Example usage for org.apache.commons.collections.map LinkedMap nextKey

Introduction

In this page you can find the example usage for org.apache.commons.collections.map LinkedMap nextKey.

Prototype

public Object nextKey(Object key) 

Source Link

Document

Gets the next key in sequence.

Usage

From source file:de.innovationgate.wgpublisher.webtml.EventScript.java

/**
 * Searches the fired events queue for events of a name, beginning at a specified index
 * @param name The event name to search for
 * @param index The start index in the queue
 * @return a list of found events/*  w  w  w.  java 2  s . c o  m*/
 * @throws WGAPIException 
 */
private List<PortletEvent> findEventsOfName(String name, Long index) throws WGAPIException {

    List<PortletEvent> foundEvents = new ArrayList<PortletEvent>();
    HttpSession session = getPageContext().getSession();
    LinkedMap events = TMLPortlet.getFiredEventsQueue(session);

    if (events.size() == 0) {
        return foundEvents;
    }

    // Find the start index. This is either the index after the last processed index, or - if the last processed
    // index is not available in the queue - the first index in the queue. 
    if (events.containsKey(index)) {
        index = (Long) events.nextKey(index);
    } else {
        index = (Long) events.firstKey();
    }

    synchronized (events) {
        PortletEvent event;
        while (index != null) {
            event = (PortletEvent) events.get(index);
            String targetPortletKey = event.getTargetPortletKey();
            if (targetPortletKey == null
                    || targetPortletKey.equals(getTMLContext().getportlet().getportletkey())) {
                if (event.getName().equalsIgnoreCase(name)) {
                    foundEvents.add(event);
                }
            }
            index = (Long) events.nextKey(index);

        }
    }

    return foundEvents;

}

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From source file:de.innovationgate.wgpublisher.webtml.portlet.TMLPortlet.java

public void prepareEventProcessing(Base tag) throws WGAPIException {

    TMLPortletState sessionContext = getState();
    LinkedMap list = TMLPortlet.getFiredEventsQueue(tag.getPageContext().getSession());

    // Look if the event queue proceeded since the last processed event
    if (list.size() > 0) {
        PortletEvent lastEvent = (PortletEvent) list.get(list.lastKey());
        if (lastEvent != null) {
            if (lastEvent.getIndex() > sessionContext.getLastProcessedEventIndex()) {

                // Find the start index for processing new events
                Long startIndex;/*from   w w  w  .j a v  a2  s .c  o m*/
                Long lastProcessedIndex = new Long(sessionContext.getLastProcessedEventIndex());
                if (list.containsKey(lastProcessedIndex)) {
                    startIndex = (Long) list.nextKey(lastProcessedIndex);
                } else {
                    startIndex = (Long) list.firstKey();
                }

                // Set start index as WebTML option
                tag.getStatus().setOption(Base.OPTION_PORTLET_EVENT_STARTINDEX,
                        new Long(sessionContext.getLastProcessedEventIndex()), TMLOption.SCOPE_GLOBAL);

                // Update last processed event index to be the newest event's index
                sessionContext.setLastProcessedEventIndex(lastEvent.getIndex());
            }
        }
    }
}

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