Mercurial > dive4elements > framework
changeset 306:9dbeb88006e9
Added simple in-memory LRU cache
artifacts/trunk@2414 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Thu, 28 Jul 2011 14:08:25 +0000 |
| parents | f33401ea2a6c |
| children | d96bcb40dbf9 |
| files | ChangeLog artifacts-common/src/main/java/de/intevation/artifacts/common/utils/LRUCache.java |
| diffstat | 2 files changed, 31 insertions(+), 0 deletions(-) [+] |
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--- a/ChangeLog Thu Jul 28 10:19:35 2011 +0000 +++ b/ChangeLog Thu Jul 28 14:08:25 2011 +0000 @@ -1,3 +1,8 @@ +2011-07-28 Sascha L. Teichmann <teichmann@intevation.de> + + * artifacts-common/src/main/java/de/intevation/artifacts/common/utils/LRUCache.java: + New. Simple LRU cache based on java.util.LinkedHashMap. + 2011-07-28 Sascha L. Teichmann <teichmann@intevation.de> Refactorized the usage of dialect independent SQL to be reusable.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/artifacts-common/src/main/java/de/intevation/artifacts/common/utils/LRUCache.java Thu Jul 28 14:08:25 2011 +0000 @@ -0,0 +1,26 @@ +package de.intevation.artifacts.common.utils; + +import java.util.Map; +import java.util.LinkedHashMap; + +public class LRUCache<K, V> +extends LinkedHashMap<K, V> +{ + public static final int DEFAULT_MAX_CAPACITY = 25; + + private int maxCapacity; + + public LRUCache() { + this(DEFAULT_MAX_CAPACITY); + } + + public LRUCache(int maxCapacity) { + this.maxCapacity = maxCapacity; + } + + @Override + protected boolean removeEldestEntry(Map.Entry<K, V> eldest) { + return size() > maxCapacity; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :