AWS providers for Workflow Core

• Provides persistence for Workflow Core using DynamoDB.
• Provides Queueing support on Workflow Core using AWS Simple Queue Service.
• Provides Distributed locking support on Workflow Core using DynamoDB.
• Provides event hub support on Workflow Core backed by AWS Kinesis.

This makes it possible to have a cluster of nodes processing your workflows.

Installing

Install the NuGet package “WorkflowCore.Providers.AWS”

PM> Install-Package WorkflowCore.Providers.AWS

Usage (Persistence, Queueing and distributed locking)

Use the IServiceCollection extension methods when building your service provider

• .UseAwsDynamoPersistence
• .UseAwsSimpleQueueService
• .UseAwsDynamoLocking

services.AddWorkflow(cfg =>
{
    cfg.UseAwsDynamoPersistence(new EnvironmentVariablesAWSCredentials(), new AmazonDynamoDBConfig() { RegionEndpoint = RegionEndpoint.USWest2 }, "table-prefix");
    cfg.UseAwsDynamoLocking(new EnvironmentVariablesAWSCredentials(), new AmazonDynamoDBConfig() { RegionEndpoint = RegionEndpoint.USWest2 }, "workflow-core-locks");
    cfg.UseAwsSimpleQueueService(new EnvironmentVariablesAWSCredentials(), new AmazonSQSConfig() { RegionEndpoint = RegionEndpoint.USWest2 }, "queues-prefix");
});

If any AWS resources do not exists, they will be automatcially created. By default, all DynamoDB tables and indexes will be provisioned with a throughput of 1, you can modify these values from the AWS console. You may also specify a prefix for the dynamo table names.

If you have a preconfigured dynamoClient, you can pass this in instead of the credentials and config

var client = new AmazonDynamoDBClient();
var sqsClient = new AmazonSQSClient();
services.AddWorkflow(cfg =>
{
    cfg.UseAwsDynamoPersistenceWithProvisionedClient(client, "table-prefix");
    cfg.UseAwsDynamoLockingWithProvisionedClient(client, "workflow-core-locks");
    cfg.UseAwsSimpleQueueServiceWithProvisionedClient(sqsClient, "queues-prefix");
});

Usage (Kinesis)

Use the the .UseAwsKinesis extension method on IServiceCollection when building your service provider

services.AddWorkflow(cfg =>
{
    cfg.UseAwsKinesis(new EnvironmentVariablesAWSCredentials(), RegionEndpoint.USWest2, "app-name", "stream-name");
});

The Kinesis provider will also create a DynamoDB table to track the postion in each shard of the Kinesis stream. A shard position will be tracked for each app name that you connect with.