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messaging-patterns

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Mis à jour23 mai 2026 à 08:41

Inbox/Outbox implementation rules, MessageConstants usage, and partition assignment for CoreBankDemo. **When to use:** - When implementing or reviewing Inbox/Outbox processors in CoreBankDemo. - When you need to ensure correct usage of MessageConstants or partition assignment logic. **When NOT to use:** - Do NOT use for messaging patterns outside CoreBankDemo or for unrelated architectures. - Do NOT use for ad-hoc message handling that does not use the provided base classes.

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loekd/CoreBankDemo

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SKILL.md

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name

messaging-patterns

description

Inbox and Outbox processors

Always inherit from the base classes in CoreBankDemo.Messaging:

InboxProcessorBase<TMessage, TDbContext>
OutboxProcessorBase<TMessage, TDbContext>

Override LockNamePrefix and ProcessMessageAsync. Reference implementation: CoreBankAPI/Inbox/InboxProcessor.cs.

Never bypass the base classes and reimplement polling or locking logic.

MessageConstants — no magic strings

MessageConstants.Status.Pending / Processing / Completed / Failed

MessageConstants.Defaults.MaxRetryCount       // 5
MessageConstants.Defaults.BatchSize           // 10
MessageConstants.Defaults.PollingInterval     // 5 s
MessageConstants.Defaults.ProcessingTimeout  // 5 min

Partition assignment

int partitionId = PartitionHelper.GetPartitionId(idempotencyKey, partitionCount);

Always use PartitionHelper — never write a second implementation.

Key files

File	Purpose
`CoreBankDemo.Messaging/MessageConstants.cs`	All status strings and defaults
`CoreBankDemo.Messaging/PartitionHelper.cs`	FNV-1a partition hashing
`CoreBankDemo.Messaging/Inbox/InboxProcessorBase.cs`	Base inbox service
`CoreBankDemo.Messaging/Outbox/OutboxProcessorBase.cs`	Base outbox service
`CoreBankDemo.CoreBankAPI/Inbox/InboxProcessor.cs`	Reference inbox implementation
`CoreBankDemo.PaymentsAPI/Outbox/OutboxProcessor.cs`	Reference outbox implementation

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Coding conventions for CoreBankDemo: database, time, HTTP/business logic separation, validation, and logging. **When to use:** - When writing or reviewing code for CoreBankDemo to ensure consistency in database usage, time handling, controller/business logic separation, validation, and logging. - When you need to check or enforce project-wide coding standards. **When NOT to use:** - Do NOT use for framework-agnostic or non-CoreBankDemo projects. - Do NOT use for runtime troubleshooting or debugging—use the relevant skills for those tasks.

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OpenTelemetry tracing rules for CoreBankDemo: ActivitySource registration, span creation, and trace context propagation. **When to use:** - When adding or reviewing tracing, ActivitySource, or span logic in CoreBankDemo. - When ensuring trace context propagation and distributed tracing best practices are followed. **When NOT to use:** - Do NOT use for tracing unrelated to CoreBankDemo or for non-OpenTelemetry tracing systems. - Do NOT use for runtime log inspection or debugging—use the aspire-mcp skill for those tasks.

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name

messaging-patterns

description

Inbox and Outbox processors

Always inherit from the base classes in CoreBankDemo.Messaging:

InboxProcessorBase<TMessage, TDbContext>
OutboxProcessorBase<TMessage, TDbContext>

Override LockNamePrefix and ProcessMessageAsync. Reference implementation: CoreBankAPI/Inbox/InboxProcessor.cs.

Never bypass the base classes and reimplement polling or locking logic.

MessageConstants — no magic strings

MessageConstants.Status.Pending / Processing / Completed / Failed

MessageConstants.Defaults.MaxRetryCount       // 5
MessageConstants.Defaults.BatchSize           // 10
MessageConstants.Defaults.PollingInterval     // 5 s
MessageConstants.Defaults.ProcessingTimeout  // 5 min

Partition assignment

int partitionId = PartitionHelper.GetPartitionId(idempotencyKey, partitionCount);

Always use PartitionHelper — never write a second implementation.

Key files

File	Purpose
`CoreBankDemo.Messaging/MessageConstants.cs`	All status strings and defaults
`CoreBankDemo.Messaging/PartitionHelper.cs`	FNV-1a partition hashing
`CoreBankDemo.Messaging/Inbox/InboxProcessorBase.cs`	Base inbox service
`CoreBankDemo.Messaging/Outbox/OutboxProcessorBase.cs`	Base outbox service
`CoreBankDemo.CoreBankAPI/Inbox/InboxProcessor.cs`	Reference inbox implementation
`CoreBankDemo.PaymentsAPI/Outbox/OutboxProcessor.cs`	Reference outbox implementation