public DefaultFileQueueImpl(final String configFile, final String storageName) {
this.meta = new DefaultFileQueueMeta(storageName, configFile);
this.dataFile = new DefaultFileQueueDataFile(storageName, configFile);
this.memcacheQueue =
new LinkedBlockingQueue<MemCachedMessage<T>>(
DefaultFileQueueConfig.getInstance(configFile).getMemCacheSize());
loadMeta();
this.storageName = storageName;
this.configFile = configFile;
this.lastMsg = new AtomicReference<MemCachedMessage<T>>(null);
this.dataFileOutputStream = null;
// 启动后台批量填充内存缓存的任务
start();
log.info(
"Inited SeqFileStorage: "
+ storageName
+ " readingFile: "
+ memCacheFileReading
+ " pos: "
+ memCacheLoadPos);
}
private void checkDataFileOutputStream() {
FileInputStream input = null;
try {
// 启动的时候，dataFileOutputStream为null，不管上次启动时候写入的文件满了没，
// 为了简单起见，还是新建一个文件
if (dataFileOutputStream == null) {
String newDataFileName = dataFile.createStorageFile();
dataFileOutputStream = new ObjectOutputStream(new FileOutputStream(newDataFileName));
meta.updateWrite(newDataFileName);
// 更新写入的偏移量
fileMap.put(newDataFileName, new AtomicLong(0));
objectOutputstreamTimes = 0;
}
input = new FileInputStream(meta.getFileWriting());
// 如果达到配置文件指定的大小，切换文件
if (input.available()
>= DefaultFileQueueConfig.getInstance(configFile).getMaxDataFileSize()) {
dataFileOutputStream.close();
String newDataFileName = dataFile.createStorageFile();
dataFileOutputStream = new ObjectOutputStream(new FileOutputStream(newDataFileName));
// 清除切换前老文件的记录
fileMap.remove(meta.getFileWriting());
meta.updateWrite(newDataFileName);
// 更新写入的偏移量
fileMap.put(newDataFileName, new AtomicLong(0));
objectOutputstreamTimes = 0;
}
} catch (Exception e) {
log.error("Create data file failed.", e);
throw new RuntimeException("create data file failed.", e);
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
log.error("Close temp inputstream for size cal failed.", e);
}
}
}
}
