bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/StandardEnvironmentFacade.java [504:524]:
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    public Sequence openSequence(final Database database,
                                 final DatabaseEntry sequenceKey,
                                 final SequenceConfig sequenceConfig)
    {
        Sequence cachedSequence = _cachedSequences.get(sequenceKey);
        if (cachedSequence == null)
        {
            Sequence handle = database.openSequence(null, sequenceKey, sequenceConfig);
            Sequence existingHandle = _cachedSequences.putIfAbsent(sequenceKey, handle);
            if (existingHandle == null)
            {
                cachedSequence = handle;
            }
            else
            {
                cachedSequence = existingHandle;
                handle.close();
            }
        }
        return cachedSequence;
    }
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bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/replication/ReplicatedEnvironmentFacade.java [723:743]:
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    public Sequence openSequence(final Database database,
                                 final DatabaseEntry sequenceKey,
                                 final SequenceConfig sequenceConfig)
    {
        Sequence cachedSequence = _cachedSequences.get(sequenceKey);
        if (cachedSequence == null)
        {
            Sequence handle = database.openSequence(null, sequenceKey, sequenceConfig);
            Sequence existingHandle = _cachedSequences.putIfAbsent(sequenceKey, handle);
            if (existingHandle == null)
            {
                cachedSequence = handle;
            }
            else
            {
                cachedSequence = existingHandle;
                handle.close();
            }
        }
        return cachedSequence;
    }
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