var connectionPool *thrift_pool.ConnectionPool = thrift_pool.NewConnectionPool(CTR_THRIFT_POOL_SIZE, CTR_THRIFT_POOL_TIMEOUT, CTR_CLIENT_TIMES, example.CreateConnection, example.IsConnectionOpen, example.CloseConnection)
var client *hello.HelloClient
clientChan := make(chan interface{})
errClientChan := make(chan error)

go connectionPool.GetConnection(clientChan, errClientChan)
select {
case res := <-clientChan:
	client = res.(*hello.HelloClient)
case err := <-errClientChan:
	fmt.Println("error", err)
	return
case <-time.After(CTR_TIME_WAIT):
	fmt.Println("获取client超时")
	return
}