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Java > Open Source Codes > org > apache > ojb > otm > lock > isolation > ReadUncommittedIsolation


1 package org.apache.ojb.otm.lock.isolation;
2
3 /* Copyright 2003-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 import org.apache.ojb.otm.core.Transaction;
19 import org.apache.ojb.otm.lock.LockingException;
20 import org.apache.ojb.otm.lock.ObjectLock;
21
22 public class ReadUncommittedIsolation extends AbstractIsolation
23 {
24
25     /**
26      * @see org.apache.ojb.otm.lock.TransactionIsolation#lockForRead(Transaction, ObjectLocks)
27      */
28     public void readLock(Transaction tx, ObjectLock lock)
29     {
30         // Read locks are always granted
31 lock.readLock(tx);
32     }
33
34     /**
35      * @see org.apache.ojb.otm.lock.TransactionIsolation#lockForWrite(Transaction, ObjectLocks)
36      */
37     public void writeLock(Transaction tx, ObjectLock lock)
38         throws LockingException
39     {
40         // WriteLock will wait for an existing write lock to be released before it locks
41 // it for this transaction
42 lock.writeLock(tx);
43     }
44
45 }
46
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