+ add Queue support for the the redis list

spring-datastore-redis/src/main/java/org/springframework/datastore/redis/util/DefaultRedisList.java

@@ -19,6 +19,8 @@ import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
+import java.util.NoSuchElementException;
+import java.util.Queue;
 
 import org.springframework.datastore.redis.connection.RedisCommands;
 
@@ -27,7 +29,7 @@ import org.springframework.datastore.redis.connection.RedisCommands;
  * 
  * @author Costin Leau
  */
-public class DefaultRedisList extends AbstractRedisCollection implements RedisList {
+public class DefaultRedisList extends AbstractRedisCollection implements RedisList, Queue<String> {
 
 	public DefaultRedisList(String key, RedisCommands commands) {
 		super(key, commands);
@@ -144,4 +146,43 @@ public class DefaultRedisList extends AbstractRedisCollection implements RedisLi
 	public List<String> subList(int fromIndex, int toIndex) {
 		throw new UnsupportedOperationException();
 	}
+
+
+	@Override
+	public String element() {
+		String value = peek();
+		if (value == null)
+			throw new NoSuchElementException();
+
+		return value;
+	}
+
+
+	@Override
+	public boolean offer(String e) {
+		commands.lPush(key, e);
+		return true;
+	}
+
+
+	@Override
+	public String peek() {
+		return commands.lIndex(key, 0);
+	}
+
+
+	@Override
+	public String poll() {
+		return commands.lPop(key);
+	}
+
+
+	@Override
+	public String remove() {
+		String value = poll();
+		if (value == null)
+			throw new NoSuchElementException();
+
+		return value;
+	}
 }