/**
* Parses at-style time specification and returns the corresponding timestamp. For example:<p>
* <pre>
* long t = Util.getTimestamp("now-1d");
* </pre>
*
* @param atStyleTimeSpec at-style time specification. For the complete explanation of the syntax
* allowed see RRDTool's <code>rrdfetch</code> man page.<p>
* @return timestamp in seconds since epoch.
*/
public static long getTimestamp(String atStyleTimeSpec)
{
TimeSpec timeSpec = new TimeParser(atStyleTimeSpec).parse();
return(timeSpec.getTimestamp());
}