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feat(eventstore): Precondition (#69)

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* start org

* refactor(eventstore): filter in sql for querier

* feat(eventstore): Aggregate precondition

preconditions are checked right before insert. Insert is still transaction save

* feat(eventstore): check preconditions in repository

* test(eventstore): test precondition in models

* test(eventstore): precondition-tests

* refactor(eventstore): querier as type

* fix(precondition): rename validation from precondition to validation

* test(eventstore): isErr func instead of wantErr bool

* fix: delete org files

* remove comment

Co-authored-by: Livio Amstutz <livio.a@gmail.com>
This commit is contained in:
Silvan
2020-04-28 16:01:00 +02:00
committed by GitHub
parent ff11cdba40
commit 33a4802425
10 changed files with 451 additions and 133 deletions
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23
internal/eventstore/models/aggregate.go
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@@ -15,15 +15,21 @@ func (at AggregateType) String() string {
type Aggregates []*Aggregate
type Aggregate struct {
id string
typ AggregateType
latestSequence uint64
version Version
id string
typ AggregateType
PreviousSequence uint64
version Version
editorService string
editorUser string
resourceOwner string
Events []*Event
Precondition *precondition
}
type precondition struct {
Query *SearchQuery
Validation func(...*Event) error
}
func (a *Aggregate) AppendEvent(typ EventType, payload interface{}) (*Aggregate, error) {
@@ -39,7 +45,6 @@ func (a *Aggregate) AppendEvent(typ EventType, payload interface{}) (*Aggregate,
CreationDate: time.Now(),
Data: data,
Type: typ,
PreviousSequence: a.latestSequence,
AggregateID: a.id,
AggregateType: a.typ,
AggregateVersion: a.version,
@@ -52,6 +57,11 @@ func (a *Aggregate) AppendEvent(typ EventType, payload interface{}) (*Aggregate,
return a, nil
}
func (a *Aggregate) SetPrecondition(query *SearchQuery, validateFunc func(...*Event) error) *Aggregate {
a.Precondition = &precondition{Query: query, Validation: validateFunc}
return a
}
func (a *Aggregate) Validate() error {
if a == nil {
return errors.ThrowPreconditionFailed(nil, "MODEL-yi5AC", "aggregate is nil")
@@ -75,6 +85,9 @@ func (a *Aggregate) Validate() error {
if a.resourceOwner == "" {
return errors.ThrowPreconditionFailed(nil, "MODEL-eBYUW", "resource owner not set")
}
if a.Precondition != nil && (a.Precondition.Query == nil || a.Precondition.Query.Validate() != nil || a.Precondition.Validation == nil) {
return errors.ThrowPreconditionFailed(nil, "MODEL-EEUvA", "invalid precondition")
}
return nil
}