incorporate changes in router implementation

features/routing/balancer.go

@@ -0,0 +1,10 @@
+package routing
+
+type BalancerOverrider interface {
+	SetOverrideTarget(tag, target string) error
+	GetOverrideTarget(tag string) (string, error)
+}
+
+type BalancerPrincipleTarget interface {
+	GetPrincipleTarget(tag string) ([]string, error)
+}

features/routing/health.go

@@ -1,51 +0,0 @@
-package routing
-
-import "time"
-
-// HealthChecker is the interface for health checkers
-type HealthChecker interface {
-	// StartScheduler starts the check scheduler
-	StartScheduler(selector func() ([]string, error))
-	// StopScheduler stops the check scheduler
-	StopScheduler()
-	// Check start the health checking for given tags.
-	Check(tags []string) error
-}
-
-// OutboundInfo holds information of an outbound
-type OutboundInfo struct {
-	Tag    string   // Tag of the outbound
-	Values []string // Information of the outbound, which can be different between strategies, like health ping RTT
-}
-
-// StrategyInfo holds strategy running information, like selected handlers and others
-type StrategyInfo struct {
-	Settings    []string        // Strategy settings
-	ValueTitles []string        // Value titles of OutboundInfo.Values
-	Selects     []*OutboundInfo // Selects of the strategy
-	Others      []*OutboundInfo // Other outbounds
-}
-
-// BalancingOverrideInfo holds balancing override information
-type BalancingOverrideInfo struct {
-	Until   time.Time
-	Selects []string
-}
-
-// BalancerInfo holds information of a balancer
-type BalancerInfo struct {
-	Tag      string // Tag of the balancer
-	Override *BalancingOverrideInfo
-	Strategy *StrategyInfo // Strategy and its running information
-}
-
-// RouterChecker represents a router that is able to perform checks for its balancers, and get statistics.
-type RouterChecker interface {
-	// CheckHanlders performs a health check for specified outbound hanlders.
-	CheckHanlders(tags []string) error
-	// CheckBalancers performs health checks for specified balancers,
-	// if not specified, check them all.
-	CheckBalancers(tags []string) error
-	// GetBalancersInfo get health info of specific balancer, if balancer not specified, get all
-	GetBalancersInfo(tags []string) ([]*BalancerInfo, error)
-}

features/routing/strategy.go

@@ -1,22 +0,0 @@
-package routing
-
-import "time"
-
-// BalancingStrategy is the interface for balancing strategies
-type BalancingStrategy interface {
-	// Pick pick one outbound from candidates. Unlike the SelectAndPick(),
-	// it skips the select procedure (select all & pick one).
-	Pick(candidates []string) string
-	// SelectAndPick selects qualified nodes from candidates then pick one.
-	SelectAndPick(candidates []string) string
-	// GetInformation gets information of the strategy
-	GetInformation(tags []string) *StrategyInfo
-}
-
-// BalancingOverrider is the interface of those who can override
-// the selecting of its balancers
-type BalancingOverrider interface {
-	// OverrideSelecting overrides the selects of specified balancer, for 'validity'
-	// duration of time.
-	OverrideSelecting(balancer string, selects []string, validity time.Duration) error
-}