1 /* 2 * Copyright 2017 The gRPC Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.grpc.internal; 18 19 import io.grpc.Attributes; 20 import java.util.Map; 21 22 /** 23 * Special attributes that are only useful to gRPC. 24 */ 25 public final class GrpcAttributes { 26 /** 27 * Attribute key for service config. 28 */ 29 public static final Attributes.Key<Map<String, Object>> NAME_RESOLVER_SERVICE_CONFIG = 30 Attributes.Key.create("service-config"); 31 32 /** 33 * The naming authority of a gRPC LB server address. It is an address-group-level attribute, 34 * present when the address group is a LoadBalancer. 35 */ 36 public static final Attributes.Key<String> ATTR_LB_ADDR_AUTHORITY = 37 Attributes.Key.create("io.grpc.grpclb.lbAddrAuthority"); 38 39 /** 40 * Whether this EquivalentAddressGroup was provided by a GRPCLB server. It would be rare for this 41 * value to be {@code false}; generally it would be better to not have the key present at all. 42 */ 43 public static final Attributes.Key<Boolean> ATTR_LB_PROVIDED_BACKEND = 44 Attributes.Key.create("io.grpc.grpclb.lbProvidedBackend"); 45 GrpcAttributes()46 private GrpcAttributes() {} 47 } 48