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b522588d98
# Which Problems Are Solved Float64 which was used for the event.Position field is [not precise in go and gets rounded](https://github.com/golang/go/issues/47300). This can lead to unprecies position tracking of events and therefore projections especially on cockcoachdb as the position used there is a big number. example of a unprecies position: exact: 1725257931223002628 float64: 1725257931223002624.000000 # How the Problems Are Solved The float64 was replaced by [github.com/jackc/pgx-shopspring-decimal](https://github.com/jackc/pgx-shopspring-decimal). # Additional Changes Correct behaviour of makefile for load tests. Rename `latestSequence`-queries to `latestPosition`
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package readmodel
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import (
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"github.com/shopspring/decimal"
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"github.com/zitadel/zitadel/internal/v2/eventstore"
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"github.com/zitadel/zitadel/internal/v2/system"
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"github.com/zitadel/zitadel/internal/v2/system/mirror"
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)
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type LastSuccessfulMirror struct {
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ID string
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Position decimal.Decimal
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source string
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}
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func NewLastSuccessfulMirror(source string) *LastSuccessfulMirror {
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return &LastSuccessfulMirror{
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source: source,
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}
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}
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var _ eventstore.Reducer = (*LastSuccessfulMirror)(nil)
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func (p *LastSuccessfulMirror) Filter() *eventstore.Filter {
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return eventstore.NewFilter(
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eventstore.AppendAggregateFilter(
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system.AggregateType,
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eventstore.AggregateOwnersEqual(system.AggregateOwner),
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eventstore.AppendEvent(
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eventstore.SetEventTypes(
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mirror.SucceededType,
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),
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eventstore.EventCreatorsEqual(mirror.Creator),
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),
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),
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eventstore.FilterPagination(
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eventstore.Descending(),
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),
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)
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}
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// Reduce implements eventstore.Reducer.
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func (h *LastSuccessfulMirror) Reduce(events ...*eventstore.StorageEvent) (err error) {
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for _, event := range events {
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if event.Type == mirror.SucceededType {
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err = h.reduceSucceeded(event)
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}
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if err != nil {
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return err
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}
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}
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return nil
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}
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func (h *LastSuccessfulMirror) reduceSucceeded(event *eventstore.StorageEvent) error {
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// if position is set we skip all older events
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if h.Position.GreaterThan(decimal.NewFromInt(0)) {
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return nil
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}
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succeededEvent, err := mirror.SucceededEventFromStorage(event)
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if err != nil {
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return err
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}
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if h.source != succeededEvent.Payload.Source {
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return nil
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}
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h.Position = succeededEvent.Payload.Position
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return nil
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}
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