private void commitMessage() {
MemCachedMessage<T> msg = null;
if ((msg = lastMsg.getAndSet(null)) != null) {
meta.updateRead(msg.getPos(), msg.getFile());
// 如果是文件的第一个消息，触发备份和删除老文件事件
if (msg.isFirstMessageInFile()) {
dataFile.archiveAndRemoveOldFile(msg.getFile());
}
}
}
/** @see FileQueue#get() */
public T get() {
MemCachedMessage<T> msg = null;
getLock.lock();
try {
msg = memcacheQueue.take();
lastMsg.set(msg);
commitMessage();
} catch (InterruptedException e) {
log.warn("interrupted when taking messsage from SeqFileStorage");
Thread.currentThread().interrupt();
} finally {
getLock.unlock();
}
return msg == null ? null : msg.getData();
}
/*
* (non-Javadoc)
*
* @see com.dp.hippo.queue.FileQueue#get(long,
* java.util.concurrent.TimeUnit)
*/
@Override
public T get(long timeout, TimeUnit timeUnit) {
MemCachedMessage<T> msg = null;
getLock.lock();
try {
msg = memcacheQueue.poll(timeout, timeUnit);
if (msg == null) {
return null;
}
lastMsg.set(msg);
commitMessage();
} catch (InterruptedException e) {
log.warn("interrupted when taking messsage from SeqFileStorage");
Thread.currentThread().interrupt();
} finally {
getLock.unlock();
}
return msg == null ? null : msg.getData();
}
