From 0cbdc4ecb927b7ab068e5833caefbba65c9aa87a Mon Sep 17 00:00:00 2001
From: Alexander Alexeev
Date: Sat, 10 Dec 2016 21:00:14 +0700
Subject: caching date formatter

---
 .../juick/www/formatter/SpringDateFormatter.java   | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 juick-spring-www/src/main/java/com/juick/www/formatter/SpringDateFormatter.java

(limited to 'juick-spring-www/src/main/java/com/juick/www/formatter/SpringDateFormatter.java')

diff --git a/juick-spring-www/src/main/java/com/juick/www/formatter/SpringDateFormatter.java b/juick-spring-www/src/main/java/com/juick/www/formatter/SpringDateFormatter.java
new file mode 100644
index 00000000..61a2fe88
--- /dev/null
+++ b/juick-spring-www/src/main/java/com/juick/www/formatter/SpringDateFormatter.java
@@ -0,0 +1,45 @@
+package com.juick.www.formatter;
+
+import com.juick.util.DateFormatter;
+import org.springframework.context.MessageSource;
+import org.springframework.format.Formatter;
+
+import javax.annotation.Resource;
+import java.text.ParseException;
+import java.util.Date;
+import java.util.Locale;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+/**
+ * Created by aalexeev on 11/22/16.
+ */
+public class SpringDateFormatter implements Formatter<Date> {
+    @Resource
+    private MessageSource messageSource;
+    private ConcurrentMap<Locale, com.juick.util.DateFormatter> formattersMap =
+            new ConcurrentHashMap<>(4, 0.75f, 2); // MAX 4 languages and 4/2=2 threads for write
+
+
+    @Override
+    public Date parse(final String text, final Locale locale) throws ParseException {
+        DateFormatter formatter = formattersMap.getOrDefault(
+                locale, createFormatter(locale));
+
+        return formatter.parse(text);
+    }
+
+    @Override
+    public String print(final Date object, final Locale locale) {
+        DateFormatter formatter = formattersMap.getOrDefault(
+                locale, createFormatter(locale));
+        return formatter.format(object);
+    }
+
+    private DateFormatter createFormatter(final Locale locale) {
+        String pattern = messageSource.getMessage("date.format", null, locale);
+
+        return new DateFormatter(pattern);
+    }
+
+}
-- 
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