mirror of
https://github.com/zitadel/zitadel.git
synced 2024-12-14 20:08:02 +00:00
b5564572bc
This implementation increases parallel write capabilities of the eventstore. Please have a look at the technical advisories: [05](https://zitadel.com/docs/support/advisory/a10005) and [06](https://zitadel.com/docs/support/advisory/a10006). The implementation of eventstore.push is rewritten and stored events are migrated to a new table `eventstore.events2`. If you are using cockroach: make sure that the database user of ZITADEL has `VIEWACTIVITY` grant. This is used to query events.
51 lines
1.4 KiB
Go
51 lines
1.4 KiB
Go
package eventstore
|
|
|
|
import "time"
|
|
|
|
// ReadModel is the minimum representation of a read model.
|
|
// It implements a basic reducer
|
|
// it might be saved in a database or in memory
|
|
type ReadModel struct {
|
|
AggregateID string `json:"-"`
|
|
ProcessedSequence uint64 `json:"-"`
|
|
CreationDate time.Time `json:"-"`
|
|
ChangeDate time.Time `json:"-"`
|
|
Events []Event `json:"-"`
|
|
ResourceOwner string `json:"-"`
|
|
InstanceID string `json:"-"`
|
|
}
|
|
|
|
// AppendEvents adds all the events to the read model.
|
|
// The function doesn't compute the new state of the read model
|
|
func (rm *ReadModel) AppendEvents(events ...Event) {
|
|
rm.Events = append(rm.Events, events...)
|
|
}
|
|
|
|
// Reduce is the basic implementation of reducer
|
|
// If this function is extended the extending function should be the last step
|
|
func (rm *ReadModel) Reduce() error {
|
|
if len(rm.Events) == 0 {
|
|
return nil
|
|
}
|
|
|
|
if rm.AggregateID == "" {
|
|
rm.AggregateID = rm.Events[0].Aggregate().ID
|
|
}
|
|
if rm.ResourceOwner == "" {
|
|
rm.ResourceOwner = rm.Events[0].Aggregate().ResourceOwner
|
|
}
|
|
if rm.InstanceID == "" {
|
|
rm.InstanceID = rm.Events[0].Aggregate().InstanceID
|
|
}
|
|
|
|
if rm.CreationDate.IsZero() {
|
|
rm.CreationDate = rm.Events[0].CreatedAt()
|
|
}
|
|
rm.ChangeDate = rm.Events[len(rm.Events)-1].CreatedAt()
|
|
rm.ProcessedSequence = rm.Events[len(rm.Events)-1].Sequence()
|
|
// all events processed and not needed anymore
|
|
rm.Events = nil
|
|
rm.Events = []Event{}
|
|
return nil
|
|
}
|