01: package org.apache.lucene.store.db;
02:
03: /**
04: * Licensed to the Apache Software Foundation (ASF) under one or more
05: * contributor license agreements. See the NOTICE file distributed with
06: * this work for additional information regarding copyright ownership.
07: * The ASF licenses this file to You under the Apache License, Version 2.0
08: * (the "License"); you may not use this file except in compliance with
09: * 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:
20: import org.apache.lucene.store.Lock;
21:
22: /**
23: * This implementation of {@link org.apache.lucene.store.Lock Lock} is
24: * trivial as {@link DbDirectory} operations are managed by the Berkeley DB
25: * locking system.
26: *
27: * @author Andi Vajda
28: */
29:
30: public class DbLock extends Lock {
31:
32: boolean isLocked = false;
33:
34: public DbLock() {
35: }
36:
37: public boolean obtain() {
38: return (isLocked = true);
39: }
40:
41: public void release() {
42: isLocked = false;
43: }
44:
45: public boolean isLocked() {
46: return isLocked;
47: }
48: }
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