// $Id: HDRS.java,v 1.7 2008/10/21 12:10:30 vlada Exp $
package org.jgroups.protocols;
import org.jgroups.Event;
import org.jgroups.Message;
import org.jgroups.Header;
import org.jgroups.annotations.Unsupported;
import org.jgroups.stack.Protocol;
import java.util.Map;
/**
* Example of a protocol layer. Contains no real functionality, can be used as a template.
*/
@Unsupported
public class HDRS extends Protocol {
public String getName() {return "HDRS";}
private static void printMessage(Message msg, String label) {
StringBuilder sb=new StringBuilder();
sb.append(label).append(":\n");
Map<String, Header> hdrs=msg.getHeaders();
sb.append(print(msg, hdrs));
System.out.println(sb);
}
private static String print(Message msg, Map<String, Header> hdrs) {
StringBuilder sb=new StringBuilder();
int hdrs_size=0;
for(Map.Entry<String,Header> entry: hdrs.entrySet()) {
String name=entry.getKey();
Header hdr=entry.getValue();
int size=hdr.size();
hdrs_size+=size;
sb.append(name).append(": ").append(" ").append(size).append(" bytes\n");
}
sb.append("headers=").append(hdrs_size).append(", total msg size=").append(msg.size());
sb.append(", msg payload=").append(msg.getLength()).append("\n");
return sb.toString();
}
public Object up(Event evt) {
if(evt.getType() == Event.MSG) {
Message msg=(Message)evt.getArg();
printMessage(msg, "up");
}
return up_prot.up(evt); // Pass up to the layer above us
}
public Object down(Event evt) {
if(evt.getType() == Event.MSG) {
Message msg=(Message)evt.getArg();
printMessage(msg, "down");
}
return down_prot.down(evt); // Pass on to the layer below us
}
}