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Queue: Make WorkerPools and Queues flushable (#10001)

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* Make WorkerPools and Queues flushable

Adds Flush methods to Queues and the WorkerPool
Further abstracts the WorkerPool
Adds a final step to Flush the queues in the defer from PrintCurrentTest
Fixes an issue with Settings inheritance in queues

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Change to for loop

* Add IsEmpty and begin just making the queues composed WorkerPools

* subsume workerpool into the queues and create a flushable interface

* Add manager command

* Move flushall to queue.Manager and add to testlogger

* As per @guillep2k

* as per @guillep2k

* Just make queues all implement flushable and clean up the wrapped queue flushes

* cope with no timeout

Co-authored-by: Lauris BH <lauris@nix.lv>
This commit is contained in:
zeripath
2020-01-29 01:01:06 +00:00
committed by GitHub
parent 7c84dbca4f
commit c01221e70f
27 changed files with 1030 additions and 327 deletions
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46
modules/graceful/manager_unix.go
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@@ -110,28 +110,19 @@ func (g *Manager) handleSignals(ctx context.Context) {
case sig := <-signalChannel:
switch sig {
case syscall.SIGHUP:
if setting.GracefulRestartable {
log.Info("PID: %d. Received SIGHUP. Forking...", pid)
err := g.doFork()
if err != nil && err.Error() != "another process already forked. Ignoring this one" {
log.Error("Error whilst forking from PID: %d : %v", pid, err)
}
} else {
log.Info("PID: %d. Received SIGHUP. Not set restartable. Shutting down...", pid)
g.doShutdown()
}
log.Info("PID: %d. Received SIGHUP. Attempting GracefulShutdown...", pid)
g.DoGracefulShutdown()
case syscall.SIGUSR1:
log.Info("PID %d. Received SIGUSR1.", pid)
case syscall.SIGUSR2:
log.Warn("PID %d. Received SIGUSR2. Hammering...", pid)
g.doHammerTime(0 * time.Second)
g.DoImmediateHammer()
case syscall.SIGINT:
log.Warn("PID %d. Received SIGINT. Shutting down...", pid)
g.doShutdown()
g.DoGracefulShutdown()
case syscall.SIGTERM:
log.Warn("PID %d. Received SIGTERM. Shutting down...", pid)
g.doShutdown()
g.DoGracefulShutdown()
case syscall.SIGTSTP:
log.Info("PID %d. Received SIGTSTP.", pid)
default:
@@ -139,7 +130,7 @@ func (g *Manager) handleSignals(ctx context.Context) {
}
case <-ctx.Done():
log.Warn("PID: %d. Background context for manager closed - %v - Shutting down...", pid, ctx.Err())
g.doShutdown()
g.DoGracefulShutdown()
}
}
}
@@ -160,6 +151,31 @@ func (g *Manager) doFork() error {
return err
}
// DoGracefulRestart causes a graceful restart
func (g *Manager) DoGracefulRestart() {
if setting.GracefulRestartable {
log.Info("PID: %d. Forking...", os.Getpid())
err := g.doFork()
if err != nil && err.Error() != "another process already forked. Ignoring this one" {
log.Error("Error whilst forking from PID: %d : %v", os.Getpid(), err)
}
} else {
log.Info("PID: %d. Not set restartable. Shutting down...", os.Getpid())
g.doShutdown()
}
}
// DoImmediateHammer causes an immediate hammer
func (g *Manager) DoImmediateHammer() {
g.doHammerTime(0 * time.Second)
}
// DoGracefulShutdown causes a graceful shutdown
func (g *Manager) DoGracefulShutdown() {
g.doShutdown()
}
// RegisterServer registers the running of a listening server, in the case of unix this means that the parent process can now die.
// Any call to RegisterServer must be matched by a call to ServerDone
func (g *Manager) RegisterServer() {