Add estimated document count API

nb-adapters/adapter-dataapi/src/main/java/io/nosqlbench/adapter/dataapi/DataApiOpMapper.java

@@ -62,6 +62,8 @@ public OpDispenser<? extends DataApiBaseOp> apply(ParsedOp op) {
             case list_collections -> new DataApiListCollectionsOpDispenser(adapter, op, typeAndTarget.targetFunction);
             case list_collection_names ->
                 new DataApiListCollectionNamesOpDispenser(adapter, op, typeAndTarget.targetFunction);
+            case estimated_document_count ->
+                new DataApiEstimatedDocumentCountOpDispenser(adapter, op, typeAndTarget.targetFunction);
         };
     }
 }

nb-adapters/adapter-dataapi/src/main/java/io/nosqlbench/adapter/dataapi/opdispensers/DataApiEstimatedDocumentCountOpDispenser.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2020-2024 nosqlbench
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.nosqlbench.adapter.dataapi.opdispensers;
+
+import io.nosqlbench.adapter.dataapi.DataApiDriverAdapter;
+import io.nosqlbench.adapter.dataapi.ops.DataApiBaseOp;
+import io.nosqlbench.adapter.dataapi.ops.DataApiEstimatedDocumentCountOp;
+import io.nosqlbench.adapters.api.templating.ParsedOp;
+
+import java.util.function.LongFunction;
+
+public class DataApiEstimatedDocumentCountOpDispenser extends DataApiOpDispenser {
+    private final LongFunction<DataApiEstimatedDocumentCountOp> opFunction;
+    public DataApiEstimatedDocumentCountOpDispenser(
+        DataApiDriverAdapter adapter, ParsedOp op, LongFunction<String> targetFunction) {
+        super(adapter, op, targetFunction);
+        this.opFunction = createOpFunction(op);
+    }
+
+    private LongFunction<DataApiEstimatedDocumentCountOp> createOpFunction(ParsedOp op) {
+        return (l) -> {
+            return new DataApiEstimatedDocumentCountOp(
+                spaceFunction.apply(l).getDatabase(),
+                targetFunction.apply(l)
+            );
+        };
+    }
+
+    @Override
+    public DataApiBaseOp getOp(long value) {
+        return opFunction.apply(value);
+    }
+}

nb-adapters/adapter-dataapi/src/main/java/io/nosqlbench/adapter/dataapi/opdispensers/DataApiListCollectionsOpDispenser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 nosqlbench
+ * Copyright (c) 2020-2024 nosqlbench
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

nb-adapters/adapter-dataapi/src/main/java/io/nosqlbench/adapter/dataapi/ops/DataApiEstimatedDocumentCountOp.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2020-2024 nosqlbench
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.nosqlbench.adapter.dataapi.ops;
+
+import com.datastax.astra.client.Collection;
+import com.datastax.astra.client.Database;
+import com.datastax.astra.client.model.Document;
+
+public class DataApiEstimatedDocumentCountOp extends DataApiBaseOp {
+    private final String collectionName;
+    public DataApiEstimatedDocumentCountOp(Database db, String collectionName) {
+        super(db);
+        this.collectionName = collectionName;
+    }
+
+    @Override
+    public Object apply(long value) {
+        long response;
+        Collection<Document> collection = db.getCollection(collectionName);
+        response = collection.estimatedDocumentCount();
+        return response;
+    }
+}

nb-adapters/adapter-dataapi/src/main/java/io/nosqlbench/adapter/dataapi/ops/DataApiOpType.java

@@ -34,4 +34,5 @@ public enum DataApiOpType {
     delete_collection,
     list_collections,
     list_collection_names,
+    estimated_document_count,
 }

nb-adapters/adapter-dataapi/src/main/resources/activities/estimated_document_count.yaml

@@ -0,0 +1,9 @@
+scenarios:
+  default:
+    estimated_document_count: run driver=dataapi tags==blocks:estimated_document_count cycles=1
+
+blocks:
+  estimated_document_count:
+    ops:
+      op1:
+        estimated_document_count: "collectionName"

nb-adapters/adapter-dataapi/src/main/resources/activities/list_collection_names.yaml

@@ -6,3 +6,4 @@ blocks:
   list_collection_names:
     ops:
       op1:
+        list_collection_names:

nb-adapters/adapter-dataapi/src/main/resources/activities/list_collections.yaml

@@ -6,3 +6,4 @@ blocks:
   list_collections:
     ops:
       op1:
+        list_collections: