Line data    Source code

       1             : #region Copyright
       2             : // // -----------------------------------------------------------------------
       3             : // // <copyright company="Chinchilla Software Limited">
       4             : // //   Copyright Chinchilla Software Limited. All rights reserved.
       5             : // // </copyright>
       6             : // // -----------------------------------------------------------------------
       7             : #endregion
       8             : 
       9             : using System;
      10             : using Cqrs.Azure.ConfigurationManager;
      11             : using Cqrs.Hosts;
      12             : #if NET472
      13             : using Microsoft.Azure.WebJobs;
      14             : #endif
      15             : #if NETCOREAPP3_0
      16             : using Microsoft.Extensions.Hosting;
      17             : #endif
      18             : 
      19             : namespace Cqrs.Azure.WebJobs
      20             : {
      21             :         /// <summary>
      22             :         /// Execute command and event handlers in an Azure WebJob
      23             :         /// </summary>
      24             :         public abstract class CqrsJobHost<TAuthenticationToken> : TelemetryCoreHost<TAuthenticationToken>
      25           1 :         {
      26             :                 /// <summary>
      27             :                 /// The <see cref="CoreHost"/> that gets executed by the Azure WebJob.
      28             :                 /// </summary>
      29             :                 protected static CoreHost<TAuthenticationToken> CoreHost { get; set; }
      30             : 
      31             : #if NET472
      32             :                 /// <summary>
      33             :                 /// An <see cref="Action"/> that is execute pre <see cref="JobHost.RunAndBlock"/>.
      34             :                 /// </summary>
      35             : #endif
      36             : #if NETCOREAPP3_0
      37             :                 /// <summary>
      38             :                 /// An <see cref="Action"/> that is execute pre <see cref="HostingAbstractionsHostExtensions.Run(IHost)"/>.
      39             :                 /// </summary>
      40             : #endif
      41             :                 protected static Action PreRunAndBlockAction { get; set; }
      42             : 
      43             :                 /// <remarks>
      44             :                 /// Please set the following connection strings in app.config for this WebJob to run:
      45             :                 /// AzureWebJobsDashboard and AzureWebJobsStorage
      46             :                 /// Better yet, add them to your Azure portal so they can be changed at runtime without re-deploying or re-compiling.
      47             :                 /// </remarks>
      48           1 :                 protected static void StartHost()
      49             :                 {
      50             :                         // We use console state as, even though a webjob runs in an azure website, it's technically loaded via something call the 'WindowsScriptHost', which is not web and IIS based so it's threading model is very different and more console based.
      51             :                         // This actually does all the work... Just sit back and relax... but also stay in memory and don't shutdown.
      52             :                         CoreHost.Run();
      53             : 
      54             : #if NET472
      55             :                         JobHost host;
      56             :                         bool disableHostControl;
      57             :                         // I set this to false ... just because.
      58             :                         if (!bool.TryParse(_configurationManager.GetSetting("Cqrs.Azure.WebJobs.DisableWebJobHostControl"), out disableHostControl))
      59             :                                 disableHostControl = false;
      60             : 
      61             :                         if (disableHostControl)
      62             :                         {
      63             :                                 var jobHostConfig = new JobHostConfiguration
      64             :                                 {
      65             :                                         // https://github.com/Azure/azure-webjobs-sdk/issues/741
      66             :                                         DashboardConnectionString = null
      67             :                                 };
      68             :                                 host = new JobHost(jobHostConfig);
      69             :                         }
      70             :                         else
      71             :                                 host = new JobHost();
      72             : 
      73             :                         if (PreRunAndBlockAction != null)
      74             :                                 PreRunAndBlockAction();
      75             : 
      76             :                         // The following code ensures that the WebJob will be running continuously
      77             :                         host.RunAndBlock();
      78             : #endif
      79             : #if NETCOREAPP3_0
      80             :                         string environment = null;
      81             :                         // I set this to false ... just because.
      82             :                         environment = _configurationManager.GetSetting("Cqrs.Azure.WebJobs.Environment");
      83             : 
      84             :                         var builder = new HostBuilder();
      85             :                         if (!string.IsNullOrWhiteSpace(environment))
      86             :                                 builder.UseEnvironment(environment);
      87             :                         builder.ConfigureWebJobs(builder =>
      88             :                         {
      89             :                                 builder.AddAzureStorageCoreServices();
      90             :                         });
      91             :                         IHost host = builder.Build();
      92             :                         using (host)
      93             :                         {
      94             :                                 host.Run();
      95             :                         }
      96             : #endif
      97             :                 }
      98             :         }
      99             : }