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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package aggregate | ||
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| import ( | ||
| "context" | ||
| ) | ||
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| // NewExecutor creates a new executor for the given aggregate store. | ||
| func NewExecutor[T Rooter](store *Store[T]) Executor[T] { | ||
| return func(ctx context.Context, a T, f func(ctx context.Context) error) error { | ||
| return Exec(ctx, store, a, f) | ||
| } | ||
| } | ||
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| // Executor is a helper function to load an aggregate from the store, execute a function and save the aggregate back to the store. | ||
| type Executor[T Rooter] func(ctx context.Context, a T, f func(ctx context.Context) error) error | ||
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| // Exec is a helper function to load an aggregate from the store, execute a function and save the aggregate back to the store. | ||
| func Exec[T Rooter](ctx context.Context, store *Store[T], a T, f func(ctx context.Context) error) error { | ||
| err := store.ByID(ctx, a.StringID(), a) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| err = f(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| return store.Save(ctx, a) | ||
| } | ||
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| // TODO | ||
| // always start a transaction in s.AppendEvents if one not present in the context - if yes then use it | ||
| // this way we can ensure that all events are saved in a single transaction | ||
| // and in the case of multiple aggregates we can ensure that all aggregates are saved in a single transaction | ||
| // also then client need to wrap the call to s.AppendEvents in a transaction only if they want to save multiple aggregates in a single transaction |
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