io.grpc.util.ForwardingLoadBalancer Maven / Gradle / Ivy
/*
* Copyright 2018 The gRPC Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.grpc.util;
import com.google.common.base.MoreObjects;
import io.grpc.Attributes;
import io.grpc.ConnectivityStateInfo;
import io.grpc.EquivalentAddressGroup;
import io.grpc.ExperimentalApi;
import io.grpc.LoadBalancer.Subchannel;
import io.grpc.LoadBalancer;
import io.grpc.NameResolver;
import io.grpc.Status;
import java.util.List;
@ExperimentalApi("https://github.com/grpc/grpc-java/issues/1771")
public abstract class ForwardingLoadBalancer extends LoadBalancer {
/**
* Returns the underlying balancer.
*/
protected abstract LoadBalancer delegate();
@Override
public void handleResolvedAddressGroups(
List servers,
@NameResolver.ResolutionResultAttr Attributes attributes) {
delegate().handleResolvedAddressGroups(servers, attributes);
}
@Override
public void handleNameResolutionError(Status error) {
delegate().handleNameResolutionError(error);
}
@Override
public void handleSubchannelState(
Subchannel subchannel, ConnectivityStateInfo stateInfo) {
delegate().handleSubchannelState(subchannel, stateInfo);
}
@Override
public void shutdown() {
delegate().shutdown();
}
@Override
public boolean canHandleEmptyAddressListFromNameResolution() {
return delegate().canHandleEmptyAddressListFromNameResolution();
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this).add("delegate", delegate()).toString();
}
}