124 lines
3.4 KiB
Go
124 lines
3.4 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 dynamodb
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import (
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"context"
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"encoding/json"
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"reflect"
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"github.com/aws/aws-sdk-go/aws"
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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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awsAuth "github.com/dapr/components-contrib/common/authentication/aws"
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"github.com/dapr/components-contrib/metadata"
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"github.com/dapr/kit/logger"
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kitmd "github.com/dapr/kit/metadata"
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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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logger logger.Logger
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}
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type dynamoDBMetadata struct {
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Region string `json:"region" mapstructure:"region"`
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Endpoint string `json:"endpoint" mapstructure:"endpoint"`
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AccessKey string `json:"accessKey" mapstructure:"accessKey"`
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SecretKey string `json:"secretKey" mapstructure:"secretKey"`
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SessionToken string `json:"sessionToken" mapstructure:"sessionToken"`
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Table string `json:"table" mapstructure:"table"`
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}
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// NewDynamoDB returns a new DynamoDB instance.
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func NewDynamoDB(logger logger.Logger) bindings.OutputBinding {
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return &DynamoDB{logger: logger}
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}
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// Init performs connection parsing for DynamoDB.
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func (d *DynamoDB) Init(_ context.Context, 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) Operations() []bindings.OperationKind {
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return []bindings.OperationKind{bindings.CreateOperation}
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}
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func (d *DynamoDB) Invoke(ctx context.Context, req *bindings.InvokeRequest) (*bindings.InvokeResponse, 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 nil, 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 nil, err
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}
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_, err = d.client.PutItemWithContext(ctx, &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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if err != nil {
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return nil, err
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}
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return nil, nil
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}
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func (d *DynamoDB) getDynamoDBMetadata(spec bindings.Metadata) (*dynamoDBMetadata, error) {
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var meta dynamoDBMetadata
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err := kitmd.DecodeMetadata(spec.Properties, &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(metadata *dynamoDBMetadata) (*dynamodb.DynamoDB, error) {
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sess, err := awsAuth.GetClient(metadata.AccessKey, metadata.SecretKey, metadata.SessionToken, metadata.Region, metadata.Endpoint)
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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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// GetComponentMetadata returns the metadata of the component.
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func (d *DynamoDB) GetComponentMetadata() (metadataInfo metadata.MetadataMap) {
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metadataStruct := dynamoDBMetadata{}
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metadata.GetMetadataInfoFromStructType(reflect.TypeOf(metadataStruct), &metadataInfo, metadata.BindingType)
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return
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}
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