org.apache.hadoop.hbase.client.ServiceCaller Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hbase.client;
import com.google.protobuf.RpcCallback;
import com.google.protobuf.RpcController;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Delegate to a protobuf rpc call.
*
* Usually, it is just a simple lambda expression, like:
*
*
* (stub, controller, rpcCallback) -> {
* XXXRequest request = ...; // prepare the request
* stub.xxx(controller, request, rpcCallback);
* }
*
*
* And if already have the {@code request}, the lambda expression will be:
*
*
* (stub, controller, rpcCallback) -> stub.xxx(controller, request, rpcCallback)
*
*
* @param the type of the protobuf Service you want to call.
* @param the type of the return value.
*/
@InterfaceAudience.Public
@FunctionalInterface
public interface ServiceCaller {
/**
* Represent the actual protobuf rpc call.
* @param stub the asynchronous stub
* @param controller the rpc controller, has already been prepared for you
* @param rpcCallback the rpc callback, has already been prepared for you
*/
void call(S stub, RpcController controller, RpcCallback rpcCallback);
}