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73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package msgdispatcher
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import (
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"fmt"
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"sync"
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"time"
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)
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// TODO: dyh, move to config
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var (
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MaxTolerantLag = 3 * time.Second
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DefaultTargetChanSize = 1024
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)
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type target struct {
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vchannel string
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ch chan *MsgPack
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pos *Pos
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closeMu sync.Mutex
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closeOnce sync.Once
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closed bool
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}
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func newTarget(vchannel string, pos *Pos) *target {
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t := &target{
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vchannel: vchannel,
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ch: make(chan *MsgPack, DefaultTargetChanSize),
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pos: pos,
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}
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t.closed = false
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return t
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}
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func (t *target) close() {
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t.closeMu.Lock()
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defer t.closeMu.Unlock()
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t.closeOnce.Do(func() {
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t.closed = true
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close(t.ch)
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})
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}
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func (t *target) send(pack *MsgPack) error {
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t.closeMu.Lock()
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defer t.closeMu.Unlock()
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if t.closed {
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return nil
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}
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select {
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case <-time.After(MaxTolerantLag):
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return fmt.Errorf("send target timeout, vchannel=%s, timeout=%s", t.vchannel, MaxTolerantLag)
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case t.ch <- pack:
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return nil
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}
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}
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