/
node_manager.go
72 lines (58 loc) · 1.62 KB
/
node_manager.go
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package manager
import (
"context"
"github.com/caser789/dtask/model"
clientv3 "go.etcd.io/etcd/client/v3"
)
type INodeManager interface {
KeepRegister(ctx context.Context) error
HasLeader(ctx context.Context) (bool, error)
IsLeader(ctx context.Context) (bool, error)
GetNodes(ctx context.Context) ([]string, error)
SaveLeaderNodes(ctx context.Context, nodes []string) error
Watch(ctx context.Context) (<-chan []string, error)
}
func NewNodeManager(addr string, client *clientv3.Client) *NodeManager {
return &NodeManager{
addr: addr,
leaderDAO: model.NewLeaderDAO(client),
nodeDao: model.NewNodeDAO(client),
}
}
type NodeManager struct {
addr string
leaderDAO model.ILeaderDAO
nodeDao model.INodeDAO
leaderDataDAO model.ILeaderDataDAO
}
func (m *NodeManager) KeepRegister(ctx context.Context) error {
_, err := m.nodeDao.Register(ctx, m.addr)
if err != nil {
return err
}
m.leaderDAO.Campaign(ctx, m.addr)
return nil
}
func (m *NodeManager) HasLeader(ctx context.Context) (bool, error) {
leader, err := m.leaderDAO.Get(ctx)
if err != nil {
return false, err
}
return leader != "", nil
}
func (m *NodeManager) IsLeader(ctx context.Context) (bool, error) {
leader, err := m.leaderDAO.Get(ctx)
if err != nil {
return false, err
}
return leader == m.addr, nil
}
func (m *NodeManager) GetNodes(ctx context.Context) ([]string, error) {
return m.nodeDao.List(ctx)
}
func (m *NodeManager) SaveLeaderNodes(ctx context.Context, nodes []string) error {
return m.leaderDataDAO.Put(ctx, nodes)
}
func (m *NodeManager) Watch(ctx context.Context) (<-chan []string, error) {
return m.nodeDao.Watch(ctx)
}