github.com/polarismesh/polaris@v1.17.8/plugin/whitelist.go (about)

     1  /**
     2   * Tencent is pleased to support the open source community by making Polaris available.
     3   *
     4   * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
     5   *
     6   * Licensed under the BSD 3-Clause License (the "License");
     7   * you may not use this file except in compliance with the License.
     8   * You may obtain a copy of the License at
     9   *
    10   * https://opensource.org/licenses/BSD-3-Clause
    11   *
    12   * Unless required by applicable law or agreed to in writing, software distributed
    13   * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
    14   * CONDITIONS OF ANY KIND, either express or implied. See the License for the
    15   * specific language governing permissions and limitations under the License.
    16   */
    17  
    18  package plugin
    19  
    20  import (
    21  	"os"
    22  	"sync"
    23  )
    24  
    25  var (
    26  	whitelistOnce sync.Once
    27  )
    28  
    29  // Whitelist White list interface
    30  type Whitelist interface {
    31  	Plugin
    32  
    33  	Contain(entry interface{}) bool
    34  }
    35  
    36  // GetWhitelist Get the whitelist plugin
    37  func GetWhitelist() Whitelist {
    38  	c := &config.Whitelist
    39  	plugin, exist := pluginSet[c.Name]
    40  	if !exist {
    41  		return nil
    42  	}
    43  	whitelistOnce.Do(func() {
    44  		if err := plugin.Initialize(c); err != nil {
    45  			log.Errorf("Whitelist plugin init err: %s", err.Error())
    46  			os.Exit(-1)
    47  		}
    48  	})
    49  	return plugin.(Whitelist)
    50  }