|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "github.com/pingcap-incubator/tinykv/log" |
| 7 | + "github.com/pingcap-incubator/tinykv/proto/pkg/kvrpcpb" |
| 8 | + "github.com/pingcap-incubator/tinykv/proto/pkg/metapb" |
| 9 | + |
| 10 | + "google.golang.org/grpc" |
| 11 | + |
| 12 | + sched "github.com/pingcap-incubator/tinykv/proto/pkg/pdpb" |
| 13 | + kv "github.com/pingcap-incubator/tinykv/proto/pkg/tinykvpb" |
| 14 | +) |
| 15 | + |
| 16 | +type ctx struct { |
| 17 | + conn kv.TinyKvClient |
| 18 | + h *kvrpcpb.Context |
| 19 | +} |
| 20 | + |
| 21 | +var pdconn *grpc.ClientConn |
| 22 | +var tikvconn *grpc.ClientConn |
| 23 | + |
| 24 | +func locate(key []byte) (*grpc.ClientConn, ctx) { |
| 25 | + if pdconn == nil { |
| 26 | + pd, err := grpc.Dial("127.0.0.1:32379", grpc.WithInsecure(), grpc.WithBlock()) |
| 27 | + if err != nil { |
| 28 | + panic(err) |
| 29 | + } |
| 30 | + pdconn = pd |
| 31 | + } |
| 32 | + |
| 33 | + client := sched.NewPDClient(pdconn) |
| 34 | + var clusterID uint64 |
| 35 | + { |
| 36 | + resp, err := client.GetMembers(context.TODO(), &sched.GetMembersRequest{}) |
| 37 | + |
| 38 | + if err != nil { |
| 39 | + panic(err) |
| 40 | + } |
| 41 | + |
| 42 | + clusterID = resp.Header.ClusterId |
| 43 | + } |
| 44 | + |
| 45 | + var region *metapb.Region |
| 46 | + var leader *metapb.Peer |
| 47 | + { |
| 48 | + resp, err := client.GetRegion(context.TODO(), &sched.GetRegionRequest{ |
| 49 | + Header: &sched.RequestHeader{ClusterId: clusterID}, |
| 50 | + RegionKey: key, |
| 51 | + }) |
| 52 | + |
| 53 | + if err != nil { |
| 54 | + panic(err) |
| 55 | + } |
| 56 | + |
| 57 | + region = resp.Region |
| 58 | + leader = resp.Leader |
| 59 | + } |
| 60 | + |
| 61 | + var store *metapb.Store |
| 62 | + { |
| 63 | + resp, err := client.GetStore(context.TODO(), &sched.GetStoreRequest{ |
| 64 | + Header: &sched.RequestHeader{ClusterId: clusterID}, |
| 65 | + StoreId: leader.StoreId, |
| 66 | + }) |
| 67 | + if err != nil { |
| 68 | + panic(err) |
| 69 | + } |
| 70 | + store = resp.Store |
| 71 | + } |
| 72 | + |
| 73 | + // XXX cache region and close connection in case leader changes |
| 74 | + if tikvconn == nil { |
| 75 | + conn, err := grpc.Dial(store.Address, grpc.WithInsecure(), grpc.WithBlock()) |
| 76 | + if err != nil { |
| 77 | + panic(err) |
| 78 | + } |
| 79 | + tikvconn = conn |
| 80 | + } |
| 81 | + |
| 82 | + return tikvconn, ctx{ |
| 83 | + conn: kv.NewTinyKvClient(tikvconn), |
| 84 | + h: &kvrpcpb.Context{ |
| 85 | + RegionId: region.Id, |
| 86 | + RegionEpoch: region.RegionEpoch, |
| 87 | + Peer: leader, |
| 88 | + }, |
| 89 | + } |
| 90 | +} |
| 91 | + |
| 92 | +func Put(key, val []byte) { |
| 93 | + _, ctx := locate(key) |
| 94 | + _, err := ctx.conn.RawPut(context.TODO(), &kvrpcpb.RawPutRequest{ |
| 95 | + Context: ctx.h, |
| 96 | + Key: key, |
| 97 | + Value: val, |
| 98 | + Cf: "default", |
| 99 | + }) |
| 100 | + |
| 101 | + if err != nil { |
| 102 | + panic(err) |
| 103 | + } |
| 104 | + |
| 105 | + if err != nil { |
| 106 | + panic(err) |
| 107 | + } |
| 108 | +} |
| 109 | + |
| 110 | +func Get(key []byte) []byte { |
| 111 | + _, ctx := locate(key) |
| 112 | + resp, err := ctx.conn.RawGet(context.TODO(), &kvrpcpb.RawGetRequest{ |
| 113 | + Context: ctx.h, |
| 114 | + Key: key, |
| 115 | + Cf: "default", |
| 116 | + }) |
| 117 | + |
| 118 | + if err != nil { |
| 119 | + panic(err) |
| 120 | + } |
| 121 | + |
| 122 | + if err != nil { |
| 123 | + panic(err) |
| 124 | + } |
| 125 | + return resp.Value |
| 126 | +} |
| 127 | + |
| 128 | +func main() { |
| 129 | + for i := 0; i < 128; i++ { |
| 130 | + key := []byte("hello " + fmt.Sprintf("%4d", i)) |
| 131 | + Put(key, []byte("world "+fmt.Sprintf("%4d", i))) |
| 132 | + |
| 133 | + log.Infof("Get val %v", Get(key)) |
| 134 | + } |
| 135 | +} |
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