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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.omid.tso;
19  
20  public interface LeaseManagement {
21  
22      class LeaseManagementException extends Exception {
23  
24          private static final long serialVersionUID = -2061376444591776881L;
25  
26          LeaseManagementException(String msg) {
27              super(msg);
28          }
29  
30  
31          LeaseManagementException(String msg, Exception e) {
32              super(msg, e);
33          }
34  
35      }
36  
37      /**
38       * Allows to start the service implementing the lease management.
39       */
40      void startService() throws Exception;
41  
42      /**
43       * Allows to stop the service implementing the lease management.
44       */
45      void stopService() throws Exception;
46  
47      /**
48       * Check if the instance is still is under the lease period.
49       */
50      boolean stillInLeasePeriod();
51  
52  }