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/*
GoToSocial
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package workers
import (
"context"
"log"
"runtime"
"codeberg.org/gruf/go-runners"
"codeberg.org/gruf/go-sched"
"github.com/superseriousbusiness/gotosocial/internal/messages"
)
type Workers struct {
// Main task scheduler instance.
Scheduler sched.Scheduler
// ClientAPI / federator worker pools.
ClientAPI runners.WorkerPool
Federator runners.WorkerPool
// Enqueue functions for clientAPI / federator worker pools,
// these are pointers to Processor{}.Enqueue___() msg functions.
// This prevents dependency cycling as Processor depends on Workers.
EnqueueClientAPI func(context.Context, messages.FromClientAPI)
EnqueueFederator func(context.Context, messages.FromFederator)
// Media manager worker pools.
Media runners.WorkerPool
// prevent pass-by-value.
_ nocopy
}
// Start will start all of the contained worker pools (and global scheduler).
func (w *Workers) Start() {
// Get currently set GOMAXPROCS.
maxprocs := runtime.GOMAXPROCS(0)
tryUntil("starting scheduler", 5, func() bool {
return w.Scheduler.Start(nil)
})
tryUntil("starting client API workerpool", 5, func() bool {
return w.ClientAPI.Start(4*maxprocs, 400*maxprocs)
})
tryUntil("starting federator workerpool", 5, func() bool {
return w.Federator.Start(4*maxprocs, 400*maxprocs)
})
tryUntil("starting media workerpool", 5, func() bool {
return w.Media.Start(8*maxprocs, 80*maxprocs)
})
}
// Stop will stop all of the contained worker pools (and global scheduler).
func (w *Workers) Stop() {
tryUntil("stopping scheduler", 5, w.Scheduler.Stop)
tryUntil("stopping client API workerpool", 5, w.ClientAPI.Stop)
tryUntil("stopping federator workerpool", 5, w.Federator.Stop)
tryUntil("stopping media workerpool", 5, w.Media.Stop)
}
// nocopy when embedded will signal linter to
// error on pass-by-value of parent struct.
type nocopy struct{}
func (*nocopy) Lock() {}
func (*nocopy) Unlock() {}
// tryUntil will attempt to call 'do' for 'count' attempts, before panicking with 'msg'.
func tryUntil(msg string, count int, do func() bool) {
for i := 0; i < count; i++ {
if do() {
return
}
}
log.Panicf("failed %s after %d tries", msg, count)
}
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