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Copy pathsource_config.go
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120 lines (103 loc) · 3.11 KB
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package connet
import (
"fmt"
"time"
)
// SourceConfig structure represents source configuration.
type SourceConfig struct {
Endpoint Endpoint
Route RouteOption
RelayEncryptions []EncryptionScheme
DialTimeout time.Duration
DestinationPolicy LoadBalancePolicy
DestinationRetry LoadBalanceRetry
DestinationRetryMax int
}
// NewSourceConfig creates a source config for a given name.
func NewSourceConfig(name string) SourceConfig {
return SourceConfig{
Endpoint: NewEndpoint(name),
Route: RouteAny,
RelayEncryptions: []EncryptionScheme{NoEncryption},
DestinationPolicy: NoPolicy,
DestinationRetry: NeverRetry,
}
}
// WithRoute sets the route option for this configuration.
func (cfg SourceConfig) WithRoute(route RouteOption) SourceConfig {
cfg.Route = route
return cfg
}
// WithRelayEncryptions sets the relay encryptions option for this configuration.
func (cfg SourceConfig) WithRelayEncryptions(schemes ...EncryptionScheme) SourceConfig {
cfg.RelayEncryptions = schemes
return cfg
}
// WithDialTimeout sets the dial timeout
func (cfg SourceConfig) WithDialTimeout(timeout time.Duration) SourceConfig {
cfg.DialTimeout = timeout
return cfg
}
// WithLoadBalance sets the load balancing behavior for this source
func (cfg SourceConfig) WithLoadBalance(policy LoadBalancePolicy, retry LoadBalanceRetry, max int) SourceConfig {
cfg.DestinationPolicy = policy
cfg.DestinationRetry = retry
cfg.DestinationRetryMax = max
switch {
case cfg.DestinationRetry == CountRetry && cfg.DestinationRetryMax == 0:
cfg.DestinationRetryMax = 2
case cfg.DestinationRetry == TimedRetry && cfg.DestinationRetryMax == 0:
cfg.DestinationRetryMax = 1000
}
return cfg
}
func (cfg SourceConfig) endpointConfig() endpointConfig {
return endpointConfig{
endpoint: cfg.Endpoint,
role: RoleSource,
route: cfg.Route,
}
}
type LoadBalancePolicy struct{ string }
var (
NoPolicy = LoadBalancePolicy{}
LeastLatencyPolicy = LoadBalancePolicy{"least-latency"}
LeastConnsPolicy = LoadBalancePolicy{"least-conns"}
RoundRobinPolicy = LoadBalancePolicy{"round-robin"}
RandomPolicy = LoadBalancePolicy{"random"}
)
func ParseLBPolicy(s string) (LoadBalancePolicy, error) {
switch s {
case NoPolicy.string:
return NoPolicy, nil
case LeastLatencyPolicy.string:
return LeastLatencyPolicy, nil
case LeastConnsPolicy.string:
return LeastConnsPolicy, nil
case RoundRobinPolicy.string:
return RoundRobinPolicy, nil
case RandomPolicy.string:
return RandomPolicy, nil
}
return NoPolicy, fmt.Errorf("invalid load balance policy '%s'", s)
}
type LoadBalanceRetry struct{ string }
var (
NeverRetry = LoadBalanceRetry{}
CountRetry = LoadBalanceRetry{"count"}
TimedRetry = LoadBalanceRetry{"timed"}
AllRetry = LoadBalanceRetry{"all"}
)
func ParseLBRetry(s string) (LoadBalanceRetry, error) {
switch s {
case NeverRetry.string:
return NeverRetry, nil
case CountRetry.string:
return CountRetry, nil
case TimedRetry.string:
return TimedRetry, nil
case AllRetry.string:
return AllRetry, nil
}
return NeverRetry, fmt.Errorf("invalid load balance retry '%s'", s)
}