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1. separate timer in timer queue processor into dedicated file, add UT (
#602) * separate timer in timer queue processor into dedicated file, add UT * increase history cache size from 256 to 512, note, this value was previously 1024
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// Copyright (c) 2017 Uber Technologies, Inc. | ||
// | ||
// Permission is hereby granted, free of charge, to any person obtaining a copy | ||
// of this software and associated documentation files (the "Software"), to deal | ||
// in the Software without restriction, including without limitation the rights | ||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
// copies of the Software, and to permit persons to whom the Software is | ||
// furnished to do so, subject to the following conditions: | ||
// | ||
// The above copyright notice and this permission notice shall be included in | ||
// all copies or substantial portions of the Software. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
// THE SOFTWARE. | ||
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package history | ||
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import ( | ||
"sync" | ||
"time" | ||
) | ||
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type ( | ||
// TimerGate interface | ||
TimerGate interface { | ||
// FireChan return the channel which will be fired when time is up | ||
FireChan() <-chan struct{} | ||
// FireAfter check will the timer get fired after a certain time | ||
FireAfter(now time.Time) bool | ||
// Update update the timer gate, return true if update is a success | ||
// success means timer is idle or timer is set with a sooner time to fire | ||
Update(nextTime time.Time) bool | ||
// Close shutdown the timer | ||
Close() | ||
} | ||
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// TimerGateImpl is an timer implementation, | ||
// which basically is an wrrapper of golang's timer and | ||
// additional feature | ||
TimerGateImpl struct { | ||
// the channel which will be used to proxy the fired timer | ||
fireChan chan struct{} | ||
closeChan chan struct{} | ||
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// lock for timer and next wake up time | ||
sync.Mutex | ||
// the actual timer which will fire | ||
timer *time.Timer | ||
// variable indicating when the above timer will fire | ||
nextWakeupTime time.Time | ||
} | ||
) | ||
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// NewTimerGate create a new timer gate instance | ||
func NewTimerGate() TimerGate { | ||
timer := &TimerGateImpl{ | ||
timer: time.NewTimer(0), | ||
nextWakeupTime: time.Time{}, | ||
fireChan: make(chan struct{}), | ||
closeChan: make(chan struct{}), | ||
} | ||
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go func() { | ||
defer close(timer.fireChan) | ||
defer timer.timer.Stop() | ||
loop: | ||
for { | ||
select { | ||
case <-timer.timer.C: | ||
// re-transmit on gateC | ||
timer.fireChan <- struct{}{} | ||
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case <-timer.closeChan: | ||
// closed; cleanup and quit | ||
break loop | ||
} | ||
} | ||
}() | ||
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return timer | ||
} | ||
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// FireChan return the channel which will be fired when time is up | ||
func (timerGate *TimerGateImpl) FireChan() <-chan struct{} { | ||
return timerGate.fireChan | ||
} | ||
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// FireAfter check will the timer get fired after a certain time | ||
func (timerGate *TimerGateImpl) FireAfter(now time.Time) bool { | ||
return timerGate.nextWakeupTime.After(now) | ||
} | ||
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// Update update the timer gate, return true if update is a success | ||
// success means timer is idle or timer is set with a sooner time to fire | ||
func (timerGate *TimerGateImpl) Update(nextTime time.Time) bool { | ||
now := time.Now() | ||
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timerGate.Lock() | ||
defer timerGate.Unlock() | ||
if !timerGate.FireAfter(now) || timerGate.nextWakeupTime.After(nextTime) { | ||
// if timer will not fire or next wake time is after the "next" | ||
// then we need to update the timer to fire | ||
timerGate.nextWakeupTime = nextTime | ||
// reset timer to fire when the next message should be made 'visible' | ||
timerGate.timer.Reset(nextTime.Sub(now)) | ||
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// Notifies caller that next notification is reset to fire at passed in 'next' visibility time | ||
return true | ||
} | ||
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return false | ||
} | ||
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// Close shutdown the timer | ||
func (timerGate *TimerGateImpl) Close() { | ||
close(timerGate.closeChan) | ||
} |
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// Copyright (c) 2017 Uber Technologies, Inc. | ||
// | ||
// Permission is hereby granted, free of charge, to any person obtaining a copy | ||
// of this software and associated documentation files (the "Software"), to deal | ||
// in the Software without restriction, including without limitation the rights | ||
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
// copies of the Software, and to permit persons to whom the Software is | ||
// furnished to do so, subject to the following conditions: | ||
// | ||
// The above copyright notice and this permission notice shall be included in | ||
// all copies or substantial portions of the Software. | ||
// | ||
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
// THE SOFTWARE. | ||
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package history | ||
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import ( | ||
"os" | ||
"testing" | ||
"time" | ||
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log "github.com/sirupsen/logrus" | ||
"github.com/stretchr/testify/suite" | ||
) | ||
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type ( | ||
timerSuite struct { | ||
suite.Suite | ||
timerGate TimerGate | ||
} | ||
) | ||
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func TestTimerSuite(t *testing.T) { | ||
s := new(timerSuite) | ||
suite.Run(t, s) | ||
} | ||
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func (s *timerSuite) SetupSuite() { | ||
if testing.Verbose() { | ||
log.SetOutput(os.Stdout) | ||
} | ||
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} | ||
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func (s *timerSuite) TearDownSuite() { | ||
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} | ||
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func (s *timerSuite) SetupTest() { | ||
s.timerGate = NewTimerGate() | ||
} | ||
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func (s *timerSuite) TearDownTest() { | ||
s.timerGate.Close() | ||
} | ||
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func (s *timerSuite) TestTimerFire() { | ||
now := time.Now() | ||
timerDelay := now.Add(1 * time.Second) | ||
deadlineDelay := now.Add(2 * time.Second) | ||
s.timerGate.Update(timerDelay) | ||
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select { | ||
case <-s.timerGate.FireChan(): | ||
case <-time.NewTimer(deadlineDelay.Sub(now)).C: | ||
s.Fail("timer should fire before test deadline") | ||
} | ||
} | ||
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func (s *timerSuite) TestTimerFireAfterUpdate_Updated() { | ||
now := time.Now() | ||
timerDelay := now.Add(5 * time.Second) | ||
updatedTimerDelay := now.Add(1 * time.Second) | ||
deadlineDelay := now.Add(3 * time.Second) | ||
s.timerGate.Update(timerDelay) | ||
s.True(s.timerGate.Update(updatedTimerDelay)) | ||
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select { | ||
case <-s.timerGate.FireChan(): | ||
case <-time.NewTimer(deadlineDelay.Sub(now)).C: | ||
s.Fail("timer should fire before test deadline") | ||
} | ||
} | ||
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func (s *timerSuite) TestTimerFireAfterUpdate_NotUpdated() { | ||
now := time.Now() | ||
timerDelay := now.Add(1 * time.Second) | ||
updatedTimerDelay := now.Add(3 * time.Second) | ||
deadlineDelay := now.Add(2 * time.Second) | ||
s.timerGate.Update(timerDelay) | ||
s.False(s.timerGate.Update(updatedTimerDelay)) | ||
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select { | ||
case <-s.timerGate.FireChan(): | ||
case <-time.NewTimer(deadlineDelay.Sub(now)).C: | ||
s.Fail("timer should fire before test deadline") | ||
} | ||
} | ||
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func (s *timerSuite) TestTimerWillFire() { | ||
now := time.Now() | ||
timerDelay := now.Add(2 * time.Second) | ||
timeBeforeTimer := now.Add(1 * time.Second) | ||
timeAfterTimer := now.Add(3 * time.Second) | ||
s.timerGate.Update(timerDelay) | ||
s.True(s.timerGate.FireAfter(timeBeforeTimer)) | ||
s.False(s.timerGate.FireAfter(timeAfterTimer)) | ||
} |
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