public static Long getLatestBlockTime(int key_databaseid) {
   Long latestBlockTime;
   if (Settings.DONT_REMOVE_UNUSED_MESSAGES) {
     latestBlockTime = Long.MIN_VALUE;
   } else {
     channelIdToLatestBlockTimeLock.lock();
     latestBlockTime = channelIdToLatestBlockTime.get(key_databaseid);
     if (latestBlockTime == null) {
       System.out.println("search in db: " + key_databaseid);
       latestBlockTime = Test.messageStore.getLatestBlocktime(key_databaseid);
       channelIdToLatestBlockTime.put(key_databaseid, latestBlockTime);
       Log.put("latestblocktime: " + latestBlockTime, 5);
     } else {
       Log.put("latestblocktime: " + latestBlockTime + " (restored from memory)", 5);
     }
     channelIdToLatestBlockTimeLock.unlock();
   }
   return latestBlockTime;
 }
    @Override
    public void run() {

      //
      //            try {
      //                sleep(2000);
      //            } catch (InterruptedException ex) {
      //            }
      final String orgName = Thread.currentThread().getName();
      Thread.currentThread().setName(orgName + " - MessageDownloader");
      while (!Main.shutdown) {

        lastRun = System.currentTimeMillis();

        try {

          // System.out.println("new round");
          boolean shortWait = false;

          if (!isActive()) {
            try {
              sleep(5000);
            } catch (InterruptedException ex) {
            }
            continue;
          }

          boolean requestedOne = false;

          boolean soutedPublicMsgsMax = false;
          triggered = false;
          //                System.out.println("Scanning msgs i want to have...");
          ArrayList<Peer> clonedPeerList = Test.getClonedPeerList();

          Collections.sort(
              clonedPeerList,
              new Comparator<Peer>() {

                @Override
                public int compare(Peer t, Peer t1) {
                  if (t == null || t1 == null) {
                    return Integer.MIN_VALUE;
                  }
                  return (t1.getMessageLoadedCount() - t.getMessageLoadedCount());
                }
              });

          //                    System.out.println("loaded: " +
          // clonedPeerList.get(0).getMessageLoadedCount());
          // System.out.println("top: " + clonedPeerList.get(0).getMessageLoadedCount() + " low: " +
          // clonedPeerList.get(clonedPeerList.size() - 1).getMessageLoadedCount());
          for (Peer p : clonedPeerList) {

            // if (!p.isConnected() || System.currentTimeMillis() - p.connectedSince < 500) {
            if (!p.isConnected() || !p.isAuthed() || !p.isCryptedConnection()) {
              continue;
            }

            if (p.requestedMsgs > MAX_REQUEST_PER_PEER
                || p.requestedMsgs > p.maxSimultaneousRequests
                || System.currentTimeMillis() - p.connectedSince < 1000 * 2) {
              // if (System.currentTimeMillis() - p.connectedSince < 1000 * 2) {
              shortWait = true;
              Log.put(
                  "shortwait... reason: "
                      + (p.requestedMsgs > MAX_REQUEST_PER_PEER)
                      + " "
                      + (p.requestedMsgs > p.maxSimultaneousRequests)
                      + " "
                      + (System.currentTimeMillis() - p.connectedSince < 1000 * 10),
                  2);
              continue;
            }

            //                    //Damit der download erstmal nur sehr langsam pro peer laeuft...
            //                    if (System.currentTimeMillis() - p.lastActionOnConnection < 350) {
            //                        shortWait = true;
            //                        continue;
            //                    }
            // System.out.println("asdzadgg " + Settings.MAXPUBLICMSGS + " > " + publicMsgsLoaded);
            if (Settings.MAXPUBLICMSGS > publicMsgsLoaded) {
              int maxLoadPub = Settings.MAXPUBLICMSGS - publicMsgsLoaded;

              synchronized (p.getPendingMessages()) {
                int i = 0;

                HashMap<Integer, RawMsg> asdf =
                    (HashMap<Integer, RawMsg>) p.getPendingMessagesPublic().clone();

                // System.out.println("asdbashd " + asdf.size());
                for (Entry<Integer, RawMsg> entry : asdf.entrySet()) {
                  i++;
                  if (i >= maxLoadPub) {
                    break;
                  }
                  // System.out.println("MOVED");
                  p.getPendingMessages().put(entry.getKey(), entry.getValue());
                  p.getPendingMessagesPublic().remove(entry.getKey());
                }
              }
            }

            HashMap<Integer, RawMsg> hm;
            synchronized (p.getPendingMessages()) {
              hm = ((HashMap<Integer, RawMsg>) p.getPendingMessages().clone());
            }

            //                    System.out.println("MSG Downloader: " + p.ip + ":" + p.port + "
            // PendingMsgs: " + hm.size() + " Requested: " + p.requestedMsgs);
            int msgsRequestedThisCycle = 0;

            for (Entry<Integer, RawMsg> entry : hm.entrySet()) {

              // so not all MAX_REQUEST_PER_PEER are loaded from one peer.
              if (msgsRequestedThisCycle > 20) {
                shortWait = true;
                // System.out.println("shortwait: msgsRequestedThisCycle");
                break;
              }

              //                        int bufferWaiting = 0;
              //                        synchronized (p.writeBuffer) {
              //                            bufferWaiting = p.writeBuffer.position();
              //                        }
              //
              //                        if (bufferWaiting > 5) {
              //                            System.out.println("something in buffer, not requesting
              // new msgs from this peer: " + p.getIp());
              //                            shortWait = true;
              //                            break;
              //                        }
              RawMsg m = entry.getValue();
              int messageId = entry.getKey();
              RawMsgEntry asEntryMsg = new RawMsgEntry(m);

              //                        if (m.public_type == 1) {
              //                            //stick!!
              //
              //                            System.out.println("Stick: What to do? " + myMessageId);
              //
              //                        }
              int myMessageId = MessageHolder.contains(m);

              // check if SQLTransactionRollbackException occured due to much message inserts
              if (myMessageId == -2) {
                sleep(500);
                continue;
              }

              if (p.getPeerTrustData() == null) {

                Log.put("no trust data found, not downloading messages from node...", 80);
                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }
                // Log.put("|", 200);
                continue;
              }

              if (p.getPeerTrustData() != null && myMessageId != -1) {

                RawMsg rawMsg = MessageHolder.getRawMsg(myMessageId);

                if (rawMsg == null) {
                  System.out.println(
                      "contains message but no content? likely message was removed because of wrong signature.");
                  continue;
                }

                if (!rawMsg.verified) {
                  Log.put("message in db but not verified, check again next run", 80);
                  continue;
                }

                boolean removed =
                    Test.messageStore.removeMessageToSend(
                        p.getPeerTrustData().internalId, myMessageId);

                Log.put(
                    "removed msg: "
                        + p.ip
                        + " "
                        + p.getPeerTrustData().internalId
                        + " - "
                        + myMessageId
                        + " -- "
                        + m.public_type
                        + " - "
                        + removed,
                    80);

                if (!removed && !p.removedSendMessages.contains(myMessageId)) {
                  Log.put("not removed.... sending to other node", 80);
                  m.database_Id = myMessageId;
                  m.key.database_id = Test.messageStore.getPubkeyId(m.key);
                  p.writeMessage(m);
                  p.removedSendMessages.add(myMessageId);
                }
                ////                                if (!removed) {
                ////                                    Log.put("not removed.... sending to other
                // node", 80);
                ////                                    m.database_Id = myMessageId;
                ////                                    m.key.database_id =
                // Test.messageStore.getPubkeyId(m.key);
                ////                                    p.writeMessage(m);
                ////                                }

              }

              if (myMessageId != -1) {
                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }
                Log.put("|", 200);
                continue;
              }

              // i send him a mesage to remove which i dont have, he answered that i should remove
              // this message, but i dont have it
              if (messageId == -1) {
                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }
                Log.put(
                    "i send him a mesage to remove which i dont have, he answered that i should remove this message, but i dont have it",
                    50);
                continue;
              }

              // This is just a hack for low priority msgs, see explanation after definition of
              // Settings.REDUCE_TRAFFIC!!!
              if (Settings.REDUCE_TRAFFIC && m.public_type >= 100) {
                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }
                Log.put("removed message, reduce traffic!!!", 40);
                continue;
              }

              m.key.database_id = Test.messageStore.getPubkeyId(m.key);
              // System.out.println("int: " + m.key.database_id);

              if (m.public_type == 20 && getLatestBlockTime(m.key.database_id) > m.timestamp) {
                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }

                p.writeBufferLock.lock();
                if (p.writeBuffer == null) {
                  p.writeBufferLock.unlock();
                  return;
                }

                ECKey k = m.key;
                if (!p.peerTrustData.keyToIdMine.contains(k.database_id)) {
                  p.peerTrustData.keyToIdMine.add(k.database_id);
                  // int indexOf = keyToIdMine.indexOf(k);
                  int indexOf = m.key.database_id;
                  p.writeBuffer.put((byte) 4);
                  p.writeBuffer.put(k.getPubKey());
                  p.writeBuffer.putInt(indexOf);
                  Log.put("key introduced", 0);
                }

                // m.database_Id = messageId;
                // m.key.database_id = Test.messageStore.getPubkeyId(m.key);
                if (p.writeBuffer.remaining() < 1 + 4 + 1 + 8 + 4 + 4) {
                  ByteBuffer oldbuffer = p.writeBuffer;
                  p.writeBuffer = ByteBuffer.allocate(p.writeBuffer.capacity() + 50);
                  p.writeBuffer.put(oldbuffer.array());
                  p.writeBuffer.position(oldbuffer.position());
                  System.out.println("writebuffer was raised...");
                }

                p.writeBuffer.put((byte) 5);
                p.writeBuffer.putInt(m.key.database_id);
                p.writeBuffer.put(m.public_type);
                p.writeBuffer.putLong(m.timestamp);
                p.writeBuffer.putInt(m.nonce);
                p.writeBuffer.putInt(
                    -1); // TODO: change int to long with offset in case database has much more
                         // entries!!
                // -1 because i dont have this message and i dont want it too!

                Log.put(
                    "kDBid: "
                        + m.key.database_id
                        + " public_type: "
                        + m.public_type
                        + " time: "
                        + m.timestamp
                        + " nonce: "
                        + m.nonce
                        + " mdbid: "
                        + m.database_Id,
                    0);

                p.writeBufferLock.unlock();

                p.setWriteBufferFilled();

                Log.put("removed message, already in block!!!", -30);
                continue;
              }

              // STICKS and msgs and blocks and images
              if (m.public_type == 0
                  || m.public_type == 20
                  || m.public_type == 21
                  || m.public_type > 50) {

                // normal message
                if (Settings.MAXPUBLICMSGS < publicMsgsLoaded || Settings.lightClient) {

                  //                                    if (!soutedPublicMsgsMax) {
                  //                                        System.out.println("Public msgs: " +
                  // publicMsgsLoaded + " MAX: " + Settings.MAXPUBLICMSGS);
                  //                                        soutedPublicMsgsMax = true;
                  //                                    }
                  if (m.getChannel() == null) {
                    // isPublic...
                    if (Settings.SUPERNODE) {
                      p.getPendingMessagesPublic().put(messageId, m);
                    }
                    synchronized (p.getPendingMessages()) {
                      p.getPendingMessages().remove(messageId);
                    }
                    continue;
                  }
                }

                requestedMsgsLock.lock();
                // Checke ob schon geladen wird und ueberpruefe timeout, falls peer zu langsam,
                // disconnected...
                if (requestedMsgs.contains(asEntryMsg)) {
                  // ToDo: lock for requestedMsgs ? not threadsafe currently, exception will be
                  // cautch = restart of loop (hack)
                  RawMsgEntry get = requestedMsgs.get(requestedMsgs.indexOf(asEntryMsg));
                  long delay = System.currentTimeMillis() - get.requestedWhen;
                  Log.put("delay: " + delay + " ip: " + get.requestedFromPeer.getIp(), 15);
                  if (delay < 20000L) {
                    requestedMsgsLock.unlock();
                    continue;
                  }

                  // if (delay > Settings.pingTimeout * 1000L + 60000L) {
                  if (delay > 240000L) {
                    System.out.println("MSG hard timeout... " + get.requestedFromPeer.getIp());
                    requestedMsgs.remove(get);
                    get.requestedFromPeer.getPendingMessagesTimedOut().put(messageId, get.m);
                    get.requestedFromPeer.getPendingMessages().remove(messageId);
                    // ToDo: timeout for timeoutmessages
                  } else // System.out.println("MSG soft timeout... just requesting at another
                         // peer");
                  {
                    if (get.requestedFromPeer == p) {
                      // System.out.println("softtimeout, but already requested from this peer... "
                      // + p.nonce);
                      System.out.print(":" + delay + ":");
                      requestedMsgsLock.unlock();
                      continue;
                    }
                  }
                }

                //                                System.out.println("u23zu323");
                if (!p.isConnected() || !p.isAuthed()) {
                  System.out.println("break1243!!");
                  break;
                }

                requestedOne = true;
                // Nachricht soll geladen werden

                requestedMsgs.add(asEntryMsg);
                requestedMsgsLock.unlock();
                asEntryMsg.requestedWhen = System.currentTimeMillis();
                asEntryMsg.requestedFromPeer = p;

                //                                ByteBuffer writeBuffer = p.writeBuffer;
                p.writeBufferLock.lock();
                if (p.writeBuffer == null) {
                  p.writeBufferLock.unlock();
                  continue;
                }
                p.writeBuffer.put((byte) 6);
                p.writeBuffer.putInt(messageId);
                p.writeBufferLock.unlock();

                Thread.interrupted();

                p.setWriteBufferFilled();

                if (Thread.interrupted()) {
                  System.out.println("bd2n8xnrgm63734r9mt34y349qx5qn5qn935nxc69q56t");
                }

                msgsRequestedThisCycle++;
                Log.put(" " + p.requestedMsgs + " (" + p.ip + "-" + messageId + ") ", 0);
                // System.out.println("requested... " + p.requestedMsgs);
                //

                //                        System.out.println("Nachricht download: " + p.ip + ":" +
                // p.port + " MsgTimestamp: " + m.timestamp + " Requested: " + p.requestedMsgs);
                p.requestedMsgs++;

                if (p.requestedMsgs > MAX_REQUEST_PER_PEER
                    || p.requestedMsgs > p.maxSimultaneousRequests) {
                  break;
                }

              } else if (m.public_type == 1) {

                synchronized (p.getPendingMessages()) {
                  p.getPendingMessages().remove(messageId);
                }

                // found a stick...
                // checking difficulty
                Stick stick = new Stick(m.getKey().getPubKey(), m.timestamp, m.nonce);

                double difficulty = stick.getDifficulty();

                if (difficulty < Stick.DIFFICULTY) {
                  System.out.println("Stick is invalid, not enough difficulty...");
                } else {
                  System.out.println("Stick found: " + difficulty);
                  m.verified = true;
                  RawMsg addMessage = MessageHolder.addMessage(m);
                  Test.broadcastMsg(addMessage);
                  Test.messageStore.addStick(
                      m.key.database_id,
                      messageId,
                      difficulty,
                      m.timestamp + 1000 * 60 * 60 * 24 * 7);
                }

              } else if (m.public_type == 15) {
                // remove all msgs from that chan that are older then this message with
                // public type 20 or greater 50
                // removeMessagesFromChannel
                // TODO WRONG PLACE HERE! implement in ConnectionHandler!
              } else {
                System.out.println("Message type not defined.... " + m.public_type);
              }
            }
          }

          if (!triggered) {
            syncInterrupt.lock();
            allowInterrupt = true;
            syncInterrupt.unlock();
            try {

              // System.out.println("wait");
              if (shortWait) {
                sleep(500);
              } else {
                sleep(1000 * 60 * 5);
              }

            } catch (InterruptedException ex) {
            }
            syncInterrupt.lock();
            allowInterrupt = false;
            syncInterrupt.unlock();
          }

          // sleep, so we can wait for others nodes to introduce the same message (this reduces CPU
          // usage, but delays messages a bit)
          if (WAIT_FOR_OTHER_NODES_TO_INTRODUCE != 0) {
            try {
              sleep(WAIT_FOR_OTHER_NODES_TO_INTRODUCE);
            } catch (InterruptedException ex) {
            }
          }
          // clear interrupted flag, might called twice, so writeBuffer would think it was
          // interrupted...
          interrupted();

          // Keine nachricht zum requesten, warte auf neue Nachricht, bzw timeout checken
          //                if (!requestedOne) {
          //                    while (!triggered) {
          //                        try {
          //                            sleep(1000 * 5);
          //                        } catch (InterruptedException ex) {
          //                        }
          //
          //                        //muss timeout geprueft werden?
          ////                        if (!requestedMsgs.isEmpty()) {
          ////                            break;
          ////                        }
          //
          //
          //
          //                    }
          //
          //                }
        } catch (Throwable e) {

          Test.sendStacktrace("SLEEP ! catched msg downloader exc.: \n", e);

          System.out.println("MessageDownloader exception!!!!: ");
          e.printStackTrace();

          try {
            sleep(60000);
          } catch (InterruptedException ex) {
          }
        }
      }
    }