Merge pull request #2 from masterSplinter01/feature/116-move-policy-from-neofs-node

Move policy from neofs node
remotes/fyrchik/master
Roman Khimov 2021-05-21 00:07:14 +03:00 committed by GitHub
commit 9dee13f0d5
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14 changed files with 1475 additions and 0 deletions

8
.gitignore vendored
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@ -13,3 +13,11 @@
# Dependency directories (remove the comment below to include it)
# vendor/
# IDE
.idea
.vscode
# coverage
coverage.txt
coverage.html

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.golangci.yml 100644
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@ -0,0 +1,59 @@
# This file contains all available configuration options
# with their default values.
# options for analysis running
run:
# timeout for analysis, e.g. 30s, 5m, default is 1m
timeout: 5m
# include test files or not, default is true
tests: true
# output configuration options
output:
# colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
format: tab
# all available settings of specific linters
linters-settings:
exhaustive:
# indicates that switch statements are to be considered exhaustive if a
# 'default' case is present, even if all enum members aren't listed in the
# switch
default-signifies-exhaustive: true
govet:
# report about shadowed variables
check-shadowing: false
linters:
enable:
# mandatory linters
- govet
- golint
# some default golangci-lint linters
- deadcode
- errcheck
- gosimple
- ineffassign
- staticcheck
- structcheck
- typecheck
- unused
- varcheck
# extra linters
- exhaustive
- godot
- gofmt
- whitespace
- goimports
disable-all: true
fast: false
issues:
include:
- EXC0002 # should have a comment
- EXC0003 # test/Test ... consider calling this
- EXC0004 # govet
- EXC0005 # C-style breaks

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Makefile 100644
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@ -0,0 +1,40 @@
#!/usr/bin/make -f
# Run tests
test:
@go test ./... -cover
# Pull go dependencies
dep:
@printf "⇒ Download requirements: "
@CGO_ENABLED=0 \
go mod download && echo OK
@printf "⇒ Tidy requirements: "
@CGO_ENABLED=0 \
go mod tidy -v && echo OK
# Run linters
lint:
@golangci-lint --timeout=5m run
# Run tests with race detection and produce coverage output
cover:
@go test -v -race ./... -coverprofile=coverage.txt -covermode=atomic
@go tool cover -html=coverage.txt -o coverage.html
# Reformat code
format:
@echo "⇒ Processing gofmt check"
@gofmt -s -w ./
@echo "⇒ Processing goimports check"
@goimports -w ./
# Show this help prompt
help:
@echo ' Usage:'
@echo ''
@echo ' make <target>'
@echo ''
@echo ' Targets:'
@echo ''
@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9_-]+ ?:/{ print " ", $$1, comment }' $(MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort -u

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go.mod 100644
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module github.com/nspcc-dev/neofs-sdk-go
go 1.16
require (
github.com/alecthomas/participle v0.7.1
github.com/nspcc-dev/neofs-api-go v1.26.1
github.com/stretchr/testify v1.6.1
)

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go.sum 100644
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@ -0,0 +1,278 @@
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github.com/CityOfZion/neo-go v0.70.1-pre.0.20191209120015-fccb0085941e/go.mod h1:0enZl0az8xA6PVkwzEOwPWVJGqlt/GO4hA4kmQ5Xzig=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
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golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20180318012157-96caea41033d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55 h1:gSJIx1SDwno+2ElGhA4+qG2zF97qiUzTM+rQ0klBOcE=
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.29.1 h1:EC2SB8S04d2r73uptxphDSUG+kTKVgjRPF+N3xpxRB4=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
gopkg.in/abiosoft/ishell.v2 v2.0.0/go.mod h1:sFp+cGtH6o4s1FtpVPTMcHq2yue+c4DGOVohJCPUzwY=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

20
pkg/policy/doc.go 100644
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// Package policy provides facilities for creating policy from SQL-like language.
// eBNF grammar is provided in `grammar.ebnf` for illustration.
//
// Current limitations:
// 1. Grouping filter expressions in parenthesis is not supported right now.
// Requiring this will make query too verbose, making it optional makes
// our grammar not LL(1). This can be supported in future.
// 2. Filters must be defined before they are used.
// This requirement may be relaxed in future.
//
// Example query:
// REP 1 in SPB
// REP 2 in Americas
// CBF 4
// SELECT 1 Node IN City FROM SPBSSD AS SPB
// SELECT 2 Node IN SAME City FROM Americas AS Americas
// FILTER SSD EQ true AS IsSSD
// FILTER @IsSSD AND Country eq "RU" AND City eq "St.Petersburg" AS SPBSSD
// FILTER 'Continent' == 'North America' OR Continent == 'South America' AS Americas
package policy

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@ -0,0 +1,141 @@
package policy
import (
"fmt"
"strconv"
"strings"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
)
// Encode parses data of PlacementPolicy to a string.
func Encode(p *netmap.PlacementPolicy) []string {
if p == nil {
return nil
}
var (
replicas = p.Replicas()
selectors = p.Selectors()
filters = p.Filters()
)
// 1 for container backup factor
result := make([]string, 0, len(replicas)+len(selectors)+len(filters)+1)
// first print replicas
encodeReplicas(replicas, &result)
// then backup factor
if backupFactor := p.ContainerBackupFactor(); backupFactor != 0 {
result = append(result, fmt.Sprintf("CBF %d", backupFactor))
}
// then selectors
encodeSelectors(selectors, &result)
// then filters
encodeFilters(filters, &result)
return result
}
func encodeReplicas(replicas []*netmap.Replica, dst *[]string) {
builder := new(strings.Builder)
for _, replica := range replicas {
builder.WriteString("REP ")
builder.WriteString(strconv.FormatUint(uint64(replica.Count()), 10))
if s := replica.Selector(); s != "" {
builder.WriteString(" IN ")
builder.WriteString(s)
}
*dst = append(*dst, builder.String())
builder.Reset()
}
}
func encodeSelectors(selectors []*netmap.Selector, dst *[]string) {
builder := new(strings.Builder)
for _, selector := range selectors {
builder.WriteString("SELECT ")
builder.WriteString(strconv.FormatUint(uint64(selector.Count()), 10))
if a := selector.Attribute(); a != "" {
builder.WriteString(" IN")
switch selector.Clause() {
case netmap.ClauseSame:
builder.WriteString(" SAME ")
case netmap.ClauseDistinct:
builder.WriteString(" DISTINCT ")
default:
builder.WriteString(" ")
}
builder.WriteString(a)
}
if f := selector.Filter(); f != "" {
builder.WriteString(" FROM ")
builder.WriteString(f)
}
if n := selector.Name(); n != "" {
builder.WriteString(" AS ")
builder.WriteString(n)
}
*dst = append(*dst, builder.String())
builder.Reset()
}
}
func encodeFilters(filters []*netmap.Filter, dst *[]string) {
builder := new(strings.Builder)
for _, filter := range filters {
builder.WriteString("FILTER ")
builder.WriteString(encodeFilter(filter))
*dst = append(*dst, builder.String())
builder.Reset()
}
}
func encodeFilter(filter *netmap.Filter) string {
builder := new(strings.Builder)
unspecified := filter.Operation() == 0
if k := filter.Key(); k != "" {
builder.WriteString(k)
builder.WriteString(" ")
builder.WriteString(filter.Operation().String())
builder.WriteString(" ")
builder.WriteString(filter.Value())
} else if n := filter.Name(); unspecified && n != "" {
builder.WriteString("@")
builder.WriteString(n)
}
for i, subfilter := range filter.InnerFilters() {
if i != 0 {
builder.WriteString(" ")
builder.WriteString(filter.Operation().String())
builder.WriteString(" ")
}
builder.WriteString(encodeFilter(subfilter))
}
if n := filter.Name(); n != "" && !unspecified {
builder.WriteString(" AS ")
builder.WriteString(n)
}
return builder.String()
}

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@ -0,0 +1,36 @@
package policy_test
import (
"fmt"
"strings"
"testing"
"github.com/nspcc-dev/neofs-sdk-go/pkg/policy"
"github.com/stretchr/testify/require"
)
func TestEncode(t *testing.T) {
testCases := []string{
`REP 1 IN X
CBF 1
SELECT 2 IN SAME Location FROM * AS X`,
`REP 1
SELECT 2 IN City FROM Good
FILTER Country EQ RU AS FromRU
FILTER @FromRU AND Rating GT 7 AS Good`,
`REP 7 IN SPB
SELECT 1 IN City FROM SPBSSD AS SPB
FILTER City EQ SPB AND SSD EQ true OR City EQ SPB AND Rating GE 5 AS SPBSSD`,
}
for _, testCase := range testCases {
q, err := policy.Parse(testCase)
require.NoError(t, err)
got := policy.Encode(q)
fmt.Println(strings.Join(got, "\n"))
require.Equal(t, testCase, strings.Join(got, "\n"))
}
}

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@ -0,0 +1,55 @@
Policy ::=
RepStmt, [RepStmt],
CbtStmt?,
[SelectStmt],
[FilterStmt],
;
RepStmt ::=
'REP', Number1, (* number of object replicas *)
('AS', Ident)? (* optional selector name *)
;
CbtStmt ::= 'CBF', Number1 (* container backup factor *)
;
SelectStmt ::=
'SELECT', Number1, (* number of nodes to select without container backup factor *)
('IN', Clause?, Ident)?, (* bucket name *)
FROM, (Ident | '*'), (* filter reference or whole netmap *)
('AS', Ident)? (* optional selector name *)
;
Clause ::=
'SAME' (* nodes from the same bucket *)
| 'DISTINCT' (* nodes from distinct buckets *)
;
FilterStmt ::=
'FILTER', AndChain, ['OR', AndChain],
'AS', Ident (* obligatory filter name *)
;
AndChain ::=
Expr, ['AND', Expr]
;
Expr ::=
'@' Ident (* filter reference *)
| Key, Op, Value (* attribute filter *)
;
Op ::= 'EQ' | 'NE' | 'GE' | 'GT' | 'LT' | 'LE'
;
Key ::= Ident | String
;
Value ::= Ident | Number | String
;
Number1 ::= Digit1 [Digit];
Number ::= Digit [Digit];
Digit1 ::= '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' ;
Digit ::= '0' | Digit1;

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@ -0,0 +1,60 @@
//nolint:govet,golint // fails on struct tags here, but participle needs this syntax
package policy
import (
"github.com/alecthomas/participle"
)
var parser *participle.Parser
func init() {
p, err := participle.Build(&query{})
if err != nil {
panic(err)
}
parser = p
}
type query struct {
Replicas []*replicaStmt `@@+`
CBF uint32 `("CBF" @Int)?`
Selectors []*selectorStmt `@@*`
Filters []*filterStmt `@@*`
}
type replicaStmt struct {
Count int `"REP" @Int`
Selector string `("IN" @Ident)?`
}
type selectorStmt struct {
Count uint32 `"SELECT" @Int`
Bucket []string `("IN" @(("SAME" | "DISTINCT")? Ident))?`
Filter string `"FROM" @(Ident | "*")`
Name string `("AS" @Ident)?`
}
type filterStmt struct {
Value *orChain `"FILTER" @@`
Name string `"AS" @Ident`
}
type filterOrExpr struct {
Reference string `"@"@Ident`
Expr *simpleExpr `| @@`
}
type orChain struct {
Clauses []*andChain `@@ ("OR" @@)*`
}
type andChain struct {
Clauses []*filterOrExpr `@@ ("AND" @@)*`
}
type simpleExpr struct {
Key string `@(Ident | String)`
// We don't use literals here to improve error messages.
Op string `@Ident`
Value string `@(Ident | String | Int)`
}

225
pkg/policy/json.go 100644
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@ -0,0 +1,225 @@
package policy
import (
"encoding/json"
"fmt"
"strings"
"github.com/nspcc-dev/neofs-api-go/v2/netmap"
)
type (
filter struct {
Name string `json:"name,omitempty"`
Key string `json:"key,omitempty"`
Op string `json:"op,omitempty"`
Value string `json:"value,omitempty"`
Filters []filter `json:"filters,omitempty"`
}
replica struct {
Count uint32 `json:"count"`
Selector string `json:"selector,omitempty"`
}
selector struct {
Count uint32 `json:"count"`
Attribute string `json:"attribute"`
Filter string `json:"filter,omitempty"`
Name string `json:"name,omitempty"`
Clause string `json:"clause,omitempty"`
}
placement struct {
Replicas []replica `json:"replicas"`
CBF uint32 `json:"container_backup_factor,omitempty"`
Selectors []selector `json:"selectors,omitempty"`
Filters []filter `json:"filters,omitempty"`
}
)
// ToJSON converts placement policy to JSON.
func ToJSON(np *netmap.PlacementPolicy) ([]byte, error) {
p := new(placement)
p.CBF = np.GetContainerBackupFactor()
p.Filters = make([]filter, len(np.GetFilters()))
for i, f := range np.GetFilters() {
p.Filters[i].fromNetmap(f)
}
p.Selectors = make([]selector, len(np.GetSelectors()))
for i, s := range np.GetSelectors() {
p.Selectors[i].fromNetmap(s)
}
p.Replicas = make([]replica, len(np.GetReplicas()))
for i, r := range np.GetReplicas() {
p.Replicas[i].fromNetmap(r)
}
return json.Marshal(p)
}
// FromJSON creates placement policy from JSON.
func FromJSON(data []byte) (*netmap.PlacementPolicy, error) {
p := new(placement)
if err := json.Unmarshal(data, p); err != nil {
return nil, err
}
rs := make([]*netmap.Replica, len(p.Replicas))
for i := range p.Replicas {
rs[i] = p.Replicas[i].toNetmap()
}
var fs []*netmap.Filter
if len(p.Filters) != 0 {
fs = make([]*netmap.Filter, len(p.Filters))
for i := range p.Filters {
f, err := p.Filters[i].toNetmap()
if err != nil {
return nil, err
}
fs[i] = f
}
}
var ss []*netmap.Selector
if len(p.Selectors) != 0 {
ss = make([]*netmap.Selector, len(p.Selectors))
for i := range p.Selectors {
s, err := p.Selectors[i].toNetmap()
if err != nil {
return nil, err
}
ss[i] = s
}
}
pp := new(netmap.PlacementPolicy)
pp.SetReplicas(rs)
pp.SetContainerBackupFactor(p.CBF)
pp.SetFilters(fs)
pp.SetSelectors(ss)
return pp, nil
}
func (r *replica) toNetmap() *netmap.Replica {
nr := new(netmap.Replica)
nr.SetCount(r.Count)
nr.SetSelector(r.Selector)
return nr
}
func (r *replica) fromNetmap(nr *netmap.Replica) {
r.Count = nr.GetCount()
r.Selector = nr.GetSelector()
}
func (f *filter) toNetmap() (*netmap.Filter, error) {
var op netmap.Operation
switch strings.ToUpper(f.Op) {
case "EQ":
op = netmap.EQ
case "NE":
op = netmap.NE
case "GT":
op = netmap.GT
case "GE":
op = netmap.GE
case "LT":
op = netmap.LT
case "LE":
op = netmap.LE
case "AND":
op = netmap.AND
case "OR":
op = netmap.OR
case "":
op = netmap.UnspecifiedOperation
default:
return nil, fmt.Errorf("%w: '%s'", ErrUnknownOp, f.Op)
}
var fs []*netmap.Filter
if len(f.Filters) != 0 {
fs = make([]*netmap.Filter, len(f.Filters))
for i := range f.Filters {
var err error
fs[i], err = f.Filters[i].toNetmap()
if err != nil {
return nil, err
}
}
}
nf := new(netmap.Filter)
nf.SetFilters(fs)
nf.SetOp(op)
nf.SetName(f.Name)
nf.SetValue(f.Value)
nf.SetKey(f.Key)
return nf, nil
}
func (f *filter) fromNetmap(nf *netmap.Filter) {
f.Name = nf.GetName()
f.Key = nf.GetKey()
f.Value = nf.GetValue()
switch nf.GetOp() {
case netmap.EQ:
f.Op = "EQ"
case netmap.NE:
f.Op = "NE"
case netmap.GT:
f.Op = "GT"
case netmap.GE:
f.Op = "GE"
case netmap.LT:
f.Op = "LT"
case netmap.LE:
f.Op = "LE"
case netmap.AND:
f.Op = "AND"
case netmap.OR:
f.Op = "OR"
default:
// do nothing
}
if nf.GetFilters() != nil {
f.Filters = make([]filter, len(nf.GetFilters()))
for i, sf := range nf.GetFilters() {
f.Filters[i].fromNetmap(sf)
}
}
}
func (s *selector) toNetmap() (*netmap.Selector, error) {
var c netmap.Clause
switch strings.ToUpper(s.Clause) {
case "SAME":
c = netmap.Same
case "DISTINCT":
c = netmap.Distinct
case "":
default:
return nil, fmt.Errorf("%w: '%s'", ErrUnknownClause, s.Clause)
}
ns := new(netmap.Selector)
ns.SetName(s.Name)
ns.SetAttribute(s.Attribute)
ns.SetCount(s.Count)
ns.SetClause(c)
ns.SetFilter(s.Filter)
return ns, nil
}
func (s *selector) fromNetmap(ns *netmap.Selector) {
s.Name = ns.GetName()
s.Filter = ns.GetFilter()
s.Count = ns.GetCount()
s.Attribute = ns.GetAttribute()
switch ns.GetClause() {
case netmap.Same:
s.Clause = "same"
case netmap.Distinct:
s.Clause = "distinct"
default:
// do nothing
}
s.Name = ns.GetName()
}

View File

@ -0,0 +1,84 @@
package policy
import (
"testing"
"github.com/nspcc-dev/neofs-api-go/v2/netmap"
"github.com/stretchr/testify/require"
)
func TestToJSON(t *testing.T) {
check := func(t *testing.T, p *netmap.PlacementPolicy, json string) {
data, err := ToJSON(p)
require.NoError(t, err)
require.JSONEq(t, json, string(data))
np, err := FromJSON(data)
require.NoError(t, err)
require.Equal(t, p, np)
}
t.Run("SimpleREP", func(t *testing.T) {
p := new(netmap.PlacementPolicy)
p.SetReplicas([]*netmap.Replica{newReplica("", 3)})
check(t, p, `{"replicas":[{"count":3}]}`)
})
t.Run("REPWithCBF", func(t *testing.T) {
p := new(netmap.PlacementPolicy)
p.SetReplicas([]*netmap.Replica{newReplica("", 3)})
p.SetContainerBackupFactor(3)
check(t, p, `{"replicas":[{"count":3}],"container_backup_factor":3}`)
})
t.Run("REPFromSelector", func(t *testing.T) {
p := new(netmap.PlacementPolicy)
p.SetReplicas([]*netmap.Replica{newReplica("Nodes", 3)})
p.SetContainerBackupFactor(3)
p.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.Distinct, "City", "", "Nodes"),
})
check(t, p, `{
"replicas":[{"count":3,"selector":"Nodes"}],
"container_backup_factor":3,
"selectors": [{
"name":"Nodes",
"attribute":"City",
"clause":"distinct",
"count":1
}]}`)
})
t.Run("FilterOps", func(t *testing.T) {
p := new(netmap.PlacementPolicy)
p.SetReplicas([]*netmap.Replica{newReplica("Nodes", 3)})
p.SetContainerBackupFactor(3)
p.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.Same, "City", "Good", "Nodes"),
})
p.SetFilters([]*netmap.Filter{
newFilter("GoodRating", "Rating", "5", netmap.GE),
newFilter("Good", "", "", netmap.OR,
newFilter("GoodRating", "", "", netmap.UnspecifiedOperation),
newFilter("", "Attr1", "Val1", netmap.EQ),
newFilter("", "Attr2", "Val2", netmap.NE),
newFilter("", "", "", netmap.AND,
newFilter("", "Attr4", "2", netmap.LT),
newFilter("", "Attr5", "3", netmap.LE)),
newFilter("", "Attr3", "1", netmap.GT)),
})
check(t, p, `{
"replicas":[{"count":3,"selector":"Nodes"}],
"container_backup_factor":3,
"selectors": [{"name":"Nodes","attribute":"City","clause":"same","count":1,"filter":"Good"}],
"filters": [
{"name":"GoodRating","key":"Rating","op":"GE","value":"5"},
{"name":"Good","op":"OR","filters":[
{"name":"GoodRating"},
{"key":"Attr1","op":"EQ","value":"Val1"},
{"key":"Attr2","op":"NE","value":"Val2"},
{"op":"AND","filters":[
{"key":"Attr4","op":"LT","value":"2"},
{"key":"Attr5","op":"LE","value":"3"}
]},
{"key":"Attr3","op":"GT","value":"1"}
]}
]}`)
})
}

178
pkg/policy/query.go 100644
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package policy
import (
"errors"
"fmt"
"strings"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
)
var (
// ErrInvalidNumber is returned when a value of SELECT is 0.
ErrInvalidNumber = errors.New("policy: expected positive integer")
// ErrUnknownClause is returned when a statement(clause) in a query is unknown.
ErrUnknownClause = errors.New("policy: unknown clause")
// ErrUnknownOp is returned when an operation in a query is unknown.
ErrUnknownOp = errors.New("policy: unknown operation")
// ErrUnknownFilter is returned when a value of FROM in a query is unknown.
ErrUnknownFilter = errors.New("policy: filter not found")
// ErrUnknownSelector is returned when a value of IN is unknown.
ErrUnknownSelector = errors.New("policy: selector not found")
)
func parse(s string) (*query, error) {
q := new(query)
err := parser.Parse(strings.NewReader(s), q)
if err != nil {
return nil, err
}
return q, nil
}
// Parse parses s into a placement policy.
func Parse(s string) (*netmap.PlacementPolicy, error) {
q, err := parse(s)
if err != nil {
return nil, err
}
seenFilters := map[string]bool{}
fs := make([]*netmap.Filter, 0, len(q.Filters))
for _, qf := range q.Filters {
f, err := filterFromOrChain(qf.Value, seenFilters)
if err != nil {
return nil, err
}
f.SetName(qf.Name)
fs = append(fs, f)
seenFilters[qf.Name] = true
}
seenSelectors := map[string]bool{}
ss := make([]*netmap.Selector, 0, len(q.Selectors))
for _, qs := range q.Selectors {
if qs.Filter != netmap.MainFilterName && !seenFilters[qs.Filter] {
return nil, fmt.Errorf("%w: '%s'", ErrUnknownFilter, qs.Filter)
}
s := netmap.NewSelector()
switch len(qs.Bucket) {
case 1: // only bucket
s.SetAttribute(qs.Bucket[0])
case 2: // clause + bucket
s.SetClause(clauseFromString(qs.Bucket[0]))
s.SetAttribute(qs.Bucket[1])
}
s.SetName(qs.Name)
seenSelectors[qs.Name] = true
s.SetFilter(qs.Filter)
if qs.Count == 0 {
return nil, fmt.Errorf("%w: SELECT", ErrInvalidNumber)
}
s.SetCount(qs.Count)
ss = append(ss, s)
}
rs := make([]*netmap.Replica, 0, len(q.Replicas))
for _, qr := range q.Replicas {
r := netmap.NewReplica()
if qr.Selector != "" {
if !seenSelectors[qr.Selector] {
return nil, fmt.Errorf("%w: '%s'", ErrUnknownSelector, qr.Selector)
}
r.SetSelector(qr.Selector)
}
if qr.Count == 0 {
return nil, fmt.Errorf("%w: REP", ErrInvalidNumber)
}
r.SetCount(uint32(qr.Count))
rs = append(rs, r)
}
p := new(netmap.PlacementPolicy)
p.SetFilters(fs...)
p.SetSelectors(ss...)
p.SetReplicas(rs...)
p.SetContainerBackupFactor(q.CBF)
return p, nil
}
func clauseFromString(s string) netmap.Clause {
switch strings.ToUpper(s) {
case "SAME":
return netmap.ClauseSame
case "DISTINCT":
return netmap.ClauseDistinct
default:
return 0
}
}
func filterFromOrChain(expr *orChain, seen map[string]bool) (*netmap.Filter, error) {
var fs []*netmap.Filter
for _, ac := range expr.Clauses {
f, err := filterFromAndChain(ac, seen)
if err != nil {
return nil, err
}
fs = append(fs, f)
}
if len(fs) == 1 {
return fs[0], nil
}
f := netmap.NewFilter()
f.SetOperation(netmap.OpOR)
f.SetInnerFilters(fs...)
return f, nil
}
func filterFromAndChain(expr *andChain, seen map[string]bool) (*netmap.Filter, error) {
var fs []*netmap.Filter
for _, fe := range expr.Clauses {
var f *netmap.Filter
var err error
if fe.Expr != nil {
f, err = filterFromSimpleExpr(fe.Expr, seen)
} else {
f = netmap.NewFilter()
f.SetName(fe.Reference)
}
if err != nil {
return nil, err
}
fs = append(fs, f)
}
if len(fs) == 1 {
return fs[0], nil
}
f := netmap.NewFilter()
f.SetOperation(netmap.OpAND)
f.SetInnerFilters(fs...)
return f, nil
}
func filterFromSimpleExpr(se *simpleExpr, seen map[string]bool) (*netmap.Filter, error) {
f := netmap.NewFilter()
f.SetKey(se.Key)
switch se.Op {
case "EQ":
f.SetOperation(netmap.OpEQ)
case "NE":
f.SetOperation(netmap.OpNE)
case "GE":
f.SetOperation(netmap.OpGE)
case "GT":
f.SetOperation(netmap.OpGT)
case "LE":
f.SetOperation(netmap.OpLE)
case "LT":
f.SetOperation(netmap.OpLT)
default:
return nil, fmt.Errorf("%w: '%s'", ErrUnknownOp, se.Op)
}
f.SetValue(se.Value)
return f, nil
}

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@ -0,0 +1,282 @@
package policy
import (
"errors"
"testing"
"github.com/nspcc-dev/neofs-api-go/v2/netmap"
"github.com/stretchr/testify/require"
)
func TestSimple(t *testing.T) {
q := `REP 3`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{})
expected.SetSelectors([]*netmap.Selector{})
expected.SetReplicas([]*netmap.Replica{newReplica("", 3)})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestSimpleWithHRWB(t *testing.T) {
q := `REP 3 CBF 4`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{})
expected.SetSelectors([]*netmap.Selector{})
expected.SetReplicas([]*netmap.Replica{newReplica("", 3)})
expected.SetContainerBackupFactor(4)
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestFromSelect(t *testing.T) {
q := `REP 1 IN SPB
SELECT 1 IN City FROM * AS SPB`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{})
expected.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.UnspecifiedClause, "City", "*", "SPB"),
})
expected.SetReplicas([]*netmap.Replica{newReplica("SPB", 1)})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
// https://github.com/nspcc-dev/neofs-node/issues/46
func TestFromSelectNoAttribute(t *testing.T) {
t.Run("Simple", func(t *testing.T) {
q := `REP 2
SELECT 6 FROM *`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{})
expected.SetSelectors([]*netmap.Selector{newSelector(6, netmap.UnspecifiedClause, "", "*", "")})
expected.SetReplicas([]*netmap.Replica{newReplica("", 2)})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
})
t.Run("with filter", func(t *testing.T) {
q := `REP 2
SELECT 6 FROM F
FILTER StorageType EQ SSD AS F`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{newFilter("F", "StorageType", "SSD", netmap.EQ)})
expected.SetSelectors([]*netmap.Selector{newSelector(6, netmap.UnspecifiedClause, "", "F", "")})
expected.SetReplicas([]*netmap.Replica{newReplica("", 2)})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
})
}
func TestFromSelectClause(t *testing.T) {
q := `REP 4
SELECT 3 IN Country FROM *
SELECT 2 IN SAME City FROM *
SELECT 1 IN DISTINCT Continent FROM *`
expected := new(netmap.PlacementPolicy)
expected.SetFilters([]*netmap.Filter{})
expected.SetSelectors([]*netmap.Selector{
newSelector(3, netmap.UnspecifiedClause, "Country", "*", ""),
newSelector(2, netmap.Same, "City", "*", ""),
newSelector(1, netmap.Distinct, "Continent", "*", ""),
})
expected.SetReplicas([]*netmap.Replica{newReplica("", 4)})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestSimpleFilter(t *testing.T) {
q := `REP 1
SELECT 1 IN City FROM Good
FILTER Rating GT 7 AS Good`
expected := new(netmap.PlacementPolicy)
expected.SetReplicas([]*netmap.Replica{newReplica("", 1)})
expected.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.UnspecifiedClause, "City", "Good", ""),
})
expected.SetFilters([]*netmap.Filter{
newFilter("Good", "Rating", "7", netmap.GT),
})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestFilterReference(t *testing.T) {
q := `REP 1
SELECT 2 IN City FROM Good
FILTER Country EQ "RU" AS FromRU
FILTER @FromRU AND Rating GT 7 AS Good`
expected := new(netmap.PlacementPolicy)
expected.SetReplicas([]*netmap.Replica{newReplica("", 1)})
expected.SetSelectors([]*netmap.Selector{
newSelector(2, netmap.UnspecifiedClause, "City", "Good", ""),
})
expected.SetFilters([]*netmap.Filter{
newFilter("FromRU", "Country", "RU", netmap.EQ),
newFilter("Good", "", "", netmap.AND,
newFilter("FromRU", "", "", netmap.UnspecifiedOperation),
newFilter("", "Rating", "7", netmap.GT)),
})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestFilterOps(t *testing.T) {
q := `REP 1
SELECT 2 IN City FROM Good
FILTER A GT 1 AND B GE 2 AND C LT 3 AND D LE 4
AND E EQ 5 AND F NE 6 AS Good`
expected := new(netmap.PlacementPolicy)
expected.SetReplicas([]*netmap.Replica{newReplica("", 1)})
expected.SetSelectors([]*netmap.Selector{
newSelector(2, netmap.UnspecifiedClause, "City", "Good", ""),
})
expected.SetFilters([]*netmap.Filter{
newFilter("Good", "", "", netmap.AND,
newFilter("", "A", "1", netmap.GT),
newFilter("", "B", "2", netmap.GE),
newFilter("", "C", "3", netmap.LT),
newFilter("", "D", "4", netmap.LE),
newFilter("", "E", "5", netmap.EQ),
newFilter("", "F", "6", netmap.NE)),
})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestWithFilterPrecedence(t *testing.T) {
q := `REP 7 IN SPB
SELECT 1 IN City FROM SPBSSD AS SPB
FILTER City EQ "SPB" AND SSD EQ true OR City EQ "SPB" AND Rating GE 5 AS SPBSSD`
expected := new(netmap.PlacementPolicy)
expected.SetReplicas([]*netmap.Replica{newReplica("SPB", 7)})
expected.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.UnspecifiedClause, "City", "SPBSSD", "SPB"),
})
expected.SetFilters([]*netmap.Filter{
newFilter("SPBSSD", "", "", netmap.OR,
newFilter("", "", "", netmap.AND,
newFilter("", "City", "SPB", netmap.EQ),
newFilter("", "SSD", "true", netmap.EQ)),
newFilter("", "", "", netmap.AND,
newFilter("", "City", "SPB", netmap.EQ),
newFilter("", "Rating", "5", netmap.GE))),
})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func TestValidation(t *testing.T) {
t.Run("MissingSelector", func(t *testing.T) {
q := `REP 3 IN RU`
_, err := Parse(q)
require.True(t, errors.Is(err, ErrUnknownSelector), "got: %v", err)
})
t.Run("MissingFilter", func(t *testing.T) {
q := `REP 3
SELECT 1 IN City FROM MissingFilter`
_, err := Parse(q)
require.True(t, errors.Is(err, ErrUnknownFilter), "got: %v", err)
})
t.Run("UnknownOp", func(t *testing.T) {
q := `REP 3
SELECT 1 IN City FROM F
FILTER Country KEK RU AS F`
_, err := Parse(q)
require.True(t, errors.Is(err, ErrUnknownOp), "got: %v", err)
})
t.Run("TypoInREP", func(t *testing.T) {
q := `REK 3`
_, err := Parse(q)
require.Error(t, err)
})
t.Run("InvalidFilterName", func(t *testing.T) {
q := `REP 3
SELECT 1 IN City FROM F
FILTER Good AND Country EQ RU AS F
FILTER Rating EQ 5 AS Good`
_, err := Parse(q)
require.Error(t, err)
})
t.Run("InvalidNumberInREP", func(t *testing.T) {
q := `REP 0`
_, err := Parse(q)
require.True(t, errors.Is(err, ErrInvalidNumber), "got: %v", err)
})
t.Run("InvalidNumberInREP", func(t *testing.T) {
q := `REP 1 IN Good
SELECT 0 IN City FROM *`
_, err := Parse(q)
require.True(t, errors.Is(err, ErrInvalidNumber), "got: %v", err)
})
}
func TestFilterStringSymbols(t *testing.T) {
q := `REP 1 IN S
SELECT 1 FROM F AS S
FILTER "UN-LOCODE" EQ "RU LED" AS F`
expected := new(netmap.PlacementPolicy)
expected.SetReplicas([]*netmap.Replica{
newReplica("S", 1),
})
expected.SetSelectors([]*netmap.Selector{
newSelector(1, netmap.UnspecifiedClause, "", "F", "S"),
})
expected.SetFilters([]*netmap.Filter{
newFilter("F", "UN-LOCODE", "RU LED", netmap.EQ),
})
r, err := Parse(q)
require.NoError(t, err)
require.EqualValues(t, expected, r)
}
func newFilter(name, key, value string, op netmap.Operation, sub ...*netmap.Filter) *netmap.Filter {
f := new(netmap.Filter)
f.SetName(name)
f.SetKey(key)
f.SetValue(value)
f.SetOp(op)
f.SetFilters(sub)
return f
}
func newReplica(s string, c uint32) *netmap.Replica {
r := new(netmap.Replica)
r.SetSelector(s)
r.SetCount(c)
return r
}
func newSelector(count uint32, c netmap.Clause, attr, f, name string) *netmap.Selector {
s := new(netmap.Selector)
s.SetCount(count)
s.SetClause(c)
s.SetAttribute(attr)
s.SetFilter(f)
s.SetName(name)
return s
}