4.2. Changing Event Store (original) (raw)

AWS DynamoDB

To use AWS DynamoDB event store we need to add localstack container. This way we can use a fully functional local AWS cloud stack.

helm/requirements.yaml

dependencies: +# AWS localstack (for local development)

- name: microservice
version: 0.1.0
repository: "file://../microservice"
alias: localstack
condition: localstack.enabled

helm/values.yaml

ingress: paths:

- path: /localstack
```
 backend:
```

   serviceName: go-api-boilerplate-localstack

```
   servicePort: 4567
```
AWS localstack https://github.com/localstack/localstack
localstack:
enabled: true
nameOverride: localstack
image:
```
repository: localstack/localstack
```
```
tag: 0.8.10
```
```
pullPolicy: IfNotPresent
```
service:
```
ports:
```
```
  - name: dynamodb
```
```
    internalPort: 4569
```
```
    externalPort: 4569
```
```
  - name: ui
```
```
    internalPort: 4567
```
```
    externalPort: 4567
```
env:
```
- name: SERVICES
```
```
  valueFrom: "dynamodb:4569"
```
```
- name: PORT_WEB_UI
```
```
  valueFrom: 4567
```

user: env:

- name: AWS_REGION
```
 valueFrom:
```
```
   configMapKeyRef:
```
```
     key: AWS_REGION
```
```
     name: go-api-boilerplate-app
```
- name: AWS_ENDPOINT
```
 valueFrom:
```
```
   configMapKeyRef:
```
```
     key: AWS_ENDPOINT
```
```
     name: go-api-boilerplate-app
```

configMap: data:

AWS_REGION: 'us-east-1'
AWS_ENDPOINT: 'http://go-api-boilerplate-localstack:4569'

Finally we can switch memory event store to DynamoDB one as follow:

cmd/user/main.go

package main

import ( + "github.com/aws/aws-sdk-go/aws" - "github.com/vardius/go-api-boilerplate/pkg/eventstore/memory" + "github.com/vardius/go-api-boilerplate/pkg/eventstore/dynamodb" )

type config struct { + AwsRegion string env:"AWS_REGION" envDefault:"us-east-1" + AwsEndpoint string env:"AWS_ENDPOINT" envDefault:"http://localhost:4569" }

func main() { ctx := context.Background()

cfg := config{}
env.Parse(&cfg)

awsConfig := &aws.Config{
```
  Region:   aws.String(cfg.AwsRegion),
```

  Endpoint: aws.String(cfg.AwsEndpoint),

}

eventStore := eventstore.New()

eventStore := eventstore.New("events", awsConfig)

4.2. Changing Event Store (original) (raw)

AWS DynamoDB

helm/requirements.yaml

helm/values.yaml

AWS localstack https://github.com/localstack/localstack

cmd/user/main.go