File	Doc	Category	Size	Date	Package
TimedTaskList.java	API Doc	Glassfish v2 API	6409	Fri May 04 22:32:18 BST 2007	com.sun.enterprise.util.scheduler

TimedTaskList

• java.lang.Object

Fields Summary
private com.sun.enterprise.util.collection.DListNode	first First dummy node.
private com.sun.enterprise.util.collection.DListNode	last Last dummy node.
private int	size Maintains the current size of the list.

Constructors Summary
protected TimedTaskList() Constructor for TimedTaskList, created a new DList object. first = new DListNode(null); last = new DListNode(null); first.next = last; last.prev = first; first.prev = last.next = null;

Methods Summary
protected boolean	addTask(PeriodicallyServicable taskObj, int startingTime, long currentTime) Add a new servicable task into the task list (ordered in increasing order). param taskObj servicable object to add. param startingTime wait for how long to start considering this task. param currentTime current time when executing other tasks. return boolean true on success, false otherwise. TaskData task = new TaskData(); task.obj = taskObj; // decrement frequency time as it will be added on insertTask( ) anyway task.abs_execute_time = currentTime + startingTime - taskObj.getFrequency(); return insertTask(task);
protected TaskData	getFirstTask() Remove first task from the ordered list, and return it. return first task on the queue. DListNode node = first; node = node.next; if(null!=node.next) // not the end { node.delink(); --size; return (TaskData) node.object; } return null;
protected boolean	insertTask(TaskData task) Insert task back into the task list (ordered in increasing order). param task object to execute in an order. return boolean true on success, false otherwise. task.abs_execute_time += ((PeriodicallyServicable)task.obj).getFrequency(); DListNode addingNode = new DListNode(task); DListNode node = first; ++size; for(int i=0; i<size-1; i++) { node = node.next; long nodeTime = ((TaskData)node.object).abs_execute_time; if(nodeTime > task.abs_execute_time) { node.insertBefore(addingNode); return true; } } node.insertAfter(addingNode); return true;
protected boolean	removeTask(PeriodicallyServicable obj) Removes the Servicable object from the task list permanently. param obj servicable object to remove. return boolean true on success, false otherwise. DListNode node = first; for(int i=0; i<size; i++) { node = node.next; PeriodicallyServicable nodeObj = ((TaskData)node.object).obj; if(nodeObj.equals(obj)) { node.delink(); --size; return true; } } return false;
protected int	size() Return the size of the task list. return 0 if empty, otherwise a number indicating the number of elements. return size;
public java.lang.String	toString() Prints information about the list and its contents. return String StringBuffer sb = new StringBuffer(100); sb.append(" [TimedTaskList: "); sb.append( size + " elements: "); DListNode node = first; while(null!=node.next && null!=node.next.object) { node = node.next; sb.append((int) ( ((TaskData)node.object).abs_execute_time / 1000) ); sb.append(","); } sb.append("] "); return sb.toString();