Exemple #1
0
func NewFunServant(cf *config.ConfigServant) (this *FunServantImpl) {
	this = &FunServantImpl{
		conf:            cf,
		digitNormalizer: regexp.MustCompile(`\d+`),
		proxyMode:       config.Engine.IsProxyOnly(),
	}

	// http REST to export internal state
	server.RegisterHttpApi("/svt/{cmd}",
		func(w http.ResponseWriter, req *http.Request,
			params map[string]interface{}) (interface{}, error) {
			return this.handleHttpQuery(w, req, params)
		}).Methods("GET")

	this.sessions = cache.NewLruCache(cf.SessionMaxItems)
	this.mysqlMergeMutexMap = mutexmap.New(cf.Mysql.JsonMergeMaxOutstandingItems)

	this.ctxReasonPercentage = metrics.NewPercentCounter()
	metrics.Register("call.reason", this.ctxReasonPercentage)
	this.dbCacheHits = metrics.NewPercentCounter()
	metrics.Register("db.cache.hits", this.dbCacheHits)

	this.createServants()

	return
}
Exemple #2
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func newMysql(dsn string, maxStmtCached int, bc *config.ConfigBreaker) *mysql {
	this := new(mysql)
	if bc == nil {
		bc = &config.ConfigBreaker{
			FailureAllowance: 5,
			RetryTimeout:     time.Second * 10,
		}
	}
	this.dsn = dsn
	this.breaker = &breaker.Consecutive{
		FailureAllowance: bc.FailureAllowance,
		RetryTimeout:     bc.RetryTimeout}
	if maxStmtCached > 0 {
		this.stmtsStore = cache.NewLruCache(maxStmtCached)
		this.stmtsStore.OnEvicted = func(key cache.Key, value interface{}) {
			query := key.(string)
			stmt := value.(*sql.Stmt)
			stmt.Close()

			log.Debug("[%s] stmt[%s] closed", this.dsn, query)
		}
	}

	return this
}
Exemple #3
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func NewFunServant(cf *config.ConfigServant) (this *FunServantImpl) {
	this = &FunServantImpl{conf: cf}
	this.lc = cache.NewLruCache(this.conf.Lcache.LruMaxItems)
	memcacheServers := this.conf.Memcache.ServerList()
	this.mc = memcache.New(this.conf.Memcache.HashStrategy, memcacheServers...)

	log.Debug("memcache servers %v", memcacheServers)
	return
}
Exemple #4
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func NewFunServant(cf *config.ConfigServant) (this *FunServantImpl) {
	this = &FunServantImpl{conf: cf}
	this.lc = cache.NewLruCache(this.conf.Lcache.LruMaxItems)
	this.lc.OnEvicted = this.onLcLruEvicted

	memcacheServers := this.conf.Memcache.ServerList()
	this.mc = memcache.New(this.conf.Memcache.HashStrategy, memcacheServers...)
	this.mc.Timeout = time.Duration(this.conf.Memcache.Timeout) * time.Second
	this.mc.MaxIdleConnsPerServer = this.conf.Memcache.MaxIdleConnsPerServer

	this.mg = mongo.New(this.conf.Mongodb)

	return
}
func newStandardServerSelector(cf *config.ConfigMysql) (this *StandardServerSelector) {
	this = new(StandardServerSelector)
	this.conf = cf
	this.lookupCache = cache.NewLruCache(cf.LookupCacheMaxItems)
	this.clients = make(map[string]*mysql)
	for _, server := range cf.Servers {
		my := newMysql(server.DSN(), cf.CachePrepareStmtMaxItems, &cf.Breaker)
		for retries := uint(0); retries < cf.Breaker.FailureAllowance; retries++ {
			log.Debug("mysql connecting: %s", server.DSN())

			if my.Open() == nil && my.Ping() == nil {
				// sql.Open() does not establish any connections to the database
				// sql.Ping() does
				break
			}

			my.breaker.Fail()
		}

		if !my.breaker.Open() {
			my.db.SetMaxIdleConns(cf.MaxIdleConnsPerServer)
			// TODO https://code.google.com/p/go/source/detail?r=8a7ac002f840
			my.db.SetMaxOpenConns(cf.MaxConnsPerServer)
			this.clients[server.Pool] = my

			if cf.MaxIdleTime > 0 {
				go func() {
					for _ = range time.Tick(cf.MaxIdleTime) {
						if err := my.Ping(); err != nil {
							log.Error("mysql[%s]: %s", server.DSN(), err.Error())
							my.breaker.Fail()
						}

					}
				}()
			}
		}

	}

	return
}
Exemple #6
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func New(cf *config.ConfigLock) *Lock {
	this := &Lock{cf: cf}
	this.items = cache.NewLruCache(cf.MaxItems)
	return this
}
Exemple #7
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// TODO kill some servant if new conf turns it off
func (this *FunServantImpl) recreateServants(cf *config.ConfigServant) {
	log.Info("recreating servants...")

	if this.conf.IdgenWorkerId != cf.IdgenWorkerId {
		log.Debug("recreating servant: idgen")
		var err error
		this.idgen, err = idgen.NewIdGenerator(cf.IdgenWorkerId)
		if err != nil {
			panic(err)
		}
	}

	if cf.Lcache.Enabled() &&
		this.conf.Lcache.MaxItems != cf.Lcache.MaxItems {
		log.Debug("recreating servant: lcache")
		this.lc = cache.NewLruCache(cf.Lcache.MaxItems)
		this.lc.OnEvicted = this.onLcLruEvicted
	}

	if cf.Memcache.Enabled() &&
		!reflect.DeepEqual(*this.conf.Memcache, *cf.Memcache) {
		log.Debug("recreating servant: memcache")
		this.mc = memcache.New(cf.Memcache)
	}

	if cf.Redis.Enabled() &&
		!reflect.DeepEqual(*this.conf.Redis, *cf.Redis) {
		log.Debug("recreating servant: redis")
		this.rd = redis.New(cf.Redis)
	}

	if cf.Mysql.Enabled() &&
		!reflect.DeepEqual(*this.conf.Mysql, *cf.Mysql) {
		log.Debug("recreating servant: mysql")
		this.my = mysql.New(cf.Mysql)

		switch cf.Mysql.CacheStore {
		case "mem":
			this.dbCacheStore = store.NewMemStore(cf.Mysql.CacheStoreMemMaxItems)

		case "redis":
			this.dbCacheStore = store.NewRedisStore(cf.Mysql.CacheStoreRedisPool,
				cf.Redis)

		default:
			panic("unknown cache store")
		}
	}

	if cf.Mongodb.Enabled() &&
		!reflect.DeepEqual(*this.conf.Mongodb, *cf.Mongodb) {
		log.Debug("recreating servant: mongodb")
		this.mg = mongo.New(cf.Mongodb)
	}

	if cf.Couchbase.Enabled() &&
		!reflect.DeepEqual(*this.conf.Couchbase, *cf.Couchbase) {
		log.Debug("recreating servant: couchbase")

		var err error
		// pool is always 'default'
		this.cb, err = couch.New(cf.Couchbase.Servers, "default")
		if err != nil {
			log.Error("couchbase: %s", err)
		}
	}

	this.conf = cf

	log.Info("servants recreated")
}
Exemple #8
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func (this *FunServantImpl) createServants() {
	log.Info("creating servants...")

	// proxy can dynamically auto discover peers
	if this.conf.Proxy.Enabled() {
		log.Debug("creating servant: proxy")
		this.proxy = proxy.New(this.conf.Proxy)
	} else {
		panic("peers proxy required")
	}

	log.Debug("creating servant: idgen")
	var err error
	this.idgen, err = idgen.NewIdGenerator(this.conf.IdgenWorkerId)
	if err != nil {
		panic(err)
	}

	if this.conf.Lcache.Enabled() {
		log.Debug("creating servant: lcache")
		this.lc = cache.NewLruCache(this.conf.Lcache.MaxItems)
		this.lc.OnEvicted = this.onLcLruEvicted
	}

	if this.conf.Memcache.Enabled() {
		log.Debug("creating servant: memcache")
		this.mc = memcache.New(this.conf.Memcache)
	}

	if this.conf.Redis.Enabled() {
		log.Debug("creating servant: redis")
		this.rd = redis.New(this.conf.Redis)
	}

	if this.conf.Lock.Enabled() {
		log.Debug("creating servant: lock")
		this.lk = lock.New(this.conf.Lock)
	}

	if this.conf.Mysql.Enabled() {
		log.Debug("creating servant: mysql")
		this.my = mysql.New(this.conf.Mysql)

		switch this.conf.Mysql.CacheStore {
		case "mem":
			this.dbCacheStore = store.NewMemStore(this.conf.Mysql.CacheStoreMemMaxItems)

		case "redis":
			this.dbCacheStore = store.NewRedisStore(this.conf.Mysql.CacheStoreRedisPool,
				this.conf.Redis)

		default:
			panic("unknown mysql cache store")
		}
	}

	if this.conf.Mongodb.Enabled() {
		log.Debug("creating servant: mongodb")
		this.mg = mongo.New(this.conf.Mongodb)
		if this.conf.Mongodb.DebugProtocol ||
			this.conf.Mongodb.DebugHeartbeat {
			mgo.SetLogger(&mongoProtocolLogger{})
			mgo.SetDebug(this.conf.Mongodb.DebugProtocol)
		}
	}

	if this.conf.Couchbase.Enabled() {
		log.Debug("creating servant: couchbase")

		var err error
		// pool is always 'default'
		this.cb, err = couch.New(this.conf.Couchbase.Servers, "default")
		if err != nil {
			log.Error("couchbase: %s", err)
		}
	}

	log.Info("servants created")
}
Exemple #9
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func New(maxEntries int) *MutexMap {
	this := &MutexMap{}
	this.items = cache.NewLruCache(maxEntries)
	return this
}
Exemple #10
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func NewMemStore(maxEntries int) *MemStore {
	this := &MemStore{data: cache.NewLruCache(maxEntries)}
	return this
}