/**
* This Source Code Form is subject to the terms of the Mozilla Public License,
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
* the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
*
* Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
* graphic logo is a trademark of OpenMRS Inc.
*/
package org.openmrs.api;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Holds all OpenMRS event listeners
*/
public class EventListeners {
private static Logger log = LoggerFactory.getLogger(EventListeners.class);
private static List<GlobalPropertyListener> globalPropertyListeners = null;
public EventListeners() {
}
public List<GlobalPropertyListener> getGlobalPropertyListeners() {
return globalPropertyListeners;
}
/**
* This setter acts more like an "appender". If the list already has elements, calling this method
* will <b>add to</b> the list of listeners instead of replacing it.
*
* @param globalPropertyListeners
*/
public void setGlobalPropertyListeners(List<GlobalPropertyListener> globalPropertyListeners) {
if (log.isDebugEnabled()) {
StringBuilder sb = new StringBuilder();
for (GlobalPropertyListener gpl : globalPropertyListeners) {
if (sb.length() > 0) {
sb.append(", ");
}
sb.append(gpl.getClass().getName());
}
log.debug("GlobalPropertyListeners set to: " + sb.toString());
}
if (EventListeners.globalPropertyListeners == null) {
EventListeners.globalPropertyListeners = globalPropertyListeners;
} else {
for (GlobalPropertyListener gpl : globalPropertyListeners) {
if (!EventListeners.globalPropertyListeners.contains(gpl)) {
EventListeners.globalPropertyListeners.add(gpl);
}
}
}
}
/**
* Convenience method called by spring to reset the static list of event
* listeners.<br>
* Without this, the event listener list continues to grow with every Spring
* restart. (and is a memory leak)
*
* @see "applicationContext-service.xml"
* @param nullList
* if true, nulls the list instead of just clearing it
*/
public void setGlobalPropertyListenersToEmpty(boolean nullList) {
if (nullList) {
setGlobalPropertyListeners(null);
} else if (EventListeners.globalPropertyListeners != null) {
EventListeners.globalPropertyListeners.clear();
}
}
}