--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/global/WebCache.java	Thu Mar 21 19:15:52 2019 -0600
@@ -0,0 +1,38 @@
+package global;
+
+import fschmidt.util.servlet.HttpCache;
+import nabble.model.Init;
+
+
+enum WebCache implements HttpCache {
+	INSTANCE;
+
+	private static final long hour = 1000L*60*60;
+	private static final long cacheTime = Init.get("cacheTime",hour);
+
+	private long mod = now();
+
+	private static long now() {
+		return System.currentTimeMillis()/1000*1000;
+	}
+
+	public synchronized long[] lastModifieds(String[] modifyingEvents) {
+		long now = now();
+		if( now - mod > cacheTime )
+			mod = now;
+		long[] rtn = new long[modifyingEvents.length];
+		for( int i=0; i<modifyingEvents.length; i++ ) {
+			rtn[i] = mod;
+		}
+		return rtn;
+	}
+
+	public void modified(String modifyingEvent) {
+		throw new UnsupportedOperationException();
+	}
+
+	public synchronized void clear() {
+		mod = now();
+	}
+
+}