001/* 002 * (C) Copyright 2006-2012 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 * 019 * $Id$ 020 */ 021package org.nuxeo.ecm.platform.scanimporter.listener; 022 023import java.util.concurrent.locks.ReentrantLock; 024 025import org.apache.commons.logging.Log; 026import org.apache.commons.logging.LogFactory; 027import org.nuxeo.ecm.core.event.Event; 028import org.nuxeo.ecm.core.event.EventListener; 029import org.nuxeo.ecm.platform.scanimporter.processor.ScannedFileImporter; 030 031/** 032 * Listen to Scheduler events to check if new scanned files are availables Trigger the importer if not already busy. 033 * 034 * @author Thierry Delprat 035 */ 036public class IngestionTrigger implements EventListener { 037 038 private static final Log log = LogFactory.getLog(IngestionTrigger.class); 039 040 private static final ReentrantLock LOCK = new ReentrantLock(); 041 042 public static final String START_EVENT = "ScanIngestionStart"; 043 044 // fired via the Scheduler 045 @Override 046 public void handleEvent(Event event) { 047 048 if (!START_EVENT.equals(event.getName())) { 049 return; 050 } 051 052 if (LOCK.tryLock()) { 053 try { 054 log.info("Start injection process"); 055 ScannedFileImporter importer = new ScannedFileImporter(); 056 if (event.getContext().getProperty("Testing") != null) { 057 event.getContext().setProperty("Tested", true); 058 } else { 059 importer.doImport(); 060 } 061 } finally { 062 LOCK.unlock(); 063 } 064 } else { 065 log.info("Ingestion already in progress, waiting for next wake up"); 066 } 067 } 068 069}