001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.cluster;
016    
017    import aQute.bnd.annotation.ProviderType;
018    
019    import com.liferay.portal.kernel.concurrent.NoticeableFuture;
020    import com.liferay.portal.kernel.util.MethodHandler;
021    
022    /**
023     * @author Michael C. Han
024     */
025    @ProviderType
026    public interface ClusterMasterExecutor {
027    
028            public void addClusterMasterTokenTransitionListener(
029                    ClusterMasterTokenTransitionListener
030                            clusterMasterTokenAcquisitionListener);
031    
032            public <T> NoticeableFuture<T> executeOnMaster(MethodHandler methodHandler);
033    
034            public boolean isEnabled();
035    
036            public boolean isMaster();
037    
038            public void removeClusterMasterTokenTransitionListener(
039                    ClusterMasterTokenTransitionListener
040                            clusterMasterTokenAcquisitionListener);
041    
042    }