mirror of https://github.com/dapr/quickstarts.git
79 lines
2.8 KiB
C#
79 lines
2.8 KiB
C#
using Dapr.Client;
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using Dapr.Workflow;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.DependencyInjection;
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using System;
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using WorkflowConsoleApp.Activities;
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using WorkflowConsoleApp.Models;
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using WorkflowConsoleApp.Workflows;
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const string StoreName = "statestore";
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const string DaprWorkflowComponent = "dapr";
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// The workflow host is a background service that connects to the sidecar over gRPC
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var builder = Host.CreateDefaultBuilder(args).ConfigureServices(services =>
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{
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services.AddDaprWorkflow(options =>
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{
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// Note that it's also possible to register a lambda function as the workflow
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// or activity implementation instead of a class.
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options.RegisterWorkflow<OrderProcessingWorkflow>();
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// These are the activities that get invoked by the workflow(s).
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options.RegisterActivity<NotifyActivity>();
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options.RegisterActivity<ReserveInventoryActivity>();
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options.RegisterActivity<ProcessPaymentActivity>();
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options.RegisterActivity<UpdateInventoryActivity>();
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});
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});
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// Start the app - this is the point where we connect to the Dapr sidecar
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using var host = builder.Build();
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host.Start();
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using var daprClient = new DaprClientBuilder().Build();
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// NOTE: WorkflowEngineClient will be replaced with a richer version of DaprClient
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// in a subsequent SDK release. This is a temporary workaround.
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WorkflowEngineClient workflowClient = host.Services.GetRequiredService<WorkflowEngineClient>();
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// Generate a unique ID for the workflow
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string orderId = Guid.NewGuid().ToString()[..8];
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string itemToPurchase = "Cars";
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int ammountToPurchase = 10;
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// Populate the store with items
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RestockInventory(itemToPurchase);
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// Construct the order
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OrderPayload orderInfo = new OrderPayload(itemToPurchase, 15000, ammountToPurchase);
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// Start the workflow
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Console.WriteLine("Starting workflow {0} purchasing {1} {2}", orderId, ammountToPurchase, itemToPurchase);
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await daprClient.StartWorkflowAsync(
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workflowComponent: DaprWorkflowComponent,
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workflowName: nameof(OrderProcessingWorkflow),
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input: orderInfo,
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instanceId: orderId);
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// Wait for the workflow to start and confirm the input
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GetWorkflowResponse state = await daprClient.WaitForWorkflowStartAsync(
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instanceId: orderId,
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workflowComponent: DaprWorkflowComponent);
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Console.WriteLine("Your workflow has started. Here is the status of the workflow: {0}", state.RuntimeStatus);
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// Wait for the workflow to complete
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state = await daprClient.WaitForWorkflowCompletionAsync(
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instanceId: orderId,
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workflowComponent: DaprWorkflowComponent);
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Console.WriteLine("Workflow Status: {0}", state.RuntimeStatus);
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void RestockInventory(string itemToPurchase)
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{
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daprClient.SaveStateAsync<OrderPayload>(StoreName, itemToPurchase, new OrderPayload(Name: itemToPurchase, TotalCost: 15000, Quantity: 100));
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return;
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}
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