gotosocial/vendor/github.com/robfig/cron/v3/chain.go
tobi 07727753b9
[feature] Clean up/uncache remote media (#407)
* Add whereNotEmptyAndNotNull

* Add GetRemoteOlderThanDays

* Add GetRemoteOlderThanDays

* Add PruneRemote to Manager interface

* Start implementing PruneRemote

* add new attachment + status to tests

* fix up and test GetRemoteOlderThan

* fix bad import

* PruneRemote: return number pruned

* add Cached column to mediaattachment

* update + test pruneRemote

* update mediaTest

* use Cached column

* upstep bun to latest version

* embed structs in mediaAttachment

* migrate mediaAttachment to new format

* don't default cached to true

* select only remote media

* update db dependencies

* step bun back to last working version

* update pruneRemote to use Cached field

* fix storage path of test attachments

* add recache logic to manager

* fix trimmed aspect ratio

* test prune and recache

* return errwithcode

* tidy up different paths for emoji vs attachment

* fix incorrect thumbnail type being stored

* expose TransportController to media processor

* implement tee-ing recached content

* add thoughts of dog to test fedi attachments

* test get remote files

* add comment on PruneRemote

* add postData cleanup to recache

* test thumbnail fetching

* add incredible diagram

* go mod tidy

* buffer pipes for recache streaming

* test for client stops reading after 1kb

* add media-remote-cache-days to config

* add cron package

* wrap logrus so it's available to cron

* start and stop cron jobs gracefully
2022-03-07 11:08:26 +01:00

92 lines
2.1 KiB
Go

package cron
import (
"fmt"
"runtime"
"sync"
"time"
)
// JobWrapper decorates the given Job with some behavior.
type JobWrapper func(Job) Job
// Chain is a sequence of JobWrappers that decorates submitted jobs with
// cross-cutting behaviors like logging or synchronization.
type Chain struct {
wrappers []JobWrapper
}
// NewChain returns a Chain consisting of the given JobWrappers.
func NewChain(c ...JobWrapper) Chain {
return Chain{c}
}
// Then decorates the given job with all JobWrappers in the chain.
//
// This:
// NewChain(m1, m2, m3).Then(job)
// is equivalent to:
// m1(m2(m3(job)))
func (c Chain) Then(j Job) Job {
for i := range c.wrappers {
j = c.wrappers[len(c.wrappers)-i-1](j)
}
return j
}
// Recover panics in wrapped jobs and log them with the provided logger.
func Recover(logger Logger) JobWrapper {
return func(j Job) Job {
return FuncJob(func() {
defer func() {
if r := recover(); r != nil {
const size = 64 << 10
buf := make([]byte, size)
buf = buf[:runtime.Stack(buf, false)]
err, ok := r.(error)
if !ok {
err = fmt.Errorf("%v", r)
}
logger.Error(err, "panic", "stack", "...\n"+string(buf))
}
}()
j.Run()
})
}
}
// DelayIfStillRunning serializes jobs, delaying subsequent runs until the
// previous one is complete. Jobs running after a delay of more than a minute
// have the delay logged at Info.
func DelayIfStillRunning(logger Logger) JobWrapper {
return func(j Job) Job {
var mu sync.Mutex
return FuncJob(func() {
start := time.Now()
mu.Lock()
defer mu.Unlock()
if dur := time.Since(start); dur > time.Minute {
logger.Info("delay", "duration", dur)
}
j.Run()
})
}
}
// SkipIfStillRunning skips an invocation of the Job if a previous invocation is
// still running. It logs skips to the given logger at Info level.
func SkipIfStillRunning(logger Logger) JobWrapper {
return func(j Job) Job {
var ch = make(chan struct{}, 1)
ch <- struct{}{}
return FuncJob(func() {
select {
case v := <-ch:
j.Run()
ch <- v
default:
logger.Info("skip")
}
})
}
}