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pool.go
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pool.go
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package thrift_transport_pool
import (
"errors"
"git.apache.org/thrift.git/lib/go/thrift"
"sync"
"time"
)
const DEFAULT_TIME_OUT_TO_GET_CLIENT = 5 * time.Second
var ErrPopTimeOut = errors.New("Timout to pop a client")
type Pool struct {
TimeOut time.Duration
Size int
CreatedCount int
Pool chan thrift.TTransport
HostPort string
Block func(string) (thrift.TTransport, error)
mu sync.Mutex
}
func NewPool(size int, hostPort string, block func(hostPort string) (thrift.TTransport, error)) *Pool {
return &Pool{
TimeOut: DEFAULT_TIME_OUT_TO_GET_CLIENT,
Size: size,
CreatedCount: 0,
Pool: make(chan thrift.TTransport, size),
HostPort: hostPort,
Block: block,
mu: sync.Mutex{},
}
}
func (this *Pool) Pop() (thrift.TTransport, error) {
this.mu.Lock()
defer this.mu.Unlock()
if this.CreatedCount < this.Size {
this.CreatedCount += 1
return NewRetryedTransport(this.HostPort, this.Block)
}
select {
case t := <-this.Pool:
return t, nil
case <-time.After(this.TimeOut):
return nil, ErrPopTimeOut
}
}
func (this *Pool) Push(t thrift.TTransport) {
if len(this.Pool) < this.Size {
this.Pool <- t
}
}