Add a small utility to help with dealing with time units

Author: mariostallone

objectcache/src/main/java/com/myntra/objectcache/Expiry.java

@@ -0,0 +1,22 @@
+package com.myntra.objectcache;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author mario
+ * A small helper class to set expiry for the cache
+ */
+public class Expiry {
+    public static long MINUTES(long minutes) {
+        return TimeUnit.MINUTES.toMillis(minutes);
+    }
+    public static long SECONDS(long seconds) {
+        return TimeUnit.SECONDS.toMillis(seconds);
+    }
+    public static long HOURS(long hours) {
+        return TimeUnit.HOURS.toMillis(hours);
+    }
+    public static long DAYS(long days) {
+        return TimeUnit.DAYS.toMillis(days);
+    }
+}