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package org.netbeans.modules.collab.channel.filesharing.filehandler;
import java.util.*;
import org.netbeans.modules.collab.channel.filesharing.FilesharingConstants;
import org.netbeans.modules.collab.core.Debug;
/**
* CollabQueue
*
* @author Ayub Khan, ayub.khan@sun.com
* @version 1.0
*/
public class RegionQueue extends Object implements FilesharingConstants {
////////////////////////////////////////////////////////////////////////////
// Class variables
////////////////////////////////////////////////////////////////////////////
public static final long MULTI_FACTOR = 1;
////////////////////////////////////////////////////////////////////////////
// Instance variables
////////////////////////////////////////////////////////////////////////////
/* queue Items */
private Vector qItems = new Vector();
/* valid */
private boolean valid = false;
private RegionQueueWorkerThread worker = null;
/* collabFileHandler */
private CollabFileHandler collabFileHandler = null;
/**
*
*
*/
public RegionQueue(CollabFileHandler collabFileHandler) {
super();
this.collabFileHandler = collabFileHandler;
}
////////////////////////////////////////////////////////////////////////////
// methods
////////////////////////////////////////////////////////////////////////////
/**
* addItem
*
* @param item
*/
public void addItem(RegionQueueItem item) {
qItems.add(item);
Debug.log("RegionQueue", "CollabQueue, item: " + item.getBeginLine()); // NOI18N
//long previousItemSize=item.getSize();
if ((worker == null) && (qItems.size() > 0)) {
worker = new RegionQueueWorkerThread(this, collabFileHandler);
long delay = CREATELOCK_TIMER_START_DELAY;
long rate = CREATELOCK_TIMER_RATE;
Debug.log(
"RegionQueue",
"CollabQueue, item: " + item.getBeginLine() + //NoI18n
" scheduling for: " + delay + " with rate: " + rate
); //NoI18n
worker.scheduleAtFixedRate(delay, rate);
} else {
worker.incrementDelay(CREATELOCK_NEWITEM_INCREMENT_DELAY);
}
}
/**
* getItem
*
* @return QueueItem
*/
public RegionQueueItem getItem() {
if ((qItems == null) || (qItems.size() == 0)) {
return null;
}
RegionQueueItem item = (RegionQueueItem) qItems.firstElement();
//qItems.removeElementAt(0);
return item;
}
/**
* removeItem
*
* @return status
*/
public boolean removeItem(RegionQueueItem item) {
Debug.log("RegionQueue", "RegionQueueWorkerThread, cancel: " + item.getBeginLine()); //NoI18n
boolean status = qItems.removeElement(item);
if (qItems.size() == 0) {
worker.cancel();
worker = null;
}
return status;
}
}
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