dynamodb

Documentation

Overview

Package dynamodb contains an implementation of the `gokv.Store` interface for Amazon DynamoDB.

Index

• Variables
• type Client
  • func NewClient(options Options) (Client, error)
  • func (c Client) Close() error
  • func (c Client) Delete(k string) error
  • func (c Client) Get(k string, v interface{}) (found bool, err error)
  • func (c Client) Set(k string, v interface{}) error
• type Options

Variables

var DefaultOptions = Options{
	Codec: encoding.JSON,
}

DefaultOptions is an Options object with default values. Region: "" (use shared config file or environment variable), TableName: "gokv", AWSaccessKeyID: "" (use shared credentials file or environment variable), AWSsecretAccessKey: "" (use shared credentials file or environment variable), CustomEndpoint: "", Codec: encoding.JSON

Types

type Client

type Client struct {
	// contains filtered or unexported fields
}

Client is a gokv.Store implementation for DynamoDB.

func NewClient

func NewClient(options Options) (Client, error)

NewClient creates a new DynamoDB client.

Credentials can be set in the options, but it's recommended to either use the shared credentials file (Linux: "~/.aws/credentials", Windows: "%UserProfile%\.aws\credentials") or environment variables (AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY). See https://github.com/awsdocs/aws-go-developer-guide/blob/0ae5712d120d43867cf81de875cb7505f62f2d71/doc_source/configuring-sdk.rst#specifying-credentials.

func (Client) Close

func (c Client) Close() error

Close closes the client. In the DynamoDB implementation this doesn't have any effect.

func (Client) Delete

func (c Client) Delete(k string) error

Delete deletes the stored value for the given key. Deleting a non-existing key-value pair does NOT lead to an error. The key must not be "".

func (Client) Get

func (c Client) Get(k string, v interface{}) (found bool, err error)

Get retrieves the stored value for the given key. You need to pass a pointer to the value, so in case of a struct the automatic unmarshalling can populate the fields of the object that v points to with the values of the retrieved object's values. If no value is found it returns (false, nil). The key must not be "" and the pointer must not be nil.

func (Client) Set

func (c Client) Set(k string, v interface{}) error

Set stores the given value for the given key. Values are automatically marshalled to JSON or gob (depending on the configuration). The key must not be "" and the value must not be nil.

type Options

type Options struct {
	Session   *session.Session
	AWSConfig *aws.Config
	TableName string
	// CustomEndpoint allows you to set a custom DynamoDB service endpoint.
	// This is especially useful if you're running a "DynamoDB local" Docker container for local testing.
	// Typical value for the Docker container: "http://localhost:8000".
	// See https://hub.docker.com/r/amazon/dynamodb-local/.
	// Optional ("" by default)
	CustomEndpoint string
	// Encoding format.
	// Optional (encoding.JSON by default).
	Codec encoding.Codec
}

Options are the options for the DynamoDB client.