1 /* 2 * Copyright 2016 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 com.google.common.annotations.VisibleForTesting; 20 import io.grpc.InternalChannelz.ChannelStats; 21 import io.grpc.InternalInstrumented; 22 import io.grpc.LoadBalancer; 23 24 /** 25 * The base interface of the Subchannels returned by {@link 26 * io.grpc.LoadBalancer.Helper#createSubchannel}. 27 */ 28 abstract class AbstractSubchannel extends LoadBalancer.Subchannel { 29 30 /** 31 * Returns the InternalSubchannel as an {@code Instrumented<T>} for the sole purpose of channelz 32 * unit tests. 33 */ 34 @VisibleForTesting getInstrumentedInternalSubchannel()35 abstract InternalInstrumented<ChannelStats> getInstrumentedInternalSubchannel(); 36 } 37