func (self *CoordinatorImpl) sendRequestToReplicas(request *protocol.Request, replicas []*ClusterServer) {
for _, server := range replicas {
if server.Id != self.clusterConfiguration.localServerId {
err := server.MakeRequest(request, nil)
if err != nil {
log.Warn("REPLICATION ERROR: ", request.GetSequenceNumber(), err)
}
}
}
}
func (self *ProtobufRequestHandler) HandleRequest(request *protocol.Request, conn net.Conn) error {
if *request.Type == protocol.Request_PROXY_WRITE {
response := &protocol.Response{RequestId: request.Id, Type: &self.writeOk}
request.OriginatingServerId = &self.clusterConfig.localServerId
// TODO: make request logging and datastore write atomic
replicationFactor := self.clusterConfig.GetReplicationFactor(request.Database)
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
return err
}
err = self.db.WriteSeriesData(*request.Database, request.Series)
if err != nil {
return err
}
err = self.WriteResponse(conn, response)
// TODO: add quorum writes?
self.coordinator.ReplicateWrite(request)
return err
} else if *request.Type == protocol.Request_PROXY_DROP_SERIES {
response := &protocol.Response{RequestId: request.Id, Type: &self.writeOk}
request.OriginatingServerId = &self.clusterConfig.localServerId
replicationFactor := uint8(*request.ReplicationFactor)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
return err
}
err = self.db.DropSeries(*request.Database, *request.Series.Name)
if err != nil {
return err
}
err = self.WriteResponse(conn, response)
self.coordinator.ReplicateWrite(request)
return err
} else if *request.Type == protocol.Request_REPLICATION_DROP_SERIES {
replicationFactor := uint8(*request.ReplicationFactor)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
switch err := err.(type) {
case datastore.SequenceMissingRequestsError:
log.Warn("Missing sequence number error: Request SN: %v Last Known SN: %v", request.GetSequenceNumber(), err.LastKnownRequestSequence)
go self.coordinator.ReplayReplication(request, &replicationFactor, request.OwnerServerId, &err.LastKnownRequestSequence)
return nil
default:
return err
}
}
return self.db.DropSeries(*request.Database, *request.Series.Name)
} else if *request.Type == protocol.Request_PROXY_DROP_DATABASE {
response := &protocol.Response{RequestId: request.Id, Type: &self.writeOk}
request.OriginatingServerId = &self.clusterConfig.localServerId
replicationFactor := uint8(*request.ReplicationFactor)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
return err
}
err = self.db.DropDatabase(*request.Database)
if err != nil {
return err
}
err = self.WriteResponse(conn, response)
self.coordinator.ReplicateWrite(request)
return err
} else if *request.Type == protocol.Request_REPLICATION_DROP_DATABASE {
replicationFactor := uint8(*request.ReplicationFactor)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
switch err := err.(type) {
case datastore.SequenceMissingRequestsError:
log.Warn("Missing sequence number error: Request SN: %v Last Known SN: %v", request.GetSequenceNumber(), err.LastKnownRequestSequence)
go self.coordinator.ReplayReplication(request, &replicationFactor, request.OwnerServerId, &err.LastKnownRequestSequence)
return nil
default:
return err
}
}
return self.db.DropDatabase(*request.Database)
} else if *request.Type == protocol.Request_PROXY_DELETE {
response := &protocol.Response{RequestId: request.Id, Type: &self.writeOk}
request.OriginatingServerId = &self.clusterConfig.localServerId
// TODO: make request logging and datastore write atomic
replicationFactor := self.clusterConfig.GetReplicationFactor(request.Database)
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
return err
}
query, err := parser.ParseQuery(*request.Query)
if err != nil {
return err
}
err = self.db.DeleteSeriesData(*request.Database, query[0].DeleteQuery)
if err != nil {
return err
}
err = self.WriteResponse(conn, response)
// TODO: add quorum writes?
self.coordinator.ReplicateDelete(request)
return err
} else if *request.Type == protocol.Request_REPLICATION_WRITE {
replicationFactor := self.clusterConfig.GetReplicationFactor(request.Database)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
switch err := err.(type) {
case datastore.SequenceMissingRequestsError:
log.Warn("Missing sequence number error: Request SN: %v Last Known SN: %v", request.GetSequenceNumber(), err.LastKnownRequestSequence)
go self.coordinator.ReplayReplication(request, &replicationFactor, request.OwnerServerId, &err.LastKnownRequestSequence)
return nil
default:
return err
}
}
self.db.WriteSeriesData(*request.Database, request.Series)
return nil
} else if *request.Type == protocol.Request_REPLICATION_DELETE {
replicationFactor := self.clusterConfig.GetReplicationFactor(request.Database)
// TODO: make request logging and datastore write atomic
err := self.db.LogRequestAndAssignSequenceNumber(request, &replicationFactor, request.OwnerServerId)
if err != nil {
switch err := err.(type) {
case datastore.SequenceMissingRequestsError:
go self.coordinator.ReplayReplication(request, &replicationFactor, request.OwnerServerId, &err.LastKnownRequestSequence)
return nil
default:
return err
}
}
query, err := parser.ParseQuery(*request.Query)
if err != nil {
return err
}
return self.db.DeleteSeriesData(*request.Database, query[0].DeleteQuery)
} else if *request.Type == protocol.Request_QUERY {
go self.handleQuery(request, conn)
} else if *request.Type == protocol.Request_LIST_SERIES {
go self.handleListSeries(request, conn)
} else if *request.Type == protocol.Request_REPLICATION_REPLAY {
self.handleReplay(request, conn)
} else if *request.Type == protocol.Request_SEQUENCE_NUMBER {
self.handleSequenceNumberRequest(request, conn)
} else {
log.Error("unknown request type: %v", request)
return errors.New("Unknown request type")
}
return nil
}