63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
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package pool
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import (
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"context"
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"errors"
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"io"
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"time"
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xtime "go-common/library/time"
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)
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var (
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// ErrPoolExhausted connections are exhausted.
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ErrPoolExhausted = errors.New("container/pool exhausted")
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// ErrPoolClosed connection pool is closed.
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ErrPoolClosed = errors.New("container/pool closed")
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// nowFunc returns the current time; it's overridden in tests.
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nowFunc = time.Now
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)
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// Config is the pool configuration struct.
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type Config struct {
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// Active number of items allocated by the pool at a given time.
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// When zero, there is no limit on the number of items in the pool.
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Active int
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// Idle number of idle items in the pool.
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Idle int
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// Close items after remaining item for this duration. If the value
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// is zero, then item items are not closed. Applications should set
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// the timeout to a value less than the server's timeout.
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IdleTimeout xtime.Duration
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// If WaitTimeout is set and the pool is at the Active limit, then Get() waits WatiTimeout
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// until a item to be returned to the pool before returning.
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WaitTimeout xtime.Duration
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// If WaitTimeout is not set, then Wait effects.
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// if Wait is set true, then wait until ctx timeout, or default flase and return directly.
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Wait bool
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}
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type item struct {
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createdAt time.Time
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c io.Closer
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}
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func (i *item) expired(timeout time.Duration) bool {
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if timeout <= 0 {
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return false
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}
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return i.createdAt.Add(timeout).Before(nowFunc())
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}
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func (i *item) close() error {
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return i.c.Close()
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}
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// Pool interface.
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type Pool interface {
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Get(ctx context.Context) (io.Closer, error)
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Put(ctx context.Context, c io.Closer, forceClose bool) error
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Close() error
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}
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