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package libpod
// State is a storage backend for libpod's current state
type State interface {
// Close performs any pre-exit cleanup (e.g. closing database
// connections) that may be required
Close() error
// Refresh clears container and pod states after a reboot
Refresh() error
// Return a container from the database from its full ID
Container(id string) (*Container, error)
// Return a container from the database by full or partial ID or full
// name
LookupContainer(idOrName string) (*Container, error)
// Check if a container with the given full ID exists in the database
HasContainer(id string) (bool, error)
// Adds container to state
// The container cannot be part of a pod
// The container must have globally unique name and ID - pod names and
// IDs also conflict with container names and IDs
AddContainer(ctr *Container) error
// Removes container from state
// Containers that are part of pods must use RemoveContainerFromPod
RemoveContainer(ctr *Container) error
// UpdateContainer updates a container's state from the backing store
UpdateContainer(ctr *Container) error
// SaveContainer saves a container's current state to the backing store
SaveContainer(ctr *Container) error
// ContainerInUse checks if other containers depend upon a given
// container
// It returns a slice of the IDs of containers which depend on the given
// container. If the slice is empty, no container depend on the given
// container.
// A container cannot be removed if other containers depend on it
ContainerInUse(ctr *Container) ([]string, error)
// Retrieves all containers presently in state
AllContainers() ([]*Container, error)
// Accepts full ID of pod
Pod(id string) (*Pod, error)
// Accepts full or partial IDs (as long as they are unique) and names
LookupPod(idOrName string) (*Pod, error)
// Checks if a pod with the given ID is present in the state
HasPod(id string) (bool, error)
// Check if a pod has a container with the given ID
PodHasContainer(pod *Pod, ctrID string) (bool, error)
// Get the IDs of all containers in a pod
PodContainersByID(pod *Pod) ([]string, error)
// Get all the containers in a pod
PodContainers(pod *Pod) ([]*Container, error)
// Adds pod to state
AddPod(pod *Pod) error
// Removes pod from state
// Only empty pods can be removed from the state
RemovePod(pod *Pod) error
// Remove all containers from a pod
// Used to simultaneously remove containers that might otherwise have
// dependency issues
// Will fail if a dependency outside the pod is encountered
RemovePodContainers(pod *Pod) error
// AddContainerToPod adds a container to an existing pod
// The container given will be added to the state and the pod
AddContainerToPod(pod *Pod, ctr *Container) error
// RemoveContainerFromPod removes a container from an existing pod
// The container will also be removed from the state
RemoveContainerFromPod(pod *Pod, ctr *Container) error
// UpdatePod updates a pod's state from the database
UpdatePod(pod *Pod) error
// SavePod saves a pod's state to the database
SavePod(pod *Pod) error
// Retrieves all pods presently in state
AllPods() ([]*Pod, error)
}
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