1 回答
TA贡献1851条经验 获得超4个赞
根据文档,全局变量独立于您的 Lambda 函数的处理程序代码。这导致缓冲区随着时间的推移而增加。
纠正后的参考粘贴在下面。
package main
import (
"context"
"fmt"
"os"
"sync"
"github.com/aws/aws-lambda-go/lambda"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/dynamodb"
"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
)
func exitWithError(err error) {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
//HandleRequest : Lambda entry point
func HandleRequest(ctx context.Context, data LambdaInputJSON) ([]interface{}, error) {
output := DynamoDBBatchGetRecords(data)
return output, nil
}
func main() {
lambda.Start(HandleRequest)
}
func DynamoDBBatchGetRecords(a LambdaInputJSON) []interface{} {
var dataOut []interface{}
var wg = &sync.WaitGroup{}
var mtx = &sync.Mutex{}
iterations := len(a.Ids)
wg.Add(iterations)
for i := 0; i < i; i++ {
go func(i int) {
defer wg.Done()
var outputData []interface{}
sess, err := session.NewSession(&aws.Config{
Region: aws.String("aws-region"),
})
if err != nil {
exitWithError(fmt.Errorf("failed to make Query API call, %v", err))
}
ddb := dynamodb.New(sess)
queryInput := &dynamodb.QueryInput{
Limit: aws.Int64(1),
TableName: aws.String("table"),
IndexName: aws.String("index"),
ScanIndexForward: aws.Bool(false),
ConsistentRead: aws.Bool(false),
KeyConditions: map[string]*dynamodb.Condition{
"index-column": {
ComparisonOperator: aws.String("EQ"),
AttributeValueList: []*dynamodb.AttributeValue{
{
S: aws.String(a.Ids[i]),
},
},
},
},
}
output, err := ddb.Query(queryInput)
if err != nil {
exitWithError(fmt.Errorf("E1 failed to make Query API call, %v", err))
}
err = dynamodbattribute.UnmarshalListOfMaps(output.Items, &outputData)
if err != nil {
exitWithError(fmt.Errorf("E2 failed to unmarshal Query result items, %v", err))
}
mtx.Lock()
dataOut = append(dataOut, outputData[0])
mtx.Unlock()
}(i)
}
wg.Wait()
return dataOut
}
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