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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.client;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">021</span><span id="line-21"></span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hbase.thirdparty.com.google.protobuf.RpcCallback;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hbase.thirdparty.com.google.protobuf.RpcController;</span> |
| <span class="source-line-no">024</span><span id="line-24"></span> |
| <span class="source-line-no">025</span><span id="line-25">/**</span> |
| <span class="source-line-no">026</span><span id="line-26"> * Delegate to a protobuf rpc call.</span> |
| <span class="source-line-no">027</span><span id="line-27"> * <p></span> |
| <span class="source-line-no">028</span><span id="line-28"> * Usually, it is just a simple lambda expression, like:</span> |
| <span class="source-line-no">029</span><span id="line-29"> *</span> |
| <span class="source-line-no">030</span><span id="line-30"> * <pre></span> |
| <span class="source-line-no">031</span><span id="line-31"> * (stub, controller, rpcCallback) -&gt; {</span> |
| <span class="source-line-no">032</span><span id="line-32"> * XXXRequest request = ...; // prepare the request</span> |
| <span class="source-line-no">033</span><span id="line-33"> * stub.xxx(controller, request, rpcCallback);</span> |
| <span class="source-line-no">034</span><span id="line-34"> * }</span> |
| <span class="source-line-no">035</span><span id="line-35"> * </pre></span> |
| <span class="source-line-no">036</span><span id="line-36"> *</span> |
| <span class="source-line-no">037</span><span id="line-37"> * And if already have the {@code request}, the lambda expression will be:</span> |
| <span class="source-line-no">038</span><span id="line-38"> *</span> |
| <span class="source-line-no">039</span><span id="line-39"> * <pre></span> |
| <span class="source-line-no">040</span><span id="line-40"> * (stub, controller, rpcCallback) -&gt; stub.xxx(controller, request, rpcCallback)</span> |
| <span class="source-line-no">041</span><span id="line-41"> * </pre></span> |
| <span class="source-line-no">042</span><span id="line-42"> *</span> |
| <span class="source-line-no">043</span><span id="line-43"> * @param <S> the type of the protobuf Service you want to call.</span> |
| <span class="source-line-no">044</span><span id="line-44"> * @param <R> the type of the return value.</span> |
| <span class="source-line-no">045</span><span id="line-45"> */</span> |
| <span class="source-line-no">046</span><span id="line-46">@InterfaceAudience.Public</span> |
| <span class="source-line-no">047</span><span id="line-47">@FunctionalInterface</span> |
| <span class="source-line-no">048</span><span id="line-48">public interface ServiceCaller<S, R> {</span> |
| <span class="source-line-no">049</span><span id="line-49"></span> |
| <span class="source-line-no">050</span><span id="line-50"> /**</span> |
| <span class="source-line-no">051</span><span id="line-51"> * Represent the actual protobuf rpc call.</span> |
| <span class="source-line-no">052</span><span id="line-52"> * @param stub the asynchronous stub</span> |
| <span class="source-line-no">053</span><span id="line-53"> * @param controller the rpc controller, has already been prepared for you</span> |
| <span class="source-line-no">054</span><span id="line-54"> * @param rpcCallback the rpc callback, has already been prepared for you</span> |
| <span class="source-line-no">055</span><span id="line-55"> */</span> |
| <span class="source-line-no">056</span><span id="line-56"> void call(S stub, RpcController controller, RpcCallback<R> rpcCallback);</span> |
| <span class="source-line-no">057</span><span id="line-57">}</span> |
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