[SOLVED] Store and read Streamdata

Store and read Streamdata

I have a workerprocess which generates a continuous Text Log (until it is finished). I send this Log to a Webserver, which should store this log. At the same time it should be possible for an user to view this log in real Time by using a different Webserver interface.

Actually I have a HashMap where Key is an ID and the value is a StringBuilder where I append the Data any time there comes a new log row.

The Problem is, that any process uses this HashMap and I am afraid when there will be more simultaneous processes and many users who want to read the log.

What would be a better approach for this use case?

Solution

Since all requests to Webserver are made in different threads, problem could occur when:

one thread will write to StringBuilder
another thread will read same StringBuilder.

Easiest solution: use StringBuffer instead of StringBuilder, because all its methods are synchronized.