svn-gvsig-desktop / tags / v2_0_0_Build_2020 / libraries / libRemoteServices / src / org / gvsig / remoteclient / taskplanning / ITaskPlanner.java @ 33856
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| 1 | 29670 | jpiera | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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| 2 | *
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| 3 | * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.
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| 4 | *
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| 5 | * This program is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU General Public License
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| 7 | * as published by the Free Software Foundation; either version 2
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| 8 | * of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program; if not, write to the Free Software
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| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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| 18 | *
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| 19 | * For more information, contact:
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| 20 | *
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| 21 | * Generalitat Valenciana
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| 22 | * Conselleria d'Infraestructures i Transport
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| 23 | * Av. Blasco Ib??ez, 50
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| 24 | * 46010 VALENCIA
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| 25 | * SPAIN
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| 26 | *
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| 27 | * +34 963862235
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| 28 | * gvsig@gva.es
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| 29 | * www.gvsig.gva.es
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| 30 | *
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| 31 | * or
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| 32 | *
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| 33 | * IVER T.I. S.A
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| 34 | * Salamanca 50
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| 35 | * 46005 Valencia
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| 36 | * Spain
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| 37 | *
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| 38 | * +34 963163400
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| 39 | * dac@iver.es
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| 40 | */
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| 41 | |||
| 42 | /* CVS MESSAGES:
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| 43 | *
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| 44 | * $Id$
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| 45 | * $Log$
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| 46 | * Revision 1.2 2006-05-12 07:45:49 jaume
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| 47 | * some warnings removed
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| 48 | *
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| 49 | * Revision 1.1 2006/05/12 07:15:45 jaume
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| 50 | * *** empty log message ***
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| 51 | *
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| 52 | * Revision 1.1 2006/05/11 17:18:06 jaume
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| 53 | * Un planificador, monitorizador, de descargas que trabaja en segundo plano
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| 54 | *
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| 55 | *
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| 56 | */
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| 57 | package org.gvsig.remoteclient.taskplanning; |
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| 58 | |||
| 59 | /**
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| 60 | * <p>
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| 61 | * ITaskPlanner provides an interface to program your own task planning. It gives
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| 62 | * you operations for pick a task from the queue according on the criteria that
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| 63 | * you designed.<br>
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| 64 | * </p>
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| 65 | * <p>
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| 66 | * The simplest implementation of ITaskPlanner would be a FIFO task planner (see
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| 67 | * FIFOTaskPlanner.java) which takes jobs from a task queue in the same order
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| 68 | * they were put. But any kind of planner is possible (SJF, LIFO, RoundRobin, etc.).
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| 69 | * </p>
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| 70 | * @author jaume dominguez faus - jaume.dominguez@iver.es
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| 71 | *
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| 72 | */
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| 73 | public interface ITaskPlanner { |
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| 74 | /**
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| 75 | * Takes the next task to be executed.
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| 76 | * @return IRunnableTask representing the next task to be executed
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| 77 | */
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| 78 | public IRunnableTask nextTask();
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| 79 | |||
| 80 | /**
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| 81 | * Takes the previous executed task. Notice that it may or may not have
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| 82 | * sense for specific implementations. For example, in a FIFO-like planner,
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| 83 | * the task is taken from the queue, executed until it is finished and
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| 84 | * removed from the queue. So, there is no previous task.
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| 85 | *
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| 86 | * @return IRunnableTask representing the previous executed task, or null
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| 87 | * if none.
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| 88 | * @deprecated (probably this is unuseful and i'll remove it)
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| 89 | */
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| 90 | public IRunnableTask previousTask();
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| 91 | } |