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helpers.go
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/
helpers.go
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/*
* Copyright 2019 Marco Helmich
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package calvin
import (
"os"
"github.com/mhelmich/calvin/pb"
"github.com/mhelmich/calvin/sequencer"
"github.com/mhelmich/calvin/ulid"
"github.com/mhelmich/calvin/util"
"github.com/naoina/toml"
log "github.com/sirupsen/logrus"
)
func NewTransaction() *pb.Transaction {
id, err := ulid.NewId()
if err != nil {
log.Panicf("Can't generate new ulid")
}
return &pb.Transaction{
Id: id.ToProto(),
}
}
func defaultOptionsWithFilePaths(configPath string, clusterInfoPath string) Options {
cfg := readConfig(configPath)
cip := util.NewClusterInfoProvider(cfg.RaftID, clusterInfoPath)
return Options{
hostname: cfg.Hostname,
port: cfg.Port,
raftID: cfg.RaftID,
peers: cfg.Peers,
clusterInfoProvider: cip,
}
}
func DefaultOptions(partitionedDataStore util.PartitionedDataStore, clusterInfoProvider util.ClusterInfoProvider) Options {
return Options{
hostname: "localhost",
port: 5432,
raftID: util.RandomRaftId(),
clusterInfoProvider: clusterInfoProvider,
partitionedDataStore: partitionedDataStore,
}
}
type Options struct {
hostname string
port int
storePath string
raftID uint64
peers []uint64
clusterInfoProvider util.ClusterInfoProvider
snapshotHandler sequencer.SnapshotHandler
partitionedDataStore util.PartitionedDataStore
numWorkers int
}
func (o Options) WithSnapshotHandler(snapshotHandler sequencer.SnapshotHandler) Options {
o.snapshotHandler = snapshotHandler
return o
}
func (o Options) WithDataStore(dataStore util.PartitionedDataStore) Options {
o.partitionedDataStore = dataStore
return o
}
func (o Options) WithPort(port int) Options {
o.port = port
return o
}
func (o Options) WithRaftID(raftID uint64) Options {
o.raftID = raftID
return o
}
func (o Options) WithNumWorkers(numWorkers int) Options {
o.numWorkers = numWorkers
return o
}
func (o Options) WithPeers(peers []uint64) Options {
o.peers = peers
return o
}
func (o Options) WithStorePath(storePath string) Options {
o.storePath = storePath
return o
}
type config struct {
RaftID uint64
Hostname string
Port int
StorePath string
Peers []uint64
}
func readConfig(configPath string) config {
f, err := os.Open(configPath)
if err != nil {
log.Panicf("%s\n", err.Error())
}
defer f.Close()
var config config
if err := toml.NewDecoder(f).Decode(&config); err != nil {
log.Panicf("%s\n", err.Error())
}
return config
}