func NewTxPool(name string, capacity int, timeout, poolTimeout, idleTimeout time.Duration) *TxPool {
axp := &TxPool{
pool: dbconnpool.NewConnectionPool(name, capacity, idleTimeout),
activePool: pools.NewNumbered(),
lastId: sync2.AtomicInt64(time.Now().UnixNano()),
timeout: sync2.AtomicDuration(timeout),
poolTimeout: sync2.AtomicDuration(poolTimeout),
ticks: timer.NewTimer(timeout / 10),
txStats: stats.NewTimings("Transactions"),
}
// Careful: pool also exports name+"xxx" vars,
// but we know it doesn't export Timeout.
stats.Publish(name+"Timeout", stats.DurationFunc(axp.timeout.Get))
stats.Publish(name+"PoolTimeout", stats.DurationFunc(axp.poolTimeout.Get))
return axp
}
// NewResourcePool creates a new ResourcePool pool.
// capacity is the number of active resources in the pool:
// there can be up to 'capacity' of these at a given time.
// maxCap specifies the extent to which the pool can be resized
// in the future through the SetCapacity function.
// You cannot resize the pool beyond maxCap.
// 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(errors.New("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
}