Add experimental liftbridge backend.

README.md

@@ -16,6 +16,7 @@ Current implementations and their status
 | Nats streaming                           | beta          |
 | Proximo                                  | alpha         |
 | Freezer                                  | alpha         |
+| Liftbridge                               | experimental  |
 
 Additional resources
 ----------------------------------------

go.mod

@@ -8,8 +8,9 @@ require (
 	github.com/gofrs/uuid v3.2.0+incompatible
 	github.com/google/uuid v1.1.1
 	github.com/hashicorp/go-multierror v1.0.0
+	github.com/liftbridge-io/go-liftbridge v1.0.1-0.20200707183953-f9c0b883e534
 	github.com/nats-io/nats-streaming-server v0.16.2
-	github.com/nats-io/nats.go v1.9.0
+	github.com/nats-io/nats.go v1.9.2
 	github.com/nats-io/stan.go v0.5.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.2.1
@@ -21,5 +22,5 @@ require (
 	github.com/uw-labs/straw v0.0.0-20200213162553-01e9a0f94f69
 	github.com/uw-labs/sync v0.0.0-20190307114256-1bb306bf6e71
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
-	google.golang.org/grpc v1.27.0
+	google.golang.org/grpc v1.30.0
 )

go.sum

@@ -52,6 +52,7 @@ github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tj
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -63,7 +64,9 @@ github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21 h1:YEetp8
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0 h1:YOEu7KNc61ntiQlcEeUIoDTJ2o8mQznoNvUhiigpIqc=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8vw=
 github.com/fortytw2/leaktest v1.3.0/go.mod h1:jDsjWgpAGjm2CA7WthBh/CdZYEPF31XHquHwclZch5g=
@@ -87,6 +90,8 @@ github.com/gofrs/uuid v3.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRx
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
+github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
@@ -100,6 +105,16 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
+github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
+github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1 h1:ZFgWrT+bLgsYPirOnRfKLYJLvssAegOj/hgyMFdJZe0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
+github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
+github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@@ -111,6 +126,8 @@ github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.0 h1:/QaMHBdZ26BB3SSst0Iwl10Epc+xhTquomWX0oZEB6w=
+github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/martian v2.1.0+incompatible h1:/CP5g8u/VJHijgedC/Legn3BAbAaWPgecwXBIDzw5no=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
@@ -161,6 +178,7 @@ github.com/jstemmer/go-junit-report v0.9.1 h1:6QPYqodiu3GuPL+7mfx+NwDdp2eTkp9IfE
 github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
+github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.9.8/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.10.3 h1:OP96hzwJVBIHYU52pVTI6CczrxPvrGfgqF9N5eTO0Q8=
@@ -180,6 +198,14 @@ github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.2.0 h1:LXpIM/LZ5xGFhOpXAQUIMM1HdyqzVYM13zNdjCEEcA0=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
+github.com/liftbridge-io/go-liftbridge v1.0.0 h1:jurJ7e4td0VZWnydxA9tkpnucXfyG1xWgqqhVUf+6qU=
+github.com/liftbridge-io/go-liftbridge v1.0.0/go.mod h1:NB05QqMHnpyaAkgZaMA4PxDmvWbV4X1Ck+y+kshLPZY=
+github.com/liftbridge-io/go-liftbridge v1.0.1-0.20200707183953-f9c0b883e534 h1:e2SRQzMjgDD9vqU2hlmf6lhgh1U/ZewyFRkfQYBmRnM=
+github.com/liftbridge-io/go-liftbridge v1.0.1-0.20200707183953-f9c0b883e534/go.mod h1:+TtlTK0BEDqlEo2mtIauBN/QwDsz7lViQfDkhYOaFYg=
+github.com/liftbridge-io/liftbridge-api v1.0.0 h1:rtbdxtPq/ebPK7Og9mSbziDsQ2WZpPE7ZVL/BKc3CPU=
+github.com/liftbridge-io/liftbridge-api v1.0.0/go.mod h1:6IFEFZ4ncnOgeDVjSt0vh1lKNhlJ5YT9xnG1eRa9LC8=
+github.com/liftbridge-io/liftbridge-api v1.0.1-0.20200703154436-52124ef6c36f h1:Q0NrEFeuk5v+LgswEF82p0RWEJ8tqIsmV7ewPNfCKms=
+github.com/liftbridge-io/liftbridge-api v1.0.1-0.20200703154436-52124ef6c36f/go.mod h1:6IFEFZ4ncnOgeDVjSt0vh1lKNhlJ5YT9xnG1eRa9LC8=
 github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -191,18 +217,28 @@ github.com/nats-io/jwt v0.2.6/go.mod h1:mQxQ0uHQ9FhEVPIcTSKwx2lqZEpXWWcCgA7R6NrW
 github.com/nats-io/jwt v0.2.14/go.mod h1:fRYCDE99xlTsqUzISS1Bi75UBJ6ljOJQOAAu5VglpSg=
 github.com/nats-io/jwt v0.3.0 h1:xdnzwFETV++jNc4W1mw//qFyJGb2ABOombmZJQS4+Qo=
 github.com/nats-io/jwt v0.3.0/go.mod h1:fRYCDE99xlTsqUzISS1Bi75UBJ6ljOJQOAAu5VglpSg=
+github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
+github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
 github.com/nats-io/nats-server/v2 v2.0.0/go.mod h1:RyVdsHHvY4B6c9pWG+uRLpZ0h0XsqiuKp2XCTurP5LI=
 github.com/nats-io/nats-server/v2 v2.0.4 h1:XOMeQRbhl1lGNTIctPhih6pTa15NGif54Uas6ZW5q7g=
 github.com/nats-io/nats-server/v2 v2.0.4/go.mod h1:AWdGEVbjKRS9ZIx4DSP5eKW48nfFm7q3uiSkP/1KD7M=
+github.com/nats-io/nats-server/v2 v2.1.4 h1:BILRnsJ2Yb/fefiFbBWADpViGF69uh4sxe8poVDQ06g=
+github.com/nats-io/nats-server/v2 v2.1.4/go.mod h1:Jw1Z28soD/QasIA2uWjXyM9El1jly3YwyFOuR8tH1rg=
 github.com/nats-io/nats-streaming-server v0.15.1/go.mod h1:bJ1+2CS8MqvkGfr/NwnCF+Lw6aLnL3F5kenM8bZmdCw=
 github.com/nats-io/nats-streaming-server v0.16.2 h1:RyTg8dZ+A8LaDEEmh9BoHFxWJSuSrIGJ4xjsr0fLMeY=
 github.com/nats-io/nats-streaming-server v0.16.2/go.mod h1:P12vTqmBpT6Ufs+cu0W1C4N2wmISqa6G4xdLQeO2e2s=
 github.com/nats-io/nats.go v1.8.1/go.mod h1:BrFz9vVn0fU3AcH9Vn4Kd7W0NpJ651tD5omQ3M8LwxM=
 github.com/nats-io/nats.go v1.9.0 h1:X/3zBKGR6PKPh8hg2GPayXF2yXpSxV/qYAKx+XPNtR0=
 github.com/nats-io/nats.go v1.9.0/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzEE/Zbp4w=
+github.com/nats-io/nats.go v1.9.1/go.mod h1:ZjDU1L/7fJ09jvUSRVBR2e7+RnLiiIQyqyzEE/Zbp4w=
+github.com/nats-io/nats.go v1.9.2 h1:oDeERm3NcZVrPpdR/JpGdWHMv3oJ8yY30YwxKq+DU2s=
+github.com/nats-io/nats.go v1.9.2/go.mod h1:AjGArbfyR50+afOUotNX2Xs5SYHf+CoOa5HH1eEl2HE=
 github.com/nats-io/nkeys v0.0.2/go.mod h1:dab7URMsZm6Z/jp9Z5UGa87Uutgc2mVpXLC4B7TDb/4=
 github.com/nats-io/nkeys v0.1.0 h1:qMd4+pRHgdr1nAClu+2h/2a5F2TmKcCzjCDazVgRoX4=
 github.com/nats-io/nkeys v0.1.0/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.4 h1:aEsHIssIk6ETN5m2/MD8Y4B2X7FfXrBAUdkyRvbVYzA=
+github.com/nats-io/nkeys v0.1.4/go.mod h1:XdZpAbhgyyODYqjTawOnIOI7VlbKSarI9Gfy1tqEu/s=
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/nats-io/stan.go v0.4.5/go.mod h1:Ji7mK6gRZJSH1nc3ZJH6vi7zn/QnZhpR9Arm4iuzsUQ=
@@ -297,6 +333,10 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20200204104054-c9f3fb736b72/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200210222208-86ce3cb69678 h1:wCWoJcFExDgyYx2m2hpHgwz8W3+FPdfldvIgzqDIhyg=
 golang.org/x/crypto v0.0.0-20200210222208-86ce3cb69678/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200420201142-3c4aac89819a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -341,6 +381,10 @@ golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200513185701-a91f0712d120 h1:EZ3cVSzKOlJxAd8e8YAJ7no8nNypTxexh/YE/xW3ZEY=
+golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200625001655-4c5254603344 h1:vGXIOMxbNfDTk/aXCmfdLgkrSV+Z2tcbze+pEc3v5W4=
+golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be h1:vEDujvNQGv4jgYKudGeI/+DAX4Jffq6hpD55MmoEvKs=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -375,14 +419,22 @@ golang.org/x/sys v0.0.0-20191010194322-b09406accb47 h1:/XfQ9z7ib8eEJX2hdgFTZJ/nt
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8 h1:JA8d3MPx/IToSyXZG/RhwYEtfrKO1Fxrqe8KrkiLXKM=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200513112337-417ce2331b5c h1:kISX68E8gSkNYAFRFiDU8rl5RIn1sJYKYb/r2vMLDrU=
+golang.org/x/sys v0.0.0-20200513112337-417ce2331b5c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
+golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
@@ -440,13 +492,36 @@ google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvx
 google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
 google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb h1:ADPHZzpzM4tk4V4S5cnCrr5SwzvlrPRmqqCuJDB8UTs=
 google.golang.org/genproto v0.0.0-20191230161307-f3c370f40bfb/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884 h1:fiNLklpBwWK1mth30Hlwk+fcdBmIALlgF5iy77O37Ig=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20200702021140-07506425bd67 h1:4BC1C1i30F3MZeiIO6y6IIo4DxrtOwITK87bQl3lhFA=
+google.golang.org/genproto v0.0.0-20200702021140-07506425bd67/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0 h1:rRYRFMVgRv6E0D70Skyfsr28tDXIuuPZyWGMPdMcnXg=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.29.1 h1:EC2SB8S04d2r73uptxphDSUG+kTKVgjRPF+N3xpxRB4=
+google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
+google.golang.org/grpc v1.30.0 h1:M5a8xTlYTxwMn5ZFkwhRabsygDY5G8TYLyQDBxJNAxE=
+google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.31.0 h1:T7P4R73V3SSDPhH7WW7ATbfViLtmamH0DKrP3f9AuDI=
+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=
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+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
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 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

liftbridge/integration_test.go

@@ -0,0 +1,157 @@
+package liftbridge
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	lift "github.com/liftbridge-io/go-liftbridge"
+	"github.com/uw-labs/substrate"
+	"github.com/uw-labs/substrate/internal/testshared"
+)
+
+func TestAll(t *testing.T) {
+	k, err := runServer()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer k.Kill()
+
+	testshared.TestAll(t, k)
+}
+
+type testServer struct {
+	containerName string
+	port          int
+	clusterID     string
+	client        lift.Client
+}
+
+func (s *testServer) NewConsumer(topic string, _ string) substrate.AsyncMessageSource {
+	if err := s.client.CreateStream(context.Background(), topic, topic); err != nil {
+		if err != lift.ErrStreamExists {
+			panic(err)
+		}
+	}
+	source, err := NewAsyncMessageSource(AsyncMessageSourceConfig{
+		Brokers: []string{"localhost:9292"},
+		Topic:   topic,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return source
+}
+
+func (s *testServer) NewProducer(topic string) substrate.AsyncMessageSink {
+	if err := s.client.CreateStream(context.Background(), topic, topic); err != nil {
+		if err != lift.ErrStreamExists {
+			panic(err)
+		}
+	}
+	sink, err := NewAsyncMessageSink(AsyncMessageSinkConfig{
+		Brokers: []string{"localhost:9292"},
+		Topic:   topic,
+	})
+	if err != nil {
+		panic(err)
+	}
+	return sink
+}
+
+func (s *testServer) TestEnd() {}
+
+func (s *testServer) Kill() error {
+	if err := s.client.Close(); err != nil {
+		return err
+	}
+
+	cmd := exec.Command("docker", "rm", "-f", s.containerName)
+
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("error removing container: %s", out)
+	}
+	return nil
+}
+
+func runServer() (*testServer, error) {
+	containerName := uuid.New().String()
+
+	cmd := exec.CommandContext(
+		context.Background(),
+		"docker",
+		"run",
+		"-d",
+		"--rm",
+		"--name", containerName,
+		"-p", "4222:4222",
+		"-p", "9292:9292",
+		"-p", "8222:8222",
+		"-p", "6222:6222",
+		"liftbridge/standalone-dev",
+	)
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	port := 0
+	// wait for container to start up
+loop:
+	for {
+		portCmd := exec.Command("docker", "port", containerName, "4222/tcp")
+
+		out, err := portCmd.CombinedOutput()
+		switch {
+		case err == nil:
+			outS := string(out) // e.g., 0.0.0.0:32776
+			ps := strings.Split(outS, ":")
+			if len(ps) != 2 {
+				cmd.Process.Kill()
+				return nil, fmt.Errorf("docker port returned something strange: %s", outS)
+			}
+			p, err := strconv.Atoi(strings.TrimSpace(ps[1]))
+			if err != nil {
+				cmd.Process.Kill()
+				return nil, fmt.Errorf("docker port returned something strange: %s", outS)
+			}
+			port = p
+			break loop
+		case bytes.Contains(out, []byte("No such container:")):
+			// Still starting up. Wait a while.
+			time.Sleep(time.Millisecond * 100)
+		default:
+			return nil, err
+		}
+	}
+
+	s := &testServer{
+		containerName: containerName,
+		port:          port,
+		clusterID:     "test-cluster",
+	}
+
+loop2:
+	for {
+		client, err := lift.Connect([]string{"localhost:9292"})
+		if err == nil {
+			s.client = client
+			if err := s.client.CreateStream(context.Background(), "liftbridge-test-topic", "liftbridge-test-topic"); err != nil {
+				if err != lift.ErrStreamExists {
+					_ = s.client.Close()
+					continue
+				}
+			}
+			break loop2
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+
+	return s, nil
+}

liftbridge/sink.go

@@ -0,0 +1,70 @@
+package liftbridge
+
+import (
+	"context"
+
+	lift "github.com/liftbridge-io/go-liftbridge"
+	"github.com/uw-labs/substrate"
+)
+
+type AsyncMessageSinkConfig struct {
+	Brokers []string
+	Topic   string
+}
+
+func NewAsyncMessageSink(cfg AsyncMessageSinkConfig) (substrate.AsyncMessageSink, error) {
+	client, err := lift.Connect(cfg.Brokers)
+	if err != nil {
+		return nil, err
+	}
+
+	return &asyncMessageSink{
+		client: client,
+		topic:  cfg.Topic,
+	}, nil
+}
+
+type asyncMessageSink struct {
+	client lift.Client
+	topic  string
+}
+
+func (ams *asyncMessageSink) PublishMessages(ctx context.Context, acks chan<- substrate.Message, messages <-chan substrate.Message) error {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	ackErr := make(chan error, 1)
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case err := <-ackErr:
+			return err
+		case msg := <-messages:
+			if err := ams.client.PublishAsync(ctx, ams.topic, msg.Data(), func(ack *lift.Ack, err error) {
+				if err != nil {
+					select {
+					case <-ctx.Done():
+					case ackErr <- err:
+					}
+					return
+				}
+				select {
+				case <-ctx.Done():
+				case acks <- msg:
+				}
+			}, lift.AckPolicyAll()); err != nil {
+				return err
+			}
+		}
+	}
+
+}
+
+func (ams *asyncMessageSink) Close() error {
+	return ams.client.Close()
+}
+
+func (ams *asyncMessageSink) Status() (*substrate.Status, error) {
+	return &substrate.Status{Working: true}, nil
+}

liftbridge/source.go

@@ -0,0 +1,120 @@
+package liftbridge
+
+import (
+	"context"
+
+	lift "github.com/liftbridge-io/go-liftbridge"
+	"github.com/uw-labs/substrate"
+)
+
+type AsyncMessageSourceConfig struct {
+	Brokers []string
+	Topic   string
+	Offset  int64
+}
+
+func NewAsyncMessageSource(cfg AsyncMessageSourceConfig) (substrate.AsyncMessageSource, error) {
+	client, err := lift.Connect(cfg.Brokers)
+	if err != nil {
+		return nil, err
+	}
+
+	return &asyncMessageSource{
+		client: client,
+		topic:  cfg.Topic,
+	}, nil
+}
+
+type asyncMessageSource struct {
+	client lift.Client
+	topic  string
+	offset int64
+}
+
+func (ams *asyncMessageSource) ConsumeMessages(ctx context.Context, messages chan<- substrate.Message, acks <-chan substrate.Message) error {
+	subCh := make(chan *lift.Message)
+	subErrCh := make(chan error, 1)
+
+	if err := ams.client.Subscribe(ctx, ams.topic, func(msg *lift.Message, err error) {
+		if err != nil {
+			select {
+			case <-ctx.Done():
+			case subErrCh <- err:
+			}
+			return
+		}
+		select {
+		case <-ctx.Done():
+		case subCh <- msg:
+		}
+
+	}, lift.StartAtOffset(ams.offset)); err != nil {
+		return err
+	}
+
+	var expectedAcks []substrate.Message
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case err := <-subErrCh:
+			return err
+		case msg := <-subCh:
+			sMsgs := &message{
+				data:   msg.Value(),
+				offset: msg.Offset(),
+			}
+			expectedAcks = append(expectedAcks, sMsgs)
+			select {
+			case <-ctx.Done():
+			case messages <- sMsgs:
+			}
+		case ack := <-acks:
+			msg, ok := ack.(*message)
+			if !ok {
+				if len(expectedAcks) > 0 {
+					return substrate.InvalidAckError{
+						Acked:    ack,
+						Expected: expectedAcks[0],
+					}
+				}
+				return substrate.InvalidAckError{Acked: ack}
+			}
+			switch {
+			case len(expectedAcks) == 0:
+				return substrate.InvalidAckError{
+					Acked:    ack,
+					Expected: nil,
+				}
+			case expectedAcks[0] != msg:
+				return substrate.InvalidAckError{
+					Acked:    ack,
+					Expected: expectedAcks[0],
+				}
+			default:
+				expectedAcks = expectedAcks[1:]
+			}
+		}
+	}
+}
+
+func (ams *asyncMessageSource) Close() error {
+	return ams.client.Close()
+}
+
+func (ams *asyncMessageSource) Status() (*substrate.Status, error) {
+	return &substrate.Status{Working: true}, nil
+}
+
+type message struct {
+	data   []byte
+	offset int64
+}
+
+func (m *message) Data() []byte {
+	return m.data
+}
+
+func (m *message) Offset() int64 {
+	return m.offset
+}