Examples of org.xmlBlaster.util.queue.I_Queue.peek()

org.xmlBlaster.util.queue.I_Queue.peek()
Returns the first element in the queue but does not remove it from that queue (leaves it untouched). This method does not block. @return I_QueueEntry the least element with respect to the given ordering or null if the queue is empty. @throws XmlBlasterException if the underlying implementation gets an exception.

               }
            }
         }
      }
      
      List<I_Entry> list = queue.peek(maxEntries, maxSize);
      ArrayList entryListChecked = DispatchManager.prepareMsgsFromQueue(ME, log, queue, list);
      
      MsgQueueEntry[] entries = (MsgQueueEntry[])entryListChecked.toArray(new MsgQueueEntry[entryListChecked.size()]);
      
      ArrayList ret = new ArrayList(entries.length);

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            List<I_Entry> list = null;
            int lastSize = -99;
            while (holdbackQueue.getNumOfEntries() > 0) {


               try {
                  list = holdbackQueue.peek(-1, -1);
                  if (holdbackQueue.getNumOfEntries() == lastSize) {
                     log.severe("PANIC: " + holdbackQueue.getNumOfEntries() + " entries from holdback queue " + holdbackQueue.getStorageId() + " can't be flushed, giving up!");
                     break;
                  }
                  lastSize = (int)holdbackQueue.getNumOfEntries();

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                  I_Queue historyQueue = topicHandler.getHistoryQueue();
                  if (historyQueue == null) {
                     this.isRunning = false;
                     break;
                  }
                  lst = historyQueue.peek(-1, -1L);
                  if (log.isLoggable(Level.FINE)) log.fine("processQueue: processing '" + lst.size() + "' entries from queue");
                  if (lst == null || lst.size() < 1) {
                     this.isRunning = false;
                     break;
                  }

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         if (size > 0) {
            try {
               QueuePropertyBase queueProperty = (QueuePropertyBase)msgQueue.getProperties();
               if (queueProperty == null || queueProperty.onFailureDeadMessage()) {
                  while (msgQueue.getNumOfEntries() > 0L) {
                     List<I_Entry> list = msgQueue.peek(-1, MAX_BYTES);
                     MsgQueueEntry[] msgArr = (MsgQueueEntry[])list.toArray(new MsgQueueEntry[list.size()]);
                     if (msgArr.length > 0) {
                        glob.getRequestBroker().deadMessage(msgArr, (I_Queue)null, message);
                     }
                     if (msgArr.length > 0) {

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         tmpQueue.put(entry, false);
         tmpQueue.shutdown(); // to allow to initialize again
         I_Queue tmpQueue2 = pluginManager.getPlugin(pluginInfo, queueId, cbProp);
         long numOfEntries = tmpQueue2.getNumOfEntries();
         assertEquals("Wrong number of entries in queue", 3L, numOfEntries);
         List<I_Entry> lst = tmpQueue2.peek(-1, -1L);
         assertEquals("Wrong number of entries retrieved from queue", 3, lst.size());
         queue.shutdown();
      }
      catch (Exception ex) {
         log.severe("setUp: error when setting the property 'cb.queue.persistent.tableNamePrefix' to 'TEST'");

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            long time1 = System.currentTimeMillis();
            tmpQueue.put(entries, false);
            long delta = System.currentTimeMillis() - time1;
            log.info("multiple put '" + nmax + "' entries took '" + 0.001 * delta + "' seconds which is '" + 1.0 * delta / nmax + "' ms per entry");
           
            List<I_Entry> list = tmpQueue.peek(-1, -1L);
            assertEquals("Wrong number of entries in queue", nmax, list.size());
           
            time1 = System.currentTimeMillis();
            tmpQueue.removeRandom(entries);
            delta = System.currentTimeMillis() - time1;

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