93 lines
3.7 KiB
C#
93 lines
3.7 KiB
C#
using System;
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using System.Threading.Tasks;
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using Elsa.Activities.Console.Extensions;
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using Elsa.Extensions;
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using Elsa.Models;
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using Elsa.Persistence;
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using Elsa.Persistence.EntityFrameworkCore;
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using Elsa.Persistence.EntityFrameworkCore.CustomSchema;
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using Elsa.Persistence.EntityFrameworkCore.DbContexts;
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using Elsa.Persistence.EntityFrameworkCore.Extensions;
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using Elsa.Runtime;
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using Elsa.Services;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Infrastructure;
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using Microsoft.Extensions.DependencyInjection;
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namespace Sample23
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{
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/// <summary>
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/// A simple demonstration of using Entity Framework Core persistence providers.
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/// To run the EF migration, first run the following command: `dotnet ef database update`.
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/// </summary>
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public class Program
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{
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public static async Task Main(string[] args)
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{
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var services = BuildServices();
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// Invoke startup tasks.
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var startupRunner = services.GetRequiredService<IStartupRunner>();
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await startupRunner.StartupAsync();
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using var scope = services.CreateScope();
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var dbContext = scope.ServiceProvider.GetRequiredService<ElsaContext>();
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// Ensure DB exists.
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await dbContext.Database.EnsureCreatedAsync();
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// Create a workflow definition.
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var registry = services.GetService<IWorkflowRegistry>();
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var workflowDefinition = await registry.GetWorkflowDefinitionAsync<HelloWorldWorkflow>();
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// Mark this definition as the "latest" version.
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workflowDefinition.IsLatest = true;
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workflowDefinition.Version = 1;
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// Persist the workflow definition.
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var definitionStore = scope.ServiceProvider.GetRequiredService<IWorkflowDefinitionStore>();
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await definitionStore.SaveAsync(workflowDefinition);
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// Flush to DB.
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await dbContext.SaveChangesAsync();
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// Load the workflow definition.
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workflowDefinition = await definitionStore.GetByIdAsync(
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workflowDefinition.DefinitionId,
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VersionOptions.Latest);
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// Execute the workflow.
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var invoker = scope.ServiceProvider.GetRequiredService<IWorkflowInvoker>();
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var executionContext = await invoker.StartAsync(workflowDefinition);
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// Persist the workflow instance.
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var instanceStore = scope.ServiceProvider.GetRequiredService<IWorkflowInstanceStore>();
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var workflowInstance = executionContext.Workflow.ToInstance();
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await instanceStore.SaveAsync(workflowInstance);
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// Flush to DB.
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await dbContext.SaveChangesAsync();
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}
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private static IServiceProvider BuildServices()
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{
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return new ServiceCollection()
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.AddElsa(
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elsaBuilder =>
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elsaBuilder.AddCustomSchema("elsa")
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.AddEntityFrameworkStores(
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options => options
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.UseSqlite(@"Data Source=c:\data\elsa.entity-framework-core.db;Cache=Shared",
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x =>
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{
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x.AddCustomSchemaModelSupport(options, elsaBuilder.Services);
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x.MigrationsAssembly(typeof(Program).Assembly.FullName);
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x.MigrationsHistoryTableWithSchema(options);
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})))
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.AddStartupRunner()
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.AddConsoleActivities()
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.AddWorkflow<HelloWorldWorkflow>()
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.BuildServiceProvider();
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}
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}
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} |