Amazon SFN Client

Amazon AWS Step Functions (SFN) is a cloud service that enables you to coordinate and automate the execution of multiple AWS services in a serverless workflow. It allows you to design, visualize, and execute workflows using a state machine architecture. With SFN, you can seamlessly integrate various AWS services, including Lambda functions, Amazon S3, Amazon DynamoDB, and others, into a cohesive and scalable workflow.

You can find more information about SFN at the Amazon SFN website.

The SFN extension is based on AWS Java SDK 2.x. It’s a major rewrite of the 1.x code base that offers two programming models (Blocking & Async).

The Quarkus extension supports two programming models:

  • Blocking access using URL Connection HTTP client (by default) or the Apache HTTP Client

  • Asynchronous programming based on JDK’s CompletableFuture objects and the Netty HTTP client (by default) or the AWS CRT-based HTTP client

In this guide, we see how you can get your REST services to use SFN locally and on AWS.

Prerequisites

To complete this guide, you need:

  • JDK 17+ installed with JAVA_HOME configured appropriately

  • an IDE

  • Apache Maven 3.8.1+

  • An AWS Account to access the SFN service

  • Optionally, Docker for your system to run SFN locally for testing purposes

Provision SFN locally via Dev Services

The easiest way to start working with SFN is to run a local instance using Dev Services.

Provision SFN locally manually

You can also set up a local version of SFN manually, first start a LocalStack container:

docker run -it --publish 4566:4566 -e SERVICES=stepfunctions -e START_WEB=0 localstack/localstack:3.0.1

This starts a SFN instance that is accessible on port 4566.

Create an AWS profile for your local instance using AWS CLI:

$ aws configure --profile localstack
AWS Access Key ID [None]: test-key
AWS Secret Access Key [None]: test-secret
Default region name [None]: us-east-1
Default output format [None]: text

Create a SFN state machine

Create a SFN state machine using AWS CLI and store the state machine ARN in a STATE_MACHINE_ARN variable:

STATE_MACHINE_ARN=$(aws stepfunctions create-state-machine --definition "{\
  \"Comment\": \"A Hello World example of the Amazon States Language using a Pass state\",\
  \"StartAt\": \"HelloWorld\",\
  \"States\": {\
    \"HelloWorld\": {\
      \"Type\": \"Pass\",\
      \"End\": true\
    }\
  }}" --name "HelloWorld" --role-arn "arn:aws:iam::012345678901:role/DummyRole"  --endpoint-url http://localhost:4566 --profile localstack --query stateMachineArn --output text)

Start an execution using the ARN of the state machine you created and store the execution ARN in a EXECUTION_ARN variable:

EXECUTION_ARN=$(aws stepfunctions start-execution --state-machine-arn "$STATE_MACHINE_ARN" --endpoint-url http://localhost:4566 --profile localstack --query executionArn --output text)

Finally, get the information about the state machine execution:

aws stepfunctions describe-execution --execution-arn "$EXECUTION_ARN" --endpoint-url http://localhost:4566 --profile localstack

Creating the Maven project

First, we need a new project. Create a new project with the following command:

mvn io.quarkus.platform:quarkus-maven-plugin:3.9.0:create \
    -DprojectGroupId=org.acme \
    -DprojectArtifactId=amazon-sfn-quickstart \
    -DclassName="org.acme.sfn.QuarkusSfnSyncResource" \
    -Dpath="/sync" \
    -Dextensions="resteasy-reactive-jackson,amazon-sfn"
cd amazon-sfn-quickstart

This command generates a Maven structure importing the RESTEasy Reactive/JAX-RS and Amazon SFN Client extensions. After this, the amazon-sfn extension has been added to your pom.xml as well as the Mutiny support for RESTEasy.

Configuring SFN clients

Both SFN clients (sync and async) are configurable via the application.properties file that can be provided in the src/main/resources directory. Additionally, you need to add to the classpath a proper implementation of the sync client. By default, the extension uses URL connection HTTP client, so you need to add a URL connection client dependency to the pom.xml file:

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>url-connection-client</artifactId>
</dependency>

If you want to use the Apache HTTP client instead, configure it as follows:

quarkus.sfn.sync-client.type=apache

And add the following dependency to the application pom.xml:

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>apache-client</artifactId>
</dependency>

If you want to use the AWS CRT-based HTTP client instead, configure it as follows:

quarkus.sfn.sync-client.type=aws-crt

And add the following dependency to the application pom.xml:

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>aws-crt-client</artifactId>
</dependency>

If you’re going to use a local SFN instance, configure it as follows:

quarkus.sfn.endpoint-override=http://localhost:4566

quarkus.sfn.aws.region=us-east-1
quarkus.sfn.aws.credentials.type=static
quarkus.sfn.aws.credentials.static-provider.access-key-id=test-key
quarkus.sfn.aws.credentials.static-provider.secret-access-key=test-secret
  • quarkus.sfn.aws.region - It’s required by the client, but since you’re using a local SFN instance you can pick any valid AWS region.

  • quarkus.sfn.aws.credentials.type - Set static credentials provider with any values for access-key-id and secret-access-key

  • quarkus.sfn.endpoint-override - Override the SFN client to use a local instance instead of an AWS service

If you want to work with an AWS account, you’d need to set it with:

quarkus.sfn.aws.region=<YOUR_REGION>
quarkus.sfn.aws.credentials.type=default
  • quarkus.sfn.aws.region you should set it to the region where you provisioned the SFN state machine,

  • quarkus.sfn.aws.credentials.type - use the default credentials provider chain that looks for credentials in this order:

    • Java System Properties - aws.accessKeyId and aws.secretAccessKey

    • Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY

    • Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI

    • Credentials delivered through the Amazon ECS if the AWS_CONTAINER_CREDENTIALS_RELATIVE_URI environment variable is set and the security manager has permission to access the variable,

    • Instance profile credentials delivered through the Amazon EC2 metadata service

Next steps

Packaging

Packaging your application is as simple as ./mvnw clean package. It can then be run with java -Dparameters.path=/quarkus/is/awesome/ -jar target/quarkus-app/quarkus-run.jar.

With GraalVM installed, you can also create a native executable binary: ./mvnw clean package -Dnative. Depending on your system, that will take some time.

Going asynchronous

Thanks to the AWS SDK v2.x used by the Quarkus extension, you can use the asynchronous programming model out of the box.

We need to add Netty HTTP client dependency to the pom.xml:

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>netty-nio-client</artifactId>
</dependency>

If you want to use the AWS CRT-based HTTP client instead, configure it as follows:

quarkus.sfn.async-client.type=aws-crt

And add the following dependency to the application pom.xml:

<dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>aws-crt-client</artifactId>
</dependency>

Configuration Reference

Configuration property fixed at build time - All other configuration properties are overridable at runtime

Configuration property

Type

Default

List of execution interceptors that will have access to read and modify the request and response objects as they are processed by the AWS SDK.

The list should consists of class names which implements software.amazon.awssdk.core.interceptor.ExecutionInterceptor interface. Classes will be attempted to be loaded via CDI first, and if no CDI beans are available, then the constructor with no parameters will be invoked to instantiate each class.

Environment variable: QUARKUS_SFN_INTERCEPTORS

list of string

OpenTelemetry AWS SDK instrumentation will be enabled if the OpenTelemetry extension is present and this value is true.

Environment variable: QUARKUS_SFN_TELEMETRY_ENABLED

boolean

false

Type of the sync HTTP client implementation

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TYPE

url, apache, aws-crt

url

Type of the async HTTP client implementation

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TYPE

netty, aws-crt

netty

If a local AWS stack should be used. (default to true) If this is true and endpoint-override is not configured then a local AWS stack will be started and will be used instead of the given configuration. For all services but Cognito, the local AWS stack will be provided by LocalStack. Otherwise, it will be provided by Moto

Environment variable: QUARKUS_SFN_DEVSERVICES_ENABLED

boolean

Indicates if the LocalStack container managed by Dev Services is shared. When shared, Quarkus looks for running containers using label-based service discovery. If a matching container is found, it is used, and so a second one is not started. Otherwise, Dev Services starts a new container.

The discovery uses the quarkus-dev-service-localstack label. The value is configured using the service-name property.

Sharing is not supported for the Cognito extension.

Environment variable: QUARKUS_SFN_DEVSERVICES_SHARED

boolean

false

Indicates if shared LocalStack services managed by Dev Services should be isolated. When true, the service will be started in its own container and the value of the quarkus-dev-service-localstack label will be suffixed by the service name (s3, sqs, …​)

Environment variable: QUARKUS_SFN_DEVSERVICES_ISOLATED

boolean

true

The value of the quarkus-dev-service-localstack label attached to the started container. In dev mode, when shared is set to true, before starting a container, Dev Services looks for a container with the quarkus-dev-service-localstack label set to the configured value. If found, it will use this container instead of starting a new one. Otherwise it starts a new container with the quarkus-dev-service-localstack label set to the specified value. In test mode, Dev Services will group services with the same service-name value in one container instance.

This property is used when you need multiple shared LocalStack instances.

Environment variable: QUARKUS_SFN_DEVSERVICES_SERVICE_NAME

string

localstack

Generic properties that are pass for additional container configuration.

Environment variable: QUARKUS_SFN_DEVSERVICES_CONTAINER_PROPERTIES

Map<String,String>

AWS SDK client configurations

Type

Default

The endpoint URI with which the SDK should communicate.

If not specified, an appropriate endpoint to be used for the given service and region.

Environment variable: QUARKUS_SFN_ENDPOINT_OVERRIDE

URI

The amount of time to allow the client to complete the execution of an API call.

This timeout covers the entire client execution except for marshalling. This includes request handler execution, all HTTP requests including retries, unmarshalling, etc.

This value should always be positive, if present.

Environment variable: QUARKUS_SFN_API_CALL_TIMEOUT

Duration

The amount of time to wait for the HTTP request to complete before giving up and timing out.

This value should always be positive, if present.

Environment variable: QUARKUS_SFN_API_CALL_ATTEMPT_TIMEOUT

Duration

Whether the Quarkus thread pool should be used for scheduling tasks such as async retry attempts and timeout task.

When disabled, the default sdk behavior is to create a dedicated thread pool for each client, resulting in competition for CPU resources among these thread pools.

Environment variable: QUARKUS_SFN_ADVANCED_USE_QUARKUS_SCHEDULED_EXECUTOR_SERVICE

boolean

true

AWS services configurations

Type

Default

An Amazon Web Services region that hosts the given service.

It overrides region provider chain with static value of region with which the service client should communicate.

If not set, region is retrieved via the default providers chain in the following order:

  • aws.region system property

  • region property from the profile file

  • Instance profile file

See software.amazon.awssdk.regions.Region for available regions.

Environment variable: QUARKUS_SFN_AWS_REGION

Region

Configure the credentials provider that should be used to authenticate with AWS.

Available values:

  • default - the provider will attempt to identify the credentials automatically using the following checks:

    • Java System Properties - aws.accessKeyId and aws.secretAccessKey

    • Environment Variables - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY

    • Credential profiles file at the default location (~/.aws/credentials) shared by all AWS SDKs and the AWS CLI

    • Credentials delivered through the Amazon EC2 container service if AWS_CONTAINER_CREDENTIALS_RELATIVE_URI environment variable is set and security manager has permission to access the variable.

    • Instance profile credentials delivered through the Amazon EC2 metadata service

  • static - the provider that uses the access key and secret access key specified in the static-provider section of the config.

  • system-property - it loads credentials from the aws.accessKeyId, aws.secretAccessKey and aws.sessionToken system properties.

  • env-variable - it loads credentials from the AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY and AWS_SESSION_TOKEN environment variables.

  • profile - credentials are based on AWS configuration profiles. This loads credentials from a profile file, allowing you to share multiple sets of AWS security credentials between different tools like the AWS SDK for Java and the AWS CLI.

  • container - It loads credentials from a local metadata service. Containers currently supported by the AWS SDK are Amazon Elastic Container Service (ECS) and AWS Greengrass

  • instance-profile - It loads credentials from the Amazon EC2 Instance Metadata Service.

  • process - Credentials are loaded from an external process. This is used to support the credential_process setting in the profile credentials file. See Sourcing Credentials From External Processes for more information.

  • anonymous - It always returns anonymous AWS credentials. Anonymous AWS credentials result in un-authenticated requests and will fail unless the resource or API’s policy has been configured to specifically allow anonymous access.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_TYPE

default, static, system-property, env-variable, profile, container, instance-profile, process, custom, anonymous

default

Default credentials provider configuration

Type

Default

Whether this provider should fetch credentials asynchronously in the background.

If this is true, threads are less likely to block, but additional resources are used to maintain the provider.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_DEFAULT_PROVIDER_ASYNC_CREDENTIAL_UPDATE_ENABLED

boolean

false

Whether the provider should reuse the last successful credentials provider in the chain.

Reusing the last successful credentials provider will typically return credentials faster than searching through the chain.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_DEFAULT_PROVIDER_REUSE_LAST_PROVIDER_ENABLED

boolean

true

Static credentials provider configuration

Type

Default

AWS Access key id

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_STATIC_PROVIDER_ACCESS_KEY_ID

string

AWS Secret access key

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_STATIC_PROVIDER_SECRET_ACCESS_KEY

string

AWS Session token

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_STATIC_PROVIDER_SESSION_TOKEN

string

AWS Profile credentials provider configuration

Type

Default

The name of the profile that should be used by this credentials provider.

If not specified, the value in AWS_PROFILE environment variable or aws.profile system property is used and defaults to default name.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_PROFILE_PROVIDER_PROFILE_NAME

string

Process credentials provider configuration

Type

Default

Whether the provider should fetch credentials asynchronously in the background.

If this is true, threads are less likely to block when credentials are loaded, but additional resources are used to maintain the provider.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_PROCESS_PROVIDER_ASYNC_CREDENTIAL_UPDATE_ENABLED

boolean

false

The amount of time between when the credentials expire and when the credentials should start to be refreshed.

This allows the credentials to be refreshed *before* they are reported to expire.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_PROCESS_PROVIDER_CREDENTIAL_REFRESH_THRESHOLD

Duration

15S

The maximum size of the output that can be returned by the external process before an exception is raised.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_PROCESS_PROVIDER_PROCESS_OUTPUT_LIMIT

MemorySize

1024

The command that should be executed to retrieve credentials.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_PROCESS_PROVIDER_COMMAND

string

Custom credentials provider configuration

Type

Default

The name of custom AwsCredentialsProvider bean.

Environment variable: QUARKUS_SFN_AWS_CREDENTIALS_CUSTOM_PROVIDER_NAME

string

Sync HTTP transport configurations

Type

Default

The maximum amount of time to establish a connection before timing out.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CONNECTION_TIMEOUT

Duration

2S

The amount of time to wait for data to be transferred over an established, open connection before the connection is timed out.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_SOCKET_TIMEOUT

Duration

30S

TLS key managers provider type.

Available providers:

  • none - Use this provider if you don’t want the client to present any certificates to the remote TLS host.

  • system-property - Provider checks the standard javax.net.ssl.keyStore, javax.net.ssl.keyStorePassword, and javax.net.ssl.keyStoreType properties defined by the JSSE.

  • file-store - Provider that loads the key store from a file.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_TYPE

none, system-property, file-store

system-property

Path to the key store.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_PATH

path

Key store type.

See the KeyStore section in the https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#KeyStore[Java Cryptography Architecture Standard Algorithm Name Documentation] for information about standard keystore types.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_TYPE

string

Key store password

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_PASSWORD

string

TLS trust managers provider type.

Available providers:

  • trust-all - Use this provider to disable the validation of servers certificates and therefore trust all server certificates.

  • system-property - Provider checks the standard javax.net.ssl.keyStore, javax.net.ssl.keyStorePassword, and javax.net.ssl.keyStoreType properties defined by the JSSE.

  • file-store - Provider that loads the key store from a file.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_TYPE

trust-all, system-property, file-store

system-property

Path to the key store.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_PATH

path

Key store type.

See the KeyStore section in the https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#KeyStore[Java Cryptography Architecture Standard Algorithm Name Documentation] for information about standard keystore types.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_TYPE

string

Key store password

Environment variable: QUARKUS_SFN_SYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_PASSWORD

string

Apache HTTP client specific configurations

Type

Default

The amount of time to wait when acquiring a connection from the pool before giving up and timing out.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_CONNECTION_ACQUISITION_TIMEOUT

Duration

10S

The maximum amount of time that a connection should be allowed to remain open while idle.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_CONNECTION_MAX_IDLE_TIME

Duration

60S

The maximum amount of time that a connection should be allowed to remain open, regardless of usage frequency.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_CONNECTION_TIME_TO_LIVE

Duration

The maximum number of connections allowed in the connection pool.

Each built HTTP client has its own private connection pool.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_MAX_CONNECTIONS

int

50

Whether the client should send an HTTP expect-continue handshake before each request.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_EXPECT_CONTINUE_ENABLED

boolean

true

Whether the idle connections in the connection pool should be closed asynchronously.

When enabled, connections left idling for longer than quarkus..sync-client.connection-max-idle-time will be closed. This will not close connections currently in use.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_USE_IDLE_CONNECTION_REAPER

boolean

true

Configure whether to enable or disable TCP KeepAlive.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_TCP_KEEP_ALIVE

boolean

false

Enable HTTP proxy

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_ENABLED

boolean

false

The endpoint of the proxy server that the SDK should connect through.

Currently, the endpoint is limited to a host and port. Any other URI components will result in an exception being raised.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_ENDPOINT

URI

The username to use when connecting through a proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_USERNAME

string

The password to use when connecting through a proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_PASSWORD

string

For NTLM proxies - the Windows domain name to use when authenticating with the proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_NTLM_DOMAIN

string

For NTLM proxies - the Windows workstation name to use when authenticating with the proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_NTLM_WORKSTATION

string

Whether to attempt to authenticate preemptively against the proxy server using basic authentication.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_PREEMPTIVE_BASIC_AUTHENTICATION_ENABLED

boolean

The hosts that the client is allowed to access without going through the proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_APACHE_PROXY_NON_PROXY_HOSTS

list of string

AWS CRT-based HTTP client specific configurations

Type

Default

The maximum amount of time that a connection should be allowed to remain open while idle.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_CONNECTION_MAX_IDLE_TIME

Duration

60S

The maximum number of allowed concurrent requests.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_MAX_CONCURRENCY

int

50

Enable HTTP proxy

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_PROXY_ENABLED

boolean

false

The endpoint of the proxy server that the SDK should connect through.

Currently, the endpoint is limited to a host and port. Any other URI components will result in an exception being raised.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_PROXY_ENDPOINT

URI

The username to use when connecting through a proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_PROXY_USERNAME

string

The password to use when connecting through a proxy.

Environment variable: QUARKUS_SFN_SYNC_CLIENT_CRT_PROXY_PASSWORD

string

Async HTTP transport configurations

Type

Default

The maximum number of allowed concurrent requests.

For HTTP/1.1 this is the same as max connections. For HTTP/2 the number of connections that will be used depends on the max streams allowed per connection.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_MAX_CONCURRENCY

int

50

The maximum number of pending acquires allowed.

Once this exceeds, acquire tries will be failed.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_MAX_PENDING_CONNECTION_ACQUIRES

int

10000

The amount of time to wait for a read on a socket before an exception is thrown.

Specify 0 to disable.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_READ_TIMEOUT

Duration

30S

The amount of time to wait for a write on a socket before an exception is thrown.

Specify 0 to disable.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_WRITE_TIMEOUT

Duration

30S

The amount of time to wait when initially establishing a connection before giving up and timing out.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_CONNECTION_TIMEOUT

Duration

10S

The amount of time to wait when acquiring a connection from the pool before giving up and timing out.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_CONNECTION_ACQUISITION_TIMEOUT

Duration

2S

The maximum amount of time that a connection should be allowed to remain open, regardless of usage frequency.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_CONNECTION_TIME_TO_LIVE

Duration

The maximum amount of time that a connection should be allowed to remain open while idle.

Currently has no effect if quarkus..async-client.use-idle-connection-reaper is false.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_CONNECTION_MAX_IDLE_TIME

Duration

5S

Whether the idle connections in the connection pool should be closed.

When enabled, connections left idling for longer than quarkus..async-client.connection-max-idle-time will be closed. This will not close connections currently in use.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_USE_IDLE_CONNECTION_REAPER

boolean

true

Configure whether to enable or disable TCP KeepAlive.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TCP_KEEP_ALIVE

boolean

false

The HTTP protocol to use.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_PROTOCOL

http1-1, http2

http1-1

The SSL Provider to be used in the Netty client.

Default is OPENSSL if available, JDK otherwise.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_SSL_PROVIDER

jdk, openssl, openssl-refcnt

The maximum number of concurrent streams for an HTTP/2 connection.

This setting is only respected when the HTTP/2 protocol is used.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_HTTP2_MAX_STREAMS

long

4294967295

The initial window size for an HTTP/2 stream.

This setting is only respected when the HTTP/2 protocol is used.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_HTTP2_INITIAL_WINDOW_SIZE

int

1048576

Sets the period that the Netty client will send PING frames to the remote endpoint to check the health of the connection. To disable this feature, set a duration of 0.

This setting is only respected when the HTTP/2 protocol is used.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_HTTP2_HEALTH_CHECK_PING_PERIOD

Duration

5

Enable HTTP proxy.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_PROXY_ENABLED

boolean

false

The endpoint of the proxy server that the SDK should connect through.

Currently, the endpoint is limited to a host and port. Any other URI components will result in an exception being raised.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_PROXY_ENDPOINT

URI

The hosts that the client is allowed to access without going through the proxy.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_PROXY_NON_PROXY_HOSTS

list of string

TLS key managers provider type.

Available providers:

  • none - Use this provider if you don’t want the client to present any certificates to the remote TLS host.

  • system-property - Provider checks the standard javax.net.ssl.keyStore, javax.net.ssl.keyStorePassword, and javax.net.ssl.keyStoreType properties defined by the JSSE.

  • file-store - Provider that loads the key store from a file.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_TYPE

none, system-property, file-store

system-property

Path to the key store.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_PATH

path

Key store type.

See the KeyStore section in the https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#KeyStore[Java Cryptography Architecture Standard Algorithm Name Documentation] for information about standard keystore types.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_TYPE

string

Key store password

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_KEY_MANAGERS_PROVIDER_FILE_STORE_PASSWORD

string

TLS trust managers provider type.

Available providers:

  • trust-all - Use this provider to disable the validation of servers certificates and therefore trust all server certificates.

  • system-property - Provider checks the standard javax.net.ssl.keyStore, javax.net.ssl.keyStorePassword, and javax.net.ssl.keyStoreType properties defined by the JSSE.

  • file-store - Provider that loads the key store from a file.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_TYPE

trust-all, system-property, file-store

system-property

Path to the key store.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_PATH

path

Key store type.

See the KeyStore section in the https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html#KeyStore[Java Cryptography Architecture Standard Algorithm Name Documentation] for information about standard keystore types.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_TYPE

string

Key store password

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_TLS_TRUST_MANAGERS_PROVIDER_FILE_STORE_PASSWORD

string

Enable the custom configuration of the Netty event loop group.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_EVENT_LOOP_OVERRIDE

boolean

false

Number of threads to use for the event loop group.

If not set, the default Netty thread count is used (which is double the number of available processors unless the io.netty.eventLoopThreads system property is set.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_EVENT_LOOP_NUMBER_OF_THREADS

int

The thread name prefix for threads created by this thread factory used by event loop group.

The prefix will be appended with a number unique to the thread factory and a number unique to the thread.

If not specified it defaults to aws-java-sdk-NettyEventLoop

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_EVENT_LOOP_THREAD_NAME_PREFIX

string

Whether the default thread pool should be used to complete the futures returned from the HTTP client request.

When disabled, futures will be completed on the Netty event loop thread.

Environment variable: QUARKUS_SFN_ASYNC_CLIENT_ADVANCED_USE_FUTURE_COMPLETION_THREAD_POOL

boolean

true

About the Duration format

To write duration values, use the standard java.time.Duration format. See the Duration#parse() Java API documentation for more information.

You can also use a simplified format, starting with a number:

  • If the value is only a number, it represents time in seconds.

  • If the value is a number followed by ms, it represents time in milliseconds.

In other cases, the simplified format is translated to the java.time.Duration format for parsing:

  • If the value is a number followed by h, m, or s, it is prefixed with PT.

  • If the value is a number followed by d, it is prefixed with P.

About the MemorySize format

A size configuration option recognises string in this format (shown as a regular expression): [0-9]+[KkMmGgTtPpEeZzYy]?. If no suffix is given, assume bytes.