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Add distributed locking to MassTransitWorkflowDispatcher #5418

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May 21, 2024
Merged

Add distributed locking to MassTransitWorkflowDispatcher #5418

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4 changes: 4 additions & 0 deletions src/modules/Elsa.MassTransit/Services/MassTransitWorkflowDispatcher.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
using Elsa.Workflows.Runtime.Requests;
using Elsa.Workflows.Runtime.Responses;
using MassTransit;
using Medallion.Threading;
using Microsoft.Extensions.Logging;

namespace Elsa.MassTransit.Services;
Expand All @@ -26,6 +27,7 @@ public class MassTransitWorkflowDispatcher(
IBookmarkHasher bookmarkHasher,
ITriggerStore triggerStore,
IBookmarkStore bookmarkStore,
IDistributedLockProvider distributedLockProvider,
ILogger<MassTransitWorkflowDispatcher> logger)
: IWorkflowDispatcher
{
Expand Down Expand Up @@ -163,6 +165,8 @@ private async Task DispatchBookmarksAsync(IEnumerable<StoredBookmark> bookmarks,

if (input != null || properties != null)
{
// Need to acquire a lock on the workflow instance to prevent concurrent updates.
await using var distributedLock = await distributedLockProvider.AcquireLockAsync(workflowInstanceId, TimeSpan.FromMinutes(2), cancellationToken);
var workflowInstance = await workflowInstanceManager.FindByIdAsync(workflowInstanceId, cancellationToken);

if (workflowInstance == null)
Expand Down
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