/**
* Schedule a task for repeated fixed-rate execution after a specific time has been reached.
*
* @param task the task to schedule.
* @param when time of first execution.
* @param period amount of time in milliseconds between subsequent executions.
* @throws IllegalArgumentException if {@code when.getTime() < 0} or {@code period < 0}.
* @throws IllegalStateException if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void scheduleAtFixedRate(TimerTask task, Date when, long period) {
if (period <= 0 || when.getTime() < 0) {
throw new IllegalArgumentException();
}
long delay = when.getTime() - System.currentTimeMillis();
scheduleImpl(task, delay, period, true);
}
/**
* Schedule a task for single execution. If {@code when} is less than the current time, it will be
* scheduled to be executed as soon as possible.
*
* @param task the task to schedule.
* @param when time of execution.
* @throws IllegalArgumentException if {@code when.getTime() < 0}.
* @throws IllegalStateException if the {@code Timer} has been canceled, or if the task has been
* scheduled or canceled.
*/
public void schedule(TimerTask task, Date when) {
if (when.getTime() < 0) {
throw new IllegalArgumentException();
}
long delay = when.getTime() - System.currentTimeMillis();
scheduleImpl(task, delay < 0 ? 0 : delay, -1, false);
}
public ModelAndView handleRequestInternal(HttpServletRequest request,
HttpServletResponse response) throws Exception {
ModelAndView mav = new ModelAndView("systeminfo");
mav.addObject("sysprops", new TreeMap<String, String>((Map) System.getProperties()));
mav.addObject("sysenv", new TreeMap<String, String>((Map) System.getenv()));
mav.addObject("systime", new Date());
//Calculate app uptime duration
Date appStartTime = (Date) getServletContext().getAttribute("appStartTime");
long durationMillis = new Date().getTime() - appStartTime.getTime();
String duration = DurationFormatUtils.formatDurationWords(durationMillis, true, false);
mav.addObject("appUptime", duration);
//Calculate system resources.
Runtime runtime = Runtime.getRuntime();
long totalMem = runtime.totalMemory() / MB;
long freeMem = runtime.freeMemory() / MB;
long avaCPU = runtime.availableProcessors();
mav.addObject("sysres", "CPU: " + avaCPU + ", MemoryUsed: " + (totalMem - freeMem) + "M/" + totalMem + "M");
if(applicationProperties== null){
applicationProperties = new Properties();
}
mav.addObject("applicationProps", applicationProperties);
return mav;
}
/**
* Sets the date of the switch from Julian dates to Gregorian dates. You can use <code>
* new Date(Long.MAX_VALUE)</code> to use a pure Julian calendar, or <code>Long.MIN_VALUE</code>
* for a pure Gregorian calendar.
*
* @param date the date of the change.
*/
public void setGregorianChange(Date date) {
gregorianCutover = date.getTime();
}