Resolve NXCALS-7480 "Fix empty datasets"

extraction-api-demo/src/main/java/cern/nxcals/api/extraction/data/demo/Application.java

@@ -4,10 +4,11 @@
 
 package cern.nxcals.api.extraction.data.demo;
 
-import cern.nxcals.api.backport.client.service.LHCFillDataService;
-import cern.nxcals.api.backport.client.service.ServiceBuilder;
 import cern.nxcals.api.config.SparkContext;
+import cern.nxcals.api.extraction.data.builders.DataQuery;
 import io.netty.util.internal.PlatformDependent;
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.Row;
 import org.apache.spark.sql.SparkSession;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -59,9 +60,17 @@ public class Application {
         ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
         SparkSession sparkSession = context.getBean(SparkSession.class);
 
-        LHCFillDataService fillDataService = ServiceBuilder.getInstance(sparkSession).createLHCFillService();
-
-        fillDataService.getLastCompletedLHCFillAndBeamModes();
+        Dataset<Row> dataset = DataQuery.builder(sparkSession)
+                .byEntities()
+                .system("MOCK-SYSTEM")
+                .startTime("2021-11-23 10:00:00.0")
+                .endTime("2021-11-23 10:00:59.999999999")
+                .entity().keyValue("device", "NXCALS_MONITORING_DEV1")
+                .build()
+                .where("`special-character`='test'")
+                .where("longField2 < 10000");
+
+        dataset.show();
 
         //        Random rand = new Random();
         //        ExecutorService executorService = Executors.newFixedThreadPool(5);