1 package org.apache.hadoop.hbase; 2 /** 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 */ 19 20 /** 21 * Marker Interface used by ipc. We need a means of referring to 22 * ipc "protocols" generically. For example, we need to tell an rpc 23 * server the "protocols" it implements and it helps if all protocols 24 * implement a common 'type'. That is what this Interface is used for. 25 */ 26 // This Interface replaces the old VersionedProtocol Interface. Rather 27 // than redo a bunch of code its removal, instead we put in place this 28 // Interface and change all VP references to Protocol references. 29 30 // It is moved up here to top-level because it is ugly having members 31 // of super packages reach down into subpackages. 32 public interface IpcProtocol {}