Penambahan Timer untuk hitung target layanan otomatis bulanan

jasamedika-sdm/src/main/java/com/jasamedika/medifirst2000/asynctask/timer/TargetLayananTimer.java

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+package com.jasamedika.medifirst2000.asynctask.timer;
+
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Timer;
+import java.util.TimerTask;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TargetLayananTimer {
+	private final static Logger LOGGER = LoggerFactory.getLogger(TargetLayananTimer.class);
+
+	// What to do
+	private final Runnable whatToDo;
+
+	// when
+	private final int dayOfMonth;
+	private final int hourOfDay;
+
+	// The current timer
+	private Timer current = new Timer();
+
+	public void cancelCurrent() {
+		LOGGER.info("TargetLayananTimer : Cancel current execution");
+		current.cancel();
+
+		LOGGER.info("TargetLayananTimer : Removes the timertask so it can be garbage collected");
+		current.purge();
+	}
+
+	public static TargetLayananTimer schedule(Runnable runnable, int dayOfMonth, int hourOfDay) {
+		LOGGER.info("TargetLayananTimer : Create a new instance");
+		return new TargetLayananTimer(runnable, dayOfMonth, hourOfDay);
+	}
+
+	private TargetLayananTimer(Runnable runnable, int day, int hour) {
+		this.whatToDo = runnable;
+		this.dayOfMonth = day;
+		this.hourOfDay = hour;
+
+		schedule();
+	}
+
+	private void schedule() {
+		cancelCurrent();
+
+		LOGGER.info(
+				"TargetLayananTimer : Assigning a new instance of Timer, allow the previous Timer to be garbage collected");
+		current = new Timer();
+		current.schedule(new TimerTask() {
+			public void run() {
+				try {
+					LOGGER.info("TargetLayananTimer : Running schedule");
+					whatToDo.run();
+				} finally {
+					LOGGER.info("TargetLayananTimer : Schedule for the next month");
+					schedule();
+				}
+			}
+		}, nextDate());
+	}
+
+	private Date nextDate() {
+		Calendar runDate = Calendar.getInstance();
+		if (runDate.get(Calendar.DAY_OF_MONTH) < dayOfMonth) {
+			runDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+			runDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+			runDate.set(Calendar.MINUTE, 0);
+			runDate.set(Calendar.SECOND, 0);
+			runDate.set(Calendar.MILLISECOND, 0);
+		} else {
+			runDate.set(Calendar.DAY_OF_MONTH, dayOfMonth);
+			runDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
+			runDate.set(Calendar.MINUTE, 0);
+			runDate.set(Calendar.SECOND, 0);
+			runDate.set(Calendar.MILLISECOND, 0);
+			runDate.add(Calendar.MONTH, 1);
+		}
+
+		LOGGER.info("MonthlyTimer : Set to next month " + runDate.getTime());
+
+		return runDate.getTime();
+	}
+}