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enforcer_synced.go
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enforcer_synced.go
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// Copyright 2017 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package casbin
import (
"sync"
"sync/atomic"
"time"
"github.com/Knetic/govaluate"
"github.com/casbin/casbin/v2/persist"
)
// SyncedEnforcer wraps Enforcer and provides synchronized access
type SyncedEnforcer struct {
*Enforcer
m sync.RWMutex
stopAutoLoad chan struct{}
autoLoadRunning int32
}
// NewSyncedEnforcer creates a synchronized enforcer via file or DB.
func NewSyncedEnforcer(params ...interface{}) (*SyncedEnforcer, error) {
e := &SyncedEnforcer{}
var err error
e.Enforcer, err = NewEnforcer(params...)
if err != nil {
return nil, err
}
e.stopAutoLoad = make(chan struct{}, 1)
e.autoLoadRunning = 0
return e, nil
}
// IsAutoLoadingRunning check if SyncedEnforcer is auto loading policies
func (e *SyncedEnforcer) IsAutoLoadingRunning() bool {
return atomic.LoadInt32(&(e.autoLoadRunning)) != 0
}
// StartAutoLoadPolicy starts a go routine that will every specified duration call LoadPolicy
func (e *SyncedEnforcer) StartAutoLoadPolicy(d time.Duration) {
// Don't start another goroutine if there is already one running
if !atomic.CompareAndSwapInt32(&e.autoLoadRunning, 0, 1) {
return
}
ticker := time.NewTicker(d)
go func() {
defer func() {
ticker.Stop()
atomic.StoreInt32(&(e.autoLoadRunning), int32(0))
}()
n := 1
for {
select {
case <-ticker.C:
// error intentionally ignored
_ = e.LoadPolicy()
// Uncomment this line to see when the policy is loaded.
// log.Print("Load policy for time: ", n)
n++
case <-e.stopAutoLoad:
return
}
}
}()
}
// StopAutoLoadPolicy causes the go routine to exit.
func (e *SyncedEnforcer) StopAutoLoadPolicy() {
if e.IsAutoLoadingRunning() {
e.stopAutoLoad <- struct{}{}
}
}
// SetWatcher sets the current watcher.
func (e *SyncedEnforcer) SetWatcher(watcher persist.Watcher) error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.SetWatcher(watcher)
}
// LoadModel reloads the model from the model CONF file.
func (e *SyncedEnforcer) LoadModel() error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.LoadModel()
}
// ClearPolicy clears all policy.
func (e *SyncedEnforcer) ClearPolicy() {
e.m.Lock()
defer e.m.Unlock()
e.Enforcer.ClearPolicy()
}
// LoadPolicy reloads the policy from file/database.
func (e *SyncedEnforcer) LoadPolicy() error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.LoadPolicy()
}
// LoadFilteredPolicy reloads a filtered policy from file/database.
func (e *SyncedEnforcer) LoadFilteredPolicy(filter interface{}) error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.LoadFilteredPolicy(filter)
}
// LoadIncrementalFilteredPolicy reloads a filtered policy from file/database.
func (e *SyncedEnforcer) LoadIncrementalFilteredPolicy(filter interface{}) error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.LoadIncrementalFilteredPolicy(filter)
}
// SavePolicy saves the current policy (usually after changed with Casbin API) back to file/database.
func (e *SyncedEnforcer) SavePolicy() error {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.SavePolicy()
}
// BuildRoleLinks manually rebuild the role inheritance relations.
func (e *SyncedEnforcer) BuildRoleLinks() error {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.BuildRoleLinks()
}
// Enforce decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (sub, obj, act).
func (e *SyncedEnforcer) Enforce(rvals ...interface{}) (bool, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.Enforce(rvals...)
}
// EnforceWithMatcher use a custom matcher to decides whether a "subject" can access a "object" with the operation "action", input parameters are usually: (matcher, sub, obj, act), use model matcher by default when matcher is "".
func (e *SyncedEnforcer) EnforceWithMatcher(matcher string, rvals ...interface{}) (bool, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.EnforceWithMatcher(matcher, rvals...)
}
// EnforceEx explain enforcement by informing matched rules
func (e *SyncedEnforcer) EnforceEx(rvals ...interface{}) (bool, []string, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.EnforceEx(rvals...)
}
// EnforceExWithMatcher use a custom matcher and explain enforcement by informing matched rules
func (e *SyncedEnforcer) EnforceExWithMatcher(matcher string, rvals ...interface{}) (bool, []string, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.EnforceExWithMatcher(matcher, rvals...)
}
// BatchEnforce enforce in batches
func (e *SyncedEnforcer) BatchEnforce(requests [][]interface{}) ([]bool, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.BatchEnforce(requests)
}
// BatchEnforceWithMatcher enforce with matcher in batches
func (e *SyncedEnforcer) BatchEnforceWithMatcher(matcher string, requests [][]interface{}) ([]bool, error) {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.BatchEnforceWithMatcher(matcher, requests)
}
// GetAllSubjects gets the list of subjects that show up in the current policy.
func (e *SyncedEnforcer) GetAllSubjects() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllSubjects()
}
// GetAllNamedSubjects gets the list of subjects that show up in the current named policy.
func (e *SyncedEnforcer) GetAllNamedSubjects(ptype string) []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllNamedSubjects(ptype)
}
// GetAllObjects gets the list of objects that show up in the current policy.
func (e *SyncedEnforcer) GetAllObjects() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllObjects()
}
// GetAllNamedObjects gets the list of objects that show up in the current named policy.
func (e *SyncedEnforcer) GetAllNamedObjects(ptype string) []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllNamedObjects(ptype)
}
// GetAllActions gets the list of actions that show up in the current policy.
func (e *SyncedEnforcer) GetAllActions() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllActions()
}
// GetAllNamedActions gets the list of actions that show up in the current named policy.
func (e *SyncedEnforcer) GetAllNamedActions(ptype string) []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllNamedActions(ptype)
}
// GetAllRoles gets the list of roles that show up in the current policy.
func (e *SyncedEnforcer) GetAllRoles() []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllRoles()
}
// GetAllNamedRoles gets the list of roles that show up in the current named policy.
func (e *SyncedEnforcer) GetAllNamedRoles(ptype string) []string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetAllNamedRoles(ptype)
}
// GetPolicy gets all the authorization rules in the policy.
func (e *SyncedEnforcer) GetPolicy() [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetPolicy()
}
// GetFilteredPolicy gets all the authorization rules in the policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredPolicy(fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredPolicy(fieldIndex, fieldValues...)
}
// GetNamedPolicy gets all the authorization rules in the named policy.
func (e *SyncedEnforcer) GetNamedPolicy(ptype string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetNamedPolicy(ptype)
}
// GetFilteredNamedPolicy gets all the authorization rules in the named policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredNamedPolicy(ptype string, fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredNamedPolicy(ptype, fieldIndex, fieldValues...)
}
// GetGroupingPolicy gets all the role inheritance rules in the policy.
func (e *SyncedEnforcer) GetGroupingPolicy() [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetGroupingPolicy()
}
// GetFilteredGroupingPolicy gets all the role inheritance rules in the policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredGroupingPolicy(fieldIndex, fieldValues...)
}
// GetNamedGroupingPolicy gets all the role inheritance rules in the policy.
func (e *SyncedEnforcer) GetNamedGroupingPolicy(ptype string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetNamedGroupingPolicy(ptype)
}
// GetFilteredNamedGroupingPolicy gets all the role inheritance rules in the policy, field filters can be specified.
func (e *SyncedEnforcer) GetFilteredNamedGroupingPolicy(ptype string, fieldIndex int, fieldValues ...string) [][]string {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.GetFilteredNamedGroupingPolicy(ptype, fieldIndex, fieldValues...)
}
// HasPolicy determines whether an authorization rule exists.
func (e *SyncedEnforcer) HasPolicy(params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasPolicy(params...)
}
// HasNamedPolicy determines whether a named authorization rule exists.
func (e *SyncedEnforcer) HasNamedPolicy(ptype string, params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasNamedPolicy(ptype, params...)
}
// AddPolicy adds an authorization rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddPolicy(params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddPolicy(params...)
}
// AddPolicies adds authorization rules to the current policy.
// If the rule already exists, the function returns false for the corresponding rule and the rule will not be added.
// Otherwise the function returns true for the corresponding rule by adding the new rule.
func (e *SyncedEnforcer) AddPolicies(rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddPolicies(rules)
}
// AddNamedPolicy adds an authorization rule to the current named policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddNamedPolicy(ptype string, params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddNamedPolicy(ptype, params...)
}
// AddNamedPolicies adds authorization rules to the current named policy.
// If the rule already exists, the function returns false for the corresponding rule and the rule will not be added.
// Otherwise the function returns true for the corresponding by adding the new rule.
func (e *SyncedEnforcer) AddNamedPolicies(ptype string, rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddNamedPolicies(ptype, rules)
}
// RemovePolicy removes an authorization rule from the current policy.
func (e *SyncedEnforcer) RemovePolicy(params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemovePolicy(params...)
}
// UpdatePolicy updates an authorization rule from the current policy.
func (e *SyncedEnforcer) UpdatePolicy(oldPolicy []string, newPolicy []string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdatePolicy(oldPolicy, newPolicy)
}
func (e *SyncedEnforcer) UpdateNamedPolicy(ptype string, p1 []string, p2 []string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateNamedPolicy(ptype, p1, p2)
}
// UpdatePolicies updates authorization rules from the current policies.
func (e *SyncedEnforcer) UpdatePolicies(oldPolices [][]string, newPolicies [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdatePolicies(oldPolices, newPolicies)
}
func (e *SyncedEnforcer) UpdateNamedPolicies(ptype string, p1 [][]string, p2 [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateNamedPolicies(ptype, p1, p2)
}
func (e *SyncedEnforcer) UpdateFilteredPolicies(newPolicies [][]string, fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateFilteredPolicies(newPolicies, fieldIndex, fieldValues...)
}
func (e *SyncedEnforcer) UpdateFilteredNamedPolicies(ptype string, newPolicies [][]string, fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateFilteredNamedPolicies(ptype, newPolicies, fieldIndex, fieldValues...)
}
// RemovePolicies removes authorization rules from the current policy.
func (e *SyncedEnforcer) RemovePolicies(rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemovePolicies(rules)
}
// RemoveFilteredPolicy removes an authorization rule from the current policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredPolicy(fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredPolicy(fieldIndex, fieldValues...)
}
// RemoveNamedPolicy removes an authorization rule from the current named policy.
func (e *SyncedEnforcer) RemoveNamedPolicy(ptype string, params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveNamedPolicy(ptype, params...)
}
// RemoveNamedPolicies removes authorization rules from the current named policy.
func (e *SyncedEnforcer) RemoveNamedPolicies(ptype string, rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveNamedPolicies(ptype, rules)
}
// RemoveFilteredNamedPolicy removes an authorization rule from the current named policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredNamedPolicy(ptype string, fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredNamedPolicy(ptype, fieldIndex, fieldValues...)
}
// HasGroupingPolicy determines whether a role inheritance rule exists.
func (e *SyncedEnforcer) HasGroupingPolicy(params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasGroupingPolicy(params...)
}
// HasNamedGroupingPolicy determines whether a named role inheritance rule exists.
func (e *SyncedEnforcer) HasNamedGroupingPolicy(ptype string, params ...interface{}) bool {
e.m.RLock()
defer e.m.RUnlock()
return e.Enforcer.HasNamedGroupingPolicy(ptype, params...)
}
// AddGroupingPolicy adds a role inheritance rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddGroupingPolicy(params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddGroupingPolicy(params...)
}
// AddGroupingPolicies adds role inheritance rulea to the current policy.
// If the rule already exists, the function returns false for the corresponding policy rule and the rule will not be added.
// Otherwise the function returns true for the corresponding policy rule by adding the new rule.
func (e *SyncedEnforcer) AddGroupingPolicies(rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddGroupingPolicies(rules)
}
// AddNamedGroupingPolicy adds a named role inheritance rule to the current policy.
// If the rule already exists, the function returns false and the rule will not be added.
// Otherwise the function returns true by adding the new rule.
func (e *SyncedEnforcer) AddNamedGroupingPolicy(ptype string, params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddNamedGroupingPolicy(ptype, params...)
}
// AddNamedGroupingPolicies adds named role inheritance rules to the current policy.
// If the rule already exists, the function returns false for the corresponding policy rule and the rule will not be added.
// Otherwise the function returns true for the corresponding policy rule by adding the new rule.
func (e *SyncedEnforcer) AddNamedGroupingPolicies(ptype string, rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.AddNamedGroupingPolicies(ptype, rules)
}
// RemoveGroupingPolicy removes a role inheritance rule from the current policy.
func (e *SyncedEnforcer) RemoveGroupingPolicy(params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveGroupingPolicy(params...)
}
// RemoveGroupingPolicies removes role inheritance rules from the current policy.
func (e *SyncedEnforcer) RemoveGroupingPolicies(rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveGroupingPolicies(rules)
}
// RemoveFilteredGroupingPolicy removes a role inheritance rule from the current policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredGroupingPolicy(fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredGroupingPolicy(fieldIndex, fieldValues...)
}
// RemoveNamedGroupingPolicy removes a role inheritance rule from the current named policy.
func (e *SyncedEnforcer) RemoveNamedGroupingPolicy(ptype string, params ...interface{}) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveNamedGroupingPolicy(ptype, params...)
}
// RemoveNamedGroupingPolicies removes role inheritance rules from the current named policy.
func (e *SyncedEnforcer) RemoveNamedGroupingPolicies(ptype string, rules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveNamedGroupingPolicies(ptype, rules)
}
func (e *SyncedEnforcer) UpdateGroupingPolicy(oldRule []string, newRule []string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateGroupingPolicy(oldRule, newRule)
}
func (e *SyncedEnforcer) UpdateGroupingPolicies(oldRules [][]string, newRules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateGroupingPolicies(oldRules, newRules)
}
func (e *SyncedEnforcer) UpdateNamedGroupingPolicy(ptype string, oldRule []string, newRule []string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateNamedGroupingPolicy(ptype, oldRule, newRule)
}
func (e *SyncedEnforcer) UpdateNamedGroupingPolicies(ptype string, oldRules [][]string, newRules [][]string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.UpdateNamedGroupingPolicies(ptype, oldRules, newRules)
}
// RemoveFilteredNamedGroupingPolicy removes a role inheritance rule from the current named policy, field filters can be specified.
func (e *SyncedEnforcer) RemoveFilteredNamedGroupingPolicy(ptype string, fieldIndex int, fieldValues ...string) (bool, error) {
e.m.Lock()
defer e.m.Unlock()
return e.Enforcer.RemoveFilteredNamedGroupingPolicy(ptype, fieldIndex, fieldValues...)
}
// AddFunction adds a customized function.
func (e *SyncedEnforcer) AddFunction(name string, function govaluate.ExpressionFunction) {
e.m.Lock()
defer e.m.Unlock()
e.Enforcer.AddFunction(name, function)
}