protected synchronized void flushToDisk() {
if (!memoryList.isEmpty() && store != null) {
long start = 0;
if (LOG.isTraceEnabled()) {
start = System.currentTimeMillis();
LOG.trace(
"{}, flushToDisk() mem list size: {} {}",
new Object[] {
name, memoryList.size(), (systemUsage != null ? systemUsage.getMemoryUsage() : "")
});
}
for (Iterator<MessageReference> iterator = memoryList.iterator(); iterator.hasNext(); ) {
MessageReference node = iterator.next();
node.decrementReferenceCount();
ByteSequence bs;
try {
bs = getByteSequence(node.getMessage());
getDiskList().addLast(node.getMessageId().toString(), bs);
} catch (IOException e) {
LOG.error("Failed to write to disk list", e);
throw new RuntimeException(e);
}
}
memoryList.clear();
setCacheEnabled(false);
LOG.trace(
"{}, flushToDisk() done - {} ms {}",
new Object[] {
name,
(System.currentTimeMillis() - start),
(systemUsage != null ? systemUsage.getMemoryUsage() : "")
});
}
}
/** @return the number of pending messages */
@Override
public synchronized int size() {
return memoryList.size() + (isDiskListEmpty() ? 0 : (int) getDiskList().size());
}