InMemorySequenceProvider


1   /*
2    * All content copyright (c) 2003-2007 Terracotta, Inc., except as may otherwise be noted in a separate copyright
3    * notice. All rights reserved.
4    */
5   package com.tc.objectserver.persistence.impl;
6   
7   import com.tc.objectserver.persistence.api.PersistentSequence;
8   import com.tc.util.Assert;
9   import com.tc.util.UUID;
10  
11  public class InMemorySequenceProvider implements PersistentSequence {
12  
13    private final String   uid = UUID.getUUID().toString();
14    private long         id  = 0;
15  
16    public synchronized String   getUID() {
17      return uid;
18    }
19  
20    public synchronized long next() {
21      return id++;
22    }
23  
24    public synchronized long nextBatch(int batchSize) {
25      long lid = id;
26      id += batchSize;
27      return lid;
28    }
29  
30    public synchronized void setNext(long next) {
31      Assert.assertTrue(id <= next);
32      id = next;
33    }
34  
35  }
36

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