1 /* 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 package org.apache.hadoop.hbase.util; 20 21 import org.apache.hadoop.classification.InterfaceAudience; 22 import org.apache.hadoop.classification.InterfaceStability; 23 24 /** 25 * Has some basic interaction with the environment. Alternate implementations 26 * can be used where required (eg in tests). 27 * 28 * @see EnvironmentEdgeManager 29 */ 30 @InterfaceAudience.Public 31 @InterfaceStability.Evolving 32 public interface EnvironmentEdge { 33 34 /** 35 * Returns the currentTimeMillis. 36 * 37 * @return currentTimeMillis. 38 */ 39 long currentTimeMillis(); 40 }