--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/datasegment/DataSegmentManager.java	Sun Dec 11 06:37:05 2011 +0900
@@ -0,0 +1,22 @@
+package alice.datasegment;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Future;
+
+import org.msgpack.type.Value;
+
+public abstract class DataSegmentManager {
+	ConcurrentHashMap<String, DataSegmentKey> dataSegments = new ConcurrentHashMap<String, DataSegmentKey>();
+	
+	public abstract void put(String key, Value val);
+	public Future<Value> take(String key) {
+		return take(key, 0);
+	}
+	public abstract Future<Value> take(String key, int index);
+	public Future<Value> peek(String key) {
+		return peek(key, 0);
+	}
+	public abstract Future<Value> peek(String key, int index);
+	public abstract void delete(String key);
+	
+}