feat: improve logging around db connections

...and also removed a log entry for the histogram

db/db.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"fmt"
+	"log"
 
 	"github.com/uc-cdis/cohort-middleware/config"
 	"github.com/uc-cdis/cohort-middleware/utils"
@@ -28,6 +29,7 @@ func Init() {
 		port)
 
 	dbSchema := c.GetString("atlas_db.schema")
+	log.Printf("connecting to main 'postgresql' db...")
 	db, _ := gorm.Open(postgres.New(
 		postgres.Config{
 			DSN:                  dsn,

utils/db.go

@@ -27,7 +27,7 @@ func GetDataSourceDB(sourceConnectionString string, dbSchema string) *DbAndSchem
 	dsn := GenerateDsn(sourceConnectionString)
 	dataSourceDb := new(DbAndSchema)
 	if strings.Contains(sourceConnectionString, "postgresql") {
-		log.Printf("trying to connect to 'postgresql' db...")
+		log.Printf("connecting to cohorts 'postgresql' db...")
 		// workaround for schema names in postgres (can't be uppercase):
 		dbSchema = strings.ToLower(dbSchema)
 		omopDataSource, _ := gorm.Open(postgres.Open(dsn),
@@ -38,6 +38,7 @@ func GetDataSourceDB(sourceConnectionString string, dbSchema string) *DbAndSchem
 				}})
 		dataSourceDb.Db = omopDataSource
 	} else {
+		log.Printf("connecting to cohorts 'sqlserver' db...")
 		omopDataSource, _ := gorm.Open(sqlserver.Open(dsn),
 			&gorm.Config{
 				NamingStrategy: schema.NamingStrategy{

utils/histogram.go

@@ -43,7 +43,6 @@ func GenerateHistogramData(conceptValues []float64) []HistogramColumn {
 
 	histogram := []HistogramColumn{}
 	for binIndex := 0; binIndex < numBins; binIndex++ {
-		log.Printf("here is the amount of people %v in bin %v", binIndexToHistogramColumn[binIndex].NumberOfPeople, binIndex)
 		histogram = append(histogram, binIndexToHistogramColumn[binIndex])
 	}