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Update comments in BoltDB and In-Memory states

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Better explain the inner workings of both state types in comments
to make reviews and changes easier.

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
This commit is contained in:
Matthew Heon
2018-07-24 16:11:26 -04:00
parent a05a97432c
commit 1b51e88098
3 changed files with 55 additions and 16 deletions
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31
libpod/in_memory_state.go
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@ -14,16 +14,27 @@ import (
// An InMemoryState is a purely in-memory state store
type InMemoryState struct {
pods map[string]*Pod
containers map[string]*Container
ctrDepends map[string][]string
podContainers map[string]map[string]*Container
nameIndex *registrar.Registrar
idIndex *truncindex.TruncIndex
namespace string
// Maps pod ID to pod struct.
pods map[string]*Pod
// Maps container ID to container struct.
containers map[string]*Container
// Maps container ID to a list of IDs of dependencies.
ctrDepends map[string][]string
// Maps pod ID to a map of container ID to container struct.
podContainers map[string]map[string]*Container
// Global name registry - ensures name uniqueness and performs lookups.
nameIndex *registrar.Registrar
// Global ID registry - ensures ID uniqueness and performs lookups.
idIndex *truncindex.TruncIndex
// Namespace the state is joined to.
namespace string
// Maps namespace name to local ID and name registries for looking up
// pods and containers in a specific namespace.
namespaceIndexes map[string]*namespaceIndex
}
// namespaceIndex contains name and ID registries for a specific namespace.
// This is used for namespaces lookup operations.
type namespaceIndex struct {
nameIndex *registrar.Registrar
idIndex *truncindex.TruncIndex
@ -339,11 +350,7 @@ func (s *InMemoryState) ContainerInUse(ctr *Container) ([]string, error) {
func (s *InMemoryState) AllContainers() ([]*Container, error) {
ctrs := make([]*Container, 0, len(s.containers))
for _, ctr := range s.containers {
if s.namespace != "" {
if ctr.config.Namespace == s.namespace {
ctrs = append(ctrs, ctr)
}
} else {
if s.namespace == "" || ctr.config.Namespace == s.namespace {
ctrs = append(ctrs, ctr)
}
}