services/mgmt/debug/dispatcher.go

package debug

import (
	"strings"
	"time"

	"veyron.io/veyron/veyron/services/mgmt/lib/toplevelglob"
	logreaderimpl "veyron.io/veyron/veyron/services/mgmt/logreader/impl"
	pprofimpl "veyron.io/veyron/veyron/services/mgmt/pprof/impl"
	statsimpl "veyron.io/veyron/veyron/services/mgmt/stats/impl"

	"veyron.io/veyron/veyron2/ipc"
	"veyron.io/veyron/veyron2/security"
)

// dispatcher holds the state of the debug dispatcher.
type dispatcher struct {
	logsDir string // The root of the logs directory.
	auth    security.Authorizer
}

func NewDispatcher(logsDir string, authorizer security.Authorizer) *dispatcher {
	return &dispatcher{logsDir, authorizer}
}

func (d *dispatcher) Lookup(suffix, method string) (ipc.Invoker, security.Authorizer, error) {
	if method == "Signature" {
		return NewSignatureInvoker(suffix), d.auth, nil
	}
	if len(suffix) == 0 {
		leaves := []string{"logs", "pprof", "stats"}
		return toplevelglob.New(d, leaves), d.auth, nil
	}
	parts := strings.SplitN(suffix, "/", 2)
	if len(parts) == 2 {
		suffix = parts[1]
	} else {
		suffix = ""
	}
	switch parts[0] {
	case "logs":
		if method == "Glob" {
			return logreaderimpl.NewLogDirectoryInvoker(d.logsDir, suffix), d.auth, nil
		}
		return logreaderimpl.NewLogFileInvoker(d.logsDir, suffix), d.auth, nil
	case "pprof":
		return pprofimpl.NewInvoker(), d.auth, nil
	case "stats":
		return statsimpl.NewStatsInvoker(suffix, 10*time.Second), d.auth, nil
	}
	return nil, d.auth, nil
}