forked from gliderlabs/logspout
/
routes.go
199 lines (181 loc) · 3.7 KB
/
routes.go
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package router
import (
"crypto/sha1"
"errors"
"fmt"
"io"
"log"
"net/url"
"os"
"strconv"
"strings"
"sync"
"time"
)
var Routes *RouteManager
func init() {
Routes = &RouteManager{routes: make(map[string]*Route)}
Jobs.Register(Routes, "routes")
}
type RouteManager struct {
sync.Mutex
persistor RouteStore
routes map[string]*Route
routing bool
}
func (rm *RouteManager) Load(persistor RouteStore) error {
routes, err := persistor.GetAll()
if err != nil {
return err
}
for _, route := range routes {
rm.Add(route)
}
rm.persistor = persistor
return nil
}
func (rm *RouteManager) Get(id string) (*Route, error) {
rm.Lock()
defer rm.Unlock()
route, ok := rm.routes[id]
if !ok {
return nil, os.ErrNotExist
}
return route, nil
}
func (rm *RouteManager) GetAll() ([]*Route, error) {
rm.Lock()
defer rm.Unlock()
routes := make([]*Route, 0)
for _, route := range rm.routes {
routes = append(routes, route)
}
return routes, nil
}
func (rm *RouteManager) Remove(id string) bool {
rm.Lock()
defer rm.Unlock()
route, ok := rm.routes[id]
if ok && route.closer != nil {
route.closer <- true
}
delete(rm.routes, id)
if rm.persistor != nil {
rm.persistor.Remove(id)
}
return ok
}
func (rm *RouteManager) AddFromUri(uri string) error {
expandedRoute := os.ExpandEnv(uri)
u, err := url.Parse(expandedRoute)
if err != nil {
return err
}
r := &Route{
Address: u.Host,
Adapter: u.Scheme,
Options: make(map[string]string),
}
if u.RawQuery != "" {
params, err := url.ParseQuery(u.RawQuery)
if err != nil {
return err
}
for key, _ := range params {
value := params.Get(key)
switch key {
case "filter.id":
r.FilterID = value
case "filter.name":
r.FilterName = value
case "filter.sources":
r.FilterSources = strings.Split(value, ",")
default:
r.Options[key] = value
}
}
}
return rm.Add(r)
}
func (rm *RouteManager) Add(route *Route) error {
rm.Lock()
defer rm.Unlock()
factory, found := AdapterFactories.Lookup(route.AdapterType())
if !found {
return errors.New("bad adapter: " + route.Adapter)
}
adapter, err := factory(route)
if err != nil {
return err
}
if route.ID == "" {
h := sha1.New()
io.WriteString(h, strconv.Itoa(int(time.Now().UnixNano())))
route.ID = fmt.Sprintf("%x", h.Sum(nil))[:12]
}
route.closer = make(chan bool)
route.adapter = adapter
rm.routes[route.ID] = route
if rm.persistor != nil {
if err := rm.persistor.Add(route); err != nil {
log.Println("persistor:", err)
}
}
if rm.routing {
go rm.route(route)
}
return nil
}
func (rm *RouteManager) route(route *Route) {
logstream := make(chan *Message)
defer route.Close()
rm.Route(route, logstream)
route.adapter.Stream(logstream)
}
func (rm *RouteManager) Route(route *Route, logstream chan *Message) {
for _, router := range LogRouters.All() {
go router.Route(route, logstream)
}
}
func (rm *RouteManager) RoutingFrom(containerID string) bool {
for _, router := range LogRouters.All() {
if router.RoutingFrom(containerID) {
return true
}
}
return false
}
func (rm *RouteManager) Run() error {
rm.Lock()
for _, route := range rm.routes {
go rm.route(route)
}
rm.routing = true
rm.Unlock()
select {}
}
func (rm *RouteManager) Name() string {
return ""
}
func (rm *RouteManager) Setup() error {
var uris string
if os.Getenv("ROUTE_URIS") != "" {
uris = os.Getenv("ROUTE_URIS")
}
if len(os.Args) > 1 {
uris = os.Args[1]
}
if uris != "" {
for _, uri := range strings.Split(uris, ",") {
err := rm.AddFromUri(uri)
if err != nil {
return err
}
}
}
persistPath := getopt("ROUTESPATH", "/mnt/routes")
if _, err := os.Stat(persistPath); err == nil {
return rm.Load(RouteFileStore(persistPath))
}
return nil
}