Refactored background job executer.

framework/Volo.Abp.sln

@@ -198,7 +198,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.BackgroundJobs", "
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.BackgroundWorkers", "src\Volo.Abp.BackgroundWorkers\Volo.Abp.BackgroundWorkers.csproj", "{6C3E76B8-C4DA-4E74-9F8B-A8BC4C831722}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Volo.Abp.BackgroundJobs.Tests", "test\Volo.Abp.BackgroundJobs.Tests\Volo.Abp.BackgroundJobs.Tests.csproj", "{D86548EA-7047-4623-8824-F6285CD254AA}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Volo.Abp.BackgroundJobs.Tests", "test\Volo.Abp.BackgroundJobs.Tests\Volo.Abp.BackgroundJobs.Tests.csproj", "{D86548EA-7047-4623-8824-F6285CD254AA}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

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

@@ -1,21 +1,15 @@
 using System;
 using System.Runtime.Serialization;
-using JetBrains.Annotations;
 
 namespace Volo.Abp.BackgroundJobs
 {
     [Serializable]
     public class BackgroundJobException : AbpException
     {
-        [CanBeNull]
-        public BackgroundJobInfo BackgroundJob { get; set; }
+        public string JobName { get; set; }
 
-        [CanBeNull]
-        public object JobObject { get; set; }
+        public string JobArgs { get; set; }
 
-        /// <summary>
-        /// Creates a new <see cref="BackgroundJobException"/> object.
-        /// </summary>
         public BackgroundJobException()
         {
 

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

@@ -5,8 +5,6 @@ using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Options;
 using Volo.Abp.DependencyInjection;
-using Volo.Abp.Threading;
-using Volo.Abp.Timing;
 
 namespace Volo.Abp.BackgroundJobs
 {
@@ -15,120 +13,58 @@ namespace Volo.Abp.BackgroundJobs
         public ILogger<BackgroundJobExecuter> Logger { protected get; set; }
 
         protected IServiceProvider ServiceProvider { get; }
-        protected IClock Clock { get; }
         protected IBackgroundJobSerializer Serializer { get; }
-        protected IBackgroundJobStore Store { get; }
         protected BackgroundJobOptions Options { get; }
 
         public BackgroundJobExecuter(
             IServiceProvider serviceProvider,
-            IClock clock,
             IBackgroundJobSerializer serializer,
-            IBackgroundJobStore store,
             IOptions<BackgroundJobOptions> options)
         {
             ServiceProvider = serviceProvider;
-            Clock = clock;
             Serializer = serializer;
             Options = options.Value;
-            Store = store;
 
             Logger = NullLogger<BackgroundJobExecuter>.Instance;
         }
 
-        public virtual void Execute(BackgroundJobInfo jobInfo)
+        public virtual void Execute(JobExecutionContext context)
         {
             //TODO: Refactor (split to multiple methods).
 
-            try
+            var jobType = Options.GetJobType(context.JobName);
+
+            using (var scope = ServiceProvider.CreateScope())
             {
-                jobInfo.TryCount++;
-                jobInfo.LastTryTime = Clock.Now;
+                var job = scope.ServiceProvider.GetService(jobType);
+                if (job == null)
+                {
+                    throw new AbpException("The job type is not registered to DI: " + jobType);
+                }
 
-                var jobType = Options.GetJobType(jobInfo.JobName);
+                var jobExecuteMethod = job.GetType().GetMethod("Execute");
+                Debug.Assert(jobExecuteMethod != null, nameof(jobExecuteMethod) + " != null");
+                var argsType = jobExecuteMethod.GetParameters()[0].ParameterType;
+                var argsObj = Serializer.Deserialize(context.JobArgs, argsType);
 
-                using (var scope = ServiceProvider.CreateScope())
+                try
                 {
-                    var job = scope.ServiceProvider.GetService(jobType);
-                    if (job == null)
-                    {
-                        throw new AbpException("The job type is not registered to DI: " + jobType);
-                    }
+                    jobExecuteMethod.Invoke(job, new[] { argsObj });
+                }
+                catch (Exception ex)
+                {
+                    context.Result = JobExecutionResult.Failed;
 
-                    var jobExecuteMethod = job.GetType().GetMethod("Execute");
-                    Debug.Assert(jobExecuteMethod != null, nameof(jobExecuteMethod) + " != null");
-                    var argsType = jobExecuteMethod.GetParameters()[0].ParameterType;
-                    var argsObj = Serializer.Deserialize(jobInfo.JobArgs, argsType);
+                    Logger.LogException(ex);
 
-                    try
+                    //TODO: Somehow trigger an event for the exception (may create an Volo.Abp.ExceptionHandling package)!
+                    var backgroundJobException = new BackgroundJobException("A background job execution is failed. See inner exception for details.", ex)
                     {
-                        jobExecuteMethod.Invoke(job, new[] { argsObj });
-                        AsyncHelper.RunSync(() => Store.DeleteAsync(jobInfo.Id));
-                    }
-                    catch (Exception ex)
-                    {
-                        Logger.LogException(ex);
-
-                        var nextTryTime = CalculateNextTryTime(jobInfo);
-                        if (nextTryTime.HasValue)
-                        {
-                            jobInfo.NextTryTime = nextTryTime.Value;
-                        }
-                        else
-                        {
-                            jobInfo.IsAbandoned = true;
-                        }
-
-                        TryUpdate(jobInfo);
-
-                        var backgroundJobException = new BackgroundJobException(
-                            "A background job execution is failed. See inner exception for details. See BackgroundJob property to get information on the background job.",
-                            ex
-                        )
-                        {
-                            BackgroundJob = jobInfo,
-                            JobObject = job
-                        };
-
-                        //TODO: Somehow trigger an event for the exception (may create an Volo.Abp.ExceptionHandling package)!
-                    }
+                        JobName = context.JobName,
+                        JobArgs = context.JobArgs
+                    };
                 }
             }
-            catch (Exception ex)
-            {
-                Logger.LogException(ex);
-
-                jobInfo.IsAbandoned = true;
-
-                TryUpdate(jobInfo);
-            }
-        }
-
-        protected virtual void TryUpdate(BackgroundJobInfo jobInfo)
-        {
-            try
-            {
-                Store.UpdateAsync(jobInfo);
-            }
-            catch (Exception updateEx)
-            {
-                Logger.LogException(updateEx);
-            }
-        }
-
-        protected virtual DateTime? CalculateNextTryTime(BackgroundJobInfo jobInfo) //TODO: Move to another place to override easier
-        {
-            var nextWaitDuration = Options.DefaultFirstWaitDuration * (Math.Pow(Options.DefaultWaitFactor, jobInfo.TryCount - 1));
-            var nextTryDate = jobInfo.LastTryTime.HasValue
-                ? jobInfo.LastTryTime.Value.AddSeconds(nextWaitDuration)
-                : Clock.Now.AddSeconds(nextWaitDuration);
-
-            if (nextTryDate.Subtract(jobInfo.CreationTime).TotalSeconds > Options.DefaultTimeout)
-            {
-                return null;
-            }
-
-            return nextTryDate;
         }
     }
 }

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

@@ -49,6 +49,7 @@ namespace Volo.Abp.BackgroundJobs
         {
             JobTypes = new Dictionary<string, Type>();
 
+            JobPollPeriod = 5000;
             DefaultFirstWaitDuration = 60;
             DefaultTimeout = 172800;
             DefaultWaitFactor = 2.0;

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

@@ -1,7 +1,10 @@
-using Microsoft.Extensions.Options;
+using System;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
 using Volo.Abp.BackgroundWorkers;
 using Volo.Abp.DependencyInjection;
 using Volo.Abp.Threading;
+using Volo.Abp.Timing;
 
 namespace Volo.Abp.BackgroundJobs
 {
@@ -10,7 +13,8 @@ namespace Volo.Abp.BackgroundJobs
         protected IBackgroundJobExecuter JobExecuter { get; }
         protected IBackgroundJobStore Store { get; }
         protected BackgroundJobOptions Options { get; }
-        
+        protected IClock Clock { get; }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="BackgroundJobManager"/> class.
         /// </summary>
@@ -18,10 +22,12 @@ namespace Volo.Abp.BackgroundJobs
             IBackgroundJobStore store,
             AbpTimer timer,
             IBackgroundJobExecuter jobExecuter,
-            IOptions<BackgroundJobOptions> options)
+            IOptions<BackgroundJobOptions> options,
+            IClock clock)
             : base(timer)
         {
             JobExecuter = jobExecuter;
+            Clock = clock;
             Store = store;
             Options = options.Value;
             Timer.Period = Options.JobPollPeriod;
@@ -31,10 +37,71 @@ namespace Volo.Abp.BackgroundJobs
         {
             var waitingJobs = AsyncHelper.RunSync(() => Store.GetWaitingJobsAsync(Options.MaxJobFetchCount));
 
-            foreach (var job in waitingJobs)
+            foreach (var jobInfo in waitingJobs)
+            {
+                jobInfo.TryCount++;
+                jobInfo.LastTryTime = Clock.Now;
+
+                var context = new JobExecutionContext(jobInfo.JobName, jobInfo.JobArgs);
+
+                try
+                {
+                    JobExecuter.Execute(context);
+
+                    if (context.Result == JobExecutionResult.Success)
+                    {
+                        AsyncHelper.RunSync(() => Store.DeleteAsync(jobInfo.Id));
+                    }
+                    else if (context.Result == JobExecutionResult.Failed)
+                    {
+
+                        var nextTryTime = CalculateNextTryTime(jobInfo);
+                        if (nextTryTime.HasValue)
+                        {
+                            jobInfo.NextTryTime = nextTryTime.Value;
+                        }
+                        else
+                        {
+                            jobInfo.IsAbandoned = true;
+                        }
+
+                        TryUpdate(jobInfo);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Logger.LogException(ex);
+                    jobInfo.IsAbandoned = true;
+                    TryUpdate(jobInfo);
+                }
+            }
+        }
+
+        protected virtual void TryUpdate(BackgroundJobInfo jobInfo)
+        {
+            try
+            {
+                Store.UpdateAsync(jobInfo);
+            }
+            catch (Exception updateEx)
+            {
+                Logger.LogException(updateEx);
+            }
+        }
+
+        protected virtual DateTime? CalculateNextTryTime(BackgroundJobInfo jobInfo) //TODO: Move to another place to override easier
+        {
+            var nextWaitDuration = Options.DefaultFirstWaitDuration * (Math.Pow(Options.DefaultWaitFactor, jobInfo.TryCount - 1));
+            var nextTryDate = jobInfo.LastTryTime.HasValue
+                ? jobInfo.LastTryTime.Value.AddSeconds(nextWaitDuration)
+                : Clock.Now.AddSeconds(nextWaitDuration);
+
+            if (nextTryDate.Subtract(jobInfo.CreationTime).TotalSeconds > Options.DefaultTimeout)
             {
-                JobExecuter.Execute(job);
+                return null;
             }
+
+            return nextTryDate;
         }
     }
 }

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

@@ -2,6 +2,6 @@
 {
     public interface IBackgroundJobExecuter
     {
-        void Execute(BackgroundJobInfo jobInfo);
+        void Execute(JobExecutionContext context);
     }
 }

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

@@ -0,0 +1,18 @@
+namespace Volo.Abp.BackgroundJobs
+{
+    public class JobExecutionContext
+    {
+        public string JobName { get; }
+
+        public string JobArgs { get; }
+
+        public JobExecutionResult Result { get; set; }
+
+        public JobExecutionContext(string jobName, string jobArgs)
+        {
+            JobName = jobName;
+            JobArgs = jobArgs;
+            Result = JobExecutionResult.Success;
+        }
+    }
+}

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

@@ -0,0 +1,8 @@
+namespace Volo.Abp.BackgroundJobs
+{
+    public enum JobExecutionResult
+    {
+        Success,
+        Failed
+    }
+}

framework/test/Volo.Abp.BackgroundJobs.Tests/Volo/Abp/BackgroundJobs/BackgroundJobExecuter_Tests.cs

@@ -1,5 +1,6 @@
 using System.Threading.Tasks;
 using Shouldly;
+using Volo.Abp.Json;
 using Xunit;
 
 namespace Volo.Abp.BackgroundJobs
@@ -7,14 +8,12 @@ namespace Volo.Abp.BackgroundJobs
     public class BackgroundJobExecuter_Tests : BackgroundJobsTestBase
     {
         private readonly IBackgroundJobExecuter _backgroundJobExecuter;
-        private readonly IBackgroundJobManager _backgroundJobManager;
-        private readonly IBackgroundJobStore _backgroundJobStore;
+        private readonly IJsonSerializer _jsonSerializer;
 
         public BackgroundJobExecuter_Tests()
         {
             _backgroundJobExecuter = GetRequiredService<IBackgroundJobExecuter>();
-            _backgroundJobManager = GetRequiredService<IBackgroundJobManager>();
-            _backgroundJobStore = GetRequiredService<IBackgroundJobStore>();
+            _jsonSerializer = GetRequiredService<IJsonSerializer>();
         }
 
         [Fact]
@@ -25,21 +24,18 @@ namespace Volo.Abp.BackgroundJobs
             var jobObject = GetRequiredService<MyJob>();
             jobObject.ExecutedValues.ShouldBeEmpty();
 
-            var jobId = await _backgroundJobManager.EnqueueAsync(new MyJobArgs("42"));
-
-            var job = await _backgroundJobStore.FindAsync(jobId);
-            job.ShouldNotBeNull();
-
             //Act
 
-            _backgroundJobExecuter.Execute(job);
+            _backgroundJobExecuter.Execute(
+                new JobExecutionContext(
+                    BackgroundJobNameAttribute.GetName<MyJobArgs>(),
+                    _jsonSerializer.Serialize(new MyJobArgs("42"))
+                )
+            );
 
             //Assert
 
             jobObject.ExecutedValues.ShouldContain("42");
-
-            job = await _backgroundJobStore.FindAsync(jobId);
-            job.ShouldBeNull(); //Because it's deleted after the execution
         }
     }
 }