mirror of https://github.com/dapr/quickstarts.git
120 lines
2.6 KiB
Go
120 lines
2.6 KiB
Go
/*
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Copyright 2021 The Dapr Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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/*
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dapr run --app-id batch-sdk --app-port 6002 --dapr-http-port 3502 --dapr-grpc-port 60002 --resources-path ../../../components -- go run .
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*/
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"strconv"
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dapr "github.com/dapr/go-sdk/client"
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"github.com/gorilla/mux"
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)
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var (
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cronBindingName, sqlBindingName string = "cron", "sqldb"
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)
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type Orders struct {
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Orders []Order `json:"orders"`
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}
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type Order struct {
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OrderId int `json:"orderid"`
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Customer string `json:"customer"`
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Price float64 `json:"price"`
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}
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func processBatch(w http.ResponseWriter, r *http.Request) {
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fmt.Println("Processing batch...")
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fileContent, err := os.Open("../../../orders.json")
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if err != nil {
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log.Fatal(err)
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return
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}
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defer fileContent.Close()
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byteResult, _ := io.ReadAll(fileContent)
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var orders Orders
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json.Unmarshal(byteResult, &orders)
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for i := 0; i < len(orders.Orders); i++ {
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err := sqlOutput(orders.Orders[i])
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if err != nil {
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log.Fatal(err)
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os.Exit(1)
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}
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}
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fmt.Println("Finished processing batch")
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}
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func sqlOutput(order Order) (err error) {
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client, err := dapr.NewClient()
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if err != nil {
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return err
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}
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ctx := context.Background()
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sqlCmd := fmt.Sprintf("insert into orders (orderid, customer, price) values (%d, '%s', %s);", order.OrderId, order.Customer, strconv.FormatFloat(order.Price, 'f', 2, 64))
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fmt.Println(sqlCmd)
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// Insert order using Dapr output binding via Dapr SDK
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in := &dapr.InvokeBindingRequest{
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Name: sqlBindingName,
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Operation: "exec",
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Data: []byte(""),
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Metadata: map[string]string{"sql": sqlCmd},
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}
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err = client.InvokeOutputBinding(ctx, in)
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if err != nil {
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return err
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}
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return nil
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}
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func main() {
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var appPort string
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var okHost bool
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if appPort, okHost = os.LookupEnv("APP_PORT"); !okHost {
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appPort = "6004"
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}
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r := mux.NewRouter()
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// Triggered by Dapr input binding
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r.HandleFunc("/"+cronBindingName, processBatch).Methods("POST")
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if err := http.ListenAndServe(":"+appPort, r); err != nil {
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log.Panic(err)
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}
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}
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