106 lines
2.2 KiB
Go
106 lines
2.2 KiB
Go
// ------------------------------------------------------------
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// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT License.
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// ------------------------------------------------------------
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package dynamodb
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import (
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"encoding/json"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/dynamodb"
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"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
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"github.com/dapr/components-contrib/bindings"
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)
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//DynamoDB allows performing stateful operations on AWS DynamoDB
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type DynamoDB struct {
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client *dynamodb.DynamoDB
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table string
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}
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type dynamoDBMetadata struct {
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Region string `json:"region"`
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AccessKey string `json:"accessKey"`
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SecretKey string `json:"secretKey"`
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Table string `json:"table"`
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}
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// NewDynamoDB returns a new DynamoDB instance
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func NewDynamoDB() *DynamoDB {
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return &DynamoDB{}
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}
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// Init performs connection parsing for DynamoDB
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func (d *DynamoDB) Init(metadata bindings.Metadata) error {
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meta, err := d.getDynamoDBMetadata(metadata)
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if err != nil {
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return err
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}
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client, err := d.getClient(meta)
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if err != nil {
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return err
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}
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d.client = client
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d.table = meta.Table
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return nil
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}
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func (d *DynamoDB) Write(req *bindings.WriteRequest) error {
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var obj interface{}
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err := json.Unmarshal(req.Data, &obj)
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if err != nil {
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return err
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}
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item, err := dynamodbattribute.MarshalMap(obj)
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if err != nil {
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return err
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}
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input := &dynamodb.PutItemInput{
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Item: item,
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TableName: aws.String(d.table),
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}
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_, err = d.client.PutItem(input)
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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 (d *DynamoDB) getDynamoDBMetadata(spec bindings.Metadata) (*dynamoDBMetadata, error) {
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b, err := json.Marshal(spec.Properties)
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if err != nil {
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return nil, err
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}
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var meta dynamoDBMetadata
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err = json.Unmarshal(b, &meta)
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if err != nil {
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return nil, err
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}
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return &meta, nil
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}
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func (d *DynamoDB) getClient(meta *dynamoDBMetadata) (*dynamodb.DynamoDB, error) {
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sess, err := session.NewSession(&aws.Config{
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Region: aws.String(meta.Region),
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Credentials: credentials.NewStaticCredentials(meta.AccessKey, meta.SecretKey, ""),
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})
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if err != nil {
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return nil, err
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}
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c := dynamodb.New(sess)
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return c, nil
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}
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