Refactor background jobs.

framework/src/Volo.Abp.BackgroundJobs.Abstractions/Volo/Abp/BackgroundJobs/BackgroundJobExecuter.cs

@@ -50,7 +50,6 @@ namespace Volo.Abp.BackgroundJobs
 
                     Logger.LogException(ex);
 
-                    //TODO: Somehow trigger an event for the exception (may create an Volo.Abp.ExceptionHandling package)!
                     throw new BackgroundJobExecutionException("A background job execution is failed. See inner exception for details.", ex)
                     {
                         JobType = context.JobType.AssemblyQualifiedName,

framework/src/Volo.Abp.BackgroundJobs.HangFire/Volo/Abp/BackgroundJobs/Hangfire/HangfireBackgroundJobManager.cs

@@ -5,6 +5,7 @@ using Volo.Abp.DependencyInjection;
 
 namespace Volo.Abp.BackgroundJobs.Hangfire
 {
+    [Dependency(ReplaceServices = true)]
     public class HangfireBackgroundJobManager : IBackgroundJobManager, ITransientDependency
     {
         public Task<string> EnqueueAsync<TArgs>(TArgs args, BackgroundJobPriority priority = BackgroundJobPriority.Normal,

framework/src/Volo.Abp.BackgroundJobs/Volo/Abp/BackgroundJobs/BackgroundJobWorker.cs

@@ -18,7 +18,7 @@ namespace Volo.Abp.BackgroundJobs
         protected IBackgroundJobSerializer Serializer { get; }
 
         /// <summary>
-        /// Initializes a new instance of the <see cref="BackgroundJobManager"/> class.
+        /// Initializes a new instance of the <see cref="DefaultBackgroundJobManager"/> class.
         /// </summary>
         public BackgroundJobWorker(
             IBackgroundJobStore store,

framework/src/Volo.Abp.BackgroundJobs/Volo/Abp/BackgroundJobs/BackgroundJobManager.cs → framework/src/Volo.Abp.BackgroundJobs/Volo/Abp/BackgroundJobs/DefaultBackgroundJobManager.cs

@@ -9,7 +9,8 @@ namespace Volo.Abp.BackgroundJobs
     /// <summary>
     /// Default implementation of <see cref="IBackgroundJobManager"/>.
     /// </summary>
-    public class BackgroundJobManager : IBackgroundJobManager, ISingletonDependency
+    [Dependency(TryRegister = true)]
+    public class DefaultBackgroundJobManager : IBackgroundJobManager, ISingletonDependency
     {
         protected IClock Clock { get; }
         protected IBackgroundJobSerializer Serializer { get; }
@@ -17,9 +18,9 @@ namespace Volo.Abp.BackgroundJobs
         protected IBackgroundJobStore Store { get; }
         
         /// <summary>
-        /// Initializes a new instance of the <see cref="BackgroundJobManager"/> class.
+        /// Initializes a new instance of the <see cref="DefaultBackgroundJobManager"/> class.
         /// </summary>
-        public BackgroundJobManager(
+        public DefaultBackgroundJobManager(
             IClock clock,
             IBackgroundJobSerializer serializer,
             IBackgroundJobStore store,