On Jan 12, 2009, at 8:50 AM, Aswani wrote:
Thank you Ceki.
Is there any appender in Logback to buffer all events of one user(per client request)? Is the CyclicBufferAppender or WriterAppender suitable for this requirement?
Yes, writing to Database is slower than writing to file. That the reason we are thinking of buffering the events and write them at once as a single message(clob data). We are also thinking of making this DB process asynchronous.
I am curious as to why you want to buffer per user? Is that a real requirement or are you just trying to figure out when to flush them? The approach I have seen taken is to have a buffer with a fixed number of records along with a timeout. The timeout ensures that the buffer doesn't sit there partly full for too long. Buffering per request is a little difficult. You'd need to have a buffer attached to a ThreadLocal so that it can be located without requiring the Request object. But if the request thread does work on another thread as well things would get messy. Plus, the appender can't really know when to flush the buffer without the application forcing it. Ralph