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table package is no more. Cleaned up unnecessary code, too.

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This commit is contained in:
Milos Gajdos 2019-07-25 23:19:05 +01:00
parent 4e27aac398
commit e22c4b4c07
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GPG Key ID: 8B31058CC55DFD4F
10 changed files with 143 additions and 244 deletions
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61
network/router/default.go
View File

@ -8,7 +8,6 @@ import (
"sync"
"time"
"github.com/micro/go-micro/network/router/table"
"github.com/micro/go-micro/registry"
)
@ -43,12 +42,12 @@ var (
// router implements default router
type router struct {
// embed the table
table.Table
*Table
opts Options
status Status
exit chan struct{}
errChan chan error
eventChan chan *table.Event
eventChan chan *Event
advertChan chan *Advert
advertWg *sync.WaitGroup
wg *sync.WaitGroup
@ -92,18 +91,18 @@ func (r *router) Options() Options {
}
// manageRoute applies action on a given route
func (r *router) manageRoute(route table.Route, action string) error {
func (r *router) manageRoute(route Route, action string) error {
switch action {
case "create":
if err := r.Create(route); err != nil && err != table.ErrDuplicateRoute {
if err := r.Create(route); err != nil && err != ErrDuplicateRoute {
return fmt.Errorf("failed adding route for service %s: %s", route.Service, err)
}
case "update":
if err := r.Update(route); err != nil && err != table.ErrDuplicateRoute {
if err := r.Update(route); err != nil && err != ErrDuplicateRoute {
return fmt.Errorf("failed updating route for service %s: %s", route.Service, err)
}
case "delete":
if err := r.Delete(route); err != nil && err != table.ErrRouteNotFound {
if err := r.Delete(route); err != nil && err != ErrRouteNotFound {
return fmt.Errorf("failed deleting route for service %s: %s", route.Service, err)
}
default:
@ -121,13 +120,13 @@ func (r *router) manageServiceRoutes(service *registry.Service, action string) e
// take route action on each service node
for _, node := range service.Nodes {
route := table.Route{
route := Route{
Service: service.Name,
Address: node.Address,
Gateway: "",
Network: r.opts.Network,
Link: table.DefaultLink,
Metric: table.DefaultLocalMetric,
Link: DefaultLink,
Metric: DefaultLocalMetric,
}
if err := r.manageRoute(route, action); err != nil {
@ -197,7 +196,7 @@ func (r *router) watchRegistry(w registry.Watcher) error {
// watchTable watches routing table entries and either adds or deletes locally registered service to/from network registry
// It returns error if the locally registered services either fails to be added/deleted to/from network registry.
func (r *router) watchTable(w table.Watcher) error {
func (r *router) watchTable(w Watcher) error {
// wait in the background for the router to stop
// when the router stops, stop the watcher and exit
r.wg.Add(1)
@ -212,7 +211,7 @@ func (r *router) watchTable(w table.Watcher) error {
for {
event, err := w.Next()
if err != nil {
if err != table.ErrWatcherStopped {
if err != ErrWatcherStopped {
watchErr = err
}
break
@ -234,7 +233,7 @@ func (r *router) watchTable(w table.Watcher) error {
// publishAdvert publishes router advert to advert channel
// NOTE: this might cease to be a dedicated method in the future
func (r *router) publishAdvert(advType AdvertType, events []*table.Event) {
func (r *router) publishAdvert(advType AdvertType, events []*Event) {
defer r.advertWg.Done()
a := &Advert{
@ -266,10 +265,10 @@ func (r *router) advertiseTable() error {
return fmt.Errorf("failed listing routes: %s", err)
}
// collect all the added routes before we attempt to add default gateway
events := make([]*table.Event, len(routes))
events := make([]*Event, len(routes))
for i, route := range routes {
event := &table.Event{
Type: table.Update,
event := &Event{
Type: Update,
Timestamp: time.Now(),
Route: route,
}
@ -279,7 +278,7 @@ func (r *router) advertiseTable() error {
// advertise all routes as Update events to subscribers
if len(events) > 0 {
r.advertWg.Add(1)
go r.publishAdvert(Update, events)
go r.publishAdvert(RouteUpdate, events)
}
case <-r.exit:
return nil
@ -289,7 +288,7 @@ func (r *router) advertiseTable() error {
// routeAdvert contains a list of route events to be advertised
type routeAdvert struct {
events []*table.Event
events []*Event
// lastUpdate records the time of the last advert update
lastUpdate time.Time
// penalty is current advert penalty
@ -326,7 +325,7 @@ func (r *router) advertiseEvents() error {
for {
select {
case <-ticker.C:
var events []*table.Event
var events []*Event
// collect all events which are not flapping
for key, advert := range advertMap {
// decay the event penalty
@ -352,7 +351,7 @@ func (r *router) advertiseEvents() error {
if !advert.isSuppressed {
for _, event := range advert.events {
e := new(table.Event)
e := new(Event)
*e = *event
events = append(events, e)
// delete the advert from the advertMap
@ -364,7 +363,7 @@ func (r *router) advertiseEvents() error {
// advertise all Update events to subscribers
if len(events) > 0 {
r.advertWg.Add(1)
go r.publishAdvert(Update, events)
go r.publishAdvert(RouteUpdate, events)
}
case e := <-r.eventChan:
// if event is nil, continue
@ -375,9 +374,9 @@ func (r *router) advertiseEvents() error {
// determine the event penalty
var penalty float64
switch e.Type {
case table.Update:
case Update:
penalty = UpdatePenalty
case table.Delete:
case Delete:
penalty = DeletePenalty
}
@ -386,7 +385,7 @@ func (r *router) advertiseEvents() error {
hash := e.Route.Hash()
advert, ok := advertMap[hash]
if !ok {
events := []*table.Event{e}
events := []*Event{e}
advert = &routeAdvert{
events: events,
penalty: penalty,
@ -462,12 +461,12 @@ func (r *router) run() {
// add default gateway into routing table
if r.opts.Gateway != "" {
// note, the only non-default value is the gateway
route := table.Route{
route := Route{
Service: "*",
Address: "*",
Gateway: r.opts.Gateway,
Network: "*",
Metric: table.DefaultLocalMetric,
Metric: DefaultLocalMetric,
}
if err := r.Create(route); err != nil {
r.status = Status{Code: Error, Error: fmt.Errorf("failed adding default gateway route: %s", err)}
@ -528,10 +527,10 @@ func (r *router) Advertise() (<-chan *Advert, error) {
return nil, fmt.Errorf("failed listing routes: %s", err)
}
// collect all the added routes before we attempt to add default gateway
events := make([]*table.Event, len(routes))
events := make([]*Event, len(routes))
for i, route := range routes {
event := &table.Event{
Type: table.Create,
event := &Event{
Type: Create,
Timestamp: time.Now(),
Route: route,
}
@ -540,7 +539,7 @@ func (r *router) Advertise() (<-chan *Advert, error) {
// create advertise and event channels
r.advertChan = make(chan *Advert)
r.eventChan = make(chan *table.Event)
r.eventChan = make(chan *Event)
// advertise your presence
r.advertWg.Add(1)
@ -580,7 +579,7 @@ func (r *router) Advertise() (<-chan *Advert, error) {
func (r *router) Process(a *Advert) error {
// NOTE: event sorting might not be necessary
// copy update events intp new slices
events := make([]*table.Event, len(a.Events))
events := make([]*Event, len(a.Events))
copy(events, a.Events)
// sort events by timestamp
sort.Slice(events, func(i, j int) bool {

9
network/router/options.go
View File

@ -2,7 +2,6 @@ package router
import (
"github.com/google/uuid"
"github.com/micro/go-micro/network/router/table"
"github.com/micro/go-micro/registry"
)
@ -26,7 +25,7 @@ type Options struct {
// Registry is the local registry
Registry registry.Registry
// Table is routing table
Table table.Table
Table *Table
}
// Id sets Router Id
@ -64,8 +63,8 @@ func Registry(r registry.Registry) Option {
}
}
// Table sets the routing table
func Table(t table.Table) Option {
// RoutingTable sets the routing table
func RoutingTable(t *Table) Option {
return func(o *Options) {
o.Table = t
}
@ -78,6 +77,6 @@ func DefaultOptions() Options {
Address: DefaultAddress,
Network: DefaultNetwork,
Registry: registry.DefaultRegistry,
Table: table.NewTable(),
Table: NewTable(),
}
}

36
network/router/table/query.go → network/router/query.go
View File

@ -1,26 +1,4 @@
package table
// LookupPolicy defines query policy
type LookupPolicy int
const (
// DiscardIfNone discards query when no route is found
DiscardIfNone LookupPolicy = iota
// ClosestMatch returns closest match to supplied query
ClosestMatch
)
// String returns human representation of LookupPolicy
func (lp LookupPolicy) String() string {
switch lp {
case DiscardIfNone:
return "DISCARD"
case ClosestMatch:
return "CLOSEST"
default:
return "UNKNOWN"
}
}
package router
// QueryOption sets routing table query options
type QueryOption func(*QueryOptions)
@ -33,8 +11,6 @@ type QueryOptions struct {
Gateway string
// Network is network address
Network string
// Policy is query lookup policy
Policy LookupPolicy
}
// QueryService sets destination address
@ -58,14 +34,6 @@ func QueryNetwork(n string) QueryOption {
}
}
// QueryPolicy sets query policy
// NOTE: this might be renamed to filter or some such
func QueryPolicy(p LookupPolicy) QueryOption {
return func(o *QueryOptions) {
o.Policy = p
}
}
// Query is routing table query
type Query interface {
// Options returns query options
@ -80,12 +48,10 @@ type query struct {
// NewQuery creates new query and returns it
func NewQuery(opts ...QueryOption) Query {
// default options
// NOTE: by default we use DefaultNetworkMetric
qopts := QueryOptions{
Service: "*",
Gateway: "*",
Network: "*",
Policy: DiscardIfNone,
}
for _, o := range opts {

2
network/router/table/route.go → network/router/route.go
View File

@ -1,4 +1,4 @@
package table
package router
import (
"hash/fnv"

24
network/router/route_test.go Normal file
View File

@ -0,0 +1,24 @@
package router
import "testing"
func TestHash(t *testing.T) {
route1 := Route{
Service: "dest.svc",
Gateway: "dest.gw",
Network: "dest.network",
Link: "det.link",
Metric: 10,
}
// make a copy
route2 := route1
route1Hash := route1.Hash()
route2Hash := route2.Hash()
// we should get the same hash
if route1Hash != route2Hash {
t.Errorf("identical routes result in different hashes")
}
}

34
network/router/router.go
View File

@ -3,8 +3,6 @@ package router
import (
"time"
"github.com/micro/go-micro/network/router/table"
)
var (
@ -14,8 +12,6 @@ var (
// Router is an interface for a routing control plane
type Router interface {
// Router provides a routing table
table.Table
// Init initializes the router with options
Init(...Option) error
// Options returns the router options
@ -24,6 +20,18 @@ type Router interface {
Advertise() (<-chan *Advert, error)
// Process processes incoming adverts
Process(*Advert) error
// Create new route in the routing table
Create(Route) error
// Delete deletes existing route from the routing table
Delete(Route) error
// Update updates route in the routing table
Update(Route) error
// List returns the list of all routes in the table
List() ([]Route, error)
// Lookup looks up routes in the routing table and returns them
Lookup(Query) ([]Route, error)
// Watch returns a watcher which allows to track updates to the routing table
Watch(opts ...WatchOption) (Watcher, error)
// Status returns router status
Status() Status
// Stop stops the router
@ -63,10 +71,22 @@ type AdvertType int
const (
// Announce is advertised when the router announces itself
Announce AdvertType = iota
// Update advertises route updates
Update
// RouteUpdate advertises route updates
RouteUpdate
)
// String returns human readable advertisement type
func (t AdvertType) String() string {
switch t {
case Announce:
return "announce"
case RouteUpdate:
return "update"
default:
return "unknown"
}
}
// Advert contains a list of events advertised by the router to the network
type Advert struct {
// Id is the router Id
@ -78,7 +98,7 @@ type Advert struct {
// TTL is Advert TTL
TTL time.Duration
// Events is a list of routing table events to advertise
Events []*table.Event
Events []*Event
}
// NewRouter creates new Router and returns it

128
network/router/table/default.go → network/router/table.go
View File

@ -1,59 +1,39 @@
package table
package router
import (
"errors"
"sync"
"time"
"github.com/google/uuid"
)
// Options specify routing table options
// TODO: table options TBD in the future
type Options struct{}
var (
// ErrRouteNotFound is returned when no route was found in the routing table
ErrRouteNotFound = errors.New("route not found")
// ErrDuplicateRoute is returned when the route already exists
ErrDuplicateRoute = errors.New("duplicate route")
)
// table is an in memory routing table
type table struct {
// opts are table options
opts Options
// m stores routing table map
m map[string]map[uint64]Route
// w is a list of table watchers
w map[string]*tableWatcher
// Table is an in memory routing table
type Table struct {
// routes stores service routes
routes map[string]map[uint64]Route
// watchers stores table watchers
watchers map[string]*tableWatcher
sync.RWMutex
}
// newTable creates a new routing table and returns it
func newTable(opts ...Option) Table {
// default options
var options Options
// apply requested options
for _, o := range opts {
o(&options)
// NewTable creates a new routing table and returns it
func NewTable(opts ...Option) *Table {
return &Table{
routes: make(map[string]map[uint64]Route),
watchers: make(map[string]*tableWatcher),
}
return &table{
opts: options,
m: make(map[string]map[uint64]Route),
w: make(map[string]*tableWatcher),
}
}
// Init initializes routing table with options
func (t *table) Init(opts ...Option) error {
for _, o := range opts {
o(&t.opts)
}
return nil
}
// Options returns routing table options
func (t *table) Options() Options {
return t.opts
}
// Create creates new route in the routing table
func (t *table) Create(r Route) error {
func (t *Table) Create(r Route) error {
service := r.Service
sum := r.Hash()
@ -61,16 +41,16 @@ func (t *table) Create(r Route) error {
defer t.Unlock()
// check if there are any routes in the table for the route destination
if _, ok := t.m[service]; !ok {
t.m[service] = make(map[uint64]Route)
t.m[service][sum] = r
if _, ok := t.routes[service]; !ok {
t.routes[service] = make(map[uint64]Route)
t.routes[service][sum] = r
go t.sendEvent(&Event{Type: Create, Timestamp: time.Now(), Route: r})
return nil
}
// add new route to the table for the route destination
if _, ok := t.m[service][sum]; !ok {
t.m[service][sum] = r
if _, ok := t.routes[service][sum]; !ok {
t.routes[service][sum] = r
go t.sendEvent(&Event{Type: Create, Timestamp: time.Now(), Route: r})
return nil
}
@ -79,25 +59,25 @@ func (t *table) Create(r Route) error {
}
// Delete deletes the route from the routing table
func (t *table) Delete(r Route) error {
func (t *Table) Delete(r Route) error {
service := r.Service
sum := r.Hash()
t.Lock()
defer t.Unlock()
if _, ok := t.m[service]; !ok {
if _, ok := t.routes[service]; !ok {
return ErrRouteNotFound
}
delete(t.m[service], sum)
delete(t.routes[service], sum)
go t.sendEvent(&Event{Type: Delete, Timestamp: time.Now(), Route: r})
return nil
}
// Update updates routing table with the new route
func (t *table) Update(r Route) error {
func (t *Table) Update(r Route) error {
service := r.Service
sum := r.Hash()
@ -105,26 +85,26 @@ func (t *table) Update(r Route) error {
defer t.Unlock()
// check if the route destination has any routes in the table
if _, ok := t.m[service]; !ok {
t.m[service] = make(map[uint64]Route)
t.m[service][sum] = r
if _, ok := t.routes[service]; !ok {
t.routes[service] = make(map[uint64]Route)
t.routes[service][sum] = r
go t.sendEvent(&Event{Type: Create, Timestamp: time.Now(), Route: r})
return nil
}
t.m[service][sum] = r
t.routes[service][sum] = r
go t.sendEvent(&Event{Type: Update, Timestamp: time.Now(), Route: r})
return nil
}
// List returns a list of all routes in the table
func (t *table) List() ([]Route, error) {
func (t *Table) List() ([]Route, error) {
t.RLock()
defer t.RUnlock()
var routes []Route
for _, rmap := range t.m {
for _, rmap := range t.routes {
for _, route := range rmap {
routes = append(routes, route)
}
@ -155,21 +135,20 @@ func findRoutes(routes map[uint64]Route, network, router string) []Route {
}
// Lookup queries routing table and returns all routes that match the lookup query
func (t *table) Lookup(q Query) ([]Route, error) {
func (t *Table) Lookup(q Query) ([]Route, error) {
t.RLock()
defer t.RUnlock()
if q.Options().Service != "*" {
// no routes found for the destination and query policy is not a DiscardIfNone
if _, ok := t.m[q.Options().Service]; !ok && q.Options().Policy != DiscardIfNone {
if _, ok := t.routes[q.Options().Service]; !ok {
return nil, ErrRouteNotFound
}
return findRoutes(t.m[q.Options().Service], q.Options().Network, q.Options().Gateway), nil
return findRoutes(t.routes[q.Options().Service], q.Options().Network, q.Options().Gateway), nil
}
var results []Route
// search through all destinations
for _, routes := range t.m {
for _, routes := range t.routes {
results = append(results, findRoutes(routes, q.Options().Network, q.Options().Gateway)...)
}
@ -177,7 +156,7 @@ func (t *table) Lookup(q Query) ([]Route, error) {
}
// Watch returns routing table entry watcher
func (t *table) Watch(opts ...WatchOption) (Watcher, error) {
func (t *Table) Watch(opts ...WatchOption) (Watcher, error) {
// by default watch everything
wopts := WatchOptions{
Service: "*",
@ -187,25 +166,25 @@ func (t *table) Watch(opts ...WatchOption) (Watcher, error) {
o(&wopts)
}
watcher := &tableWatcher{
w := &tableWatcher{
opts: wopts,
resChan: make(chan *Event, 10),
done: make(chan struct{}),
}
t.Lock()
t.w[uuid.New().String()] = watcher
t.watchers[uuid.New().String()] = w
t.Unlock()
return watcher, nil
return w, nil
}
// sendEvent sends rules to all subscribe watchers
func (t *table) sendEvent(r *Event) {
func (t *Table) sendEvent(r *Event) {
t.RLock()
defer t.RUnlock()
for _, w := range t.w {
for _, w := range t.watchers {
select {
case w.resChan <- r:
case <-w.done:
@ -213,20 +192,7 @@ func (t *table) sendEvent(r *Event) {
}
}
// Size returns the size of the routing table
func (t *table) Size() int {
t.RLock()
defer t.RUnlock()
size := 0
for dest := range t.m {
size += len(t.m[dest])
}
return size
}
// String returns debug information
func (t *table) String() string {
return "default"
func (t *Table) String() string {
return "table"
}

38
network/router/table/table.go
View File

@ -1,38 +0,0 @@
package table
import (
"errors"
)
var (
// ErrRouteNotFound is returned when no route was found in the routing table
ErrRouteNotFound = errors.New("route not found")
// ErrDuplicateRoute is returned when the route already exists
ErrDuplicateRoute = errors.New("duplicate route")
)
// Table defines routing table interface
type Table interface {
// Create new route in the routing table
Create(Route) error
// Delete deletes existing route from the routing table
Delete(Route) error
// Update updates route in the routing table
Update(Route) error
// List returns the list of all routes in the table
List() ([]Route, error)
// Lookup looks up routes in the routing table and returns them
Lookup(Query) ([]Route, error)
// Watch returns a watcher which allows to track updates to the routing table
Watch(opts ...WatchOption) (Watcher, error)
// Size returns the size of the routing table
Size() int
}
// Option used by the routing table
type Option func(*Options)
// NewTable creates new routing table and returns it
func NewTable(opts ...Option) Table {
return newTable(opts...)
}

42
network/router/table/default_test.go → network/router/table_test.go
View File

@ -1,8 +1,8 @@
package table
package router
import "testing"
func testSetup() (Table, Route) {
func testSetup() (*Table, Route) {
table := NewTable()
route := Route{
@ -18,12 +18,10 @@ func testSetup() (Table, Route) {
func TestCreate(t *testing.T) {
table, route := testSetup()
testTableSize := table.Size()
if err := table.Create(route); err != nil {
t.Errorf("error adding route: %s", err)
}
testTableSize++
// adds new route for the original destination
route.Gateway = "dest.gw2"
@ -31,11 +29,6 @@ func TestCreate(t *testing.T) {
if err := table.Create(route); err != nil {
t.Errorf("error adding route: %s", err)
}
testTableSize++
if table.Size() != testTableSize {
t.Errorf("invalid number of routes. Expected: %d, found: %d", testTableSize, table.Size())
}
// adding the same route under Insert policy must error
if err := table.Create(route); err != ErrDuplicateRoute {
@ -45,12 +38,10 @@ func TestCreate(t *testing.T) {
func TestDelete(t *testing.T) {
table, route := testSetup()
testTableSize := table.Size()
if err := table.Create(route); err != nil {
t.Errorf("error adding route: %s", err)
}
testTableSize++
// should fail to delete non-existant route
prevSvc := route.Service
@ -66,21 +57,14 @@ func TestDelete(t *testing.T) {
if err := table.Delete(route); err != nil {
t.Errorf("error deleting route: %s", err)
}
testTableSize--
if table.Size() != testTableSize {
t.Errorf("invalid number of routes. Expected: %d, found: %d", testTableSize, table.Size())
}
}
func TestUpdate(t *testing.T) {
table, route := testSetup()
testTableSize := table.Size()
if err := table.Create(route); err != nil {
t.Errorf("error adding route: %s", err)
}
testTableSize++
// change the metric of the original route
route.Metric = 200
@ -89,22 +73,12 @@ func TestUpdate(t *testing.T) {
t.Errorf("error updating route: %s", err)
}
// the size of the table should not change as we're only updating the metric of an existing route
if table.Size() != testTableSize {
t.Errorf("invalid number of routes. Expected: %d, found: %d", testTableSize, table.Size())
}
// this should add a new route
route.Service = "rand.dest"
if err := table.Update(route); err != nil {
t.Errorf("error updating route: %s", err)
}
testTableSize++
if table.Size() != testTableSize {
t.Errorf("invalid number of routes. Expected: %d, found: %d", testTableSize, table.Size())
}
}
func TestList(t *testing.T) {
@ -127,10 +101,6 @@ func TestList(t *testing.T) {
if len(routes) != len(svc) {
t.Errorf("incorrect number of routes listed. Expected: %d, found: %d", len(svc), len(routes))
}
if len(routes) != table.Size() {
t.Errorf("mismatch number of routes and table size. Expected: %d, found: %d", len(routes), table.Size())
}
}
func TestLookup(t *testing.T) {
@ -157,10 +127,6 @@ func TestLookup(t *testing.T) {
t.Errorf("error looking up routes: %s", err)
}
if len(routes) != table.Size() {
t.Errorf("incorrect number of routes returned. Expected: %d, found: %d", table.Size(), len(routes))
}
// query particular net
query = NewQuery(QueryNetwork("net1"))
@ -218,8 +184,8 @@ func TestLookup(t *testing.T) {
query = NewQuery(QueryService("foobar"))
routes, err = table.Lookup(query)
if err != nil {
t.Errorf("error looking up routes: %s", err)
if err != ErrRouteNotFound {
t.Errorf("error looking up routes. Expected: %s, found: %s", ErrRouteNotFound, err)
}
if len(routes) != 0 {

13
network/router/table/watcher.go → network/router/watcher.go
View File

@ -1,4 +1,4 @@
package table
package router
import (
"errors"
@ -22,11 +22,9 @@ const (
Update
)
// String implements fmt.Stringer
// NOTE: we need this as this makes converting the numeric codes
// into miro style string actions very simple
func (et EventType) String() string {
switch et {
// String returns human readable event type
func (t EventType) String() string {
switch t {
case Create:
return "create"
case Delete:
@ -83,8 +81,7 @@ type tableWatcher struct {
}
// Next returns the next noticed action taken on table
// TODO: this needs to be thought through properly;
// right now we only allow to watch service
// TODO: think this through properly; right now we only watch service
func (w *tableWatcher) Next() (*Event, error) {
for {
select {