func (zkts *Server) CreateShard(keyspace, shard string, value *topo.Shard) error {
shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
pathList := []string{
shardPath,
path.Join(shardPath, "action"),
path.Join(shardPath, "actionlog"),
}
alreadyExists := false
for i, zkPath := range pathList {
c := ""
if i == 0 {
c = jscfg.ToJson(value)
}
_, err := zk.CreateRecursive(zkts.zconn, zkPath, c, 0, zookeeper.WorldACL(zookeeper.PERM_ALL))
if err != nil {
if zookeeper.IsError(err, zookeeper.ZNODEEXISTS) {
alreadyExists = true
} else {
return fmt.Errorf("error creating shard: %v %v", zkPath, err)
}
}
}
if alreadyExists {
return topo.ErrNodeExists
}
event.Dispatch(&events.ShardChange{
ShardInfo: *topo.NewShardInfo(keyspace, shard, value, -1),
Status: "created",
})
return nil
}
func siBytes(start, end string) *topo.ShardInfo {
return topo.NewShardInfo("keyspace", start+"-"+end, &topo.Shard{
KeyRange: key.KeyRange{
Start: key.KeyspaceId(start),
End: key.KeyspaceId(end),
},
}, 0)
}
func TestMigrateServedFromSyslogReverse(t *testing.T) {
wantSev, wantMsg := syslog.LOG_INFO, "keyspace-1 [migrate served-from keyspace-2/source-shard <- keyspace-1/dest-shard] status"
ev := &MigrateServedFrom{
Keyspace: *topo.NewKeyspaceInfo("keyspace-1", nil, -1),
SourceShard: *topo.NewShardInfo("keyspace-2", "source-shard", nil, -1),
DestinationShard: *topo.NewShardInfo("keyspace-1", "dest-shard", nil, -1),
Reverse: true,
StatusUpdater: base.StatusUpdater{Status: "status"},
}
gotSev, gotMsg := ev.Syslog()
if gotSev != wantSev {
t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
}
if gotMsg != wantMsg {
t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
}
}
func si(start, end string) *topo.ShardInfo {
s := hki(start)
e := hki(end)
return topo.NewShardInfo("keyspace", s.String()+"-"+e.String(), &topo.Shard{
KeyRange: key.KeyRange{
Start: s,
End: e,
},
}, 0)
}
func TestShardChangeSyslog(t *testing.T) {
wantSev, wantMsg := syslog.LOG_INFO, "keyspace-123/shard-123 [shard] status"
sc := &ShardChange{
ShardInfo: *topo.NewShardInfo("keyspace-123", "shard-123", nil, -1),
Status: "status",
}
gotSev, gotMsg := sc.Syslog()
if gotSev != wantSev {
t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
}
if gotMsg != wantMsg {
t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
}
}
func TestMigrateServedTypesSyslogReverse(t *testing.T) {
wantSev, wantMsg := syslog.LOG_INFO, "keyspace-1 [migrate served-types {src1, src2} <- {dst1, dst2}] status"
ev := &MigrateServedTypes{
Keyspace: *topo.NewKeyspaceInfo("keyspace-1", nil, -1),
SourceShards: []*topo.ShardInfo{
topo.NewShardInfo("keyspace-1", "src1", nil, -1),
topo.NewShardInfo("keyspace-1", "src2", nil, -1),
},
DestinationShards: []*topo.ShardInfo{
topo.NewShardInfo("keyspace-1", "dst1", nil, -1),
topo.NewShardInfo("keyspace-1", "dst2", nil, -1),
},
Reverse: true,
StatusUpdater: base.StatusUpdater{Status: "status"},
}
gotSev, gotMsg := ev.Syslog()
if gotSev != wantSev {
t.Errorf("wrong severity: got %v, want %v", gotSev, wantSev)
}
if gotMsg != wantMsg {
t.Errorf("wrong message: got %v, want %v", gotMsg, wantMsg)
}
}
func (zkts *Server) DeleteShard(keyspace, shard string) error {
shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
err := zk.DeleteRecursive(zkts.zconn, shardPath, -1)
if err != nil {
if zookeeper.IsError(err, zookeeper.ZNONODE) {
err = topo.ErrNoNode
}
return err
}
event.Dispatch(&events.ShardChange{
ShardInfo: *topo.NewShardInfo(keyspace, shard, nil, -1),
Status: "deleted",
})
return nil
}
func (zkts *Server) GetShard(keyspace, shard string) (*topo.ShardInfo, error) {
shardPath := path.Join(globalKeyspacesPath, keyspace, "shards", shard)
data, stat, err := zkts.zconn.Get(shardPath)
if err != nil {
if zookeeper.IsError(err, zookeeper.ZNONODE) {
err = topo.ErrNoNode
}
return nil, err
}
s := &topo.Shard{}
if err = json.Unmarshal([]byte(data), s); err != nil {
return nil, fmt.Errorf("bad shard data %v", err)
}
return topo.NewShardInfo(keyspace, shard, s, int64(stat.Version())), nil
}