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write model

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This commit is contained in:
adlerhurst
2020-11-23 11:36:58 +01:00
parent 20f4fa56c5
commit 4aadd290f4
14 changed files with 151 additions and 92 deletions
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23
internal/eventstore/v2/write_model.go
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@@ -1,7 +1,7 @@
package eventstore
func NewReadModel() *ReadModel {
return &ReadModel{
func NewWriteModel() *WriteModel {
return &WriteModel{
Events: []EventReader{},
}
}
@@ -13,6 +13,7 @@ type WriteModel struct {
AggregateID string `json:"-"`
ProcessedSequence uint64 `json:"-"`
Events []EventReader `json:"-"`
ResourceOwner string `json:"-"`
}
//AppendEvents adds all the events to the read model.
@@ -24,22 +25,22 @@ func (rm *WriteModel) AppendEvents(events ...EventReader) *WriteModel {
//Reduce is the basic implementaion of reducer
// If this function is extended the extending function should be the last step
func (rm *WriteModel) Reduce() error {
if len(rm.Events) == 0 {
func (wm *WriteModel) Reduce() error {
if len(wm.Events) == 0 {
return nil
}
if rm.AggregateID == "" {
rm.AggregateID = rm.Events[0].AggregateID()
if wm.AggregateID == "" {
wm.AggregateID = wm.Events[0].AggregateID()
}
if rm.ResourceOwner == "" {
rm.ResourceOwner = rm.Events[0].ResourceOwner()
if wm.ResourceOwner == "" {
wm.ResourceOwner = wm.Events[0].ResourceOwner()
}
rm.ProcessedSequence = rm.Events[len(rm.Events)-1].Sequence()
wm.ProcessedSequence = wm.Events[len(wm.Events)-1].Sequence()
// all events processed and not needed anymore
rm.Events = nil
rm.Events = []EventReader{}
wm.Events = nil
wm.Events = []EventReader{}
return nil
}