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dbus: add helper methods for multiple start/stop with wait #415

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dbus: add helper methods for multiple start/stop with wait #415

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66 changes: 66 additions & 0 deletions dbus/methods.go
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,39 @@ func (c *Conn) StartUnitContext(ctx context.Context, name string, mode string, c
return c.startJob(ctx, ch, "org.freedesktop.systemd1.Manager.StartUnit", name, mode)
}

// Starts Multiple units and waits for their success or failure before returning
func (c *Conn) StartMultipleUnitsAndWait(ctx context.Context, names []string, mode string) ([]string, []error) {
channels := make([]chan string, len(names))
res := make([]string, len(names))
errs := make([]error, len(names))
for i := range names {
channels[i] = make(chan string, 1)
}
for i, name := range names {
_, errs[i] = c.StartUnitContext(ctx, name, mode, channels[i])
if errs[i] != nil {
channels[i] = nil
}
}
for i, ch := range channels {
if ch == nil {
continue
}
select {
case status := <-ch:
res[i] = status
case <-ctx.Done():
errs[i] = fmt.Errorf("operation halted: %w", ctx.Err())
}
}
for _, err := range errs {
if err != nil {
return res, errs
}
}
return res, nil
}

// Deprecated: use StopUnitContext instead.
func (c *Conn) StopUnit(name string, mode string, ch chan<- string) (int, error) {
return c.StopUnitContext(context.Background(), name, mode, ch)
Expand All @@ -123,6 +156,39 @@ func (c *Conn) StopUnitContext(ctx context.Context, name string, mode string, ch
return c.startJob(ctx, ch, "org.freedesktop.systemd1.Manager.StopUnit", name, mode)
}

// Stops Multiple units and waits for their success or failure before returning
func (c *Conn) StopMultipleUnitsAndWait(ctx context.Context, names []string, mode string) ([]string, []error) {
channels := make([]chan string, len(names))
res := make([]string, len(names))
errs := make([]error, len(names))
for i := range names {
channels[i] = make(chan string, 1)
}
for i, name := range names {
_, errs[i] = c.StopUnitContext(ctx, name, mode, channels[i])
if errs[i] != nil {
channels[i] = nil
}
}
for i, ch := range channels {
if ch == nil {
continue
}
select {
case status := <-ch:
res[i] = status
case <-ctx.Done():
errs[i] = fmt.Errorf("operation halted: %w", ctx.Err())
}
}
for _, err := range errs {
if err != nil {
return res, errs
}
}
return res, nil
}

// Deprecated: use ReloadUnitContext instead.
func (c *Conn) ReloadUnit(name string, mode string, ch chan<- string) (int, error) {
return c.ReloadUnitContext(context.Background(), name, mode, ch)
Expand Down