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package container
import (
"github.com/Sirupsen/logrus"
"github.com/docker/docker/api/types"
)
// Health holds the current container health-check state
type Health struct {
types.Health
stop chan struct{} // Write struct{} to stop the monitor
}
// String returns a human-readable description of the health-check state
func (s *Health) String() string {
// This happens when the container is being shutdown and the monitor has stopped
// or the monitor has yet to be setup.
if s.stop == nil {
return types.Unhealthy
}
switch s.Status {
case types.Starting:
return "health: starting"
default: // Healthy and Unhealthy are clear on their own
return s.Status
}
}
// OpenMonitorChannel creates and returns a new monitor channel. If there already is one,
// it returns nil.
func (s *Health) OpenMonitorChannel() chan struct{} {
if s.stop == nil {
logrus.Debug("OpenMonitorChannel")
s.stop = make(chan struct{})
return s.stop
}
return nil
}
// CloseMonitorChannel closes any existing monitor channel.
func (s *Health) CloseMonitorChannel() {
if s.stop != nil {
logrus.Debug("CloseMonitorChannel: waiting for probe to stop")
close(s.stop)
s.stop = nil
logrus.Debug("CloseMonitorChannel done")
}
}
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