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return events, nil
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}
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func (me ActionsHandler) RetrieveAll() ([]*data.Event, error) {
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results, err := me.storage.ReadAll()
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if err != nil {
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return nil, err
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}
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events := make([]*data.Event, 0)
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for _, storedEvent := range results {
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event, err := me.serializer.Deserialize(storedEvent.Data, storedEvent.TypeId)
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if err != nil {
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return nil, err
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}
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events = append(events, &data.Event{AggregateId: storedEvent.StreamId, Payload: event})
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}
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return events, nil
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}
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