1 /* 2 * Copyright 2018 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.util; 18 19 import com.google.common.base.MoreObjects; 20 import io.grpc.ChannelCredentials; 21 import io.grpc.ChannelLogger; 22 import io.grpc.ConnectivityState; 23 import io.grpc.EquivalentAddressGroup; 24 import io.grpc.ExperimentalApi; 25 import io.grpc.LoadBalancer; 26 import io.grpc.LoadBalancer.CreateSubchannelArgs; 27 import io.grpc.LoadBalancer.Subchannel; 28 import io.grpc.LoadBalancer.SubchannelPicker; 29 import io.grpc.ManagedChannel; 30 import io.grpc.ManagedChannelBuilder; 31 import io.grpc.NameResolver; 32 import io.grpc.NameResolverRegistry; 33 import io.grpc.SynchronizationContext; 34 import java.util.List; 35 import java.util.concurrent.ScheduledExecutorService; 36 37 @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1771") 38 public abstract class ForwardingLoadBalancerHelper extends LoadBalancer.Helper { 39 /** 40 * Returns the underlying helper. 41 */ delegate()42 protected abstract LoadBalancer.Helper delegate(); 43 44 @Override createSubchannel(CreateSubchannelArgs args)45 public Subchannel createSubchannel(CreateSubchannelArgs args) { 46 return delegate().createSubchannel(args); 47 } 48 49 @Override createOobChannel(EquivalentAddressGroup eag, String authority)50 public ManagedChannel createOobChannel(EquivalentAddressGroup eag, String authority) { 51 return delegate().createOobChannel(eag, authority); 52 } 53 54 @Override createOobChannel(List<EquivalentAddressGroup> eag, String authority)55 public ManagedChannel createOobChannel(List<EquivalentAddressGroup> eag, String authority) { 56 return delegate().createOobChannel(eag, authority); 57 } 58 59 @Override updateOobChannelAddresses(ManagedChannel channel, EquivalentAddressGroup eag)60 public void updateOobChannelAddresses(ManagedChannel channel, EquivalentAddressGroup eag) { 61 delegate().updateOobChannelAddresses(channel, eag); 62 } 63 64 @Override updateOobChannelAddresses(ManagedChannel channel, List<EquivalentAddressGroup> eag)65 public void updateOobChannelAddresses(ManagedChannel channel, List<EquivalentAddressGroup> eag) { 66 delegate().updateOobChannelAddresses(channel, eag); 67 } 68 69 @Deprecated 70 @Override createResolvingOobChannelBuilder(String target)71 public ManagedChannelBuilder<?> createResolvingOobChannelBuilder(String target) { 72 return delegate().createResolvingOobChannelBuilder(target); 73 } 74 75 @Override createResolvingOobChannelBuilder( String target, ChannelCredentials creds)76 public ManagedChannelBuilder<?> createResolvingOobChannelBuilder( 77 String target, ChannelCredentials creds) { 78 return delegate().createResolvingOobChannelBuilder(target, creds); 79 } 80 81 @Override createResolvingOobChannel(String target)82 public ManagedChannel createResolvingOobChannel(String target) { 83 return delegate().createResolvingOobChannel(target); 84 } 85 86 @Override updateBalancingState( ConnectivityState newState, SubchannelPicker newPicker)87 public void updateBalancingState( 88 ConnectivityState newState, SubchannelPicker newPicker) { 89 delegate().updateBalancingState(newState, newPicker); 90 } 91 92 @Override refreshNameResolution()93 public void refreshNameResolution() { 94 delegate().refreshNameResolution(); 95 } 96 97 @Override 98 @Deprecated ignoreRefreshNameResolutionCheck()99 public void ignoreRefreshNameResolutionCheck() { 100 delegate().ignoreRefreshNameResolutionCheck(); 101 } 102 103 @Override getAuthority()104 public String getAuthority() { 105 return delegate().getAuthority(); 106 } 107 108 @Override getChannelCredentials()109 public ChannelCredentials getChannelCredentials() { 110 return delegate().getChannelCredentials(); 111 } 112 113 @Override getUnsafeChannelCredentials()114 public ChannelCredentials getUnsafeChannelCredentials() { 115 return delegate().getUnsafeChannelCredentials(); 116 } 117 118 @Override getSynchronizationContext()119 public SynchronizationContext getSynchronizationContext() { 120 return delegate().getSynchronizationContext(); 121 } 122 123 @Override getScheduledExecutorService()124 public ScheduledExecutorService getScheduledExecutorService() { 125 return delegate().getScheduledExecutorService(); 126 } 127 128 @Override getChannelLogger()129 public ChannelLogger getChannelLogger() { 130 return delegate().getChannelLogger(); 131 } 132 133 @Override getNameResolverArgs()134 public NameResolver.Args getNameResolverArgs() { 135 return delegate().getNameResolverArgs(); 136 } 137 138 @Override getNameResolverRegistry()139 public NameResolverRegistry getNameResolverRegistry() { 140 return delegate().getNameResolverRegistry(); 141 } 142 143 @Override toString()144 public String toString() { 145 return MoreObjects.toStringHelper(this).add("delegate", delegate()).toString(); 146 } 147 } 148