initial metrics system

src/main/java/com/commafeed/backend/MetricsBean.java

@@ -0,0 +1,43 @@
+package com.commafeed.backend;
+
+import javax.ejb.Singleton;
+
+@Singleton
+public class MetricsBean {
+
+	private int feedsRefreshedLastMinute;
+	private int feedsRefreshedThisMinute;
+
+	private int feedsRefreshedLastHour;
+	private int feedsRefreshedThisHour;
+
+	private long minuteTimestamp;
+	private long hourTimestamp;
+
+	public void feedRefreshed() {
+		long now = System.currentTimeMillis();
+		if (now - minuteTimestamp > 60000) {
+			feedsRefreshedLastMinute = feedsRefreshedThisMinute;
+			feedsRefreshedThisMinute = 0;
+			minuteTimestamp = now;
+
+		}
+		feedsRefreshedThisMinute++;
+
+		if (now - hourTimestamp > 60000 * 60) {
+			feedsRefreshedLastHour = feedsRefreshedThisHour;
+			feedsRefreshedThisHour = 0;
+			hourTimestamp = now;
+
+		}
+		feedsRefreshedThisHour++;
+	}
+
+	public int getFeedsRefreshedLastMinute() {
+		return feedsRefreshedLastMinute;
+	}
+
+	public int getFeedsRefreshedLastHour() {
+		return feedsRefreshedLastHour;
+	}
+}