Workflow Core is a light weight workflow engine targeting .NET Standard. Think: long running processes with multiple tasks that need to track state. It supports pluggable persistence and concurrency providers to allow for multi-node clusters.
See Tutorial here.
Define your workflows with the fluent API.
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<Task1>()
.Then<Task2>()
.Then<Task3>();
}
}Define your workflows in JSON
{
"Id": "HelloWorld",
"Version": 1,
"Steps": [
{
"Id": "Hello",
"StepType": "MyApp.HelloWorld, MyApp",
"NextStepId": "Bye"
},
{
"Id": "Bye",
"StepType": "MyApp.GoodbyeWorld, MyApp"
}
]
}- New user workflow
public class MyData
{
public string Email { get; set; }
public string Password { get; set; }
public string UserId { get; set; }
}
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<CreateUser>()
.Input(step => step.Email, data => data.Email)
.Input(step => step.Password, data => data.Password)
.Output(data => data.UserId, step => step.UserId)
.Then<SendConfirmationEmail>()
.WaitFor("confirmation", data => data.UserId)
.Then<UpdateUser>()
.Input(step => step.UserId, data => data.UserId);
}
}- Saga Transactions
public class MyWorkflow : IWorkflow
{
public void Build(IWorkflowBuilder<MyData> builder)
{
builder
.StartWith<CreateCustomer>()
.Then<PushToSalesforce>()
.OnError(WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10))
.Then<PushToERP>()
.OnError(WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10));
}
}builder
.StartWith<LogStart>()
.Saga(saga => saga
.StartWith<Task1>()
.CompensateWith<UndoTask1>()
.Then<Task2>()
.CompensateWith<UndoTask2>()
.Then<Task3>()
.CompensateWith<UndoTask3>()
)
.OnError(Models.WorkflowErrorHandling.Retry, TimeSpan.FromMinutes(10))
.Then<LogEnd>();Since workflows are typically long running processes, they will need to be persisted to storage between steps. There are several persistence providers available as separate Nuget packages.
- MemoryPersistenceProvider (Default provider, for demo and testing purposes)
- MongoDB
- Amazon DynamoDB
- SQL Server
- PostgreSQL
- Sqlite
- MySQL
- Redis
A search index provider can be plugged in to Workflow Core, enabling you to index your workflows and search against the data and state of them. These are also available as separate Nuget packages.
- Daniel Gerlag - Initial work
- Jackie Ja
- Aaron Scribner
- Roberto Paterlini
This project is licensed under the MIT License - see the LICENSE.md file for details