001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (C) 2012  Paul Ferraro
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Lesser General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Lesser General Public License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package net.sf.hajdbc.state.distributed;
019
020import java.util.Map;
021
022import net.sf.hajdbc.Database;
023import net.sf.hajdbc.distributed.Command;
024import net.sf.hajdbc.durability.InvocationEvent;
025import net.sf.hajdbc.durability.InvokerEvent;
026
027public class InvokerCommand<Z, D extends Database<Z>> implements Command<Void, StateCommandContext<Z, D>>
028{
029        private static final long serialVersionUID = 5093904550015002207L;
030        
031        private final RemoteInvokerDescriptor descriptor;
032        
033        protected InvokerCommand(RemoteInvokerDescriptor descriptor)
034        {
035                this.descriptor = descriptor;
036        }
037
038        /**
039         * {@inheritDoc}
040         * @see net.sf.hajdbc.distributed.Command#execute(java.lang.Object)
041         */
042        @Override
043        public Void execute(StateCommandContext<Z, D> context)
044        {
045                Map<InvocationEvent, Map<String, InvokerEvent>> invokers = context.getRemoteInvokers(this.descriptor);
046
047                InvokerEvent event = this.descriptor.getEvent();
048                String databaseId = event.getDatabaseId();
049                
050                synchronized (invokers)
051                {
052                        Map<String, InvokerEvent> map = invokers.get(event);
053                        
054                        if (map != null)
055                        {
056                                map.put(databaseId, event);
057                        }
058                }
059                
060                return null;
061        }
062
063        /**
064         * {@inheritDoc}
065         * @see java.lang.Object#toString()
066         */
067        @Override
068        public String toString()
069        {
070                return String.format("%s(%s)", this.getClass().getSimpleName(), this.descriptor);
071        }
072}