make ConnectionInfo comparable and sort list of connections in Connections_p

ConnectionInfo compare by initTime
Connections_p implement wish to sort connections, descending

Signed-off-by: Marek Otahal <markotahal@gmail.com>

htroot/Connections_p.java

@@ -43,6 +43,9 @@ import de.anomic.server.serverCore;
 import de.anomic.server.serverCore.Session;
 import de.anomic.server.serverObjects;
 import de.anomic.server.serverSwitch;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
 
 public final class Connections_p {    
     
@@ -141,11 +144,14 @@ public final class Connections_p {
         
         // client sessions
         final Set<ConnectionInfo> allConnections = ConnectionInfo.getAllConnections();
-        // TODO sorting
-//        Arrays.sort(a, httpc.connectionTimeComparatorInstance);
+        // sorting: sort by initTime, decending
+        List<ConnectionInfo> allConnectionsSorted = new LinkedList<ConnectionInfo>(allConnections);
+        Collections.sort(allConnectionsSorted);
+        Collections.reverse(allConnectionsSorted); // toggle ascending/descending
+        
         int c = 0;
-        synchronized (allConnections) {
-        for (final ConnectionInfo conInfo: allConnections) {
+        synchronized (allConnectionsSorted) {
+        for (final ConnectionInfo conInfo: allConnectionsSorted) {
             prop.put("clientList_" + c + "_clientProtocol", conInfo.getProtocol());
             prop.putNum("clientList_" + c + "_clientLifetime", conInfo.getLifetime());
             prop.putNum("clientList_" + c + "_clientUpbytes", conInfo.getUpbytes());

source/net/yacy/cora/protocol/ConnectionInfo.java

@@ -36,7 +36,7 @@ import java.util.Set;
  * @author daniel
  * @author sixcooler
  */
-public class ConnectionInfo {
+public class ConnectionInfo implements Comparable<ConnectionInfo> {
     /**
      * a list of all current connections to be shown in Connections_p
      */
@@ -270,4 +270,11 @@ public class ConnectionInfo {
         final ConnectionInfo other = (ConnectionInfo) obj;
         return this.id == other.id;
     }
+
+    public int compareTo(ConnectionInfo o) {
+        if(o==null) throw new NullPointerException("ConnectionInfo: compare() : passed argument is null \n");
+        if(this.initTime>o.initTime) return 1;
+        else if(this.initTime<o.initTime) return -1;
+        else return 0;
+    }
 }