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Code Issues Packages Projects Releases Wiki Activity
7eef261c3e
gitea/go.mod
Jason Song 1e4be0945b
Introduce globallock as distributed locks (#31908) 
To help #31813, but do not replace it, since this PR just introduces the
new module but misses some work:

- New option in settings. `#31813` has done it.
- Use the locks in business logic. `#31813` has done it.

So I think the most efficient way is to merge this PR first (if it's
acceptable) and then finish #31813.

## Design principles

### Use spinlock even in memory implementation

In actual use cases, users may cancel requests. `sync.Mutex` will block
the goroutine until the lock is acquired even if the request is
canceled. And the spinlock is more suitable for this scenario since it's
possible to give up the lock acquisition.

Although the spinlock consumes more CPU resources, I think it's
acceptable in most cases.

### Do not expose the mutex to callers

If we expose the mutex to callers, it's possible for callers to reuse
the mutex, which causes more complexity.

For example:
```go
lock := GetLocker(key)
lock.Lock()
// ...
// even if the lock is unlocked, we cannot GC the lock,
// since the caller may still use it again.
lock.Unlock()
lock.Lock()
// ...
lock.Unlock()

// callers have to GC the lock manually.
RemoveLocker(key)
```

That's why
https://github.com/go-gitea/gitea/pull/31813#discussion_r1721200549

In this PR, we only expose `ReleaseFunc` to callers. So callers just
need to call `ReleaseFunc` to release the lock, and do not need to care
about the lock's lifecycle.
```go
_, release, err := locker.Lock(ctx, key)
if err != nil {
    return err
}
// ...
release()

// if callers want to lock again, they have to re-acquire the lock.
_, release, err := locker.Lock(ctx, key)
// ...
```

In this way, it's also much easier for redis implementation to extend
the mutex automatically, so that callers do not need to care about the
lock's lifecycle. See also
https://github.com/go-gitea/gitea/pull/31813#discussion_r1722659743

### Use "release" instead of "unlock"

For "unlock", it has the meaning of "unlock an acquired lock". So it's
not acceptable to call "unlock" when failed to acquire the lock, or call
"unlock" multiple times. It causes more complexity for callers to decide
whether to call "unlock" or not.

So we use "release" instead of "unlock" to make it clear. Whether the
lock is acquired or not, callers can always call "release", and it's
also safe to call "release" multiple times.

But the code DO NOT expect callers to not call "release" after acquiring
the lock. If callers forget to call "release", it will cause resource
leak. That's why it's always safe to call "release" without extra
checks: to avoid callers to forget to call it.

### Acquired locks could be lost

Unlike `sync.Mutex` which will be locked forever once acquired until
calling `Unlock`, in the new module, the acquired lock could be lost.

For example, the caller has acquired the lock, and it holds the lock for
a long time since auto-extending is working for redis. However, it lost
the connection to the redis server, and it's impossible to extend the
lock anymore.

If the caller don't stop what it's doing, another instance which can
connect to the redis server could acquire the lock, and do the same
thing, which could cause data inconsistency.

So the caller should know what happened, the solution is to return a new
context which will be canceled if the lock is lost or released:

```go
ctx, release, err := locker.Lock(ctx, key)
if err != nil {
    return err
}
defer release()
// ...
DoSomething(ctx)

// the lock is lost now, then ctx has been canceled.

// Failed, since ctx has been canceled.
DoSomethingElse(ctx)
```

### Multiple ways to use the lock

1. Regular way

```go
ctx, release, err := Lock(ctx, key)
if err != nil {
    return err
}
defer release()
// ...
```

2. Early release

```go
ctx, release, err := Lock(ctx, key)
if err != nil {
    return err
}
defer release()
// ...
// release the lock earlier and reset the context back
ctx = release()
// continue to do something else
// ...
```

3. Functional way

```go
if err := LockAndDo(ctx, key, func(ctx context.Context) error {
    // ...
    return nil
}); err != nil {
    return err
}
```
2024-08-26 22:27:57 +08:00

327 lines
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Modula-2
Raw Blame History

module code.gitea.io/gitea
go 1.22
require (
code.gitea.io/actions-proto-go v0.4.0
code.gitea.io/gitea-vet v0.2.3
code.gitea.io/sdk/gitea v0.17.1
codeberg.org/gusted/mcaptcha v0.0.0-20220723083913-4f3072e1d570
connectrpc.com/connect v1.15.0
gitea.com/go-chi/binding v0.0.0-20240430071103-39a851e106ed
gitea.com/go-chi/cache v0.2.0
gitea.com/go-chi/captcha v0.0.0-20240315150714-fb487f629098
gitea.com/go-chi/session v0.0.0-20240316035857-16768d98ec96
gitea.com/lunny/dingtalk_webhook v0.0.0-20171025031554-e3534c89ef96
gitea.com/lunny/levelqueue v0.4.2-0.20230414023320-3c0159fe0fe4
github.com/42wim/sshsig v0.0.0-20211121163825-841cf5bbc121
github.com/Azure/azure-sdk-for-go/sdk/azcore v1.12.0
github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.3.2
github.com/Azure/go-ntlmssp v0.0.0-20221128193559-754e69321358
github.com/ProtonMail/go-crypto v1.0.0
github.com/PuerkitoBio/goquery v1.9.2
github.com/SaveTheRbtz/zstd-seekable-format-go/pkg v0.7.2
github.com/alecthomas/chroma/v2 v2.14.0
github.com/blakesmith/ar v0.0.0-20190502131153-809d4375e1fb
github.com/blevesearch/bleve/v2 v2.4.2
github.com/buildkite/terminal-to-html/v3 v3.12.1
github.com/caddyserver/certmagic v0.21.3
github.com/chi-middleware/proxy v1.1.1
github.com/dimiro1/reply v0.0.0-20200315094148-d0136a4c9e21
github.com/djherbis/buffer v1.2.0
github.com/djherbis/nio/v3 v3.0.1
github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5
github.com/dustin/go-humanize v1.0.1
github.com/editorconfig/editorconfig-core-go/v2 v2.6.2
github.com/emersion/go-imap v1.2.1
github.com/emirpasic/gods v1.18.1
github.com/ethantkoenig/rupture v1.0.1
github.com/felixge/fgprof v0.9.4
github.com/fsnotify/fsnotify v1.7.0
github.com/gliderlabs/ssh v0.3.7
github.com/go-ap/activitypub v0.0.0-20240408091739-ba76b44c2594
github.com/go-ap/jsonld v0.0.0-20221030091449-f2a191312c73
github.com/go-chi/chi/v5 v5.0.13
github.com/go-chi/cors v1.2.1
github.com/go-co-op/gocron v1.37.0
github.com/go-enry/go-enry/v2 v2.8.8
github.com/go-fed/httpsig v1.1.1-0.20201223112313-55836744818e
github.com/go-git/go-billy/v5 v5.5.0
github.com/go-git/go-git/v5 v5.12.0
github.com/go-ldap/ldap/v3 v3.4.6
github.com/go-redsync/redsync/v4 v4.13.0
github.com/go-sql-driver/mysql v1.8.1
github.com/go-swagger/go-swagger v0.31.0
github.com/go-testfixtures/testfixtures/v3 v3.11.0
github.com/go-webauthn/webauthn v0.10.2
github.com/gobwas/glob v0.2.3
github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f
github.com/gogs/go-gogs-client v0.0.0-20210131175652-1d7215cd8d85
github.com/golang-jwt/jwt/v5 v5.2.1
github.com/google/go-github/v61 v61.0.0
github.com/google/pprof v0.0.0-20240618054019-d3b898a103f8
github.com/google/uuid v1.6.0
github.com/gorilla/feeds v1.2.0
github.com/gorilla/sessions v1.3.0
github.com/h2non/gock v1.2.0
github.com/hashicorp/go-version v1.7.0
github.com/hashicorp/golang-lru/v2 v2.0.7
github.com/huandu/xstrings v1.5.0
github.com/jaytaylor/html2text v0.0.0-20230321000545-74c2419ad056
github.com/jhillyerd/enmime v1.2.0
github.com/json-iterator/go v1.1.12
github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4
github.com/klauspost/compress v1.17.9
github.com/klauspost/cpuid/v2 v2.2.8
github.com/lib/pq v1.10.9
github.com/markbates/goth v1.80.0
github.com/mattn/go-isatty v0.0.20
github.com/mattn/go-sqlite3 v1.14.22
github.com/meilisearch/meilisearch-go v0.26.3
github.com/mholt/archiver/v3 v3.5.1
github.com/microcosm-cc/bluemonday v1.0.26
github.com/microsoft/go-mssqldb v1.7.2
github.com/minio/minio-go/v7 v7.0.71
github.com/msteinert/pam v1.2.0
github.com/nektos/act v0.2.63
github.com/niklasfasching/go-org v1.7.0
github.com/olivere/elastic/v7 v7.0.32
github.com/opencontainers/go-digest v1.0.0
github.com/opencontainers/image-spec v1.1.0
github.com/pkg/errors v0.9.1
github.com/pquerna/otp v1.4.0
github.com/prometheus/client_golang v1.19.1
github.com/quasoft/websspi v1.1.2
github.com/redis/go-redis/v9 v9.6.0
github.com/robfig/cron/v3 v3.0.1
github.com/santhosh-tekuri/jsonschema/v5 v5.3.1
github.com/sassoftware/go-rpmutils v0.4.0
github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3
github.com/shurcooL/vfsgen v0.0.0-20230704071429-0000e147ea92
github.com/stretchr/testify v1.9.0
github.com/syndtr/goleveldb v1.0.0
github.com/tstranex/u2f v1.0.0
github.com/ulikunitz/xz v0.5.12
github.com/urfave/cli/v2 v2.27.2
github.com/xanzy/go-gitlab v0.105.0
github.com/xeipuuv/gojsonschema v1.2.0
github.com/yohcop/openid-go v1.0.1
github.com/yuin/goldmark v1.7.2
github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
github.com/yuin/goldmark-meta v1.1.0
golang.org/x/crypto v0.24.0
golang.org/x/image v0.18.0
golang.org/x/net v0.26.0
golang.org/x/oauth2 v0.21.0
golang.org/x/sys v0.21.0
golang.org/x/text v0.16.0
golang.org/x/tools v0.22.0
google.golang.org/grpc v1.62.1
google.golang.org/protobuf v1.34.2
gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
gopkg.in/ini.v1 v1.67.0
gopkg.in/yaml.v3 v3.0.1
mvdan.cc/xurls/v2 v2.5.0
strk.kbt.io/projects/go/libravatar v0.0.0-20191008002943-06d1c002b251
xorm.io/builder v0.3.13
xorm.io/xorm v1.3.9
)
require (
cloud.google.com/go/compute/metadata v0.3.0 // indirect
dario.cat/mergo v1.0.0 // indirect
filippo.io/edwards25519 v1.1.0 // indirect
git.sr.ht/~mariusor/go-xsd-duration v0.0.0-20220703122237-02e73435a078 // indirect
github.com/Azure/azure-sdk-for-go/sdk/internal v1.9.0 // indirect
github.com/ClickHouse/ch-go v0.61.5 // indirect
github.com/ClickHouse/clickhouse-go/v2 v2.25.0 // indirect
github.com/DataDog/zstd v1.5.5 // indirect
github.com/Masterminds/goutils v1.1.1 // indirect
github.com/Masterminds/semver/v3 v3.2.1 // indirect
github.com/Masterminds/sprig/v3 v3.2.3 // indirect
github.com/Microsoft/go-winio v0.6.2 // indirect
github.com/RoaringBitmap/roaring v1.9.4 // indirect
github.com/andybalholm/brotli v1.1.0 // indirect
github.com/andybalholm/cascadia v1.3.2 // indirect
github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
github.com/aymerick/douceur v0.2.0 // indirect
github.com/beorn7/perks v1.0.1 // indirect
github.com/bits-and-blooms/bitset v1.13.0 // indirect
github.com/blevesearch/bleve_index_api v1.1.10 // indirect
github.com/blevesearch/geo v0.1.20 // indirect
github.com/blevesearch/go-faiss v1.0.20 // indirect
github.com/blevesearch/go-porterstemmer v1.0.3 // indirect
github.com/blevesearch/gtreap v0.1.1 // indirect
github.com/blevesearch/mmap-go v1.0.4 // indirect
github.com/blevesearch/scorch_segment_api/v2 v2.2.15 // indirect
github.com/blevesearch/segment v0.9.1 // indirect
github.com/blevesearch/snowballstem v0.9.0 // indirect
github.com/blevesearch/upsidedown_store_api v1.0.2 // indirect
github.com/blevesearch/vellum v1.0.10 // indirect
github.com/blevesearch/zapx/v11 v11.3.10 // indirect
github.com/blevesearch/zapx/v12 v12.3.10 // indirect
github.com/blevesearch/zapx/v13 v13.3.10 // indirect
github.com/blevesearch/zapx/v14 v14.3.10 // indirect
github.com/blevesearch/zapx/v15 v15.3.13 // indirect
github.com/blevesearch/zapx/v16 v16.1.5 // indirect
github.com/boombuler/barcode v1.0.1 // indirect
github.com/bradfitz/gomemcache v0.0.0-20230905024940-24af94b03874 // indirect
github.com/caddyserver/zerossl v0.1.3 // indirect
github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a // indirect
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/cloudflare/circl v1.3.9 // indirect
github.com/couchbase/go-couchbase v0.1.1 // indirect
github.com/couchbase/gomemcached v0.3.1 // indirect
github.com/couchbase/goutils v0.1.2 // indirect
github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
github.com/cyphar/filepath-securejoin v0.2.5 // indirect
github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
github.com/davidmz/go-pageant v1.0.2 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
github.com/dlclark/regexp2 v1.11.0 // indirect
github.com/emersion/go-sasl v0.0.0-20231106173351-e73c9f7bad43 // indirect
github.com/fatih/color v1.17.0 // indirect
github.com/felixge/httpsnoop v1.0.4 // indirect
github.com/fxamacker/cbor/v2 v2.6.0 // indirect
github.com/go-ap/errors v0.0.0-20240304112515-6077fa9c17b0 // indirect
github.com/go-asn1-ber/asn1-ber v1.5.7 // indirect
github.com/go-enry/go-oniguruma v1.2.1 // indirect
github.com/go-faster/city v1.0.1 // indirect
github.com/go-faster/errors v0.7.1 // indirect
github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
github.com/go-openapi/analysis v0.23.0 // indirect
github.com/go-openapi/errors v0.22.0 // indirect
github.com/go-openapi/inflect v0.21.0 // indirect
github.com/go-openapi/jsonpointer v0.21.0 // indirect
github.com/go-openapi/jsonreference v0.21.0 // indirect
github.com/go-openapi/loads v0.22.0 // indirect
github.com/go-openapi/runtime v0.28.0 // indirect
github.com/go-openapi/spec v0.21.0 // indirect
github.com/go-openapi/strfmt v0.23.0 // indirect
github.com/go-openapi/swag v0.23.0 // indirect
github.com/go-openapi/validate v0.24.0 // indirect
github.com/go-webauthn/x v0.1.9 // indirect
github.com/goccy/go-json v0.10.3 // indirect
github.com/golang-jwt/jwt/v4 v4.5.0 // indirect
github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
github.com/golang-sql/sqlexp v0.1.0 // indirect
github.com/golang/geo v0.0.0-20230421003525-6adc56603217 // indirect
github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
github.com/golang/protobuf v1.5.4 // indirect
github.com/golang/snappy v0.0.4 // indirect
github.com/google/btree v1.1.2 // indirect
github.com/google/go-querystring v1.1.0 // indirect
github.com/google/go-tpm v0.9.0 // indirect
github.com/gorilla/css v1.0.1 // indirect
github.com/gorilla/handlers v1.5.2 // indirect
github.com/gorilla/mux v1.8.1 // indirect
github.com/gorilla/securecookie v1.1.2 // indirect
github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 // indirect
github.com/hashicorp/errwrap v1.1.0 // indirect
github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
github.com/hashicorp/go-multierror v1.1.1 // indirect
github.com/hashicorp/go-retryablehttp v0.7.7 // indirect
github.com/hashicorp/hcl v1.0.0 // indirect
github.com/imdario/mergo v0.3.16 // indirect
github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
github.com/jessevdk/go-flags v1.5.0 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/kevinburke/ssh_config v1.2.0 // indirect
github.com/klauspost/pgzip v1.2.6 // indirect
github.com/kr/pretty v0.3.1 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/libdns/libdns v0.2.2 // indirect
github.com/magiconair/properties v1.8.7 // indirect
github.com/mailru/easyjson v0.7.7 // indirect
github.com/markbates/going v1.0.3 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-runewidth v0.0.15 // indirect
github.com/mholt/acmez/v2 v2.0.1 // indirect
github.com/miekg/dns v1.1.61 // indirect
github.com/minio/md5-simd v1.1.2 // indirect
github.com/mitchellh/copystructure v1.2.0 // indirect
github.com/mitchellh/mapstructure v1.5.0 // indirect
github.com/mitchellh/reflectwalk v1.0.2 // indirect
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
github.com/modern-go/reflect2 v1.0.2 // indirect
github.com/mrjones/oauth v0.0.0-20190623134757-126b35219450 // indirect
github.com/mschoch/smat v0.2.0 // indirect
github.com/nwaples/rardecode v1.1.3 // indirect
github.com/oklog/ulid v1.3.1 // indirect
github.com/olekukonko/tablewriter v0.0.5 // indirect
github.com/onsi/ginkgo v1.16.5 // indirect
github.com/paulmach/orb v0.11.1 // indirect
github.com/pelletier/go-toml/v2 v2.1.1 // indirect
github.com/pierrec/lz4/v4 v4.1.21 // indirect
github.com/pjbgf/sha1cd v0.3.0 // indirect
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
github.com/prometheus/client_model v0.6.0 // indirect
github.com/prometheus/common v0.50.0 // indirect
github.com/prometheus/procfs v0.13.0 // indirect
github.com/rhysd/actionlint v1.7.1 // indirect
github.com/rivo/uniseg v0.4.7 // indirect
github.com/rogpeppe/go-internal v1.12.0 // indirect
github.com/rs/xid v1.5.0 // indirect
github.com/russross/blackfriday/v2 v2.1.0 // indirect
github.com/sagikazarmark/locafero v0.4.0 // indirect
github.com/sagikazarmark/slog-shim v0.1.0 // indirect
github.com/segmentio/asm v1.2.0 // indirect
github.com/shopspring/decimal v1.4.0 // indirect
github.com/shurcooL/httpfs v0.0.0-20230704072500-f1e31cf0ba5c // indirect
github.com/sirupsen/logrus v1.9.3 // indirect
github.com/skeema/knownhosts v1.2.2 // indirect
github.com/sourcegraph/conc v0.3.0 // indirect
github.com/spf13/afero v1.11.0 // indirect
github.com/spf13/cast v1.6.0 // indirect
github.com/spf13/pflag v1.0.5 // indirect
github.com/spf13/viper v1.18.2 // indirect
github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
github.com/subosito/gotenv v1.6.0 // indirect
github.com/toqueteos/webbrowser v1.2.0 // indirect
github.com/unknwon/com v1.0.1 // indirect
github.com/valyala/bytebufferpool v1.0.0 // indirect
github.com/valyala/fasthttp v1.55.0 // indirect
github.com/valyala/fastjson v1.6.4 // indirect
github.com/x448/float16 v0.8.4 // indirect
github.com/xanzy/ssh-agent v0.3.3 // indirect
github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
github.com/zeebo/blake3 v0.2.3 // indirect
go.etcd.io/bbolt v1.3.10 // indirect
go.mongodb.org/mongo-driver v1.14.0 // indirect
go.opentelemetry.io/otel v1.27.0 // indirect
go.opentelemetry.io/otel/trace v1.27.0 // indirect
go.uber.org/atomic v1.11.0 // indirect
go.uber.org/multierr v1.11.0 // indirect
go.uber.org/zap v1.27.0 // indirect
golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f // indirect
golang.org/x/mod v0.18.0 // indirect
golang.org/x/sync v0.7.0 // indirect
golang.org/x/time v0.5.0 // indirect
google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c // indirect
gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
gopkg.in/warnings.v0 v0.1.2 // indirect
gopkg.in/yaml.v2 v2.4.0 // indirect
)
replace github.com/hashicorp/go-version => github.com/6543/go-version v1.3.1
replace github.com/shurcooL/vfsgen => github.com/lunny/vfsgen v0.0.0-20220105142115-2c99e1ffdfa0
replace github.com/nektos/act => gitea.com/gitea/act v0.259.1
// TODO: This could be removed after https://github.com/mholt/archiver/pull/396 merged
replace github.com/mholt/archiver/v3 => github.com/anchore/archiver/v3 v3.5.2
exclude github.com/gofrs/uuid v3.2.0+incompatible
exclude github.com/gofrs/uuid v4.0.0+incompatible
exclude github.com/goccy/go-json v0.4.11
exclude github.com/satori/go.uuid v1.2.0
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