Interface simplifications.

GetFingerprintsForLabelSet ([]*Fingerprint, error) ->
GetFingerprintsForLabelSet ([]Fingerprint, error)

rules/ast/persistence_adapter.go

@@ -37,7 +37,7 @@ func (p *PersistenceAdapter) getMetricsWithLabels(labels model.LabelSet) ([]*mod
 	}
 	metrics := []*model.Metric{}
 	for _, fingerprint := range fingerprints {
-		metric, err := p.persistence.GetMetricForFingerprint(*fingerprint)
+		metric, err := p.persistence.GetMetricForFingerprint(fingerprint)
 		if err != nil {
 			return nil, err
 		}

storage/metric/interface.go

@@ -34,7 +34,7 @@ type MetricPersistence interface {
 
 	// Get all of the metric fingerprints that are associated with the provided
 	// label set.
-	GetFingerprintsForLabelSet(model.LabelSet) ([]*model.Fingerprint, error)
+	GetFingerprintsForLabelSet(model.LabelSet) ([]model.Fingerprint, error)
 
 	// Get all of the metric fingerprints that are associated for a given label
 	// name.

storage/metric/leveldb/leveldb_test.go

@@ -887,7 +887,7 @@ func TestGetMetricForFingerprint(t *testing.T) {
 		t.Errorf("Expected one element.")
 	}
 
-	v, e := persistence.GetMetricForFingerprint(*result[0])
+	v, e := persistence.GetMetricForFingerprint(result[0])
 	if e != nil {
 		t.Error(e)
 	}
@@ -912,7 +912,7 @@ func TestGetMetricForFingerprint(t *testing.T) {
 		t.Errorf("Expected one element.")
 	}
 
-	v, e = persistence.GetMetricForFingerprint(*result[0])
+	v, e = persistence.GetMetricForFingerprint(result[0])
 
 	if e != nil {
 		t.Error(e)

storage/metric/leveldb/reading.go

@@ -180,7 +180,7 @@ func (l *LevelDBMetricPersistence) GetLabelNameFingerprints(n *dto.LabelName) (c
 	return
 }
 
-func (l *LevelDBMetricPersistence) GetFingerprintsForLabelSet(labelSet model.LabelSet) (fps []*model.Fingerprint, err error) {
+func (l *LevelDBMetricPersistence) GetFingerprintsForLabelSet(labelSet model.LabelSet) (fps []model.Fingerprint, err error) {
 	begin := time.Now()
 
 	defer func() {
@@ -222,10 +222,10 @@ func (l *LevelDBMetricPersistence) GetFingerprintsForLabelSet(labelSet model.Lab
 	for i := 1; i < numberOfSets; i++ {
 		base = base.Intersection(sets[i])
 	}
-	fps = []*model.Fingerprint{}
+	fps = []model.Fingerprint{}
 	for _, e := range base.Elements() {
 		fingerprint := e.(model.Fingerprint)
-		fps = append(fps, &fingerprint)
+		fps = append(fps, fingerprint)
 	}
 
 	return