Source:
public QueueFileOffHeapDispatchQueue(Function<T, byte[]> serializer, Function<byte[], T> deserializer, String moduleName, Path filePath, int inMemoryQueueSize, int batchSize, long maxFileSizeInBytes) throws IOException { Objects.requireNonNull(serializer); Objects.requireNonNull(deserializer); Objects.requireNonNull(moduleName); if (inMemoryQueueSize < 1) { throw new IllegalArgumentException("In memory queue size must be greater than 0"); } if (inMemoryQueueSize % batchSize != 0) { throw new IllegalArgumentException("In memory queue size must be a multiple of batch size"); } if (maxFileSizeInBytes < 0) { throw new IllegalArgumentException("Max file size must be either 0 or a positive integer"); } this.serializer = serializer; this.deserializer = deserializer; this.moduleName = moduleName; this.batchSize = batchSize; this.maxFileSizeInBytes = maxFileSizeInBytes; batch = new Batch(batchSize); inMemoryQueue = new ArrayBlockingQueue<>(inMemoryQueueSize, true); if (maxFileSizeInBytes > 0) { Objects.requireNonNull(filePath); File file = Paths.get(filePath.toString(), moduleName + FILE_EXTENSION).toFile(); QueueFile qf; try { qf = new QueueFile.Builder(file).build(); } catch (Exception e) { LOG.warn("Exception while loading queue file", e); if (file.delete()) { qf = new QueueFile.Builder(file).build(); } else { throw new IOException("Could delete corrupted queue file " + file.getAbsolutePath()); } } offHeapQueue = qf; try { usedBytesMethod = offHeapQueue.getClass().getDeclaredMethod("usedBytes"); usedBytesMethod.setAccessible(true); } catch (NoSuchMethodException e) { LOG.warn("Could not instantiate queue", e); throw new RuntimeException(e); } checkFileSize(); } else { offHeapQueue = null; usedBytesMethod = null; } }

Target:
public QueueFileOffHeapDispatchQueue(Function<T, byte[]> serializer, Function<byte[], T> deserializer, String moduleName, Path filePath, int inMemoryQueueSize, int batchSize, long maxFileSizeInBytes) throws IOException { Objects.requireNonNull(serializer); Objects.requireNonNull(deserializer); Objects.requireNonNull(moduleName); if (inMemoryQueueSize < 1) { throw new IllegalArgumentException("In memory queue size must be greater than 0"); } if (inMemoryQueueSize % batchSize != 0) { throw new IllegalArgumentException("In memory queue size must be a multiple of batch size"); } if (maxFileSizeInBytes < 0) { throw new IllegalArgumentException("Max file size must be either 0 or a positive integer"); } this.serializer = serializer; this.deserializer = deserializer; this.moduleName = moduleName; this.batchSize = batchSize; this.maxFileSizeInBytes = maxFileSizeInBytes; batch = new Batch(batchSize); inMemoryQueue = new ArrayBlockingQueue<>(inMemoryQueueSize, true); if (maxFileSizeInBytes > 0) { Objects.requireNonNull(filePath); File file = Paths.get(filePath.toString(), moduleName + FILE_EXTENSION).toFile(); QueueFile qf; try { qf = new QueueFile.Builder(file).build(); } catch (Exception e) { LOG.warn("Exception while loading queue file", e); if (file.delete()) { qf = new QueueFile.Builder(file).build(); } else { throw new IOException("Could not delete corrupted queue file " + file.getAbsolutePath()); } } offHeapQueue = qf; try { usedBytesMethod = offHeapQueue.getClass().getDeclaredMethod("usedBytes"); usedBytesMethod.setAccessible(true); } catch (NoSuchMethodException e) { LOG.warn("Could not instantiate queue", e); throw new RuntimeException(e); } checkFileSize(); } else { offHeapQueue = null; usedBytesMethod = null; } }