docs(README.md): Add Middleware section with details on new middlewares. #51
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Actionable comments posted: 4
🧹 Outside diff range and nitpick comments (1)
middleware/distributednooverlapping/README.md (1)
35-37: Document mutex TTL considerationsThe comment about TTL should be expanded to explain the implications.
Add a note explaining:
// The mutex TTL should be set carefully: // 1. Too short: Job might be executed multiple times if it runs longer than TTL // 2. Too long: If the process crashes, the lock might prevent other instances from running the job // // Recommended: Set TTL to (expected_job_duration * 2) + buffer_time🧰 Tools
🪛 Markdownlint (0.35.0)
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📒 Files selected for processing (9)
.gitignore(1 hunks)README.md(1 hunks)_example/entry/context/main.go(0 hunks)_example/entry/middleware/main.go(0 hunks)_example/middleware/delayoverlapping/main.go(0 hunks)_example/middleware/nooverlapping/main.go(0 hunks)_example/middleware/recovery/main.go(0 hunks)_example/readme/main.go(0 hunks)middleware/distributednooverlapping/README.md(1 hunks)
💤 Files with no reviewable changes (6)
- _example/readme/main.go
- _example/middleware/delayoverlapping/main.go
- _example/entry/middleware/main.go
- _example/entry/context/main.go
- _example/middleware/nooverlapping/main.go
- _example/middleware/recovery/main.go
✅ Files skipped from review due to trivial changes (1)
- .gitignore
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middleware/distributednooverlapping/README.md
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| _, _ = c.AddJob("* * * * * *", &basicJob{"one"}) | ||
| _, _ = c.AddJob("* * * * * *", &basicJob{"two"}) |
There was a problem hiding this comment.
Add error handling for job registration
The example ignores potential errors when adding jobs.
-_, _ = c.AddJob("* * * * * *", &basicJob{"one"})
-_, _ = c.AddJob("* * * * * *", &basicJob{"two"})
+if _, err := c.AddJob("* * * * * *", &basicJob{"one"}); err != nil {
+ log.Fatal("Failed to add job one:", err)
+}
+if _, err := c.AddJob("* * * * * *", &basicJob{"two"}); err != nil {
+ log.Fatal("Failed to add job two:", err)
+}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| _, _ = c.AddJob("* * * * * *", &basicJob{"one"}) | |
| _, _ = c.AddJob("* * * * * *", &basicJob{"two"}) | |
| if _, err := c.AddJob("* * * * * *", &basicJob{"one"}); err != nil { | |
| log.Fatal("Failed to add job one:", err) | |
| } | |
| if _, err := c.AddJob("* * * * * *", &basicJob{"two"}); err != nil { | |
| log.Fatal("Failed to add job two:", err) | |
| } |
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| rdb := redis.NewClient(&redis.Options{ | ||
| Addr: "localhost:6379", | ||
| }) |
There was a problem hiding this comment.
Add error handling for Redis connection
The example should demonstrate proper error handling for production use.
rdb := redis.NewClient(&redis.Options{
Addr: "localhost:6379",
})
+
+if err := rdb.Ping(context.Background()).Err(); err != nil {
+ log.Fatal("Failed to connect to Redis:", err)
+}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| rdb := redis.NewClient(&redis.Options{ | |
| Addr: "localhost:6379", | |
| }) | |
| rdb := redis.NewClient(&redis.Options{ | |
| Addr: "localhost:6379", | |
| }) | |
| if err := rdb.Ping(context.Background()).Err(); err != nil { | |
| log.Fatal("Failed to connect to Redis:", err) | |
| } |
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…Overlapping Middleware
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (8)
middleware/otel/README.md (5)
1-3: Fix grammatical error in the introductionThere's a grammatical error in the middleware description.
-The `otel` is a middleware for that provides observability with OpenTelemetry. +The `otel` middleware provides observability with OpenTelemetry.
33-36: Add meaningful implementation in Run methodThe current Run method contains a placeholder comment without actual implementation. Consider adding a realistic example that demonstrates how tracing works with a real task.
func (b *basicJob) Run(ctx context.Context) error { - // do something + // Simulate some work that can be traced + time.Sleep(100 * time.Millisecond) + fmt.Println("Job executed:", time.Now()) return nil }🧰 Tools
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39-41: Add explanatory comments for OpenTelemetry setupThe OpenTelemetry configuration could benefit from more detailed comments explaining the purpose of each component.
- // configure otel, the following is just a demonstration provider. + // Configure OpenTelemetry with an in-memory exporter for demonstration + // In production, you would typically use an exporter that sends data + // to your observability backend (e.g., Jaeger, Zipkin) imsb := tracetest.NewInMemoryExporter() tp := trace.NewTracerProvider(trace.WithSyncer(imsb))🧰 Tools
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54-55: Add explanation for the sleep durationThe purpose of the sleep duration should be explained to help readers understand the example better.
+ // Wait for 10 seconds to collect some spans for demonstration time.Sleep(10 * time.Second) fmt.Println("spans:", len(imsb.GetSpans()))🧰 Tools
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59-63: Add context to the output sectionThe output section would be more helpful with an explanation of what the spans represent and how they relate to the job execution.
output: ```shell +# Shows the number of spans collected over 10 seconds +# (1 span per second due to the "* * * * * *" schedule) spans: 10</blockquote></details> <details> <summary>middleware/distributednooverlapping/README.md (3)</summary><blockquote> `16-20`: **Document version requirements** Please add version requirements for the dependencies: - Minimum required version of `go-cron` - Compatible Redis versions - Go version requirements <details> <summary>🧰 Tools</summary> <details> <summary>🪛 Markdownlint (0.35.0)</summary> 16-16: Column: 1 Hard tabs (MD010, no-hard-tabs) --- 17-17: Column: 1 Hard tabs (MD010, no-hard-tabs) --- 18-18: Column: 1 Hard tabs (MD010, no-hard-tabs) --- 19-19: Column: 1 Hard tabs (MD010, no-hard-tabs) </details> </details> --- `35-37`: **Review mutex TTL duration** The current TTL of 60 hours seems excessive for a job that runs every second and takes 1 second to complete. Consider reducing the TTL to a more reasonable duration: ```diff -func (j *basicJob) GetMutexTTL() time.Duration { - return time.Hour * 60 // the ttl suggests greater than the running time of the job -} +func (j *basicJob) GetMutexTTL() time.Duration { + return time.Second * 5 // 5x the expected running time for safety +}🧰 Tools
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68-76: Add explanation for the example outputThe output section would be more helpful with explanations of:
- Why certain jobs run at specific times
- How the distributed locking prevents overlap
- What the timing patterns indicate
Add explanatory text before the output:
The output below demonstrates: - Jobs running sequentially without overlap - Distributed locking ensuring only one instance runs at a time - Alternating execution between job instances
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📒 Files selected for processing (2)
middleware/distributednooverlapping/README.md(1 hunks)middleware/otel/README.md(1 hunks)
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🔇 Additional comments (3)
middleware/distributednooverlapping/README.md (3)
1-4: Enhance the introduction section with more details
The introduction should be expanded to include key features, requirements, and implementation details as previously suggested.
46-48: Add error handling for Redis connection
The Redis connection setup should include proper error handling.
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58-59: Add error handling for job registration
The example ignores potential errors when adding jobs.
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| otel.WithTracerProvider(tp), // custom otel.TracerProvider | ||
| )) | ||
|
|
||
| _, _ = c.AddJob("* * * * * *", &basicJob{}) |
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🛠️ Refactor suggestion
Handle errors from AddJob
The error returned from AddJob should be properly handled instead of being silently ignored.
- _, _ = c.AddJob("* * * * * *", &basicJob{})
+ if _, err := c.AddJob("* * * * * *", &basicJob{}); err != nil {
+ log.Fatal("Failed to add job:", err)
+ }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| _, _ = c.AddJob("* * * * * *", &basicJob{}) | |
| if _, err := c.AddJob("* * * * * *", &basicJob{}); err != nil { | |
| log.Fatal("Failed to add job:", err) | |
| } |
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| func (j *basicJob) GetMutexKey() string { | ||
| return "basic:job" | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Make mutex key unique per job instance
The current implementation uses a static mutex key "basic:job" for all jobs. This could cause unnecessary blocking between different job instances.
Consider using the job's slug in the mutex key:
-func (j *basicJob) GetMutexKey() string {
- return "basic:job"
-}
+func (j *basicJob) GetMutexKey() string {
+ return fmt.Sprintf("basic:job:%s", j.slug)
+}Committable suggestion skipped: line range outside the PR's diff.
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Summary by CodeRabbit
New Features
otelmiddleware to enhance observability.Chores
.gitignorefile to include_exampleand modify.todo.These updates enhance user understanding of middleware options and ensure cleaner version control management.