--- a/src/alice/codesegment/CodeSegment.java	Mon Apr 07 20:37:38 2014 +0900
+++ b/src/alice/codesegment/CodeSegment.java	Mon Apr 14 15:46:29 2014 +0900
@@ -10,6 +10,13 @@
 	public InputDataSegment ids = new InputDataSegment(this);
 	public OutputDataSegment ods = new OutputDataSegment();
 	public ArrayList<Receiver> list = new ArrayList<Receiver>();
+	public CodeSegment codeSegment; 
+	private Class<CodeSegment> meta;
+	private boolean flag = false;
+	
+	public void setKey(){
+		// for meta CodeSegment
+	}
 	
 	public void execute() {
 		ids.receive();
@@ -23,4 +30,27 @@
 		}
 	}
 
+	@SuppressWarnings("unchecked")
+	public <T> void setMeta(Class<T> cs){
+		flag = true;
+		meta = (Class<CodeSegment>) cs;
+	}
+	
+	public boolean hasMeta(){
+		return flag;		
+	}
+	
+	public void setCodeSegment(CodeSegment cs){
+		codeSegment = cs;
+	}
+	
+	public CodeSegment getCodeSegment(){
+		return codeSegment;
+	}
+	
+	public Class<CodeSegment> getMetaClass(){
+		flag = false;
+		return meta;
+	}
+	
 }

--- a/src/alice/codesegment/CodeSegmentManager.java	Mon Apr 07 20:37:38 2014 +0900
+++ b/src/alice/codesegment/CodeSegmentManager.java	Mon Apr 14 15:46:29 2014 +0900
@@ -10,10 +10,10 @@
 
 	private static CodeSegmentManager instance = new CodeSegmentManager();
 	private ThreadPoolExecutor codeSegmentExecutor = new ThreadPoolExecutor(Runtime.getRuntime().availableProcessors(), // initial number of threads
-				                                Runtime.getRuntime().availableProcessors(),
-												Integer.MAX_VALUE, // keepAliveTime
-												TimeUnit.SECONDS,
-												new LinkedBlockingQueue<Runnable>());
+			Runtime.getRuntime().availableProcessors(),
+			Integer.MAX_VALUE, // keepAliveTime
+			TimeUnit.SECONDS,
+			new LinkedBlockingQueue<Runnable>());
 	private Logger logger = Logger.getLogger(CodeSegmentManager.class);
 
 	public static CodeSegmentManager get() {
@@ -21,11 +21,23 @@
 	}
 
 	public static void submit(CodeSegment cs) {
-		CodeSegmentManager csManager = CodeSegmentManager.get();
-		csManager.codeSegmentExecutor.execute(cs);
-		if (csManager.logger.isDebugEnabled()) {
-			csManager.logger.debug(cs.getClass().getName());
+		if (cs.hasMeta()){
+			try {
+				CodeSegment meta = cs.getMetaClass().newInstance();
+				meta.setCodeSegment(cs);
+				meta.setKey();
+
+			} catch (Exception e) {
+				e.printStackTrace();
+			}
+
+		} else {
+			CodeSegmentManager csManager = CodeSegmentManager.get();
+			csManager.codeSegmentExecutor.execute(cs);
+			if (csManager.logger.isDebugEnabled()) {
+				csManager.logger.debug(cs.getClass().getName());
+			}
 		}
 	}
-	
+
 }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/codesegment/MetaCodeSegment.java	Mon Apr 14 15:46:29 2014 +0900
@@ -0,0 +1,5 @@
+package alice.codesegment;
+
+public abstract class MetaCodeSegment extends CodeSegment{
+	abstract public void setKey();
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/test/codesegment/api/PrintNumber.java	Mon Apr 14 15:46:29 2014 +0900
@@ -0,0 +1,28 @@
+package alice.test.codesegment.api;
+
+import alice.codesegment.CodeSegment;
+import alice.codesegment.CodeSegmentManager;
+import alice.datasegment.CommandType;
+import alice.datasegment.Receiver;
+
+public class PrintNumber extends CodeSegment {
+	private Receiver info1 = ids.create(CommandType.PEEK);
+	
+	public PrintNumber(){
+		ods.put("TEST1", 123);
+		
+	}
+
+	@Override
+	public void run() {
+		Integer num = info1.asInteger();
+		System.out.println(num);
+		CodeSegmentManager.submit(codeSegment);// javassist
+		
+	}
+
+	public void setKey() {		
+		info1.setKey("TEST1");
+	}
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/test/codesegment/api/PrintText.java	Mon Apr 14 15:46:29 2014 +0900
@@ -0,0 +1,23 @@
+package alice.test.codesegment.api;
+
+import alice.codesegment.CodeSegment;
+import alice.datasegment.CommandType;
+import alice.datasegment.Receiver;
+
+public class PrintText extends CodeSegment {
+	private Receiver info1 = ids.create(CommandType.PEEK);
+
+	public PrintText(){
+		setMeta(PrintNumber.class);
+		info1.setKey("TEST");
+	}
+	
+	@Override
+	public void run() {
+		String str = info1.asString();
+		System.out.println(str);
+		
+		new PrintText();
+	}
+
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/alice/test/codesegment/api/TestMetaCodeSegment.java	Mon Apr 14 15:46:29 2014 +0900
@@ -0,0 +1,19 @@
+package alice.test.codesegment.api;
+
+import alice.codesegment.CodeSegment;
+import alice.daemon.AliceDaemon;
+import alice.daemon.Config;
+
+public class TestMetaCodeSegment extends CodeSegment{
+	public static void main(String[] args){
+		new AliceDaemon(new Config(args)).listen();
+		new TestMetaCodeSegment().execute();
+	}
+
+	@Override
+	public void run() {
+		new PrintText();
+		ods.put("TEST", "START");
+	}
+
+}

--- a/src/alice/topology/manager/StartTopologyManager.java	Mon Apr 07 20:37:38 2014 +0900
+++ b/src/alice/topology/manager/StartTopologyManager.java	Mon Apr 14 15:46:29 2014 +0900
@@ -74,6 +74,7 @@
 			logger.error("File format error: " + conf.confFilePath);
 			e.printStackTrace();
 		}
+
 		HashMap<String, ArrayList<HostMessage>> connectionList = new HashMap<String, ArrayList<HostMessage>>();
 		ods.put("connection", connectionList);
 		ods.put("_ABSIPTABLE" ,new ArrayList<HostMessage>());