2 * ============LICENSE_START====================================================
4 * ===========================================================================
5 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
6 * ===========================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
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 * ============LICENSE_END====================================================
25 package org.onap.aaf.misc.env.impl;
27 import org.onap.aaf.misc.env.APIException;
28 import org.onap.aaf.misc.env.Env;
29 import org.onap.aaf.misc.env.LifeCycle;
34 * <h1>NullLifeCycle</h1>
36 * This is a convenience class for those Objects which should
37 * implement LifeCycle, but don't have anything to do in any of the
38 * LifeCycle methods defined. Extending
39 * NullLifeCycle reduces the required methods for the class by 5.
40 * Any one or two of them can be overloaded.<p>
42 * If more are overloaded, it is
43 * recommended just to implement LifeCycle.
46 * This only works, though, if the Object doesn't need to extend something
47 * else, due to Java's Single Extension policy. In other cases, just
48 * implement LifeCycle, and leave them empty.
53 public class NullLifeCycle implements LifeCycle {
54 public void servicePrestart(Env env) throws APIException {}
55 public void threadPrestart(Env env) throws APIException {}
56 public void refresh(Env env) throws APIException {}
57 public void threadDestroy(Env env) throws APIException {}
58 public void serviceDestroy(Env env) throws APIException {}