001/* 002 * (C) Copyright 2006-2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 */ 019package org.nuxeo.runtime.services.event; 020 021import java.util.Arrays; 022 023import org.apache.commons.logging.Log; 024import org.apache.commons.logging.LogFactory; 025import org.nuxeo.common.xmap.annotation.XNode; 026import org.nuxeo.common.xmap.annotation.XNodeList; 027import org.nuxeo.common.xmap.annotation.XObject; 028 029/** 030 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 031 */ 032@XObject("listener") 033public class ListenerDescriptor { 034 035 private static final EventListener NULL_LISTENER = event -> {}; 036 037 private static final Log log = LogFactory.getLog(ListenerDescriptor.class); 038 039 @XNodeList(value = "topic", type = String[].class, componentType = String.class) 040 String[] topics; 041 042 EventListener listener; 043 044 @XNode("@class") 045 public void setListener(Class<EventListener> listenerClass) { 046 try { 047 listener = listenerClass.newInstance(); 048 } catch (ReflectiveOperationException e) { 049 log.error(e); 050 listener = NULL_LISTENER; 051 } 052 } 053 054 @Override 055 public String toString() { 056 return listener + " { " + Arrays.toString(topics) + " }"; 057 } 058 059}