diff --git a/persistence/IdentifiableMongoDbPersistence.go b/persistence/IdentifiableMongoDbPersistence.go
index 04b726e..c69bf31 100644
--- a/persistence/IdentifiableMongoDbPersistence.go
+++ b/persistence/IdentifiableMongoDbPersistence.go
@@ -592,3 +592,22 @@ func (c *IdentifiableMongoDbPersistence) GetConvResult(docPointer reflect.Value,
 	}
 	return item
 }
+
+// GetCountByFilter is gets a count of data items retrieved by a given filter.
+// This method shall be called by a func (c *IdentifiableMongoDbPersistence) GetCountByFilter method from child type that
+// receives FilterParams and converts them into a filter function.
+// Parameters:
+// 	- correlationId  string
+//   (optional) transaction id to Trace execution through call chain.
+//  - filter interface{}
+// Returns count int, err error
+// a data count or error, if they are occured
+func (c *IdentifiableMongoDbPersistence) GetCountByFilter(correlationId string, filter interface{}) (count int64, err error) {
+
+	// Configure options
+	var options mngoptions.CountOptions
+	count = 0
+	count, err = c.Collection.CountDocuments(c.Connection.Ctx, filter, &options)
+	c.Logger.Trace(correlationId, "Find %d items in %s", count, c.CollectionName)
+	return count, err
+}
diff --git a/test/persistence/DummyMapMongoDbPersistence.go b/test/persistence/DummyMapMongoDbPersistence.go
index 01925a4..8a699ce 100644
--- a/test/persistence/DummyMapMongoDbPersistence.go
+++ b/test/persistence/DummyMapMongoDbPersistence.go
@@ -8,8 +8,6 @@ import (
 	"go.mongodb.org/mongo-driver/bson"
 )
 
-// extends IdentifiableMongoDbPersistence<DummyMap, string>
-// implements IDummyMapPersistence {
 type DummyMapMongoDbPersistence struct {
 	mngpersist.IdentifiableMongoDbPersistence
 }
@@ -116,3 +114,19 @@ func (c *DummyMapMongoDbPersistence) GetPageByFilter(correlationId string, filte
 	dataPage := NewMapPage(&dataLen, data)
 	return dataPage, err
 }
+
+func (c *DummyMapMongoDbPersistence) GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error) {
+
+	if &filter == nil {
+		filter = cdata.NewEmptyFilterParams()
+	}
+
+	key := filter.GetAsNullableString("Key")
+	var filterObj bson.M
+	if *key != "" {
+		filterObj = bson.M{"key": *key}
+	} else {
+		filterObj = bson.M{}
+	}
+	return c.IdentifiableMongoDbPersistence.GetCountByFilter(correlationId, filterObj)
+}
diff --git a/test/persistence/DummyMongoDbPersistence.go b/test/persistence/DummyMongoDbPersistence.go
index 3f840a2..035972f 100644
--- a/test/persistence/DummyMongoDbPersistence.go
+++ b/test/persistence/DummyMongoDbPersistence.go
@@ -115,3 +115,19 @@ func (c *DummyMongoDbPersistence) GetPageByFilter(correlationId string, filter *
 	page = NewDummyPage(&dataLen, data)
 	return page, err
 }
+
+func (c *DummyMongoDbPersistence) GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error) {
+
+	if &filter == nil {
+		filter = cdata.NewEmptyFilterParams()
+	}
+
+	key := filter.GetAsNullableString("Key")
+	var filterObj bson.M
+	if *key != "" {
+		filterObj = bson.M{"key": *key}
+	} else {
+		filterObj = bson.M{}
+	}
+	return c.IdentifiableMongoDbPersistence.GetCountByFilter(correlationId, filterObj)
+}
diff --git a/test/persistence/DummyRefMongoDbPersistence.go b/test/persistence/DummyRefMongoDbPersistence.go
index ae3e310..3948ffb 100644
--- a/test/persistence/DummyRefMongoDbPersistence.go
+++ b/test/persistence/DummyRefMongoDbPersistence.go
@@ -116,3 +116,19 @@ func (c *DummyRefMongoDbPersistence) GetPageByFilter(correlationId string, filte
 	page = NewDummyRefPage(&dataLen, data)
 	return page, err
 }
+
+func (c *DummyRefMongoDbPersistence) GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error) {
+
+	if &filter == nil {
+		filter = cdata.NewEmptyFilterParams()
+	}
+
+	key := filter.GetAsNullableString("Key")
+	var filterObj bson.M
+	if *key != "" {
+		filterObj = bson.M{"key": *key}
+	} else {
+		filterObj = bson.M{}
+	}
+	return c.IdentifiableMongoDbPersistence.GetCountByFilter(correlationId, filterObj)
+}
diff --git a/test/persistence/IDummyMapPersistence.go b/test/persistence/IDummyMapPersistence.go
index a83d99c..8f881e3 100644
--- a/test/persistence/IDummyMapPersistence.go
+++ b/test/persistence/IDummyMapPersistence.go
@@ -12,4 +12,5 @@ type IDummyMapPersistence interface {
 	UpdatePartially(correlationId string, id string, data *cdata.AnyValueMap) (item map[string]interface{}, err error)
 	DeleteById(correlationId string, id string) (item map[string]interface{}, err error)
 	DeleteByIds(correlationId string, ids []string) (err error)
+	GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error)
 }
diff --git a/test/persistence/IDummyPersistence.go b/test/persistence/IDummyPersistence.go
index 3441f9f..15942f7 100644
--- a/test/persistence/IDummyPersistence.go
+++ b/test/persistence/IDummyPersistence.go
@@ -12,4 +12,5 @@ type IDummyPersistence interface {
 	UpdatePartially(correlationId string, id string, data *cdata.AnyValueMap) (item Dummy, err error)
 	DeleteById(correlationId string, id string) (item Dummy, err error)
 	DeleteByIds(correlationId string, ids []string) (err error)
+	GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error)
 }
diff --git a/test/persistence/IDummyRefPersistence.go b/test/persistence/IDummyRefPersistence.go
index 93073dc..ec282f0 100644
--- a/test/persistence/IDummyRefPersistence.go
+++ b/test/persistence/IDummyRefPersistence.go
@@ -12,4 +12,5 @@ type IDummyRefPersistence interface {
 	UpdatePartially(correlationId string, id string, data *cdata.AnyValueMap) (item *Dummy, err error)
 	DeleteById(correlationId string, id string) (item *Dummy, err error)
 	DeleteByIds(correlationId string, ids []string) (err error)
+	GetCountByFilter(correlationId string, filter *cdata.FilterParams) (count int64, err error)
 }