dubbo.apache.org/dubbo-go/v3@v3.1.1/config/instance/registry_metadata_report.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 instance
    19  
    20  import (
    21  	"sync"
    22  )
    23  
    24  import (
    25  	"github.com/dubbogo/gost/log/logger"
    26  )
    27  
    28  import (
    29  	"dubbo.apache.org/dubbo-go/v3/common"
    30  	"dubbo.apache.org/dubbo-go/v3/common/extension"
    31  	"dubbo.apache.org/dubbo-go/v3/metadata/report"
    32  )
    33  
    34  var (
    35  	regInstances = make(map[string]report.MetadataReport, 8)
    36  	mux          sync.RWMutex
    37  )
    38  
    39  // GetMetadataReportByRegistryProtocol obtain metadata report instance through registry config
    40  func GetMetadataReportByRegistryProtocol(protocol string) report.MetadataReport {
    41  	mux.RLock()
    42  	defer mux.RUnlock()
    43  	if protocol == "" {
    44  		// return the first instance
    45  		for _, regInstance := range regInstances {
    46  			return regInstance
    47  		}
    48  	}
    49  	// find the accurate instance
    50  	regInstance, ok := regInstances[protocol]
    51  	if !ok {
    52  		return nil
    53  	}
    54  	return regInstance
    55  }
    56  
    57  // SetMetadataReportInstanceByReg set metadata reporting instances by registering urls
    58  func SetMetadataReportInstanceByReg(url *common.URL) {
    59  	mux.Lock()
    60  	defer mux.Unlock()
    61  	if _, ok := regInstances[url.Protocol]; ok {
    62  		return
    63  	}
    64  
    65  	fac := extension.GetMetadataReportFactory(url.Protocol)
    66  	if fac != nil {
    67  		regInstances[url.Protocol] = fac.CreateMetadataReport(url)
    68  	} else {
    69  		logger.Infof("Metadata of type %v not registered.", url.Protocol)
    70  	}
    71  }