Add example for pinot client with config and http client

examples/pinot-client-with-config-and-http-client/main.go

@@ -0,0 +1,101 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"time"
+
+	pinot "github.com/startreedata/pinot-client-go/pinot"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func connectPinot() *pinot.Connection {
+	httpClient := &http.Client{
+		Timeout: 15 * time.Second,
+		Transport: &http.Transport{
+			MaxIdleConns:        100, // Max idle connections in total
+			MaxIdleConnsPerHost: 10,  // Max idle connections per host
+			IdleConnTimeout:     90 * time.Second,
+			DialContext: (&net.Dialer{
+				Timeout:   30 * time.Second,
+				KeepAlive: 30 * time.Second,
+			}).DialContext,
+			// You may add other settings like TLS configuration, Proxy, etc.
+		},
+	}
+	pinotClient, err := pinot.NewWithConfigAndClient(&pinot.ClientConfig{
+		BrokerList:  []string{"https://broker.pinot.myorg.mycompany.startree.cloud"},
+		HTTPTimeout: 1500 * time.Millisecond,
+		ExtraHTTPHeader: map[string]string{
+			"authorization": "Basic <API-TOKEN>",
+		},
+	}, httpClient)
+
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	if pinotClient != nil {
+		log.Infof("Successfully established connection with Pinot Server!")
+	}
+	return pinotClient
+}
+
+func main() {
+	pinotClient := connectPinot()
+
+	table := "airlineStats"
+
+	pinotQueries := []string{
+		"select count(*) as cnt from airlineStats limit 1",
+	}
+
+	log.Printf("Querying SQL")
+	for _, query := range pinotQueries {
+		log.Printf("Trying to query Pinot: %v\n", query)
+		brokerResp, err := pinotClient.ExecuteSQL(table, query)
+		if err != nil {
+			log.Fatalln(err)
+		}
+		printBrokerResp(brokerResp)
+	}
+}
+
+func printBrokerResp(brokerResp *pinot.BrokerResponse) {
+	log.Infof("Query Stats: response time - %d ms, scanned docs - %d, total docs - %d", brokerResp.TimeUsedMs, brokerResp.NumDocsScanned, brokerResp.TotalDocs)
+	if brokerResp.Exceptions != nil && len(brokerResp.Exceptions) > 0 {
+		jsonBytes, _ := json.Marshal(brokerResp.Exceptions)
+		log.Infof("brokerResp.Exceptions:\n%s\n", jsonBytes)
+		return
+	}
+	if brokerResp.ResultTable != nil {
+		jsonBytes, _ := json.Marshal(brokerResp.ResultTable)
+		log.Infof("brokerResp.ResultTable:\n%s\n", jsonBytes)
+		line := ""
+		for c := 0; c < brokerResp.ResultTable.GetColumnCount(); c++ {
+			line += fmt.Sprintf("%s(%s)\t", brokerResp.ResultTable.GetColumnName(c), brokerResp.ResultTable.GetColumnDataType(c))
+		}
+		line += "\n"
+		for r := 0; r < brokerResp.ResultTable.GetRowCount(); r++ {
+			for c := 0; c < brokerResp.ResultTable.GetColumnCount(); c++ {
+				line += fmt.Sprintf("%v\t", brokerResp.ResultTable.Get(r, c))
+			}
+			line += "\n"
+		}
+		log.Infof("ResultTable:\n%s", line)
+		return
+	}
+	if brokerResp.AggregationResults != nil {
+		jsonBytes, _ := json.Marshal(brokerResp.AggregationResults)
+		log.Infof("brokerResp.AggregationResults:\n%s\n", jsonBytes)
+		return
+	}
+	if brokerResp.SelectionResults != nil {
+		jsonBytes, _ := json.Marshal(brokerResp.SelectionResults)
+		log.Infof("brokerResp.SelectionResults:\n%s\n", jsonBytes)
+		return
+	}
+}