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[#131] registry: Allow to create cycled/forward selectors

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Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
This commit is contained in:
Dmitrii Stepanov 2024-03-19 17:18:22 +03:00
parent 2d26ac766f
commit 0c4e2665ba
8 changed files with 22 additions and 9 deletions
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2
cmd/xk6-registry-exporter/root.go
View file

@ -78,7 +78,7 @@ func rootCmdRun(cmd *cobra.Command, args []string) error {
}
objRegistry := registry.NewObjRegistry(cmd.Context(), args[0])
objSelector := registry.NewObjSelector(objRegistry, 0, &registry.ObjFilter{
objSelector := registry.NewObjSelector(objRegistry, 0, false, &registry.ObjFilter{
Status: status,
Age: age,
})

9
internal/registry/obj_selector.go
View file

@ -20,6 +20,7 @@ type ObjSelector struct {
boltDB *bbolt.DB
filter *ObjFilter
cacheSize int
looped bool
}
// objectSelectCache is the default maximum size of a batch to select from DB.
@ -27,7 +28,7 @@ const objectSelectCache = 1000
// NewObjSelector creates a new instance of object selector that can iterate over
// objects in the specified registry.
func NewObjSelector(registry *ObjRegistry, selectionSize int, filter *ObjFilter) *ObjSelector {
func NewObjSelector(registry *ObjRegistry, selectionSize int, looped bool, filter *ObjFilter) *ObjSelector {
if selectionSize <= 0 {
selectionSize = objectSelectCache
}
@ -40,6 +41,7 @@ func NewObjSelector(registry *ObjRegistry, selectionSize int, filter *ObjFilter)
filter: filter,
objChan: make(chan *ObjectInfo, selectionSize*2),
cacheSize: selectionSize,
looped: looped,
}
go objSelector.selectLoop()
@ -160,13 +162,16 @@ func (o *ObjSelector) selectLoop() {
}
}
if len(cache) != o.cacheSize {
if !o.looped && len(cache) != o.cacheSize {
// no more objects, wait a little; the logic could be improved.
select {
case <-time.After(time.Second):
case <-o.ctx.Done():
return
}
}
if o.looped && len(cache) != o.cacheSize {
lastID = 0
}

10
internal/registry/registry.go
View file

@ -75,6 +75,14 @@ func (r *Registry) open(dbFilePath string) *ObjRegistry {
}
func (r *Registry) GetSelector(dbFilePath string, name string, cacheSize int, filter map[string]string) *ObjSelector {
return r.getSelectorInternal(dbFilePath, name, cacheSize, false, filter)
}
func (r *Registry) GetLoopedSelector(dbFilePath string, name string, cacheSize int, filter map[string]string) *ObjSelector {
return r.getSelectorInternal(dbFilePath, name, cacheSize, true, filter)
}
func (r *Registry) getSelectorInternal(dbFilePath string, name string, cacheSize int, looped bool, filter map[string]string) *ObjSelector {
objFilter, err := parseFilter(filter)
if err != nil {
panic(err)
@ -86,7 +94,7 @@ func (r *Registry) GetSelector(dbFilePath string, name string, cacheSize int, fi
selector := r.root.selectors[name]
if selector == nil {
registry := r.open(dbFilePath)
selector = NewObjSelector(registry, cacheSize, objFilter)
selector = NewObjSelector(registry, cacheSize, looped, objFilter)
r.root.selectors[name] = selector
} else if !reflect.DeepEqual(selector.filter, objFilter) {
panic(fmt.Sprintf("selector %s already has been created with a different filter", name))

2
scenarios/grpc.js
View file

@ -57,7 +57,7 @@ if (registry_enabled && delete_age) {
const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
let obj_to_read_selector = undefined;
if (registry_enabled) {
obj_to_read_selector = registry.getSelector(
obj_to_read_selector = registry.getLoopedSelector(
__ENV.REGISTRY_FILE,
"obj_to_read",
__ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,

2
scenarios/grpc_car.js
View file

@ -57,7 +57,7 @@ if (registry_enabled && delete_age) {
const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
let obj_to_read_selector = undefined;
if (registry_enabled) {
obj_to_read_selector = registry.getSelector(
obj_to_read_selector = registry.getLoopedSelector(
__ENV.REGISTRY_FILE,
"obj_to_read",
__ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,

2
scenarios/s3.js
View file

@ -56,7 +56,7 @@ if (registry_enabled && delete_age) {
const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
let obj_to_read_selector = undefined;
if (registry_enabled) {
obj_to_read_selector = registry.getSelector(
obj_to_read_selector = registry.getLoopedSelector(
__ENV.REGISTRY_FILE,
"obj_to_read",
__ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,

2
scenarios/s3_car.js
View file

@ -56,7 +56,7 @@ if (registry_enabled && delete_age) {
const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
let obj_to_read_selector = undefined;
if (registry_enabled) {
obj_to_read_selector = registry.getSelector(
obj_to_read_selector = registry.getLoopedSelector(
__ENV.REGISTRY_FILE,
"obj_to_read",
__ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,

2
scenarios/s3local.js
View file

@ -54,7 +54,7 @@ const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : und
let obj_to_read_selector = undefined;
if (registry_enabled) {
obj_to_read_selector = registry.getSelector(
obj_to_read_selector = registry.getLoopedSelector(
__ENV.REGISTRY_FILE,
"obj_to_read",
__ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,