Here's a quick tip that might be useful to some Java nuts out there. Often in Java, it can be helpful to save a stack trace as a String. This is useful when an application (a web-app or standalone client application) needs to "report back" to a central server that an error occurred. When the client app pings the server to alert it of an Exception case, it's very helpful to also include the stack trace in the ping. If you ever find yourself needing to do this, here's how:
Enjoy.
/**
* Given a Throwable, gets the full stack trace for the
* Exception or Error as a String. Returns an empty string
* if something went wrong (so the caller won't fail with a
* null pointer exception later).
* @param t
* @return
* @author kolichko Mark Kolich
*/
public static String getStackTraceAsString ( Throwable t ) {
final StringWriter sw = new StringWriter();
final PrintWriter pw = new PrintWriter(sw, true);
String trace = new String();
try {
t.printStackTrace( pw );
pw.flush();
sw.flush();
trace = sw.toString();
}
catch ( Exception e ) { }
finally {
try {
sw.close();
pw.close();
}
catch ( Exception e ) { }
}
return trace;
}
Enjoy.
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