@Override
public boolean setCache(CacheSelector cacheSelector, Object cacheValue) throws Exception {
long timeout = cacheSelector.getTimeout();
String filePath = this.getRealFilePath(cacheSelector.getCacheKey());
boolean isSave =
FileOperate.saveObjectToFile(filePath, new FileCacheObject(timeout, cacheValue));
if (isSave && timeout > 0) {
FileCacheMonitor.getInstance().setFileCacheTime(filePath, timeout);
}
return isSave;
}
@Override
public int updateCache(CacheSelector cacheSelector) throws Exception {
// 如果只有这一层则在该层中更新
if (null == this.getNextCache()) {
return this.setCache(cacheSelector, cacheSelector.getSelectorValue()) ? 1 : 0;
} else {
return 0;
}
}
@Override
public int deleteCache(CacheSelector cacheSelector) throws Exception {
String cacheId = cacheSelector.getCacheKey();
String filePath = this.getRealFilePath(cacheId);
File f = new File(filePath);
// 文件缓存不存在则直接返回已删除
if (!f.exists()) {
return 1;
} else {
return f.delete() ? 1 : 0;
}
}
@Override
public Object getCache(CacheSelector cacheSelector) throws Exception {
File file = new File(this.getRealFilePath(cacheSelector.getCacheKey()));
if (!file.exists()) {
return null;
}
Object fileObj = FileOperate.getFileObject(file); // 文件中保存的对象
Object fileStorageObject = null; // 文件中保存的对象
if (null != fileObj && fileObj instanceof FileCacheObject) {
FileCacheObject fcObject = (FileCacheObject) fileObj;
// 缓存未过期才能获取对象
if (!fcObject.isCacheExpire()) {
fileStorageObject = fcObject.getStorageObject();
}
}
// 如果不存在或已过期则删除
if (null == fileStorageObject) {
file.delete();
}
return fileStorageObject;
}