diff --git a/account-parent/functions/account-created-function/.gitignore b/account-parent/functions/account-created-function/.gitignore deleted file mode 100644 index 7d845af..0000000 --- a/account-parent/functions/account-created-function/.gitignore +++ /dev/null @@ -1,39 +0,0 @@ -# Logs -logs -*.log -npm-debug.log* - -# Runtime data -pids -*.pid -*.seed - -# Directory for instrumented libs generated by jscoverage/JSCover -lib-cov - -# Coverage directory used by tools like istanbul -coverage - -# nyc test coverage -.nyc_output - -# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files) -.grunt - -# node-waf configuration -.lock-wscript - -# Compiled binary addons (http://nodejs.org/api/addons.html) -build/Release - -# Dependency directories -node_modules -jspm_packages - -# Optional npm cache directory -.npm - -# Optional REPL history -.node_repl_history - -deployment.yaml diff --git a/account-parent/functions/account-created-function/LICENSE b/account-parent/functions/account-created-function/LICENSE deleted file mode 100644 index 8dada3e..0000000 --- a/account-parent/functions/account-created-function/LICENSE +++ /dev/null @@ -1,201 +0,0 @@ - Apache License - Version 2.0, January 2004 - http://www.apache.org/licenses/ - - TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION - - 1. 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This function is referenced in an [_Event Stream Processing Microservices_](https://github.com/kbastani/event-stream-processing-microservices/tree/master) example project as a git sub-module. - -The lambda function is triggered from events sourced from the [account-worker](https://github.com/kbastani/event-stream-processing-microservices/tree/master/account-parent) application. The lambda function uses an _Amazon API Gateway_ trigger that is invoked from a _Spring Cloud Stream_ application. - -**Function Details**: - -This lambda function responds to an [AccountEvent](https://github.com/kbastani/event-stream-processing-microservices/blob/master/account-parent/account-web/src/main/java/demo/event/AccountEvent.java) that applies a state change to an [Account](https://github.com/kbastani/event-stream-processing-microservices/blob/master/account-parent/account-web/src/main/java/demo/account/Account.java) resource. - -- **context**: [accounts](https://github.com/kbastani/event-stream-processing-microservices/tree/master/account-parent) -- **function**: account-created -- **source_state**: `ACCOUNT_CREATED` -- **target_state**: `ACCOUNT_PENDING` -- **event_type**: `ACCOUNT_CREATED` -- **event_format**: [application/hal+json](http://stateless.co/hal_specification.html) - -**Description**: - -This event handler is triggered in response to an _Account_ resource transitioning from an `ACCOUNT_CREATED` status to an `ACCOUNT_PENDING` status. The function should apply the `ACCOUNT_PENDING` status to the _Account_ API resource that is linked within the payload of the supplied _AccountEvent_ resource. - -This AWS lambda function is a backing service to the [account-worker](https://github.com/kbastani/event-stream-processing-microservices/tree/master/account-parent/account-worker) application. A service binding should inject the _AWS Lambda_ resource address and credentials into the _account-worker_ container as environment variables. - -![Account microservice](http://i.imgur.com/WZTR4lQ.png) - -The lambda function uses a Node.js module named [Traverson](https://github.com/basti1302/traverson), which is a REST client implementation for [HATEOAS](https://en.wikipedia.org/wiki/HATEOAS). The reference architecture uses [Spring HATEOAS](http://projects.spring.io/spring-hateoas/) to describe REST API resources with embedded links. The links embedded in each API resource allows the code in the lambda function to be completely stateless. - -The lambda function only needs to import the _Traverson_ dependency to interact with API resources managed by the [account-web](https://github.com/kbastani/event-stream-processing-microservices/tree/master/account-parent/account-web) microservice. - -```javascript -// Lambda Function Handler (Node.js) -exports.handler = (event, context, callback) => { - // Loads the traverson client module - var traverson = require('traverson'); - - // Apply the confirm command to the Account resource - traverson - .from(event._links.account.href) - .follow('$._links.self.href', - '$._links.commands.href', - '$._links.confirm.href') - .get(function(error, response) { - // Return the account result - callback(error, response); - }); -}; -``` - -## Deployment - -A shell script is provided in `./deploy.sh`. This script uses the AWS CLI to create a deployment package using an [AWS CloudFormation Template](https://aws.amazon.com/cloudformation/aws-cloudformation-templates/) defined in `./account-created.yaml`. To deploy the lambda function, you must have the AWS CLI installed and configured to an IAM user with sufficient permissions to execute the script. - -The script will create a deployment package for the lambda function and upload it as a zip file to an S3 bucket. The bucket name is an argument to the the deployment script. diff --git a/account-parent/functions/account-created-function/deploy.sh b/account-parent/functions/account-created-function/deploy.sh deleted file mode 100755 index 2a6537b..0000000 --- a/account-parent/functions/account-created-function/deploy.sh +++ /dev/null @@ -1,71 +0,0 @@ -#!/bin/bash - -ls ./node_modules &> /dev/null || echo "Installing node_modules..."; npm install --silent &> /dev/null; echo "" - -function error_exit { - msg="$1" - if [ -z "$1" ] - then - exit 1 - else - echo -e "" - echo -e "\x1B[31m$msg\x1B[0m" - exit 1 - fi -} - -function print_help { - echo -e "Usage: $ ./deploy.sh bucket_name" -} - -if [ "$1" = 'help' ] - then - print_help - exit 1 -fi - -if [ $# -eq 0 ] - then - echo -e "An Amazon S3 bucket name is required as an argument" - print_help - error_exit "Deployment failed..." -fi - -if [ -z "$1" ] - then - echo -e "The supplied S3 bucket name is not valid" - print_help - error_exit "Deployment failed..." -fi - -bucket_name="$1" - -function package { - # Create a CloudFormation package for this AWS Lambda function - echo -e "Packacking deployment..." - echo "" - - aws cloudformation package \ - --template-file package.yaml \ - --output-template-file deployment.yaml \ - --s3-bucket $bucket_name || error_exit "Packaging failed: Could not access the S3 bucket..." - - echo "" - - deploy -} - -function deploy { - # Deploy the CloudFormation package - echo -e "Deploying package from s3://$bucket_name..." - echo "" - - aws cloudformation deploy \ - --template-file deployment.yaml \ - --stack-name account-created || error_exit "Deployment failed..." - - # Remove the deployment package - rm ./deployment.yaml -} - -package diff --git a/account-parent/functions/account-created-function/index.js b/account-parent/functions/account-created-function/index.js deleted file mode 100755 index 326ddf7..0000000 --- a/account-parent/functions/account-created-function/index.js +++ /dev/null @@ -1,112 +0,0 @@ -// Lambda Function Handler (Node.js) -exports.handler = (event, context, callback) => { - accountCreated(event, callback); -}; - -// Link traversals -var links = { - account: '$._links.self.href' -}; - -// DSL for creating a resource flow -var flow = { - tasks: [], - callback: {}, - steps: { - then: function(step) { - flow.tasks.push(step); - return flow.steps; - }, - start: function(traversal, callback) { - flow.callback = callback; - flow.next({ - traversal: traversal - }); - } - }, - next: function(context) { - flow.tasks.shift()(context); - } -}; - -// Handle the account created event -function accountCreated(event, callback) { - // Loads the traverson client module - var traverson = require('traverson'); - var JsonHalAdapter = require('traverson-hal'); - traverson.registerMediaType(JsonHalAdapter.mediaType, JsonHalAdapter); - - // Get the account resource href from event - var accountUrl = event._links.account.href; - - // Apply the pending status to the attached account - var traversal = traverson.from(accountUrl) - .json() - .withRequestOptions({ - headers: { - "Accept": 'application/hal+json', - "Content-Type": 'application/hal+json' - } - }); - - // Execute account pending workflow - flow.steps - .then(getAccount) - .then(setPending) - .start(traversal, callback); -} - -// Gets the account and sends it to the next step -function getAccount(context) { - console.log("Getting account..."); - - // Fetch account resource - var fetchResource = function(error, account, traversal) { - if (error) return done(error); - - if (account.status != "ACCOUNT_CREATED") { - done("Pending account failed, account state invalid: " + - account.status); - } else { - // Trigger the setPending step - flow.next({ - account: account, - traversal: traversal - }); - } - }; - - // Follow the account resource - context.traversal - .follow(links.account) - .getResource(fetchResource); -} - -// Sets the account status to pending for the next step -function setPending(context) { - console.log("Updating account..."); - - var updateAccount = function(error, account, traversal) { - if (error) return done(error); - - if (account.status == "ACCOUNT_PENDING") { - // Complete the flow - flow.callback(null, account); - } else { - done("Account update failed: status could not be updated to pending"); - } - }; - - // Set account to pending - context.account.status = "ACCOUNT_PENDING"; - - // Update the account resource - context.traversal - .continue() - .put(context.account, updateAccount); -} - -// Something went wrong, notify the callback handler -function done(error) { - flow.callback(error); -} diff --git a/account-parent/functions/account-created-function/package.json b/account-parent/functions/account-created-function/package.json deleted file mode 100644 index 22667d4..0000000 --- a/account-parent/functions/account-created-function/package.json +++ /dev/null @@ -1,22 +0,0 @@ -{ - "name": "account-created-function", - "version": "1.0.0", - "description": "Account created AWS Lambda function", - "main": "index.js", - "dependencies": { - "traverson": "^3.2.0", - "traverson-hal": "^4.1.1" - }, - "devDependencies": {}, - "scripts": {}, - "repository": { - "type": "git", - "url": "git+https://github.com/kbastani/account-created-function.git" - }, - "author": "kbastani", - "license": "ISC", - "bugs": { - "url": "https://github.com/kbastani/account-created-function/issues" - }, - "homepage": "https://github.com/kbastani/account-created-function#readme" -} diff --git a/account-parent/functions/account-created-function/package.yaml b/account-parent/functions/account-created-function/package.yaml deleted file mode 100644 index ebf62d0..0000000 --- a/account-parent/functions/account-created-function/package.yaml +++ /dev/null @@ -1,20 +0,0 @@ -AWSTemplateFormatVersion: '2010-09-09' -Transform: 'AWS::Serverless-2016-10-31' -Description: Account created handler -Resources: - accountCreated: - Type: 'AWS::Serverless::Function' - Properties: - Handler: index.handler - Runtime: nodejs4.3 - CodeUri: . - Description: Responds to an account creation event - MemorySize: 128 - Timeout: 10 - Role: 'arn:aws:iam::194021864310:role/service-role/public' - Events: - Api1: - Type: Api - Properties: - Path: /accountCreated - Method: ANY