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serverless.yml
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serverless.yml
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service: appsyncmasterclass-backend
frameworkVersion: "2"
plugins:
- serverless-appsync-plugin
- serverless-iam-roles-per-function
- serverless-export-env # downloads as .env to load in test cases
- serverless-manifest-plugin
custom:
region: ${opt:region, self:provider.region}
stage: ${opt:stage, self:provider.stage}
appSync:
- ${file(serverless.appsync-api.yml)}
manifest:
postProcess: ./processManifest.js
disablePostDeployGeneration: true
disableOutput: true
silent: true
provider:
name: aws
runtime: nodejs12.x
region: us-east-2
environment:
STAGE: ${self:custom.stage}
AWS_NODEJS_CONNECTION_REUSE_ENABLED: "1"
package:
exclude:
- package-lock.json
- package.json
functions:
confirmUserSignup:
handler: functions/confirm-user-signup.handler
environment:
USERS_TABLE: !Ref UsersTable
iamRoleStatements:
- Effect: Allow
Action: dynamodb:PutItem
Resource: !GetAtt UsersTable.Arn
getImageUploadUrl:
handler: functions/get-upload-url.handler
environment:
BUCKET_NAME: !Ref AssetsBucket
iamRoleStatements:
- Effect: Allow
Action:
- s3:PutObject
- s3:PutObjectAcl
Resource:
- !Sub ${AssetsBucket.Arn}/*
retweet:
handler: functions/retweet.handler
environment:
USERS_TABLE: !Ref UsersTable
TWEETS_TABLE: !Ref TweetsTable
TIMELINES_TABLE: !Ref TimelinesTable
RETWEETS_TABLE: !Ref RetweetsTable
iamRoleStatements:
- Effect: Allow
Action: dynamodb:GetItem
Resource: !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:UpdateItem
Resource:
- !GetAtt UsersTable.Arn
- !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:PutItem
Resource:
- !GetAtt TimelinesTable.Arn
- !GetAtt TweetsTable.Arn
- !GetAtt RetweetsTable.Arn
reply:
handler: functions/reply.handler
environment:
TWEETS_TABLE: !Ref TweetsTable
USERS_TABLE: !Ref UsersTable
TIMELINES_TABLE: !Ref TimelinesTable
iamRoleStatements:
- Effect: Allow
Action: dynamodb:GetItem
Resource: !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:UpdateItem
Resource:
- !GetAtt UsersTable.Arn
- !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:PutItem
Resource:
- !GetAtt TimelinesTable.Arn
- !GetAtt TweetsTable.Arn
tweet:
handler: functions/tweet.handler
environment:
USERS_TABLE: !Ref UsersTable
TWEETS_TABLE: !Ref TweetsTable
TIMELINES_TABLE: !Ref TimelinesTable
iamRoleStatements:
- Effect: Allow
Action: dynamodb:UpdateItem
Resource: !GetAtt UsersTable.Arn
- Effect: Allow
Action: dynamodb:PutItem
Resource:
- !GetAtt TimelinesTable.Arn
- !GetAtt TweetsTable.Arn
# get tweet
# decrement user tweetCount
# decretment tweetId retweetsCount
# delete from timelinesTable
# delete from tweetsTable
# delete from retweets table
unretweet:
handler: functions/unretweet.handler
environment:
USERS_TABLE: !Ref UsersTable
TWEETS_TABLE: !Ref TweetsTable
TIMELINES_TABLE: !Ref TimelinesTable
RETWEETS_TABLE: !Ref RetweetsTable
iamRoleStatements:
- Effect: Allow
Action: dynamodb:GetItem
Resource: !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:Query
Resource: !Sub "${TweetsTable.Arn}/index/retweetsByCreator" # access to query by index
- Effect: Allow
Action: dynamodb:UpdateItem
Resource:
- !GetAtt UsersTable.Arn
- !GetAtt TweetsTable.Arn
- Effect: Allow
Action: dynamodb:DeleteItem
Resource:
- !GetAtt TimelinesTable.Arn
- !GetAtt TweetsTable.Arn
- !GetAtt RetweetsTable.Arn
distributeTweets:
handler: functions/distribute-tweets.handler
environment:
RELATIONSHIPS_TABLE: !Ref RelationshipsTable
TIMELINES_TABLE: !Ref TimelinesTable
events:
- stream:
type: dynamodb
arn: !GetAtt TweetsTable.StreamArn
iamRoleStatements:
- Effect: Allow
Action:
- dynamodb:PutItem
- dynamodb:DeleteItem
- dynamodb:BatchWriteItem
Resource: !GetAtt TimelinesTable.Arn
- Effect: Allow
Action: dynamodb:Query
Resource: !Sub "${RelationshipsTable.Arn}/index/byOtherUser"
distributeTweetsToFollower:
handler: functions/distribute-tweets-to-follower.handler
environment:
TWEETS_TABLE: !Ref TweetsTable
TIMELINES_TABLE: !Ref TimelinesTable
MAX_TWEETS: 100
events:
- stream:
type: dynamodb
arn: !GetAtt RelationshipsTable.StreamArn
iamRoleStatementsName: ${self:service}-${self:custom.stage}-distributeTweetsToFollower
iamRoleStatements:
- Effect: Allow
Action: dynamodb:Query
Resource:
- !Sub "${TweetsTable.Arn}/index/byCreator"
- !Sub "${TimelinesTable.Arn}/index/byDistributedFrom"
- Effect: Allow
Action:
- dynamodb:BatchWriteItem
- dynamodb:PutItem
- dynamodb:DeleteItem
Resource: !GetAtt TimelinesTable.Arn
resources:
Resources:
UsersTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: id
KeyType: HASH
AttributeDefinitions:
- AttributeName: id
AttributeType: S
- AttributeName: screenName
AttributeType: S
GlobalSecondaryIndexes:
- IndexName: byScreenName
KeySchema:
- AttributeName: screenName
KeyType: HASH
Projection:
ProjectionType: ALL
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: users-table
TweetsTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: id
KeyType: HASH
AttributeDefinitions:
- AttributeName: id
AttributeType: S
- AttributeName: creator
AttributeType: S
- AttributeName: retweetOf
AttributeType: S
- AttributeName: inReplyToTweetId
AttributeType: S
GlobalSecondaryIndexes:
- IndexName: byCreator
KeySchema:
- AttributeName: creator
KeyType: HASH
- AttributeName: id
KeyType: RANGE
Projection:
ProjectionType: ALL
- IndexName: retweetsByCreator # a sparse index
KeySchema:
- AttributeName: creator
KeyType: HASH
- AttributeName: retweetOf
KeyType: RANGE
Projection:
ProjectionType: ALL
- IndexName: repliesForTweet # a sparse index
KeySchema:
- AttributeName: inReplyToTweetId
KeyType: HASH
- AttributeName: id
KeyType: RANGE
Projection:
ProjectionType: ALL
StreamSpecification:
StreamViewType: NEW_AND_OLD_IMAGES
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: tweets-table
TimelinesTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: userId
KeyType: HASH
- AttributeName: tweetId
KeyType: RANGE
AttributeDefinitions:
- AttributeName: userId
AttributeType: S
- AttributeName: tweetId
AttributeType: S
- AttributeName: distributedFrom
AttributeType: S
GlobalSecondaryIndexes:
- IndexName: byDistributedFrom
KeySchema:
- AttributeName: userId
KeyType: HASH
- AttributeName: distributedFrom
KeyType: RANGE
Projection:
ProjectionType: ALL
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: timelines-table
LikesTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: userId
KeyType: HASH
- AttributeName: tweetId
KeyType: RANGE
AttributeDefinitions:
- AttributeName: userId
AttributeType: S
- AttributeName: tweetId
AttributeType: S
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: likes-table
RetweetsTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: userId
KeyType: HASH
- AttributeName: tweetId
KeyType: RANGE
AttributeDefinitions:
- AttributeName: userId
AttributeType: S
- AttributeName: tweetId
AttributeType: S
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: retweets-table
RelationshipsTable:
Type: AWS::DynamoDB::Table
Properties:
BillingMode: PAY_PER_REQUEST
KeySchema:
- AttributeName: userId
KeyType: HASH
- AttributeName: sk
KeyType: RANGE
AttributeDefinitions:
- AttributeName: userId
AttributeType: S
- AttributeName: sk
AttributeType: S
- AttributeName: otherUserId
AttributeType: S
GlobalSecondaryIndexes:
- IndexName: byOtherUser
KeySchema:
- AttributeName: otherUserId
KeyType: HASH
- AttributeName: sk
KeyType: RANGE
Projection:
ProjectionType: ALL
StreamSpecification:
StreamViewType: NEW_AND_OLD_IMAGES
Tags:
- Key: Environment
Value: ${self:custom.stage}
- Key: Name
Value: relationships-table
CognitoUserPool:
Type: AWS::Cognito::UserPool
Properties:
EmailConfiguration:
EmailSendingAccount: DEVELOPER
SourceArn: arn:aws:ses:us-east-1:144210659423:identity/[email protected]
AutoVerifiedAttributes:
- email
Policies:
PasswordPolicy:
MinimumLength: 8
RequireLowercase: false
RequireNumbers: false
RequireUppercase: false
RequireSymbols: false
UsernameAttributes:
- email
Schema:
- AttributeDataType: String
Name: name
Required: false
Mutable: true
LambdaConfig:
PostConfirmation: !GetAtt ConfirmUserSignupLambdaFunction.Arn
UserPoolInvokeConfirmUserSignupLambdaPermission:
Type: AWS::Lambda::Permission
Properties:
Action: lambda:invokeFunction
FunctionName: !Ref ConfirmUserSignupLambdaFunction
Principal: cognito-idp.amazonaws.com
SourceArn: !GetAtt CognitoUserPool.Arn
WebUserPoolClient:
Type: AWS::Cognito::UserPoolClient
Properties:
UserPoolId: !Ref CognitoUserPool
ClientName: web
ExplicitAuthFlows:
- ALLOW_USER_SRP_AUTH
- ALLOW_USER_PASSWORD_AUTH
- ALLOW_REFRESH_TOKEN_AUTH
PreventUserExistenceErrors: ENABLED # protects from user knowing if account/password is incorrect for security
AssetsBucket:
Type: AWS::S3::Bucket
Properties:
AccelerateConfiguration:
AccelerationStatus: Enabled
CorsConfiguration:
CorsRules:
- AllowedMethods:
- GET
- PUT
AllowedOrigins:
- "*"
AllowedHeaders:
- "*"
Outputs:
CognitoUserPoolId:
Value: !Ref CognitoUserPool
AwsRegion:
Value: ${self:custom.region}
WebCognitoUserPoolClientId:
Value: !Ref WebUserPoolClient