initial commit

chain/node.go

@@ -0,0 +1,97 @@
+package chain
+
+import (
+	"sync/atomic"
+	"time"
+
+	"github.com/go-gost/core/bypass"
+	"github.com/go-gost/core/hosts"
+	"github.com/go-gost/core/resolver"
+)
+
+type Node struct {
+	Name      string
+	Addr      string
+	Transport *Transport
+	Bypass    bypass.Bypass
+	Resolver  resolver.Resolver
+	Hosts     hosts.HostMapper
+	Marker    *FailMarker
+}
+
+func (node *Node) Copy() *Node {
+	n := &Node{}
+	*n = *node
+	return n
+}
+
+type NodeGroup struct {
+	nodes    []*Node
+	selector Selector
+}
+
+func NewNodeGroup(nodes ...*Node) *NodeGroup {
+	return &NodeGroup{
+		nodes: nodes,
+	}
+}
+
+func (g *NodeGroup) AddNode(node *Node) {
+	g.nodes = append(g.nodes, node)
+}
+
+func (g *NodeGroup) WithSelector(selector Selector) *NodeGroup {
+	g.selector = selector
+	return g
+}
+
+func (g *NodeGroup) Next() *Node {
+	if g == nil || len(g.nodes) == 0 {
+		return nil
+	}
+
+	s := g.selector
+	if s == nil {
+		s = DefaultSelector
+	}
+
+	return s.Select(g.nodes...)
+}
+
+type FailMarker struct {
+	failTime  int64
+	failCount int64
+}
+
+func (m *FailMarker) FailTime() int64 {
+	if m == nil {
+		return 0
+	}
+
+	return atomic.LoadInt64(&m.failTime)
+}
+
+func (m *FailMarker) FailCount() int64 {
+	if m == nil {
+		return 0
+	}
+
+	return atomic.LoadInt64(&m.failCount)
+}
+
+func (m *FailMarker) Mark() {
+	if m == nil {
+		return
+	}
+
+	atomic.AddInt64(&m.failCount, 1)
+	atomic.StoreInt64(&m.failTime, time.Now().Unix())
+}
+
+func (m *FailMarker) Reset() {
+	if m == nil {
+		return
+	}
+
+	atomic.StoreInt64(&m.failCount, 0)
+}