1 /**
2 * Copyright 2010-2014 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.common.util.runonce.smart;
17
18 public interface RunOnce {
19
20 /**
21 * Do whatever is needed for isTrue() to return the correct value
22 */
23 void initialize();
24
25 /**
26 * Indicates it is safe to run something once.
27 */
28 boolean isTrue();
29
30 /**
31 * Update state in a way that persists across JVM restarts (eg database table, properties file, etc)
32 */
33 void changeState(RunOnceState state);
34
35 }