Loading Workflows from JSON

1. Generate a new Console application using the following command:

   dotnet new console -n "ElsaConsole" -f net8.0 cd ElsaConsole dotnet add package Elsa dotnet add package Elsa.Testing.Shared

2. Here's a complete Program.cs file that demonstrates how to load a workflow from a JSON file and execute it:

   Program.cs

   using Elsa.Extensions; using Elsa.Testing.Shared; using Elsa.Workflows.Contracts; using Elsa.Workflows.Management.Mappers; using Elsa.Workflows.Management.Models; using Microsoft.Extensions.DependencyInjection; // Setup service container. var services = new ServiceCollection(); // Add Elsa services. services.AddElsa(); // Build service container. var serviceProvider = services.BuildServiceProvider(); // Populate registries. This is only necessary for applications that are not using hosted services. await serviceProvider.PopulateRegistriesAsync(); // Import a workflow from a JSON file. var workflowJson = await File.ReadAllTextAsync("HelloWorld.json"); // Get a serializer to deserialize the workflow. var serializer = serviceProvider.GetRequiredService<IActivitySerializer>(); // Deserialize the workflow model. var workflowDefinitionModel = serializer.Deserialize<WorkflowDefinitionModel>(workflowJson); // Map the model to a Workflow object. var workflowDefinitionMapper = serviceProvider.GetRequiredService<WorkflowDefinitionMapper>(); var workflow = workflowDefinitionMapper.Map(workflowDefinitionModel); // Resolve a workflow runner to run the workflow. var workflowRunner = serviceProvider.GetRequiredService<IWorkflowRunner>(); // Run the workflow. await workflowRunner.RunAsync(workflow);

3. Create a new file called HelloWorld.json in the root of the project and make sure it is configured to be copied to the output directory. HelloWorld.json

   { "id": "HelloWorld-v1", "definitionId": "HelloWorld", "name": "Hello World", "isLatest": true, "isPublished": true, "root": { "id": "Flowchart1", "type": "Elsa.Flowchart", "activities": [ { "id": "WriteLine1", "type": "Elsa.WriteLine", "text": { "typeName": "String", "expression": { "type": "Literal", "value": "Hello World!" } } } ] } }

4. Run the program using the following command:

   dotnet run

The console should output the following:

1. Setup an Elsa Server project.

2. Create a new folder called Workflows

3. Create a new file called HelloWorld.json in the root of the project and make sure it is configured to be copied to the output directory. HelloWorld.json

   { "id": "HelloWorld-v1", "definitionId": "HelloWorld", "name": "Hello World", "isLatest": true, "isPublished": true, "root": { "id": "Flowchart1", "type": "Elsa.Flowchart", "activities": [ { "id": "WriteLine1", "type": "Elsa.WriteLine", "text": { "typeName": "String", "expression": { "type": "Literal", "value": "Hello World!" } } } ] } }

4. Run the application using the following command:

   dotnet run --urls "https://localhost:5001"

5. Execute the workflow using the following curl:

   curl --location --request POST 'https://localhost:5001/elsa/api/workflow-definitions/HelloWorld/execute' \ --header 'Authorization: ApiKey {your-api-key}'

   Alternatively, start ab Elsa Studio container and run the workflow from there