refactor(LookupService): add cache logic for LookupService sample

[ArgoZhang]

add cache logic for LookupService sample

Summary of the changes (Less than 80 chars)

简单描述你更改了什么, 不超过80个字符；如果有关联 Issue 请在下方填写相关编号

Description

fixes #4890

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

[是否影响老版本]

Risk

• High
• Medium
• Low

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Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Enhancements:

• Implement caching logic in DemoLookupService to improve performance by reducing redundant data retrieval.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR implements caching functionality for the LookupService by introducing a ConcurrentDictionary to store lookup items. The implementation changes the synchronous GetItemsByKey method to an asynchronous GetItemsByKeyAsync method, adding a delay to simulate database access and implementing a cache-first approach for retrieving items.

Sequence diagram for GetItemsByKeyAsync method

sequenceDiagram
    participant Client
    participant DemoLookupService
    participant Cache
    participant Database

    Client->>DemoLookupService: GetItemsByKeyAsync(key, data)
    DemoLookupService->>Cache: TryGetValue(key)
    alt Cache hit
        Cache-->>DemoLookupService: Return cached items
    else Cache miss
        DemoLookupService->>Database: Simulate async delay
        Database-->>DemoLookupService: Return items
        DemoLookupService->>Cache: TryAdd(key, items)
    end
    DemoLookupService-->>Client: Return items

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File-Level Changes

Change	Details	Files
Implement caching mechanism using ConcurrentDictionary	Add static ConcurrentDictionary to cache lookup items Implement cache lookup before creating new items Add TryAdd operation to store newly created items in cache	src/BootstrapBlazor.Server/Services/DemoLookupService.cs
Convert synchronous operation to asynchronous	Change GetItemsByKey to return null Add new async GetItemsByKeyAsync method Add Task.Delay to simulate async database operation	src/BootstrapBlazor.Server/Services/DemoLookupService.cs
Refactor service provider handling	Remove private Provider property Use constructor-injected provider directly in the method	src/BootstrapBlazor.Server/Services/DemoLookupService.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#4890	Add caching logic to the LookupService sample	✅

Possibly linked issues

• refactor(LookupService): add cache logic for LookupService sample #4890: The PR implements the cache logic for LookupService as requested in the issue.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider adding a cache invalidation strategy or documentation explaining when/how cached data should be refreshed in a production environment.
• The synchronous GetItemsByKey() method now always returns null - consider either removing it if unused or implementing it consistently with the async version.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (06ed5f0) to head (bb8699d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #4891   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          623       623           
  Lines        27834     27834           
  Branches      3990      3990           
=========================================
  Hits         27834     27834           

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