dubbo.apache.org/dubbo-go/v3@v3.1.1/xds/xds_handshake_cluster.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  /*
    19   *
    20   * Copyright 2021 gRPC authors.
    21   *
    22   */
    23  
    24  package xds
    25  
    26  import (
    27  	"google.golang.org/grpc/attributes"
    28  
    29  	"google.golang.org/grpc/resolver"
    30  )
    31  
    32  // handshakeClusterNameKey is the type used as the key to store cluster name in
    33  // the Attributes field of resolver.Address.
    34  type handshakeClusterNameKey struct{}
    35  
    36  // SetXDSHandshakeClusterName returns a copy of addr in which the Attributes field
    37  // is updated with the cluster name.
    38  func SetXDSHandshakeClusterName(addr resolver.Address, clusterName string) resolver.Address {
    39  	addr.Attributes = addr.Attributes.WithValue(handshakeClusterNameKey{}, clusterName)
    40  	return addr
    41  }
    42  
    43  // GetXDSHandshakeClusterName returns cluster name stored in attr.
    44  func GetXDSHandshakeClusterName(attr *attributes.Attributes) (string, bool) {
    45  	v := attr.Value(handshakeClusterNameKey{})
    46  	name, ok := v.(string)
    47  	return name, ok
    48  }