Java tutorial
package com.romeikat.datamessie.core.processing.task.documentReindexing; /*- * ============================LICENSE_START============================ * data.messie (core) * ===================================================================== * Copyright (C) 2013 - 2017 Dr. Raphael Romeikat * ===================================================================== * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/gpl-3.0.html>. * =============================LICENSE_END============================= */ import java.util.Collection; import java.util.Set; import com.google.common.collect.Sets; public class DocumentsToBeReindexed { private Set<Long> documentsToBeReindexed; DocumentsToBeReindexed() { documentsToBeReindexed = Sets.newHashSet(); } synchronized void toBeReindexed(final Collection<Long> documentIds) { documentsToBeReindexed.addAll(documentIds); } synchronized Set<Long> pollAll() { final Set<Long> result = documentsToBeReindexed; documentsToBeReindexed = Sets.newHashSet(); return result; } }