mirror of
https://github.com/tiennm99/miti99bot.git
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tiennm99
642fccb7b7
Rename: - Go module github.com/tiennm99/miti99bot-go → github.com/tiennm99/miti99bot - CloudFormation stack miti99bot-aws-port → miti99bot - Drop "port", "Cloud Run", "GCP", "cutover", "Phase NN" framing from active code and docs — project reads as canonical AWS-Lambda from now on. AWS deploy guide + flow fix: - New docs/deploy-aws-free-tier-guide.md — Ubuntu 24.04 ARM64 onboarding with project-local venv (pip awscli + sam-cli), SSM secrets via read -s, idempotent OIDC provider + role creation, $1 budget alarm. - Drop sam build from the pipeline — provided.al2023 + makefile builder expects a Makefile in CodeUri (build/lambda/, the output dir), so the step always fails. sam deploy --template-file template.yaml now reads the raw template and zips build/lambda/ directly. - Rollback section rewritten — use continue-update-rollback / cancel-update-stack / git-SHA redeploy. Drop the broken --use-previous-template recipe. - DynamoDB free-tier row corrected (on-demand is 2.5M read / 1M write request units, not 25 RCU/WCU). Updated: - README.md fully rewritten (drops port/legacy framing, lists modules, points new users at the free-tier guide). - aws/README.md retitled "AWS account setup", phase numbers stripped. - Makefile / .github/workflows/deploy.yml — sam deploy flow. - samconfig.toml — stack_name = "miti99bot". - Go comments — Cloud Run → Lambda, Cloud Scheduler → EventBridge Scheduler, Cloud Logging → CloudWatch Logs. - Struct field GCPProject → FirestoreProject (env GOOGLE_CLOUD_PROJECT unchanged). Plus advisory reports under plans/reports/ from the code-reviewer + researcher passes that informed the fixes. Verified: go vet ./..., go build ./..., go test ./... all green.
34 lines
1.4 KiB
Go
34 lines
1.4 KiB
Go
// Package keylock serialises compound operations that target the same key
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// (typically a chat / user / subject identifier) across goroutines.
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//
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// Why a separate package: every game module needs a per-subject mutex to
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// turn KVStore's single-op atomicity into safe Get→mutate→Put. The bot
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// dispatcher runs each Telegram update in its own goroutine, and the JS
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// source's Cloudflare Workers serialisation is not a property Go inherits.
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//
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// Trade-off: the underlying sync.Map grows unboundedly with distinct keys
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// (~32 B each). At 1M keys that's ~32 MB — acceptable for the lifetime of
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// a Lambda instance, which restarts well before reaching that scale.
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// Eviction is intentionally deferred — restart frequency keeps the working set bounded.
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package keylock
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import "sync"
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// Map gives each string key its own mutex, lazily created. Zero value is
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// usable; do not copy after first use (sync.Map is non-copyable).
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type Map struct {
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m sync.Map // key: string → val: *sync.Mutex
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}
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// Acquire locks the per-key mutex and returns its Unlock as a func so the
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// caller can `defer m.Acquire(key)()` at the top of a critical section.
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//
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// Distinct keys never block each other; same-key callers run serially in the
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// order Acquire was called.
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func (m *Map) Acquire(key string) func() {
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v, _ := m.m.LoadOrStore(key, &sync.Mutex{})
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mu := v.(*sync.Mutex)
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mu.Lock()
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return mu.Unlock
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}
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