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Java > Open Source Codes > org > apache > derby > impl > services > locks > Control


1 /*
2
3    Derby - Class org.apache.derby.impl.services.locks.Control
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.impl.services.locks;
23
24 import org.apache.derby.iapi.services.locks.Lockable;
25 import org.apache.derby.iapi.services.locks.Latch;
26 import java.util.List JavaDoc;
27
28 public interface Control {
29
30     public Lockable getLockable();
31
32     public LockControl getLockControl();
33
34     public Lock getLock(Object JavaDoc compatabilitySpace, Object JavaDoc qualifier);
35
36 //EXCLUDE-START-lockdiag-
37 /**
38         Clone this lock for the lock table information.
39         Objects cloned will not be altered.
40     */
41     public Control shallowClone();
42 //EXCLUDE-END-lockdiag-
43
44     public ActiveLock firstWaiter();
45
46     public boolean isEmpty();
47
48     public boolean unlock(Latch lockInGroup, int unlockCount);
49
50     public void addWaiters(java.util.Dictionary JavaDoc waiters);
51
52     public Lock getFirstGrant();
53
54     public List JavaDoc getGranted();
55
56     public List JavaDoc getWaiting();
57
58     public boolean isGrantable(boolean otherWaiters, Object JavaDoc compatabilitySpace, Object JavaDoc qualifier);
59
60
61 }
62
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