重构网络爬虫与AspectJ API详解
一、网络爬虫的AspectJ重构
1.1 日志记录切面(LoggerAspectURLObject)
日志记录切面用于记录URL对象相关的操作和异常信息。以下是 LoggerAspectURLObject
的代码:
public aspect LoggerAspectURLObject extends LoggerAspect {
pointcut LogURLObject(URL sourceURL) :
initialization(public URLObject.new(URL, SpiderConfig)) &&
args(sourceURL, ..);
pointcut LogIOExceptionInConstructor(IOException e, URL sourceURL) :
handler(IOException) &&
args(e) &&
cflow(LogURLObject(sourceURL));
pointcut LogWrite(String filename) :
execution(public void writeToFile(String)) &&
args(filename);
pointcut LogIOExceptionInWrite(IOException e, String filena