Пример #1
0
func NewQueryEngine(config Config) *QueryEngine {
	var err error
	qe := &QueryEngine{}
	qe.engine, err = kvengine.NewEngine(config.EngineName)
	if err != nil {
		panic(NewTabletErrorDB(FATAL, err))
	}
	qe.connPool = NewConnectionPool("ConnPool", config.PoolSize, time.Duration(config.IdleTimeout*1e9))
	qe.schemaInfo = NewSchemaInfo(config.QueryCacheSize, time.Duration(config.IdleTimeout*1e9))
	qe.consolidator = NewConsolidator()
	qe.maxResultSize = sync2.AtomicInt64(config.MaxResultSize)
	qe.streamBufferSize = sync2.AtomicInt64(config.StreamBufferSize)
	stats.Publish("MaxResultSize", stats.IntFunc(qe.maxResultSize.Get))
	stats.Publish("StreamBufferSize", stats.IntFunc(qe.streamBufferSize.Get))
	queryStats = stats.NewTimings("Queries")
	QPSRates = stats.NewRates("QPS", queryStats, 15, 60*time.Second)
	waitStats = stats.NewTimings("Waits")
	errorStats = stats.NewCounters("Errors")
	resultStats = stats.NewHistogram("Results", resultBuckets)
	return qe
}
Пример #2
0
// NewResourcePool creates a new ResourcePool pool.
// capacity is the initial capacity of the pool.
// maxCap is the maximum capacity.
// If a resource is unused beyond idleTimeout, it's discarded.
// An idleTimeout of 0 means that there is no timeout.
func NewResourcePool(factory Factory, capacity, maxCap int, idleTimeout time.Duration) *ResourcePool {
	if capacity <= 0 || maxCap <= 0 || capacity > maxCap {
		panic(fmt.Errorf("Invalid/out of range capacity"))
	}
	rp := &ResourcePool{
		resources:   make(chan resourceWrapper, maxCap),
		factory:     factory,
		capacity:    sync2.AtomicInt64(capacity),
		idleTimeout: sync2.AtomicDuration(idleTimeout),
	}
	for i := 0; i < capacity; i++ {
		rp.resources <- resourceWrapper{}
	}
	return rp
}