94 lines
1.5 KiB
Go
94 lines
1.5 KiB
Go
package selector
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import (
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"math/rand"
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"time"
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"github.com/micro/go-micro/registry"
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)
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type randomSelector struct {
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so Options
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}
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func init() {
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rand.Seed(time.Now().Unix())
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}
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func (r *randomSelector) Select(service string, opts ...SelectOption) (Next, error) {
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var sopts SelectOptions
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for _, opt := range opts {
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opt(&sopts)
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}
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// get the service
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services, err := r.so.Registry.GetService(service)
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if err != nil {
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return nil, err
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}
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// apply the filters
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for _, filter := range sopts.Filters {
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services = filter(services)
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}
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// if there's nothing left, return
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if len(services) == 0 {
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return nil, ErrNotFound
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}
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var nodes []*registry.Node
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for _, service := range services {
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for _, node := range service.Nodes {
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nodes = append(nodes, node)
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}
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}
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if len(nodes) == 0 {
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return nil, ErrNotFound
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}
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return func() (*registry.Node, error) {
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i := rand.Int()
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j := i % len(services)
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if len(services[j].Nodes) == 0 {
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return nil, ErrNotFound
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}
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k := i % len(services[j].Nodes)
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return services[j].Nodes[k], nil
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}, nil
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}
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func (r *randomSelector) Mark(service string, node *registry.Node, err error) {
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return
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}
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func (r *randomSelector) Reset(service string) {
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return
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}
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func (r *randomSelector) Close() error {
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return nil
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}
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func (r *randomSelector) String() string {
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return "random"
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}
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func newRandomSelector(opts ...Option) Selector {
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var sopts Options
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for _, opt := range opts {
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opt(&sopts)
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}
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if sopts.Registry == nil {
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sopts.Registry = registry.DefaultRegistry
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}
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return &randomSelector{sopts}
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}
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