Netflix · ebukoski · Aug 9, 2016 · Aug 2, 2016 · Aug 2, 2016
diff --git a/src/main/java/com/netflix/simianarmy/basic/BasicCalendar.java b/src/main/java/com/netflix/simianarmy/basic/BasicCalendar.java
@@ -50,7 +50,7 @@ public class BasicCalendar implements MonkeyCalendar {
     private final TimeZone tz;
 
     /** The holidays. */
-    private final Set<Integer> holidays = new TreeSet<Integer>();
+    protected final Set<Integer> holidays = new TreeSet<Integer>();
 
     /** The cfg. */
     private MonkeyConfiguration cfg;
@@ -83,7 +83,7 @@ public BasicCalendar(int open, int close, TimeZone timezone) {
         closeHour = close;
         tz = timezone;
     }
-    
+
     /**
      * Instantiates a new basic calendar.
      *
@@ -235,7 +235,7 @@ protected void loadHolidays(int year) {
      *            the day
      * @return the day of the year
      */
-    private int dayOfYear(int year, int month, int day) {
+    protected int dayOfYear(int year, int month, int day) {
         Calendar holiday = now();
         holiday.set(Calendar.YEAR, year);
         holiday.set(Calendar.MONTH, month);
@@ -256,7 +256,7 @@ private int dayOfYear(int year, int month, int day) {
      *            the week in month
      * @return the day of the year
      */
-    private int dayOfYear(int year, int month, int dayOfWeek, int weekInMonth) {
+    protected int dayOfYear(int year, int month, int dayOfWeek, int weekInMonth) {
         Calendar holiday = now();
         holiday.set(Calendar.YEAR, year);
         holiday.set(Calendar.MONTH, month);
@@ -276,7 +276,7 @@ private int dayOfYear(int year, int month, int dayOfWeek, int weekInMonth) {
      *            the day
      * @return the day of the year adjusted to the closest workday
      */
-    private int workDayInYear(int year, int month, int day) {
+    protected int workDayInYear(int year, int month, int day) {
         Calendar holiday = now();
         holiday.set(Calendar.YEAR, year);
         holiday.set(Calendar.MONTH, month);
@@ -308,8 +308,7 @@ public Date getBusinessDay(Date date, int n) {
 
     private boolean isWeekend(Calendar calendar) {
         int dow = calendar.get(Calendar.DAY_OF_WEEK);
-        return dow == Calendar.SATURDAY
-                || dow == Calendar.SUNDAY;
+        return dow == Calendar.SATURDAY || dow == Calendar.SUNDAY;
     }
 
 }
diff --git a/src/main/java/com/netflix/simianarmy/basic/BasicSimianArmyContext.java b/src/main/java/com/netflix/simianarmy/basic/BasicSimianArmyContext.java
@@ -123,19 +123,18 @@ protected BasicSimianArmyContext(String... configFiles) {
         }
 
         config = new BasicConfiguration(properties);
-        calendar = new BasicCalendar(config);
 
         account = config.getStr("simianarmy.client.aws.accountKey");
         secret = config.getStr("simianarmy.client.aws.secretKey");
         accountName = config.getStrOrElse("simianarmy.client.aws.accountName", "Default");
-        
+
         String defaultRegion = "us-east-1";
         Region currentRegion = Regions.getCurrentRegion();
-        
+
         if (currentRegion != null) {
             defaultRegion = currentRegion.getName();
         }
-        
+
         region = config.getStrOrElse("simianarmy.client.aws.region", defaultRegion);
         GLOBAL_OWNER_TAGKEY = config.getStrOrElse("simianarmy.tags.owner", "owner");
 
@@ -165,6 +164,8 @@ protected BasicSimianArmyContext(String... configFiles) {
 
         createClient();
 
+        createCalendar();
+
         createScheduler();
 
         createRecorder();
@@ -224,6 +225,17 @@ private void createRecorder() {
         }
     }
 
+    @SuppressWarnings("unchecked")
+    private void createCalendar() {
+        @SuppressWarnings("rawtypes")
+        Class calendarClass = loadClientClass("simianarmy.calendar.class");
+        if (calendarClass == null || calendarClass.equals(BasicCalendar.class)) {
+            setCalendar(new BasicCalendar(config));
+        } else {
+            setCalendar((MonkeyCalendar) factory(calendarClass));
+        }
+    }
+
     /**
      * Create the specific client with region taken from properties.
      * Override to provide your own client.

diff --git a/src/main/java/com/netflix/simianarmy/basic/calendars/BavarianCalendar.java b/src/main/java/com/netflix/simianarmy/basic/calendars/BavarianCalendar.java
@@ -0,0 +1,157 @@
+/*
+ *
+ *  Copyright 2012 Netflix, Inc.
+ *
+ *     Licensed under the Apache License, Version 2.0 (the "License");
+ *     you may not use this file except in compliance with the License.
+ *     You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *     Unless required by applicable law or agreed to in writing, software
+ *     distributed under the License is distributed on an "AS IS" BASIS,
+ *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *     See the License for the specific language governing permissions and
+ *     limitations under the License.
+ *
+ */
+package com.netflix.simianarmy.basic.calendars;
+
+import com.netflix.simianarmy.MonkeyConfiguration;
+import com.netflix.simianarmy.basic.BasicCalendar;
+
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Collection;
+
+// CHECKSTYLE IGNORE MagicNumberCheck
+/**
+ * The Class BavarianCalendar.
+ */
+public class BavarianCalendar extends BasicCalendar
+{
+    /**
+     * Instantiates a new basic calendar.
+     *
+     * @param cfg  the monkey configuration
+     */
+    public BavarianCalendar(MonkeyConfiguration cfg)
+    {
+        super(cfg);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected void loadHolidays(int year) {
+        holidays.clear();
+
+        // these aren't all strictly holidays, but days when engineers will likely
+        // not be in the office to respond to rampaging monkeys
+
+        // first of all, we need easter sunday doy,
+        // because ome other holidays calculated from it
+        int easter = westernEasterDayOfYear(year);
+
+        // new year
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.JANUARY, 1)));
+
+        // epiphanie
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.JANUARY, 6)));
+
+        // good friday, always friday, don't need to check if it's bridge day
+        holidays.add(easter - 2);
+
+        // easter monday, always monday, don't need to check if it's bridge day
+        holidays.add(easter + 1);
+
+        // labor day
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.MAY, 1)));
+
+        // ascension day
+        holidays.addAll(getHolidayWithBridgeDays(year, easter + 39));
+
+        // whit monday, always monday, don't need to check if it's bridge day
+        holidays.add(easter + 50);
+
+        // corpus christi
+        holidays.add(westernEasterDayOfYear(year) + 60);
+
+        // assumption day
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.AUGUST, 15)));
+
+        // german unity day
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.OCTOBER, 3)));
+
+        // all saints
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.NOVEMBER, 1)));
+
+        // monkey goes on christmas vacations between christmas and new year!
+        holidays.addAll(getHolidayWithBridgeDays(year, dayOfYear(year, Calendar.DECEMBER, 24)));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 25));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 26));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 27));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 28));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 29));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 30));
+        holidays.add(dayOfYear(year, Calendar.DECEMBER, 31));
+
+        // mark the holiday set with the year, so on Jan 1 it will automatically
+        // recalculate the holidays for next year
+        holidays.add(year);
+    }
+
+    /**
+     * Returns collection of holidays, including Monday or Friday
+     * if given holiday is Thuesday or Thursday.
+     *
+     * The behaviour to take Monday as day off if official holiday is Thuesday
+     * and to take Friday as day off if official holiday is Thursday
+     * is specific to [at least] Germany.
+     * We call it, literally, "bridge day".
+     *
+     * @param dayOfYear  holiday day of year
+     */
+    private Collection<Integer> getHolidayWithBridgeDays(int year, int dayOfYear) {
+        Calendar holiday = now();
+        holiday.set(Calendar.YEAR, year);
+        holiday.set(Calendar.DAY_OF_YEAR, dayOfYear);
+        int dow = holiday.get(Calendar.DAY_OF_WEEK);
+        int mon = holiday.get(Calendar.MONTH);
+        int dom = holiday.get(Calendar.DAY_OF_MONTH);
+
+        // We don't want to include Monday if Thuesday is January 1.
+        if (dow == Calendar.TUESDAY && dayOfYear != 1)
+            return Arrays.asList(dayOfYear, dayOfYear - 1);
+
+        // We don't want to include Friday if Thursday is December 31.
+        if (dow == Calendar.THURSDAY && (mon != Calendar.DECEMBER || dom != 31))
+            return Arrays.asList(dayOfYear, dayOfYear + 1);
+
+        return Arrays.asList(dayOfYear);
+    }
+
+    /**
+     * Western easter sunday in year.
+     *
+     * @param year
+     *            the year
+     * @return the day of the year of western easter sunday
+     */
+    protected int westernEasterDayOfYear(int year) {
+        int a = year % 19,
+                b = year / 100,
+                c = year % 100,
+                d = b / 4,
+                e = b % 4,
+                g = (8 * b + 13) / 25,
+                h = (19 * a + b - d - g + 15) % 30,
+                j = c / 4,
+                k = c % 4,
+                m = (a + 11 * h) / 319,
+                r = (2 * e + 2 * j - k - h + m + 32) % 7;
+        int oneBasedMonth = (h - m + r + 90) / 25;
+        int dayOfYear = (h - m + r + oneBasedMonth + 19) % 32;
+        return dayOfYear(year, oneBasedMonth - 1, dayOfYear);
+    }
+
+}
diff --git a/src/test/java/com/netflix/simianarmy/basic/TestBasicCalendar.java b/src/test/java/com/netflix/simianarmy/basic/TestBasicCalendar.java
@@ -204,7 +204,7 @@ public void testGetBusinessDayWihHolidayNextYear() {
         Assert.assertEquals(businessDay.get(Calendar.YEAR), 2013);
         Assert.assertEquals(businessDay.get(Calendar.MONTH), Calendar.JANUARY);
         Assert.assertEquals(businessDay.get(Calendar.DAY_OF_MONTH), 2);
-        Assert.assertEquals(businessDay.get(Calendar.HOUR_OF_DAY),
-                hour);
+        Assert.assertEquals(businessDay.get(Calendar.HOUR_OF_DAY), hour);
     }
+
 }