state: convert checks.service index to new pattern

agent/consul/state/catalog.go

@@ -1638,8 +1638,11 @@ func (s *Store) ServiceChecks(ws memdb.WatchSet, serviceName string, entMeta *st
 	// Get the table index.
 	idx := catalogChecksMaxIndex(tx, entMeta)
 
-	// Return the checks.
-	iter, err := catalogListChecksByService(tx, serviceName, entMeta)
+	if entMeta == nil {
+		entMeta = structs.DefaultEnterpriseMeta()
+	}
+	q := Query{Value: serviceName, EnterpriseMeta: *entMeta}
+	iter, err := tx.Get(tableChecks, indexService, q)
 	if err != nil {
 		return 0, nil, fmt.Errorf("failed check lookup: %s", err)
 	}
@@ -1663,8 +1666,12 @@ func (s *Store) ServiceChecksByNodeMeta(ws memdb.WatchSet, serviceName string,
 
 	// Get the table index.
 	idx := maxIndexForService(tx, serviceName, true, true, entMeta)
-	// Return the checks.
-	iter, err := catalogListChecksByService(tx, serviceName, entMeta)
+
+	if entMeta == nil {
+		entMeta = structs.DefaultEnterpriseMeta()
+	}
+	q := Query{Value: serviceName, EnterpriseMeta: *entMeta}
+	iter, err := tx.Get(tableChecks, indexService, q)
 	if err != nil {
 		return 0, nil, fmt.Errorf("failed check lookup: %s", err)
 	}

agent/consul/state/catalog_oss.go

@@ -135,10 +135,6 @@ func catalogListChecksByNode(tx ReadTxn, q Query) (memdb.ResultIterator, error)
 	return tx.Get(tableChecks, indexNode, q)
 }
 
-func catalogListChecksByService(tx ReadTxn, service string, _ *structs.EnterpriseMeta) (memdb.ResultIterator, error) {
-	return tx.Get(tableChecks, indexService, service)
-}
-
 func catalogInsertCheck(tx WriteTxn, chk *structs.HealthCheck, idx uint64) error {
 	// Insert the check
 	if err := tx.Insert(tableChecks, chk); err != nil {

agent/consul/state/catalog_oss_test.go

@@ -50,9 +50,7 @@ func testIndexerTableChecks() map[string]indexerTestCase {
 		},
 		indexService: {
 			read: indexValue{
-				source: []interface{}{
-					"ServiceName",
-				},
+				source:   Query{Value: "ServiceName"},
 				expected: []byte("servicename\x00"),
 			},
 			write: indexValue{

agent/consul/state/catalog_schema.go

@@ -267,9 +267,9 @@ func checksTableSchema() *memdb.TableSchema {
 				Name:         indexService,
 				AllowMissing: true,
 				Unique:       false,
-				Indexer: &memdb.StringFieldIndex{
-					Field:     "ServiceName",
-					Lowercase: true,
+				Indexer: indexerSingle{
+					readIndex:  indexFromQuery,
+					writeIndex: indexServiceNameFromHealthCheck,
 				},
 			},
 			indexNode: {
@@ -357,6 +357,21 @@ func indexStatusFromHealthCheck(raw interface{}) ([]byte, error) {
 	return b.Bytes(), nil
 }
 
+func indexServiceNameFromHealthCheck(raw interface{}) ([]byte, error) {
+	hc, ok := raw.(*structs.HealthCheck)
+	if !ok {
+		return nil, fmt.Errorf("unexpected type %T for structs.HealthCheck index", raw)
+	}
+
+	if hc.ServiceName == "" {
+		return nil, errMissingValueForIndex
+	}
+
+	var b indexBuilder
+	b.String(strings.ToLower(hc.ServiceName))
+	return b.Bytes(), nil
+}
+
 //  gatewayServicesTableSchema returns a new table schema used to store information
 // about services associated with terminating gateways.
 func gatewayServicesTableSchema() *memdb.TableSchema {