feat: enable handling projections for inactive instances (#5523)

* fix: don't ignore failed events in handlers

* question

* fix retries

* don't instance ids query

* statements can be nil

* make unit tests pass

* add comments

* spool only active instances

* feat(config): handle inactive instances

* customizable HandleInactiveInstances

* test: handling with and w/o inactive instances

* docs: describe projection options

* enable global handling of inactive instances

* accept NowFunc, not Clock interface

* add comment about stringer usage

* remove enum stringer implementations

* fix enum format types

* Update internal/eventstore/repository/mock/repository.mock.impl.go

Co-authored-by: Silvan <silvan.reusser@gmail.com>

---------

Co-authored-by: Silvan <silvan.reusser@gmail.com>

internal/query/projection/config.go

@@ -5,19 +5,20 @@ import (
 )
 
 type Config struct {
-	RequeueEvery        time.Duration
-	RetryFailedAfter    time.Duration
-	MaxFailureCount     uint
-	ConcurrentInstances uint
-	BulkLimit           uint64
-	Customizations      map[string]CustomConfig
-	MaxIterators        int
+	RequeueEvery            time.Duration
+	RetryFailedAfter        time.Duration
+	MaxFailureCount         uint
+	ConcurrentInstances     uint
+	BulkLimit               uint64
+	Customizations          map[string]CustomConfig
+	HandleInactiveInstances bool
 }
 
 type CustomConfig struct {
-	RequeueEvery        *time.Duration
-	RetryFailedAfter    *time.Duration
-	MaxFailureCount     *uint
-	ConcurrentInstances *uint
-	BulkLimit           *uint64
+	RequeueEvery            *time.Duration
+	RetryFailedAfter        *time.Duration
+	MaxFailureCount         *uint
+	ConcurrentInstances     *uint
+	BulkLimit               *uint64
+	HandleInactiveInstances *bool
 }

internal/query/projection/projection.go

@@ -80,10 +80,11 @@ func Create(ctx context.Context, sqlClient *database.DB, es *eventstore.Eventsto
 			HandlerConfig: handler.HandlerConfig{
 				Eventstore: es,
 			},
-			RequeueEvery:        config.RequeueEvery,
-			RetryFailedAfter:    config.RetryFailedAfter,
-			Retries:             config.MaxFailureCount,
-			ConcurrentInstances: config.ConcurrentInstances,
+			RequeueEvery:            config.RequeueEvery,
+			RetryFailedAfter:        config.RetryFailedAfter,
+			Retries:                 config.MaxFailureCount,
+			ConcurrentInstances:     config.ConcurrentInstances,
+			HandleInactiveInstances: config.HandleInactiveInstances,
 		},
 		Client:            sqlClient,
 		SequenceTable:     CurrentSeqTable,
@@ -173,6 +174,9 @@ func applyCustomConfig(config crdb.StatementHandlerConfig, customConfig CustomCo
 	if customConfig.RetryFailedAfter != nil {
 		config.RetryFailedAfter = *customConfig.RetryFailedAfter
 	}
+	if customConfig.HandleInactiveInstances != nil {
+		config.HandleInactiveInstances = *customConfig.HandleInactiveInstances
+	}
 
 	return config
 }