dubbo.apache.org/dubbo-go/v3@v3.1.1/common/extension/metadata_service_exporter.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package extension
    19  
    20  import (
    21  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    22  	"dubbo.apache.org/dubbo-go/v3/metadata/service"
    23  	"dubbo.apache.org/dubbo-go/v3/metadata/service/exporter"
    24  )
    25  
    26  type MetadataServiceExporterCreator func(service.MetadataService) exporter.MetadataServiceExporter
    27  
    28  var (
    29  	metadataServiceExporterInsMap = make(map[string]MetadataServiceExporterCreator, 2)
    30  )
    31  
    32  // SetMetadataServiceExporter will store the type => creator pair
    33  func SetMetadataServiceExporter(key string, creator MetadataServiceExporterCreator) {
    34  	metadataServiceExporterInsMap[key] = creator
    35  }
    36  
    37  // GetMetadataServiceExporter will create a MetadataServiceExporter instance
    38  func GetMetadataServiceExporter(key string, s service.MetadataService) exporter.MetadataServiceExporter {
    39  	if key == "" {
    40  		key = constant.DefaultKey
    41  	}
    42  	if creator, ok := metadataServiceExporterInsMap[key]; ok {
    43  		return creator(s)
    44  	}
    45  	return nil
    46  }