open-consul/agent/consul/state/index_connect.go

55 lines
1.5 KiB
Go

package state
import (
"fmt"
"strings"
"github.com/hashicorp/consul/agent/structs"
)
// IndexConnectService indexes a *struct.ServiceNode for querying by
// services that support Connect to some target service. This will
// properly index the proxy destination for proxies and the service name
// for native services.
type IndexConnectService struct{}
func (idx *IndexConnectService) FromObject(obj interface{}) (bool, []byte, error) {
sn, ok := obj.(*structs.ServiceNode)
if !ok {
return false, nil, fmt.Errorf("Object must be ServiceNode, got %T", obj)
}
var result []byte
switch {
case sn.ServiceKind == structs.ServiceKindConnectProxy:
// For proxies, this service supports Connect for the destination
result = []byte(strings.ToLower(sn.ServiceProxyDestination))
case sn.ServiceConnect.Native:
// For native, this service supports Connect directly
result = []byte(strings.ToLower(sn.ServiceName))
default:
// Doesn't support Connect at all
return false, nil, nil
}
// Return the result with the null terminator appended so we can
// differentiate prefix vs. non-prefix matches.
return true, append(result, '\x00'), nil
}
func (idx *IndexConnectService) FromArgs(args ...interface{}) ([]byte, error) {
if len(args) != 1 {
return nil, fmt.Errorf("must provide only a single argument")
}
arg, ok := args[0].(string)
if !ok {
return nil, fmt.Errorf("argument must be a string: %#v", args[0])
}
// Add the null character as a terminator
return append([]byte(strings.ToLower(arg)), '\x00'), nil
}