Adding Rewind to the SDK Layer

src/DurableTask.ApplicationInsights/DurableTask.ApplicationInsights.csproj

@@ -11,8 +11,8 @@
     <!-- Version Info -->
     <PropertyGroup>
         <MajorVersion>0</MajorVersion>
-        <MinorVersion>7</MinorVersion>
-        <PatchVersion>1</PatchVersion>
+        <MinorVersion>8</MinorVersion>
+        <PatchVersion>0</PatchVersion>
         <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
         <FileVersion>$(VersionPrefix).0</FileVersion>
         <!-- FileVersionRevision is expected to be set by the CI. This is useful for distinguishing between multiple builds of the same version. -->

src/DurableTask.AzureStorage/DurableTask.AzureStorage.csproj

@@ -21,8 +21,8 @@
   <!-- Version Info -->
   <PropertyGroup>
     <MajorVersion>2</MajorVersion>
-    <MinorVersion>6</MinorVersion>
-    <PatchVersion>1</PatchVersion>
+    <MinorVersion>7</MinorVersion>
+    <PatchVersion>0</PatchVersion>
     <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
     <FileVersion>$(VersionPrefix).0</FileVersion>
     <!-- FileVersionRevision is expected to be set by the CI. This is useful for distinguishing between multiple builds of the same version. -->

src/DurableTask.Core/Command/OrchestratorActionType.cs

@@ -42,5 +42,10 @@ public enum OrchestratorActionType
         /// The orchestrator completed.
         /// </summary>
         OrchestrationComplete,
+
+        /// <summary>
+        /// The orchestration was rewound.
+        /// </summary>
+        RewindOrchestration,
     }
 }

src/DurableTask.Core/Command/RewindOrchestrationAction.cs

@@ -0,0 +1,25 @@
+//  ----------------------------------------------------------------------------------
+//  Copyright Microsoft Corporation
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//  http://www.apache.org/licenses/LICENSE-2.0
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//  ----------------------------------------------------------------------------------
+#nullable enable
+namespace DurableTask.Core.Command
+{
+
+    /// <summary>
+    /// Orchestrator action for rewinding orchestrations.
+    /// </summary>
+    public class RewindOrchestrationAction : OrchestratorAction
+    {
+        /// <inheritdoc/>
+        public override OrchestratorActionType OrchestratorActionType => OrchestratorActionType.RewindOrchestration;
+    }
+}

src/DurableTask.Core/DurableTask.Core.csproj

@@ -17,8 +17,8 @@
   <!-- Version Info -->
   <PropertyGroup>
     <MajorVersion>3</MajorVersion>
-    <MinorVersion>5</MinorVersion>
-    <PatchVersion>1</PatchVersion>
+    <MinorVersion>6</MinorVersion>
+    <PatchVersion>0</PatchVersion>
     <VersionPrefix>$(MajorVersion).$(MinorVersion).$(PatchVersion)</VersionPrefix>
     <FileVersion>$(VersionPrefix).0</FileVersion>
     <!-- FileVersionRevision is expected to be set by the CI. This is useful for distinguishing between multiple builds of the same version. -->

src/DurableTask.Core/History/EventType.cs

@@ -125,5 +125,10 @@ public enum EventType
         /// Orchestration was resumed event
         /// </summary>
         ExecutionResumed,
+
+        /// <summary>
+        /// Orchestration was rewound event.
+        /// </summary>
+        ExecutionRewound,
     }
 }

src/DurableTask.Core/History/ExecutionRewoundEvent.cs

@@ -0,0 +1,71 @@
+//  ----------------------------------------------------------------------------------
+//  Copyright Microsoft Corporation
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//  http://www.apache.org/licenses/LICENSE-2.0
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//  ----------------------------------------------------------------------------------
+#nullable enable
+namespace DurableTask.Core.History
+{
+    using DurableTask.Core.Tracing;
+    using System.Runtime.Serialization;
+
+    /// <summary>
+    /// Generic History event
+    /// </summary>
+    [DataContract]
+    public class ExecutionRewoundEvent : HistoryEvent, ISupportsDurableTraceContext
+    {
+        /// <summary>
+        /// Creates a new ExecutionRewoundEvent with the supplied event id and empty reason.
+        /// </summary>
+        /// <param name="eventId">The integer event id</param>
+        public ExecutionRewoundEvent(int eventId) : base(eventId) { }
+
+        /// <summary>
+        /// Creates a new ExecutionRewoundEvent with the supplied event id and reason.
+        /// </summary>
+        /// <param name="eventId">The integer event id</param>
+        /// <param name="reason">The reason for the rewind event</param>
+        public ExecutionRewoundEvent(int eventId, string? reason)
+            : base(eventId)
+        {
+            this.Reason = reason;
+        }
+
+        /// <summary>
+        /// Gets the event type
+        /// </summary>
+        public override EventType EventType => EventType.ExecutionRewound;
+
+        /// <summary>
+        /// Gets or sets the reason for the rewind event.
+        /// </summary>
+        [DataMember]
+        public string? Reason { get; set; }
+
+        /// <summary>
+        /// Gets or sets the parent execution id of the rewound suborchestration.
+        /// </summary>
+        [DataMember]
+        public string? ParentExecutionId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the instance ID of the rewound orchestration.
+        /// </summary>
+        [DataMember]
+        public string? InstanceId { get; set; }
+
+        /// <summary>
+        /// Gets or sets the parent trace context of the rewound suborchestration.
+        /// </summary>
+        [DataMember]
+        public DistributedTraceContext? ParentTraceContext { get; set; }
+    }
+}

src/DurableTask.Core/History/ExecutionStartedEvent.cs

@@ -48,6 +48,31 @@ internal ExecutionStartedEvent()
         {
         }
 
+        /// <summary>
+        /// Creates a new ExecutionStartedEvent with the same fields as <paramref name="other"/>.
+        /// A deep copy is performed on all non-base class fields.
+        /// </summary>
+        internal ExecutionStartedEvent(ExecutionStartedEvent other)
+        {
+            // Copy base class fields
+            EventId = other.EventId;
+            Timestamp = other.Timestamp;
+            ExtensionData = other.ExtensionData;
+            IsPlayed = other.IsPlayed;
+
+            // Deep copy all other fields
+            OrchestrationInstance = other.OrchestrationInstance?.Clone();
+            ParentInstance = other.ParentInstance?.Clone();
+            ParentTraceContext = other.ParentTraceContext?.Clone();
+            Input = other.Input;
+            Name = other.Name;
+            Version = other.Version;
+            Tags = other.Tags != null ? new Dictionary<string, string>(other.Tags) : null;
+            Correlation = other.Correlation;
+            ScheduledStartTime = other.ScheduledStartTime;
+            Generation = other.Generation;
+        }
+
         /// <summary>
         /// Gets the event type
         /// </summary>

src/DurableTask.Core/History/SubOrchestrationInstanceCreatedEvent.cs

@@ -30,6 +30,25 @@ public SubOrchestrationInstanceCreatedEvent(int eventId)
         {
         }
 
+        /// <summary>
+        /// Creates a new ExecutionStartedEvent with the same fields as <paramref name="other"/>.
+        /// </summary>
+        internal SubOrchestrationInstanceCreatedEvent(SubOrchestrationInstanceCreatedEvent other)
+        {
+            // Copy base class fields
+            EventId = other.EventId;
+            Timestamp = other.Timestamp;
+            ExtensionData = other.ExtensionData;
+            IsPlayed = other.IsPlayed;
+
+            // Copy all other fields
+            Name = other.Name;
+            Version = other.Version;
+            InstanceId = other.InstanceId;
+            Input = other.Input;
+            ClientSpanId = other.ClientSpanId;
+        }
+
         /// <summary>
         /// Gets the event type
         /// </summary>

src/DurableTask.Core/OrchestrationStatus.cs

@@ -56,6 +56,6 @@ public enum OrchestrationStatus
         /// <summary>
         /// Orchestration state of suspended
         /// </summary>
-        Suspended,
+        Suspended
     }
 }