001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.kernel.cluster;
016    
017    import com.liferay.portal.kernel.exception.SystemException;
018    import com.liferay.portal.kernel.util.MethodHandler;
019    
020    import java.util.concurrent.Future;
021    
022    /**
023     * @author Michael C. Han
024     */
025    public interface ClusterMasterExecutor {
026    
027            public <T> Future<T> executeOnMaster(MethodHandler methodHandler)
028                    throws SystemException;
029    
030            public void initialize();
031    
032            public boolean isMaster();
033    
034            public void registerClusterMasterTokenTransitionListener(
035                    ClusterMasterTokenTransitionListener
036                            clusterMasterTokenAcquisitionListener);
037    
038            public void unregisterClusterMasterTokenTransitionListener(
039                    ClusterMasterTokenTransitionListener
040                            clusterMasterTokenAcquisitionListener);
041    
042    }