juick-www: pebble pretty time filter

1 files changed, 36 insertions, 0 deletions

diff --git a/juick-core/src/main/java/com/juick/util/PrettyTimeFormatter.java b/juick-core/src/main/java/com/juick/util/PrettyTimeFormatter.java
new file mode 100644
index 00000000..69be724b
--- /dev/null
+++ b/juick-core/src/main/java/com/juick/util/PrettyTimeFormatter.java
@@ -0,0 +1,36 @@
+package com.juick.util;
+
+import org.ocpsoft.prettytime.PrettyTime;
+
+import java.util.Date;
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+
+/**
+ * Created by vitalyster on 04.05.2017.
+ */
+public class PrettyTimeFormatter {
+    private static final int MAX_CACHE_SIZE = 20;
+
+    // Cache PrettyTime per locale. LRU cache to prevent memory leak.
+    private static final Map<Locale, PrettyTime> PRETTY_TIME_LOCALE_MAP =
+            new LinkedHashMap<Locale, PrettyTime>(MAX_CACHE_SIZE + 1, 1.1F, true)
+    {
+        @Override
+        protected boolean removeEldestEntry(Map.Entry<Locale, PrettyTime> eldest)
+        {
+            return size() > MAX_CACHE_SIZE;
+        }
+    };
+
+    public String format(final Locale locale, final Date value)
+    {
+        PrettyTime prettyTime;
+
+        synchronized (PRETTY_TIME_LOCALE_MAP) {
+            prettyTime = PRETTY_TIME_LOCALE_MAP.computeIfAbsent(locale, PrettyTime::new);
+        }
+        return prettyTime.format(value);
+    }
+}