feature(locking): add proper locking and overhaul existing locking service

README.md

@@ -37,6 +37,34 @@ LOGGING_LEVEL=debug
 
 Please look into the `_doc/` folder for [OpenAPI specification](./_doc/api.yaml) and a Postman Collection.
 
+### Lock service
+
+The `lockService` can be used to lock resources. This works in-memory and also in a distributed fashion with REDIS.
+
+Ensure to provide proper locking options when using, although in-memory ignores those. 
+
+Example:
+
+```shell
+# invoked from an endpoint
+context := c.Request.Context()
+
+var err error
+var lock appLock
+
+if lock, err = h.lockService.lockWithOptions(context, "TEST-LOCK", withAppLockOptionExpiry(5*time.Minute), withAppLockOptionInfiniteRetries(), withAppLockOptionRetryDelay(5*time.Second)); err != nil {
+    _ = c.AbortWithError(errToHttpStatus(err), err)
+    return
+}
+# defer to avoid leakage
+defer func(lock appLock) {
+    _ = lock.unlock(context)
+}(lock)
+
+# simulate long running task
+time.Sleep(20 * time.Second)
+```
+
 ### Getting started
 
 1. Run `make clean dependencies` to fetch dependencies

go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/go-co-op/gocron-redis-lock/v2 v2.0.1
 	github.com/go-co-op/gocron/v2 v2.5.0
 	github.com/go-playground/validator/v10 v10.20.0
+	github.com/go-redsync/redsync/v4 v4.11.0
 	github.com/go-resty/resty/v2 v2.13.1
 	github.com/google/uuid v1.6.0
 	github.com/redis/go-redis/v9 v9.5.1
@@ -39,7 +40,7 @@ require (
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-redsync/redsync/v4 v4.11.0 // indirect
+	github.com/go-redis/redis v6.15.9+incompatible // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
@@ -58,6 +59,7 @@ require (
 	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/onsi/ginkgo v1.16.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/prometheus/client_golang v1.18.0 // indirect

go.sum

@@ -56,6 +56,10 @@ github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4
 github.com/docker/go-units v0.5.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/fatih/color v1.15.0 h1:kOqh6YHBtK8aywxGerMG2Eq3H6Qgoqeo13Bk2Mv/nBs=
 github.com/fatih/color v1.15.0/go.mod h1:0h5ZqXfHYED7Bhv2ZJamyIOUej9KtShiJESRwBDUSsw=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
+github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
 github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
 github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
 github.com/gin-contrib/cors v1.7.2 h1:oLDHxdg8W/XDoN/8zamqk/Drgt4oVZDvaV0YmvVICQw=
@@ -92,16 +96,27 @@ github.com/go-redsync/redsync/v4 v4.11.0 h1:OPEcAxHBb95EzfwCKWM93ksOwHd5bTce2BD4
 github.com/go-redsync/redsync/v4 v4.11.0/go.mod h1:ZfayzutkgeBmEmBlUR3j+rF6kN44UUGtEdfzhBFZTPc=
 github.com/go-resty/resty/v2 v2.13.1 h1:x+LHXBI2nMB1vqndymf26quycC4aggYJ7DECYbiz03g=
 github.com/go-resty/resty/v2 v2.13.1/go.mod h1:GznXlLxkq6Nh4sU59rPmUw3VtgpO3aS96ORAI6Q7d+0=
+github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI=
 github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572/go.mod h1:9Pwr4B2jHnOSGXyyzV8ROjYa2ojvAY6HCGYYfMoC3Ls=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
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 github.com/gomodule/redigo v1.8.9/go.mod h1:7ArFNvsTjH8GMMzB4uy1snslv2BwmginuMs06a1uzZE=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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@@ -114,6 +129,7 @@ github.com/hashicorp/errwrap v1.1.0 h1:OxrOeh75EUXMY8TBjag2fzXGZ40LB6IKw45YeGUDY
 github.com/hashicorp/errwrap v1.1.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+lD48awMYo=
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+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a h1:bbPeKD0xmW/Y25WS6cokEszi5g+S0QxI/d45PkRi7Nk=
@@ -172,8 +188,17 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
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+github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
+github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
+github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
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@@ -220,6 +245,7 @@ github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSS
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
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@@ -245,6 +271,7 @@ github.com/urfave/cli/v2 v2.27.2 h1:6e0H+AkS+zDckwPCUrZkKX38mRaau4nL2uipkJpbkcI=
 github.com/urfave/cli/v2 v2.27.2/go.mod h1:g0+79LmHHATl7DAcHO99smiR/T7uGLw84w8Y42x+4eM=
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@@ -265,6 +292,7 @@ golang.org/x/arch v0.8.0 h1:3wRIsP3pM4yUptoR96otTUOXI367OS0+c9eeRi9doIc=
 golang.org/x/arch v0.8.0/go.mod h1:FEVrYAQjsQXMVJ1nsMoVVXPZg6p2JE2mx8psSWTDQys=
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 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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 golang.org/x/crypto v0.23.0 h1:dIJU/v2J8Mdglj/8rJ6UUOM3Zc9zLZxVZwwxMooUSAI=
@@ -272,14 +300,18 @@ golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v
 golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f h1:99ci1mjWVBWwJiEKYY6jWa4d2nTQVIEhZIptnrVb1XY=
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@@ -288,15 +320,24 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
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 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -329,6 +370,7 @@ golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
@@ -336,18 +378,31 @@ golang.org/x/tools v0.20.0 h1:hz/CVckiOxybQvFw6h7b/q80NTr9IUQb4s1IIzW7KNY=
 golang.org/x/tools v0.20.0/go.mod h1:WvitBU7JJf6A4jOdg4S1tviW9bhUxkgeCui/0JHctQg=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19 h1:0nDDozoAU19Qb2HwhXadU8OcsiO/09cnTqhUtq2MEOM=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20230525234030-28d5490b6b19/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
 google.golang.org/grpc v1.57.1 h1:upNTNqv0ES+2ZOOqACwVtS3Il8M12/+Hz41RCPzAjQg=
 google.golang.org/grpc v1.57.1/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
 google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

server/app.go

@@ -49,7 +49,18 @@ func Start() {
 	actionRepo := newActionDbRepo(env.db)
 	actionInvocationRepo := newActionInvocationDbRepo(env.db)
 
-	lockService := newLockMemService()
+	var lockService lockService
+
+	if env.lockConfig.redisEnabled {
+		var err error
+		lockService, err = newLockRedisService(env.lockConfig)
+
+		if err != nil {
+			zap.L().Fatal("Failed to create lock service", zap.Error(err))
+		}
+	} else {
+		lockService = newLockMemService()
+	}
 
 	eventService := newEventService(eventRepo)
 	updateService := newUpdateService(updateRepo, eventService)

server/service_lock.go

@@ -1,9 +1,65 @@
 package server
 
+import (
+	"context"
+	"math"
+	"time"
+)
+
+// lockService provides methods for locking resources, behavior depends on underlying implementation
 type lockService interface {
-	init() error
+	// lock locks a resource applying default TTL values (no options for in-memory locking, otherwise applies default implementation of other lockers)
-	tryLock(resource string) error
+	lock(ctx context.Context, resource string) (appLock, error)
-	release(resource string) error
+
-	exists(resource string) bool
+	// lockWithOptions locks a resource with given options, has no effect for in-memory locking
-	stop()
+	lockWithOptions(ctx context.Context, resource string, options ...appLockOption) (appLock, error)
+}
+
+type appLock interface {
+	// unlock unlocks a lock
+	unlock(ctx context.Context) error
+}
+
+type appLockOption interface {
+	Apply(l *appLockOptions)
+}
+
+type appLockOptionFunc func(o *appLockOptions)
+
+func (f appLockOptionFunc) Apply(o *appLockOptions) {
+	f(o)
+}
+
+type appLockOptions struct {
+	ttl        *time.Duration
+	retryDelay *time.Duration
+	maxRetries *int
+}
+
+func withAppLockOptionExpiry(expiry time.Duration) appLockOption {
+	return appLockOptionFunc(func(o *appLockOptions) {
+		o.ttl = &expiry
+	})
+}
+
+func withAppLockOptionRetries(retries int) appLockOption {
+	return appLockOptionFunc(func(o *appLockOptions) {
+		o.maxRetries = &retries
+	})
+}
+
+var (
+	appLockOptionMaxRetries = math.MaxInt32
+)
+
+func withAppLockOptionInfiniteRetries() appLockOption {
+	return appLockOptionFunc(func(o *appLockOptions) {
+		o.maxRetries = &appLockOptionMaxRetries
+	})
+}
+
+func withAppLockOptionRetryDelay(retryDelay time.Duration) appLockOption {
+	return appLockOptionFunc(func(o *appLockOptions) {
+		o.retryDelay = &retryDelay
+	})
 }

server/service_lock_mem.go

@@ -1,6 +1,8 @@
 package server
 
 import (
+	"context"
+	"errors"
 	"git.myservermanager.com/varakh/upda/util"
 	"go.uber.org/zap"
 )
@@ -9,44 +11,51 @@ type lockMemService struct {
 	registry *util.InMemoryLockRegistry
 }
 
+var (
+	errLockMemNotReleased = newServiceError(Conflict, errors.New("lock service: could not release lock"))
+)
+
 func newLockMemService() lockService {
+	zap.L().Info("Initialized in-memory locking service")
 	return &lockMemService{registry: util.NewInMemoryLockRegistry()}
 }
 
-func (s *lockMemService) init() error {
+func (s *lockMemService) lock(ctx context.Context, resource string) (appLock, error) {
-	zap.L().Info("Initialized in-memory locking service")
-	return nil
-}
-
-func (s *lockMemService) tryLock(resource string) error {
 	if resource == "" {
-		return errorValidationNotBlank
+		return nil, errorValidationNotBlank
 	}
 
 	zap.L().Sugar().Debugf("Trying to lock '%s'", resource)
+
 	s.registry.Lock(resource)
+
 	zap.L().Sugar().Debugf("Locked '%s'", resource)
 
-	return nil
+	l := &inMemoryLock{
-}
+		registry: s.registry,
-
+		resource: resource,
-func (s *lockMemService) release(resource string) error {
-	if resource == "" {
-		return errorValidationNotBlank
 	}
 
-	zap.L().Sugar().Debugf("Releasing lock '%s'", resource)
+	return l, nil
-	err := s.registry.Unlock(resource)
-	zap.L().Sugar().Debugf("Released lock '%s'", resource)
-
-	return err
 }
 
-func (s *lockMemService) exists(resource string) bool {
+func (s *lockMemService) lockWithOptions(ctx context.Context, resource string, options ...appLockOption) (appLock, error) {
-	return s.registry.Exists(resource)
+	// ignores any options
+	return s.lock(ctx, resource)
 }
 
-func (s *lockMemService) stop() {
+var _ appLock = (*inMemoryLock)(nil)
-	zap.L().Info("Clearing in-memory locking service")
+
-	s.registry.Clear()
+type inMemoryLock struct {
+	registry *util.InMemoryLockRegistry
+	resource string
+}
+
+func (r inMemoryLock) unlock(ctx context.Context) error {
+	zap.L().Sugar().Debugf("Unlocking '%s'", r.resource)
+
+	if err := r.registry.Unlock(r.resource); err != nil {
+		return errLockMemNotReleased
+	}
+	return nil
 }

server/service_lock_redis.go

@@ -0,0 +1,107 @@
+package server
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"github.com/go-redsync/redsync/v4"
+	redsyncgoredis "github.com/go-redsync/redsync/v4/redis/goredis/v9"
+	"github.com/redis/go-redis/v9"
+	"go.uber.org/zap"
+)
+
+type lockRedisService struct {
+	rs *redsync.Redsync
+}
+
+var (
+	errLockRedisNotObtained = newServiceError(Conflict, errors.New("lock service: could not obtain lock"))
+	errLockRedisNotReleased = newServiceError(Conflict, errors.New("lock service: could not release lock"))
+)
+
+func newLockRedisService(lc *lockConfig) (lockService, error) {
+	zap.L().Info("Initialized REDIS locking service")
+
+	var err error
+	var redisOptions *redis.Options
+	redisOptions, err = redis.ParseURL(lc.redisUrl)
+
+	if err != nil {
+		zap.L().Sugar().Fatalf("Cannot parse REDIS URL '%s' to set up locking. Reason: %s", lc.redisUrl, err.Error())
+	}
+
+	c := redis.NewClient(redisOptions)
+	if err = c.Ping(context.Background()).Err(); err != nil {
+		return nil, newServiceError(General, fmt.Errorf("lock service: failed to connect to REDIS. Reason: %w", err))
+	}
+
+	pool := redsyncgoredis.NewPool(c)
+	rs := redsync.New(pool)
+
+	return &lockRedisService{rs: rs}, nil
+}
+
+func (s *lockRedisService) lock(ctx context.Context, resource string) (appLock, error) {
+	return s.lockWithOptions(ctx, resource, nil)
+}
+
+func (s *lockRedisService) lockWithOptions(ctx context.Context, resource string, options ...appLockOption) (appLock, error) {
+	if resource == "" {
+		return nil, errorValidationNotBlank
+	}
+
+	var rsOptions []redsync.Option
+
+	if options != nil {
+		lockOptions := &appLockOptions{}
+		for _, o := range options {
+			o.Apply(lockOptions)
+		}
+
+		if lockOptions.ttl != nil {
+			rsOptions = append(rsOptions, redsync.WithExpiry(*lockOptions.ttl))
+		}
+		if lockOptions.maxRetries != nil {
+			rsOptions = append(rsOptions, redsync.WithTries(*lockOptions.maxRetries))
+		}
+		if lockOptions.retryDelay != nil {
+			rsOptions = append(rsOptions, redsync.WithRetryDelay(*lockOptions.retryDelay))
+		}
+	}
+
+	mu := s.rs.NewMutex(resource, rsOptions...)
+
+	zap.L().Sugar().Debugf("Trying to lock '%s'", resource)
+
+	if err := mu.LockContext(ctx); err != nil {
+		return nil, errLockRedisNotObtained
+	}
+
+	zap.L().Sugar().Debugf("Locked '%s'", resource)
+
+	l := &redisLock{
+		mu: mu,
+	}
+
+	return l, nil
+}
+
+var _ appLock = (*redisLock)(nil)
+
+type redisLock struct {
+	mu *redsync.Mutex
+}
+
+func (r redisLock) unlock(ctx context.Context) error {
+	zap.L().Sugar().Debugf("Unlocking '%s'", r.mu.Name())
+
+	unlocked, err := r.mu.UnlockContext(ctx)
+	if err != nil {
+		return errLockRedisNotReleased
+	}
+	if !unlocked {
+		return errLockRedisNotReleased
+	}
+
+	return nil
+}

server/service_task.go

@@ -69,7 +69,7 @@ func newTaskService(u *updateService, e *eventService, w *webhookService, a *act
 		redisClient := redis.NewClient(redisOptions)
 
 		var locker gocron.Locker
-		if locker, err = redislock.NewRedisLocker(redisClient, redislock.WithTries(1)); err != nil {
+		if locker, err = redislock.NewRedisLocker(redisClient, redislock.WithTries(1), redislock.WithExpiry(30*time.Second), redislock.WithRetryDelay(5*time.Second)); err != nil {
 			zap.L().Sugar().Fatalf("Cannot set up REDIS locker. Reason: %s", err.Error())
 		}
 
@@ -111,7 +111,6 @@ func (s *taskService) stop() {
 	if err := s.scheduler.Shutdown(); err != nil {
 		zap.L().Sugar().Warnf("Cannot shut down scheduler. Reason: %v", err)
 	}
-	s.lockService.stop()
 	zap.L().Info("Stopped all periodic tasks")
 }