Newtonian Particle Motion

    This package has been deprecated

    Author message:

    Package no longer supported. Contact Support at https://www.npmjs.com/support for more info.

    @jduever/serverless-dynamodb-local

    0.2.40 • Public • Published

    serverless-dynamodb-local

    Join the chat at https://gitter.im/99xt/serverless-dynamodb-local npm version License: MIT

    This Plugin Requires

    • serverless@^1
    • Java Runtime Engine (JRE) version 6.x or newer OR docker CLI client

    Features

    • Install DynamoDB Local Java program
    • Run DynamoDB Local as Java program on the local host or in docker container
    • Start DynamoDB Local with all the parameters supported (e.g port, inMemory, sharedDb)
    • Table Creation for DynamoDB Local

    Install Plugin

    npm install --save serverless-dynamodb-local

    Then in serverless.yml add following entry to the plugins array: serverless-dynamodb-local

    plugins:
      - serverless-dynamodb-local

    Using the Plugin

    1. Install DynamoDB Local (unless using docker setup, see below) sls dynamodb install

    2. Add DynamoDB Resource definitions to your Serverless configuration, as defined here: https://serverless.com/framework/docs/providers/aws/guide/resources/#configuration

    3. Start DynamoDB Local and migrate (DynamoDB will process incoming requests until you stop it. To stop DynamoDB, type Ctrl+C in the command prompt window). Make sure above command is executed before this. sls dynamodb start --migrate

    Note: Read the detailed section for more information on advanced options and configurations. Open a browser and go to the url http://localhost:8000/shell to access the web shell for dynamodb local.

    Install: sls dynamodb install

    This installs the Java program locally. If using docker, this step is not required.

    To remove the installed dynamodb local, run: sls dynamodb remove Note: This is useful if the sls dynamodb install failed in between to completely remove and install a new copy of DynamoDB local.

    Start: sls dynamodb start

    This starts the DynamoDB Local instance, either as a local Java program or, if the --docker flag is set, by running it within a docker container. The default is to run it as a local Java program.

    All CLI options are optional:

    --port  		  -p  Port to listen on. Default: 8000
    --cors                    -c  Enable CORS support (cross-origin resource sharing) for JavaScript. You must provide a comma-separated "allow" list of specific domains. The default setting for -cors is an asterisk (*), which allows public access.
    --inMemory                -i  DynamoDB; will run in memory, instead of using a database file. When you stop DynamoDB;, none of the data will be saved. Note that you cannot specify both -dbPath and -inMemory at once.
    --dbPath                  -d  The directory where DynamoDB will write its database file. If you do not specify this option, the file will be written to the current directory. Note that you cannot specify both -dbPath and -inMemory at once. For the path, current working directory is <projectroot>/node_modules/serverless-dynamodb-local/dynamob. For example to create <projectroot>/node_modules/serverless-dynamodb-local/dynamob/<mypath> you should specify -d <mypath>/ or --dbPath <mypath>/ with a forwardslash at the end.
    --sharedDb                -h  DynamoDB will use a single database file, instead of using separate files for each credential and region. If you specify -sharedDb, all DynamoDB clients will interact with the same set of tables regardless of their region and credential configuration.
    --delayTransientStatuses  -t  Causes DynamoDB to introduce delays for certain operations. DynamoDB can perform some tasks almost instantaneously, such as create/update/delete operations on tables and indexes; however, the actual DynamoDB service requires more time for these tasks. Setting this parameter helps DynamoDB simulate the behavior of the Amazon DynamoDB web service more closely. (Currently, this parameter introduces delays only for global secondary indexes that are in either CREATING or DELETING status.)
    --optimizeDbBeforeStartup -o  Optimizes the underlying database tables before starting up DynamoDB on your computer. You must also specify -dbPath when you use this parameter.
    --migration               -m  After starting dynamodb local, run dynamodb migrations.
    --heapInitial                 The initial heap size
    --heapMax                     The maximum heap size
    --migrate                 -m  After starting DynamoDB local, create DynamoDB tables from the Serverless configuration.
    --seed                    -s  After starting and migrating dynamodb local, injects seed data into your tables. The --seed option determines which data categories to onload.
    --convertEmptyValues      -e  Set to true if you would like the document client to convert empty values (0-length strings, binary buffers, and sets) to be converted to NULL types when persisting to DynamoDB.
    --docker                      Run DynamoDB inside docker container instead of as a local Java program
    --dockerImage                 Specify custom docker image. Default: amazon/dynamodb-local
    

    All the above options can be added to serverless.yml to set default configuration: e.g.

    custom:
      dynamodb:
      # If you only want to use DynamoDB Local in some stages, declare them here
        stages:
          - dev
        start:
          port: 8000
          inMemory: true
          heapInitial: 200m
          heapMax: 1g
          migrate: true
          seed: true
          convertEmptyValues: true
        # Uncomment only if you already have a DynamoDB running locally
        # noStart: true

    Docker setup:

    custom:
      dynamodb:
      # If you only want to use DynamoDB Local in some stages, declare them here
        stages:
          - dev
        start:
          docker: true
          port: 8000
          inMemory: true
          migrate: true
          seed: true
          convertEmptyValues: true
        # Uncomment only if you already have a DynamoDB running locally
        # noStart: true

    Migrations: sls dynamodb migrate

    Configuration

    In serverless.yml add following to execute all the migration upon DynamoDB Local Start

    custom:
      dynamodb:
        start:
          migrate: true

    AWS::DynamoDB::Table Resource Template for serverless.yml

    resources:
      Resources:
        usersTable:
          Type: AWS::DynamoDB::Table
          Properties:
            TableName: usersTable
            AttributeDefinitions:
              - AttributeName: email
                AttributeType: S
            KeySchema:
              - AttributeName: email
                KeyType: HASH
            ProvisionedThroughput:
              ReadCapacityUnits: 1
              WriteCapacityUnits: 1

    Note: DynamoDB local doesn't support TTL specification, therefore plugin will simply ignore ttl configuration from Cloudformation template.

    Seeding: sls dynamodb seed

    Configuration

    In serverless.yml seeding categories are defined under dynamodb.seed.

    If dynamodb.start.seed is true, then seeding is performed after table migrations.

    If you wish to use raw AWS AttributeValues to specify your seed data instead of Javascript types then simply change the variable of any such json files from sources: to rawsources:.

    custom:
      dynamodb:
        start:
          seed: true
    
        seed:
          domain:
            sources:
              - table: domain-widgets
                sources: [./domainWidgets.json]
              - table: domain-fidgets
                sources: [./domainFidgets.json]
          test:
            sources:
              - table: users
                rawsources: [./fake-test-users.json]
              - table: subscriptions
                sources: [./fake-test-subscriptions.json]
    > sls dynamodb seed --seed=domain,test
    > sls dynamodb start --seed=domain,test

    If seed config is set to true, your configuration will be seeded automatically on startup. You can also put the seed to false to prevent initial seeding to use manual seeding via cli.

    [
      {
        "id": "John",
        "name": "Doe",
      },
    ]

    Using DynamoDB Local in your code

    You need to add the following parameters to the AWS NODE SDK dynamodb constructor

    e.g. for dynamodb document client sdk

    var AWS = require('aws-sdk');
    
    new AWS.DynamoDB.DocumentClient({
        region: 'localhost',
        endpoint: 'http://localhost:8000',
        accessKeyId: 'DEFAULT_ACCESS_KEY',  // needed if you don't have aws credentials at all in env
        secretAccessKey: 'DEFAULT_SECRET' // needed if you don't have aws credentials at all in env
    })
    

    e.g. for dynamodb document client sdk

    new AWS.DynamoDB({
        region: 'localhost',
        endpoint: 'http://localhost:8000',
        accessKeyId: 'DEFAULT_ACCESS_KEY',  // needed if you don't have aws credentials at all in env
        secretAccessKey: 'DEFAULT_SECRET' // needed if you don't have aws credentials at all in env
    
    })
    

    Using with serverless-offline plugin

    When using this plugin with serverless-offline, it is difficult to use above syntax since the code should use DynamoDB Local for development, and use DynamoDB Online after provisioning in AWS. Therefore we suggest you to use serverless-dynamodb-client plugin in your code.

    The serverless dynamodb start command can be triggered automatically when using serverless-offline plugin. Please note that you still need to install DynamoDB Local first.

    Add both plugins to your serverless.yml file:

    plugins:
      - serverless-dynamodb-local
      - serverless-offline

    Make sure that serverless-dynamodb-local is above serverless-offline so it will be loaded earlier.

    Now your local DynamoDB database will be automatically started before running serverless offline.

    Using with serverless-offline and serverless-webpack plugin

    Run serverless offline start. In comparison with serverless offline, the start command will fire an init and a end lifecycle hook which is needed for serverless-offline and serverless-dynamodb-local to switch off both ressources.

    Add plugins to your serverless.yml file:

    plugins:
      - serverless-webpack
      - serverless-dynamodb-local
      - serverless-offline #serverless-offline needs to be last in the list

    Reference Project

    Links

    License

    MIT

    Install

    npm i @jduever/serverless-dynamodb-local

    DownloadsWeekly Downloads

    3

    Version

    0.2.40

    License

    MIT

    Unpacked Size

    52.2 kB

    Total Files

    16

    Last publish

    Collaborators

    • jonasd