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rpc_storage_handler.go
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/
rpc_storage_handler.go
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package main
import (
"crypto/tls"
"errors"
"io"
"net"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/garyburd/redigo/redis"
"github.com/lonelycode/gorpc"
cache "github.com/pmylund/go-cache"
"github.com/satori/go.uuid"
"github.com/TykTechnologies/tyk/config"
"github.com/TykTechnologies/tyk/storage"
"github.com/Sirupsen/logrus"
)
type InboundData struct {
KeyName string
Value string
SessionState string
Timeout int64
Per int64
Expire int64
}
type DefRequest struct {
OrgId string
Tags []string
}
type KeysValuesPair struct {
Keys []string
Values []string
}
type GroupLoginRequest struct {
UserKey string
GroupID string
}
type GroupKeySpaceRequest struct {
OrgID string
GroupID string
}
var (
// rpcLoadCount is a counter to check if this is a cold boot
rpcLoadCount int
rpcEmergencyMode bool
rpcEmergencyModeLoaded bool
GlobalRPCCallTimeout time.Duration
GlobalRPCPingTimeout time.Duration
)
// RPCStorageHandler is a storage manager that uses the redis database.
type RPCStorageHandler struct {
KeyPrefix string
HashKeys bool
UserKey string
Address string
killChan chan int
Killed bool
Connected bool
ID string
SuppressRegister bool
}
func (r *RPCStorageHandler) Register() {
r.ID = uuid.NewV4().String()
r.killChan = make(chan int)
log.Debug("RPC Client registered")
}
func (r *RPCStorageHandler) checkDisconnect() {
res := <-r.killChan
log.Info("RPC Client disconnecting: ", res)
r.Killed = true
r.Disconnect()
}
func (r *RPCStorageHandler) ReConnect() {
// no-op, let the gorpc client handle it.
}
var RPCCLientSingleton *gorpc.Client
var RPCCLientSingletonMu sync.Mutex
var RPCFuncClientSingleton *gorpc.DispatcherClient
var RPCGlobalCache = cache.New(30*time.Second, 15*time.Second)
var RPCClientIsConnected bool
const (
rpcCLientSingletonCall = "gorpcClientCall"
rpcFuncClientSingletonCall = "gorpcDispatcherClientCall"
)
func emitRPCErrorEvent(jobName string, funcName string, err error) {
job := instrument.NewJob(jobName)
if emitErr := job.EventErr(funcName, err); emitErr != nil {
log.WithError(emitErr).WithFields(logrus.Fields{
"jobName": jobName,
"funcName": funcName,
})
}
}
func emitRPCErrorEventKv(jobName string, funcName string, err error, kv map[string]string) {
job := instrument.NewJob(jobName)
if emitErr := job.EventErrKv(funcName, err, kv); emitErr != nil {
log.WithError(emitErr).WithFields(logrus.Fields{
"jobName": jobName,
"funcName": funcName,
"kv": kv,
})
}
}
var rpcConnectMu sync.Mutex
// Connect will establish a connection to the DB
func (r *RPCStorageHandler) Connect() bool {
rpcConnectMu.Lock()
defer rpcConnectMu.Unlock()
if RPCClientIsConnected {
log.Debug("Using RPC singleton for connection")
return true
}
if RPCCLientSingleton != nil {
return rpcEmergencyMode != true
}
// RPC Client is unset
// Set up the cache
log.Info("Setting new RPC connection!")
connID := uuid.NewV4().String()
// Length should fit into 1 byte. Protection if we decide change uuid in future.
if len(connID) > 255 {
panic("connID is too long")
}
if slaveOptions := config.Global().SlaveOptions; slaveOptions.UseSSL {
clientCfg := &tls.Config{
InsecureSkipVerify: slaveOptions.SSLInsecureSkipVerify,
}
RPCCLientSingleton = gorpc.NewTLSClient(r.Address, clientCfg)
} else {
RPCCLientSingleton = gorpc.NewTCPClient(r.Address)
}
if log.Level != logrus.DebugLevel {
RPCCLientSingleton.LogError = gorpc.NilErrorLogger
}
RPCCLientSingleton.OnConnect = r.OnConnectFunc
RPCCLientSingleton.Conns = config.Global().SlaveOptions.RPCPoolSize
if RPCCLientSingleton.Conns == 0 {
RPCCLientSingleton.Conns = 20
}
RPCCLientSingleton.Dial = func(addr string) (conn io.ReadWriteCloser, err error) {
dialer := &net.Dialer{
Timeout: 10 * time.Second,
KeepAlive: 30 * time.Second,
}
useSSL := config.Global().SlaveOptions.UseSSL
if useSSL {
cfg := &tls.Config{
InsecureSkipVerify: config.Global().SlaveOptions.SSLInsecureSkipVerify,
}
conn, err = tls.DialWithDialer(dialer, "tcp", addr, cfg)
} else {
conn, err = dialer.Dial("tcp", addr)
}
if err != nil {
emitRPCErrorEventKv(
rpcCLientSingletonCall,
"dial",
err,
map[string]string{
"addr": addr,
"useSSL": strconv.FormatBool(useSSL),
},
)
return
}
conn.Write([]byte("proto2"))
conn.Write([]byte{byte(len(connID))})
conn.Write([]byte(connID))
return conn, nil
}
RPCCLientSingleton.Start()
d := getDispatcher()
if RPCFuncClientSingleton == nil {
RPCFuncClientSingleton = d.NewFuncClient(RPCCLientSingleton)
}
if !r.Login() {
return false
}
if !r.SuppressRegister {
r.Register()
go r.checkDisconnect()
}
return true
}
func (r *RPCStorageHandler) OnConnectFunc(remoteAddr string, rwc io.ReadWriteCloser) (io.ReadWriteCloser, error) {
RPCCLientSingletonMu.Lock()
defer RPCCLientSingletonMu.Unlock()
RPCClientIsConnected = true
return rwc, nil
}
func (r *RPCStorageHandler) Disconnect() bool {
RPCClientIsConnected = false
return true
}
func (r *RPCStorageHandler) hashKey(in string) string {
if !r.HashKeys {
// Not hashing? Return the raw key
return in
}
return storage.HashStr(in)
}
func (r *RPCStorageHandler) fixKey(keyName string) string {
setKeyName := r.KeyPrefix + r.hashKey(keyName)
log.Debug("Input key was: ", setKeyName)
return setKeyName
}
func (r *RPCStorageHandler) cleanKey(keyName string) string {
setKeyName := strings.Replace(keyName, r.KeyPrefix, "", 1)
return setKeyName
}
var rpcLoginMu sync.Mutex
var reLoginRunning uint32
func (r *RPCStorageHandler) ReAttemptLogin(err error) bool {
if atomic.LoadUint32(&reLoginRunning) == 1 {
return false
}
atomic.StoreUint32(&reLoginRunning, 1)
rpcLoginMu.Lock()
if rpcLoadCount == 0 && !rpcEmergencyModeLoaded {
log.Warning("[RPC Store] --> Detected cold start, attempting to load from cache")
log.Warning("[RPC Store] ----> Found APIs... beginning emergency load")
rpcEmergencyModeLoaded = true
go doReload()
}
rpcLoginMu.Unlock()
time.Sleep(time.Second * 3)
atomic.StoreUint32(&reLoginRunning, 0)
if strings.Contains(err.Error(), "Cannot obtain response during timeout") {
r.ReConnect()
return false
}
log.Warning("[RPC Store] Login failed, waiting 3s to re-attempt")
return r.Login()
}
func (r *RPCStorageHandler) GroupLogin() bool {
groupLoginData := GroupLoginRequest{
UserKey: r.UserKey,
GroupID: config.Global().SlaveOptions.GroupID,
}
ok, err := RPCFuncClientSingleton.CallTimeout("LoginWithGroup", groupLoginData, GlobalRPCCallTimeout)
if err != nil {
log.Error("RPC Login failed: ", err)
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"LoginWithGroup",
err,
map[string]string{
"GroupID": groupLoginData.GroupID,
},
)
rpcEmergencyMode = true
go r.ReAttemptLogin(err)
return false
}
if ok == false {
log.Error("RPC Login incorrect")
rpcEmergencyMode = true
go r.ReAttemptLogin(errors.New("Login incorrect"))
return false
}
log.Debug("[RPC Store] Group Login complete")
rpcLoadCount++
// Recovery
if rpcEmergencyMode {
rpcEmergencyMode = false
rpcEmergencyModeLoaded = false
reloadURLStructure(nil)
}
return true
}
func (r *RPCStorageHandler) Login() bool {
log.Debug("[RPC Store] Login initiated")
if len(r.UserKey) == 0 {
log.Fatal("No API Key set!")
}
// If we have a group ID, lets login as a group
if config.Global().SlaveOptions.GroupID != "" {
return r.GroupLogin()
}
ok, err := RPCFuncClientSingleton.CallTimeout("Login", r.UserKey, GlobalRPCCallTimeout)
if err != nil {
log.Error("RPC Login failed: ", err)
emitRPCErrorEvent(rpcFuncClientSingletonCall, "Login", err)
rpcEmergencyMode = true
go r.ReAttemptLogin(err)
return false
}
if ok == false {
log.Error("RPC Login incorrect")
rpcEmergencyMode = true
go r.ReAttemptLogin(errors.New("Login incorrect"))
return false
}
log.Debug("[RPC Store] Login complete")
rpcLoadCount++
if rpcEmergencyMode {
rpcEmergencyMode = false
rpcEmergencyModeLoaded = false
reloadURLStructure(nil)
}
return true
}
// GetKey will retrieve a key from the database
func (r *RPCStorageHandler) GetKey(keyName string) (string, error) {
start := time.Now() // get current time
log.Debug("[STORE] Getting WAS: ", keyName)
log.Debug("[STORE] Getting: ", r.fixKey(keyName))
value, err := r.GetRawKey(r.fixKey(keyName))
elapsed := time.Since(start)
log.Debug("GetKey took ", elapsed)
return value, err
}
func (r *RPCStorageHandler) GetRawKey(keyName string) (string, error) {
// Check the cache first
if config.Global().SlaveOptions.EnableRPCCache {
log.Debug("Using cache for: ", keyName)
cachedVal, found := RPCGlobalCache.Get(keyName)
log.Debug("--> Found? ", found)
if found {
return cachedVal.(string), nil
}
}
value, err := RPCFuncClientSingleton.CallTimeout("GetKey", keyName, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"GetKey",
err,
map[string]string{
"keyName": keyName,
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.GetRawKey(keyName)
}
}
log.Debug("Error trying to get value:", err)
return "", storage.ErrKeyNotFound
}
if config.Global().SlaveOptions.EnableRPCCache {
// Cache key
RPCGlobalCache.Set(keyName, value, cache.DefaultExpiration)
}
//return hash key without prefix so it doesnt get double prefixed in redis
return value.(string), nil
}
func (r *RPCStorageHandler) GetExp(keyName string) (int64, error) {
log.Debug("GetExp called")
value, err := RPCFuncClientSingleton.CallTimeout("GetExp", r.fixKey(keyName), GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"GetExp",
err,
map[string]string{
"keyName": keyName,
"fixedKeyName": r.fixKey(keyName),
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.GetExp(keyName)
}
}
log.Error("Error trying to get TTL: ", err)
return 0, storage.ErrKeyNotFound
}
return value.(int64), nil
}
func (r *RPCStorageHandler) SetExp(keyName string, timeout int64) error {
log.Error("RPCStorageHandler.SetExp - Not Implemented")
return nil
}
// SetKey will create (or update) a key value in the store
func (r *RPCStorageHandler) SetKey(keyName, session string, timeout int64) error {
start := time.Now() // get current time
ibd := InboundData{
KeyName: r.fixKey(keyName),
SessionState: session,
Timeout: timeout,
}
_, err := RPCFuncClientSingleton.CallTimeout("SetKey", ibd, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"SetKey",
err,
map[string]string{
"keyName": keyName,
"fixedKeyName": ibd.KeyName,
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.SetKey(keyName, session, timeout)
}
}
log.Debug("Error trying to set value:", err)
return err
}
elapsed := time.Since(start)
log.Debug("SetKey took ", elapsed)
return nil
}
func (r *RPCStorageHandler) SetRawKey(keyName, session string, timeout int64) error {
return nil
}
// Decrement will decrement a key in redis
func (r *RPCStorageHandler) Decrement(keyName string) {
log.Warning("Decrement called")
_, err := RPCFuncClientSingleton.CallTimeout("Decrement", keyName, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"Decrement",
err,
map[string]string{
"keyName": keyName,
},
)
}
if r.IsAccessError(err) {
if r.Login() {
r.Decrement(keyName)
return
}
}
}
// IncrementWithExpire will increment a key in redis
func (r *RPCStorageHandler) IncrememntWithExpire(keyName string, expire int64) int64 {
ibd := InboundData{
KeyName: keyName,
Expire: expire,
}
val, err := RPCFuncClientSingleton.CallTimeout("IncrememntWithExpire", ibd, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"IncrememntWithExpire",
err,
map[string]string{
"keyName": keyName,
},
)
}
if r.IsAccessError(err) {
if r.Login() {
return r.IncrememntWithExpire(keyName, expire)
}
}
if val == nil {
log.Warning("RPC increment returned nil value, returning 0")
return 0
}
return val.(int64)
}
// GetKeys will return all keys according to the filter (filter is a prefix - e.g. tyk.keys.*)
func (r *RPCStorageHandler) GetKeys(filter string) []string {
log.Error("RPCStorageHandler.GetKeys - Not Implemented")
return nil
}
// GetKeysAndValuesWithFilter will return all keys and their values with a filter
func (r *RPCStorageHandler) GetKeysAndValuesWithFilter(filter string) map[string]string {
searchStr := r.KeyPrefix + r.hashKey(filter) + "*"
log.Debug("[STORE] Getting list by: ", searchStr)
kvPair, err := RPCFuncClientSingleton.CallTimeout("GetKeysAndValuesWithFilter", searchStr, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"GetKeysAndValuesWithFilter",
err,
map[string]string{
"searchStr": searchStr,
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.GetKeysAndValuesWithFilter(filter)
}
}
return nil
}
returnValues := make(map[string]string)
for i, v := range kvPair.(*KeysValuesPair).Keys {
returnValues[r.cleanKey(v)] = kvPair.(*KeysValuesPair).Values[i]
}
return returnValues
}
// GetKeysAndValues will return all keys and their values - not to be used lightly
func (r *RPCStorageHandler) GetKeysAndValues() map[string]string {
searchStr := r.KeyPrefix + "*"
kvPair, err := RPCFuncClientSingleton.CallTimeout("GetKeysAndValues", searchStr, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEvent(rpcFuncClientSingletonCall, "GetKeysAndValues", err)
if r.IsAccessError(err) {
if r.Login() {
return r.GetKeysAndValues()
}
}
return nil
}
returnValues := make(map[string]string)
for i, v := range kvPair.(*KeysValuesPair).Keys {
returnValues[r.cleanKey(v)] = kvPair.(*KeysValuesPair).Values[i]
}
return returnValues
}
// DeleteKey will remove a key from the database
func (r *RPCStorageHandler) DeleteKey(keyName string) bool {
log.Debug("DEL Key was: ", keyName)
log.Debug("DEL Key became: ", r.fixKey(keyName))
ok, err := RPCFuncClientSingleton.CallTimeout("DeleteKey", r.fixKey(keyName), GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"DeleteKey",
err,
map[string]string{
"keyName": keyName,
"fixedKeyName": r.fixKey(keyName),
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.DeleteKey(keyName)
}
}
}
return ok == true
}
// DeleteKey will remove a key from the database without prefixing, assumes user knows what they are doing
func (r *RPCStorageHandler) DeleteRawKey(keyName string) bool {
ok, err := RPCFuncClientSingleton.CallTimeout("DeleteRawKey", keyName, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"DeleteRawKey",
err,
map[string]string{
"keyName": keyName,
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.DeleteRawKey(keyName)
}
}
}
return ok == true
}
// DeleteKeys will remove a group of keys in bulk
func (r *RPCStorageHandler) DeleteKeys(keys []string) bool {
if len(keys) > 0 {
asInterface := make([]string, len(keys))
for i, v := range keys {
asInterface[i] = r.fixKey(v)
}
log.Debug("Deleting: ", asInterface)
ok, err := RPCFuncClientSingleton.CallTimeout("DeleteKeys", asInterface, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"DeleteKeys",
err,
map[string]string{
"keys": strings.Join(keys, ","),
"asInterface": strings.Join(asInterface, ","),
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.DeleteKeys(keys)
}
}
}
return ok == true
}
log.Debug("RPCStorageHandler called DEL - Nothing to delete")
return true
}
// StartPubSubHandler will listen for a signal and run the callback with the message
func (r *RPCStorageHandler) StartPubSubHandler(channel string, callback func(redis.Message)) error {
log.Warning("RPCStorageHandler.StartPubSubHandler - NO PUBSUB DEFINED")
return nil
}
func (r *RPCStorageHandler) Publish(channel, message string) error {
log.Warning("RPCStorageHandler.Publish - NO PUBSUB DEFINED")
return nil
}
func (r *RPCStorageHandler) GetAndDeleteSet(keyName string) []interface{} {
log.Error("RPCStorageHandler.GetAndDeleteSet - Not implemented, please disable your purger")
return nil
}
func (r *RPCStorageHandler) AppendToSet(keyName, value string) {
ibd := InboundData{
KeyName: keyName,
Value: value,
}
_, err := RPCFuncClientSingleton.CallTimeout("AppendToSet", ibd, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"AppendToSet",
err,
map[string]string{
"keyName": keyName,
},
)
}
if r.IsAccessError(err) {
if r.Login() {
r.AppendToSet(keyName, value)
}
}
}
func (r *RPCStorageHandler) AppendToSetPipelined(key string, values []string) {
// just falls back to AppendToSet
// TODO: introduce new RPC method for pipelined operation
for _, val := range values {
r.AppendToSet(key, val)
}
}
// SetScrollingWindow is used in the rate limiter to handle rate limits fairly.
func (r *RPCStorageHandler) SetRollingWindow(keyName string, per int64, val string, pipeline bool) (int, []interface{}) {
start := time.Now() // get current time
ibd := InboundData{
KeyName: keyName,
Per: per,
Expire: -1,
}
intVal, err := RPCFuncClientSingleton.CallTimeout("SetRollingWindow", ibd, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"SetRollingWindow",
err,
map[string]string{
"keyName": keyName,
"per": strconv.Itoa(int(per)),
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.SetRollingWindow(keyName, per, val, false)
}
}
}
elapsed := time.Since(start)
log.Debug("SetRollingWindow took ", elapsed)
if intVal == nil {
log.Warning("RPC Handler: SetRollingWindow() returned nil, returning 0")
return 0, nil
}
return intVal.(int), nil
}
func (r *RPCStorageHandler) GetRollingWindow(keyName string, per int64, pipeline bool) (int, []interface{}) {
log.Warning("Not Implemented!")
return 0, nil
}
func (r RPCStorageHandler) GetSet(keyName string) (map[string]string, error) {
log.Error("RPCStorageHandler.GetSet - Not implemented")
return nil, nil
}
func (r RPCStorageHandler) AddToSet(keyName, value string) {
log.Error("RPCStorageHandler.AddToSet - Not implemented")
}
func (r RPCStorageHandler) RemoveFromSet(keyName, value string) {
log.Error("RPCStorageHandler.RemoveFromSet - Not implemented")
}
func (r RPCStorageHandler) IsAccessError(err error) bool {
if err != nil {
return err.Error() == "Access Denied"
}
return false
}
// GetAPIDefinitions will pull API definitions from the RPC server
func (r *RPCStorageHandler) GetApiDefinitions(orgId string, tags []string) string {
dr := DefRequest{
OrgId: orgId,
Tags: tags,
}
defString, err := RPCFuncClientSingleton.CallTimeout("GetApiDefinitions", dr, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"GetApiDefinitions",
err,
map[string]string{
"orgId": orgId,
"tags": strings.Join(tags, ","),
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.GetApiDefinitions(orgId, tags)
}
}
return ""
}
log.Debug("API Definitions retrieved")
if defString == nil {
log.Warning("RPC Handler: GetApiDefinitions() returned nil, returning empty string")
return ""
}
return defString.(string)
}
// GetPolicies will pull Policies from the RPC server
func (r *RPCStorageHandler) GetPolicies(orgId string) string {
defString, err := RPCFuncClientSingleton.CallTimeout("GetPolicies", orgId, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"GetPolicies",
err,
map[string]string{
"orgId": orgId,
},
)
if r.IsAccessError(err) {
if r.Login() {
return r.GetPolicies(orgId)
}
}
return ""
}
if defString != nil {
return defString.(string)
}
return ""
}
// CheckForReload will start a long poll
func (r *RPCStorageHandler) CheckForReload(orgId string) {
log.Debug("[RPC STORE] Check Reload called...")
reload, err := RPCFuncClientSingleton.CallTimeout("CheckReload", orgId, GlobalRPCPingTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
"CheckReload",
err,
map[string]string{
"orgId": orgId,
},
)
if r.IsAccessError(err) {
log.Warning("[RPC STORE] CheckReload: Not logged in")
if r.Login() {
r.CheckForReload(orgId)
}
} else if !strings.Contains(err.Error(), "Cannot obtain response during") {
log.Warning("[RPC STORE] RPC Reload Checker encountered unexpected error: ", err)
}
time.Sleep(1 * time.Second)
} else if reload == true {
// Do the reload!
log.Warning("[RPC STORE] Received Reload instruction!")
go func() {
MainNotifier.Notify(Notification{Command: NoticeGroupReload})
}()
}
}
func (r *RPCStorageHandler) StartRPCLoopCheck(orgId string) {
if config.Global().SlaveOptions.DisableKeySpaceSync {
return
}
log.Info("[RPC] Starting keyspace poller")
for {
r.CheckForKeyspaceChanges(orgId)
time.Sleep(10 * time.Second)
}
}
func (r *RPCStorageHandler) StartRPCKeepaliveWatcher() {
log.WithFields(logrus.Fields{
"prefix": "RPC Conn Mgr",
}).Info("[RPC Conn Mgr] Starting keepalive watcher...")
for {
if err := r.SetKey("0000", "0000", 10); err != nil {
log.WithError(err).WithFields(logrus.Fields{
"prefix": "RPC Conn Mgr",
}).Info("Can't connect to RPC layer")
if r.IsAccessError(err) {
if r.Login() {
continue
}
}
if strings.Contains(err.Error(), "Cannot obtain response during timeout") {
continue
}
}
time.Sleep(10 * time.Second)
}
}
// CheckForKeyspaceChanges will poll for keysace changes
func (r *RPCStorageHandler) CheckForKeyspaceChanges(orgId string) {
log.Debug("Checking for keyspace changes...")
var keys interface{}
var err error
var funcName string
var req interface{}
reqData := map[string]string{}
if groupID := config.Global().SlaveOptions.GroupID; groupID == "" {
funcName = "GetKeySpaceUpdate"
req = orgId
reqData["orgId"] = orgId
} else {
funcName = "GetGroupKeySpaceUpdate"
req = GroupKeySpaceRequest{
OrgID: orgId,
GroupID: groupID,
}
reqData["orgId"] = orgId
reqData["GroupID"] = groupID
}
keys, err = RPCFuncClientSingleton.CallTimeout(funcName, req, GlobalRPCCallTimeout)
if err != nil {
emitRPCErrorEventKv(
rpcFuncClientSingletonCall,
funcName,
err,
reqData,
)
if r.IsAccessError(err) {
if r.Login() {
r.CheckForKeyspaceChanges(orgId)
}
}
log.Warning("Keysapce warning: ", err)
return
}
if keys == nil {
log.Info("Keys returned nil object, skipping check")
return
}
if len(keys.([]string)) > 0 {
log.Info("Keyspace changes detected, updating local cache")
go r.ProcessKeySpaceChanges(keys.([]string))
}
}