| /** |
| * 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.ipc; |
| |
| import com.google.protobuf.Message; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceStability; |
| import org.apache.hadoop.hbase.HBaseInterfaceAudience; |
| import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.RequestHeader; |
| import org.apache.hadoop.hbase.security.User; |
| |
| /** |
| * Function to figure priority of incoming request. |
| */ |
| @InterfaceAudience.LimitedPrivate({HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.PHOENIX}) |
| @InterfaceStability.Evolving |
| public interface PriorityFunction { |
| /** |
| * Returns the 'priority type' of the specified request. |
| * The returned value is mainly used to select the dispatch queue. |
| * @param header |
| * @param param |
| * @param user |
| * @return Priority of this request. |
| */ |
| int getPriority(RequestHeader header, Message param, User user); |
| |
| /** |
| * Returns the deadline of the specified request. |
| * The returned value is used to sort the dispatch queue. |
| * @param header |
| * @param param |
| * @return Deadline of this request. 0 now, otherwise msec of 'delay' |
| */ |
| long getDeadline(RequestHeader header, Message param); |
| } |