service

type AgentInfo struct {

	// ID is the string that identifies the agent uniquely within
	// a juju environment.
	ID string

	// Kind is the kind of agent.
	Kind AgentKind

	// DataDir is the path to the agent's data dir.
	DataDir string

	// LogDir is the path to the agent's log dir.
	LogDir string
	// contains filtered or unexported fields
}

type AgentKind string

type RestartableService interface {
	// Restart restarts the service.
	Restart() error
}

type Service interface {
	ServiceActions

	// Name returns the service's name.
	Name() string

	// Conf returns the service's conf data.
	Conf() common.Conf

	// Running returns a boolean value that denotes
	// whether or not the service is running.
	Running() (bool, error)

	// Exists returns whether the service configuration exists in the
	// init directory with the same content that this Service would have
	// if installed.
	Exists() (bool, error)

	// Installed will return a boolean value that denotes
	// whether or not the service is installed.
	Installed() (bool, error)

	// InstallCommands returns the list of commands to run on a
	// (remote) host to install the service.
	InstallCommands() ([]string, error)

	// StartCommands returns the list of commands to run on a
	// (remote) host to start the service.
	StartCommands() ([]string, error)

	// WriteService writes the service conf data. If the service is
	// running, WriteService adds links to allow for manual and automatic
	// starting of the service.
	WriteService() error
}

type ServiceActions interface {
	// Start will try to start the service.
	Start() error

	// Stop will try to stop the service.
	Stop() error

	// Install installs a service.
	Install() error

	// Remove will remove the service.
	Remove() error
}

type SystemdServiceManager interface {
	// FindAgents finds all the agents available in the machine.
	FindAgents(dataDir string) (string, []string, []string, error)

	// WriteSystemdAgent creates systemd files and create symlinks for the
	// machine passed in the standard filepath.
	WriteSystemdAgent(
		machineAgent string, dataDir, symLinkSystemdMultiUserDir string,
	) error

	//CreateAgentConf creates the configfile for specified agent running on a
	// host with specified series.
	CreateAgentConf(agentName string, dataDir string) (common.Conf, error)

	// WriteServiceFile writes the service file for machine agent in the
	// /etc/systemd/system path.
	WriteServiceFile() error
}