dubbo.apache.org/dubbo-go/v3@v3.1.1/common/extension/metadata_service_proxy_factory.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  	"fmt"
    22  )
    23  
    24  import (
    25  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    26  	"dubbo.apache.org/dubbo-go/v3/metadata/service"
    27  )
    28  
    29  var metadataServiceProxyFactoryMap = make(map[string]func() service.MetadataServiceProxyFactory, 2)
    30  
    31  type MetadataServiceProxyFactoryFunc func() service.MetadataServiceProxyFactory
    32  
    33  // SetMetadataServiceProxyFactory store the name-creator pair
    34  func SetMetadataServiceProxyFactory(name string, creator MetadataServiceProxyFactoryFunc) {
    35  	metadataServiceProxyFactoryMap[name] = creator
    36  }
    37  
    38  // GetMetadataServiceProxyFactory will create an instance.
    39  // it will panic if the factory with name not found
    40  func GetMetadataServiceProxyFactory(name string) service.MetadataServiceProxyFactory {
    41  	if name == "" {
    42  		name = constant.DefaultKey
    43  	}
    44  	if f, ok := metadataServiceProxyFactoryMap[name]; ok {
    45  		return f()
    46  	}
    47  	panic(fmt.Sprintf("could not find the metadata service factory creator for name: %s, "+
    48  		"please check whether you have imported relative packages, "+
    49  		"local - dubbo.apache.org/dubbo-go/v3/metadata/service/local", name))
    50  }