1 /* 2 * Copyright 2021 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; 18 19 import java.util.concurrent.Executor; 20 import javax.annotation.Nullable; 21 22 /** 23 * Defines what executor handles the server call, based on each RPC call information at runtime. 24 * */ 25 @ExperimentalApi("https://github.com/grpc/grpc-java/issues/8274") 26 public interface ServerCallExecutorSupplier { 27 28 /** 29 * Returns an executor to handle the server call. 30 * It should never throw. It should return null to fallback to the default executor. 31 * */ 32 @Nullable getExecutor(ServerCall<ReqT, RespT> call, Metadata metadata)33 <ReqT, RespT> Executor getExecutor(ServerCall<ReqT, RespT> call, Metadata metadata); 34 } 35