Test execution instructions.

Author: emacarron

src/main/java/org/mybatis/caches/redis/RedisCache.java

@@ -15,6 +15,7 @@
  */
 package org.mybatis.caches.redis;
 
+import java.util.Map;
 import java.util.concurrent.locks.ReadWriteLock;
 
 import org.apache.ibatis.cache.Cache;
@@ -58,8 +59,13 @@ public String getId() {
 	}
 
 	public int getSize() {
-	  return 0;
-	}
+    return (Integer) execute(new RedisCallback() {
+      public Object doWithRedis(Jedis jedis) {
+        Map<byte[], byte[]> result = jedis.hgetAll(id.toString().getBytes());
+        return result.size();
+      }
+    });
+  }
 
 	public void putObject(final Object key, final Object value) {
 		execute(new RedisCallback() {

src/test/java/org/mybatis/caches/redis/LoggingEhcacheTestCase.java

@@ -23,6 +23,10 @@
 import org.junit.Test;
 
 /**
+ * Test with Ubuntu
+ * sudo apt-get install redis-server
+ * execute the test
+ * 
  * @version $Id$
  */
 public final class RedisTestCase {