Java Programming

Hi All,
In my application I have a requirement that when client is running and server is down or stopped, the client should store the information to be sent to server in a log file and when the server starts again, client should get data from log file and send to server. Can any one give me some guidance on how to do this? i want to use java.util.logging Logger. Please help me.
I am able to store the data into log file. But how to retrieve back this data? Any guidance on this would be very useful.