Configuration

Common configuration

Each service module depends on the AwsConfig layer. This layer is responsible for setting up the AWS Java SDK's async client, by setting the underlying HTTP engine and all the common settings. You can use the following layers to provide AwsConfig:

Default

AwsConfig.default requires a HttpClient as dependency, but does not customize any other setting of the client

Fully customized

AwsConfig.customized(customization) gives the freedom to customize the creation of the AWS async client directly by modifying it's Builder

Configured

AwsConfig.configured() is the recommended way to construct an AwsConfig. Beside requiring a HttpClient it also has ZConfig[CommonAwsConfig] as dependency. The CommonAwsConfig value can be either provided from code for example by ZLayer.succeed(CommonAwsConfig(...)) or it can be read from any of the supported config sources by zio-config.

Note that AWS level retries are disabled by the configuration layer and it is not exposed in the CommonAwsConfig data structure either. The reason for this is that the recommended way to handle retries is to use aspects on the service layers.

See the following table about the possible configuration values. Please note that the underlying HTTP engine also has its own specific configuration which is described on the page about the HTTP engines.

Configuration Details

FieldName	Format	Description	Sources
	all-of

Field Descriptions

FieldName	Format	Description	Sources
region	primitive	value of type string, optional value, AWS region to connect to
credentials	any-one-of	default value: DefaultCredentialsProvider(providerChain=LazyAwsCredentialsProvider(delegate=Lazy(value=Uninitialized))), AWS credentials provider
endpointOverride	primitive	value of type uri, optional value, Overrides the AWS service endpoint
client	all-of	optional value, Common settings for AWS service clients

credentials

FieldName	Format	Description	Sources
	primitive	value of type string
	primitive	value of type string
	primitive	value of type string
	all-of

Field Descriptions

FieldName	Format	Description	Sources
accessKeyId	primitive	value of type string, AWS access key ID
secretAccessKey	primitive	value of type string, AWS secret access key

client

FieldName	Format	Description	Sources
extraHeaders	list	Extra headers to be sent with each request
apiCallTimeout	primitive	value of type duration, optional value, Amount of time to allow the client to complete the execution of an API call
apiCallAttemptTimeout	primitive	value of type duration, optional value, Amount of time to wait for the HTTP request to complete before giving up
defaultProfileName	primitive	value of type string, optional value, Default profile name

extraHeaders

FieldName	Format	Description	Sources
name	primitive	value of type string, Header name
	any-one-of

Field Descriptions

FieldName	Format	Description	Sources
value	list	value of type string, Header value
value	primitive	value of type string, Header value

Service layer

Each AWS service's generated client has it own layer that depends on AwsConfig. It is possible to reuse the same AwsConfig layer for multiple AWS service clients, sharing a common configuration. Usually the service client does not require any additional configuration, in this case the live layer can be used, for example:

program.provide(
    awsConfig,
    Ec2.live,
    ElasticBeanstalk.live
)