func (dt *DTable) zmq_promoteKey_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTablePromoteKey)
reqItem := new(kvItem)
reqItem.lock = new(sync.Mutex)
reqItem.from_protobuf(pbMsg.GetItem())
// send out the event to delegator
ev := &dtableEvent{
evType: evPromoteKey,
vnode: dendrite.VnodeFromProtobuf(pbMsg.GetDest()),
item: reqItem,
}
dt.dtable_c <- ev
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
setResp := &PBDTableResponse{
Ok: proto.Bool(true),
}
// encode and send the response
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetReplicaHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}
func (dt *DTable) zmq_status_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableStatus)
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
_, ok := dt.table[dest_key_str]
setResp := &PBDTableResponse{}
if !ok {
setResp.Ok = proto.Bool(false)
setResp.Error = proto.String("local dtable vnode not found")
} else {
setResp.Ok = proto.Bool(true)
}
// encode and send the response
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::StatusHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}
func (dt *DTable) zmq_setReplica_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableSetItem)
reqItem := new(kvItem)
reqItem.lock = new(sync.Mutex)
reqItem.from_protobuf(pbMsg.GetItem())
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
_, ok := dt.table[dest_key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetReplicaHandler - local vnode table not found")
w <- errorMsg
return
}
setResp := &PBDTableResponse{
Ok: proto.Bool(true),
}
dt.setReplica(dest, reqItem)
// encode and send the response
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetReplicaHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}
func replicaInfo_from_protobuf(pb *PBDTableReplicaInfo) *kvReplicaInfo {
if pb == nil {
return nil
}
rInfo := new(kvReplicaInfo)
rInfo.master = dendrite.VnodeFromProtobuf(pb.GetMaster())
rInfo.vnodes = make([]*dendrite.Vnode, 0)
for _, pb_vnode := range pb.GetVnodes() {
rInfo.vnodes = append(rInfo.vnodes, dendrite.VnodeFromProtobuf(pb_vnode))
}
rInfo.orphan_vnodes = make([]*dendrite.Vnode, 0)
for _, pb_orphanVnode := range pb.GetOrphanVnodes() {
rInfo.orphan_vnodes = append(rInfo.orphan_vnodes, dendrite.VnodeFromProtobuf(pb_orphanVnode))
}
rInfo.state = replicaState(int(pb.GetState()))
rInfo.depth = int(pb.GetDepth())
return rInfo
}
func (dt *DTable) zmq_clearreplica_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableClearReplica)
keyHash := pbMsg.GetKeyHash()
demoted := pbMsg.GetDemoted()
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
r_table, ok := dt.rtable[dest_key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::ClearReplicaHandler - local vnode table not found")
w <- errorMsg
return
}
key_str := fmt.Sprintf("%x", keyHash)
if demoted {
d_table, _ := dt.demoted_table[dest_key_str]
if _, ok := d_table[key_str]; ok {
delete(d_table, key_str)
} else {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::ClearReplicaHandler - key " + key_str + " not found in demoted table")
w <- errorMsg
return
}
} else {
if _, ok := r_table[key_str]; ok {
delete(r_table, key_str)
} else {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::ClearReplicaHandler - key " + key_str + " not found in replica table on vnode " + dest.String())
w <- errorMsg
return
}
}
// encode and send the response
setResp := &PBDTableResponse{
Ok: proto.Bool(true),
}
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::ClearReplicaHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}
func (dt *DTable) zmq_get_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableGetItem)
keyHash := pbMsg.GetKeyHash()
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
vn_table, ok := dt.table[dest_key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::GetHandler - local vnode table not found")
w <- errorMsg
return
}
key_str := fmt.Sprintf("%x", keyHash)
var itemResp *PBDTableItem
if localItem, ok := vn_table[key_str]; ok {
itemResp = localItem.to_protobuf()
itemResp.Found = proto.Bool(true)
} else {
itemResp = &PBDTableItem{
Found: proto.Bool(false),
}
}
// encode and send the response
pbdata, err := proto.Marshal(itemResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::GetHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableItem,
Data: pbdata,
}
return
}
func (dt *DTable) zmq_setReplicaInfo_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableSetReplicaInfo)
rInfo := replicaInfo_from_protobuf(pbMsg.GetReplicaInfo())
keyHash := pbMsg.GetKeyHash()
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
vn_table, ok := dt.rtable[dest_key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetMetaHandler - local vnode table not found")
w <- errorMsg
return
}
key_str := fmt.Sprintf("%x", keyHash)
item, ok := vn_table[key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetMetaHandler - key not found")
w <- errorMsg
return
}
item.replicaInfo = rInfo
// encode and send the response
setResp := &PBDTableResponse{
Ok: proto.Bool(true),
}
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetMetaHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}
func (dt *DTable) zmq_set_handler(request *dendrite.ChordMsg, w chan *dendrite.ChordMsg) {
pbMsg := request.TransportMsg.(PBDTableSetItem)
reqItem := new(kvItem)
reqItem.lock = new(sync.Mutex)
reqItem.from_protobuf(pbMsg.GetItem())
demoting := pbMsg.GetDemoting()
minAcks := int(pbMsg.GetMinAcks())
dest := dendrite.VnodeFromProtobuf(pbMsg.GetDest())
origin := dendrite.VnodeFromProtobuf(pbMsg.GetOrigin())
dest_key_str := fmt.Sprintf("%x", dest.Id)
zmq_transport := dt.transport.(*dendrite.ZMQTransport)
// make sure destination vnode exists locally
_, ok := dt.table[dest_key_str]
if !ok {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetHandler - local vnode table not found")
w <- errorMsg
return
}
setResp := &PBDTableResponse{
Ok: proto.Bool(false),
}
if demoting {
old_master := reqItem.replicaInfo.master
reqItem.replicaInfo.master = dest
reqItem.lock.Lock()
err := dt.table[dest_key_str].put(reqItem)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetHandler - demote received error on - " + err.Error())
w <- errorMsg
reqItem.lock.Unlock()
return
}
go dt.processDemoteKey(dest, origin, old_master, reqItem)
setResp.Ok = proto.Bool(true)
reqItem.lock.Unlock()
} else {
wait := make(chan error)
go dt.set(dest, reqItem, minAcks, wait)
err := <-wait
if err != nil {
setResp.Error = proto.String("ZMQ::DTable::SetHandler - error executing transaction - " + err.Error())
} else {
setResp.Ok = proto.Bool(true)
}
}
// encode and send the response
pbdata, err := proto.Marshal(setResp)
if err != nil {
errorMsg := zmq_transport.NewErrorMsg("ZMQ::DTable::SetHandler - failed to marshal response - " + err.Error())
w <- errorMsg
return
}
w <- &dendrite.ChordMsg{
Type: PbDtableResponse,
Data: pbdata,
}
return
}