github.com/annchain/OG@v0.0.9/ffchan/ffchan.go (about)

     1  // Copyright © 2019 Annchain Authors <EMAIL ADDRESS>
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package ffchan
    15  
    16  import (
    17  	"github.com/annchain/OG/arefactor/common/goroutine"
    18  	"github.com/sirupsen/logrus"
    19  	"reflect"
    20  	"runtime/debug"
    21  	"time"
    22  )
    23  
    24  type TimeoutSender struct {
    25  	channel   interface{}
    26  	val       interface{}
    27  	groupName string
    28  	timeout   time.Duration
    29  	C         chan bool
    30  }
    31  
    32  func NewTimeoutSenderShort(channel interface{}, val interface{}, groupName string) *TimeoutSender {
    33  	return NewTimeoutSender(channel, val, groupName, 5000)
    34  }
    35  
    36  func NewTimeoutSender(channel interface{}, val interface{}, groupName string, timeoutMs int) *TimeoutSender {
    37  	t := &TimeoutSender{
    38  		groupName: groupName,
    39  		channel:   channel,
    40  		timeout:   time.Millisecond * time.Duration(timeoutMs),
    41  		val:       val,
    42  		C:         make(chan bool),
    43  	}
    44  	c := make(chan struct{})
    45  	goroutine.New(func() {
    46  		defer close(c)
    47  		vChan := reflect.ValueOf(t.channel)
    48  		vVal := reflect.ValueOf(t.val)
    49  		vChan.Send(vVal)
    50  	})
    51  
    52  	goroutine.New(func() {
    53  		start := time.Now()
    54  	loop:
    55  		for {
    56  			select {
    57  			case <-c:
    58  				t.C <- true
    59  				break loop
    60  			case <-time.After(t.timeout):
    61  				logrus.WithField("chan", t.groupName).
    62  					WithField("val", t.val).
    63  					WithField("elapse", time.Now().Sub(start)).
    64  					Warn("Timeout on channel writing. Potential block issue.")
    65  				debug.PrintStack()
    66  				if t.timeout < time.Second {
    67  					time.Sleep(time.Second)
    68  				}
    69  			}
    70  		}
    71  	})
    72  
    73  	return t
    74  }